:root {
    --color-primary: #1e3a5f;
    --color-primary-dark: #152b48;

    --color-secondary: #0f9d91;
    --color-secondary-dark: #087b72;

    --color-accent: #f4b942;

    --color-maths: #0f9d91;
    --color-physics: #d86b20;
    --color-chemistry: #7656b5;

    --color-background: #f5f8fc;
    --color-surface: #ffffff;
    --color-surface-soft: #edf7f6;

    --color-text: #172033;
    --color-text-muted: #596579;

    --color-success: #238b57;
    --color-error: #c43d4b;
    --color-warning: #a96508;

    --color-border: #d9e2ec;

    --radius-small: 6px;
    --radius-button: 8px;
    --radius-card: 18px;

    --shadow-small: 0 4px 14px rgba(23, 32, 51, 0.08);
    --shadow-medium: 0 12px 30px rgba(23, 32, 51, 0.1);

    --container-width: 1180px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--color-text);
    background:
        radial-gradient(
            circle at 10% 5%,
            rgba(15, 157, 145, 0.16) 0,
            rgba(15, 157, 145, 0) 34%
        ),
        radial-gradient(
            circle at 92% 12%,
            rgba(244, 185, 66, 0.17) 0,
            rgba(244, 185, 66, 0) 30%
        ),
        linear-gradient(
            135deg,
            #f7fbff 0%,
            #eef8f6 48%,
            #fff9ed 100%
        );
    font-family:
        Inter,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    font-size: 17px;
    line-height: 1.6;
    text-rendering: optimizeLegibility;
}

img,
svg {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
}

a {
    color: inherit;
}

.container {
    width: min(calc(100% - 32px), var(--container-width));
    margin-inline: auto;
}

.surface {
    background: var(--color-surface);
    border: 1px solid rgba(217, 226, 236, 0.9);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-small);
}

.btn {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 20px;
    border: 2px solid transparent;
    border-radius: var(--radius-button);
    font-weight: 700;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition:
        transform 160ms ease,
        box-shadow 160ms ease,
        background-color 160ms ease,
        border-color 160ms ease;
}

.btn-primary {
    color: #ffffff;
    background: linear-gradient(
        135deg,
        var(--color-secondary) 0%,
        var(--color-secondary-dark) 100%
    );
    box-shadow: 0 6px 16px rgba(15, 157, 145, 0.22);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 9px 20px rgba(15, 157, 145, 0.28);
}

.btn-secondary {
    color: var(--color-primary);
    background: #ffffff;
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: #f2f6fa;
}

.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

h1,
h2,
h3 {
    margin-top: 0;
    color: var(--color-primary);
    line-height: 1.15;
}

p {
    margin-top: 0;
}

.text-muted {
    color: var(--color-text-muted);
}

@media (max-width: 700px) {
    body {
        font-size: 16px;
    }

    .container {
        width: min(calc(100% - 24px), var(--container-width));
    }

    .btn {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

/* =========================================================
   ACCESSIBILITÉ
   ========================================================= */

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1000;
    padding: 10px 16px;
    color: #ffffff;
    background: var(--color-primary);
    border-radius: var(--radius-button);
    text-decoration: none;
    transform: translateY(-150%);
    transition: transform 150ms ease;
}

.skip-link:focus {
    transform: translateY(0);
}

/* =========================================================
   EN-TÊTE
   ========================================================= */

.site-header {
    position: relative;
    z-index: 10;
    background: rgba(255, 255, 255, 0.82);
    border-bottom: 1px solid rgba(217, 226, 236, 0.85);
    backdrop-filter: blur(14px);
}

.site-header__inner {
    display: flex;
    min-height: 82px;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--color-primary);
    text-decoration: none;
}

.brand__symbol {
    display: inline-flex;
    width: 46px;
    height: 46px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
    border-radius: 10px;
    box-shadow: 0 7px 18px rgba(30, 58, 95, 0.18);
    font-size: 24px;
    font-weight: 800;
}

.brand__text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand__text strong {
    font-size: 18px;
}

.brand__text small {
    margin-top: 3px;
    color: var(--color-text-muted);
    font-size: 13px;
}

.main-navigation {
    display: flex;
    align-items: center;
    gap: 26px;
}

.main-navigation > a:not(.btn) {
    color: var(--color-text);
    font-weight: 650;
    text-decoration: none;
}

.main-navigation > a:not(.btn):hover {
    color: var(--color-secondary-dark);
}

.btn-small {
    min-height: 42px;
    padding: 9px 17px;
    font-size: 15px;
}

/* =========================================================
   ACCUEIL
   ========================================================= */

.hero {
    position: relative;
    overflow: hidden;
    padding: 82px 0 88px;
}

.hero::before {
    position: absolute;
    top: -180px;
    right: -160px;
    width: 500px;
    height: 500px;
    background: radial-gradient(
        circle,
        rgba(118, 86, 181, 0.1) 0%,
        rgba(118, 86, 181, 0) 68%
    );
    content: "";
    pointer-events: none;
}

.hero__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
    align-items: center;
    gap: 68px;
}

.hero__content {
    max-width: 660px;
}

.eyebrow {
    margin-bottom: 14px;
    color: var(--color-secondary-dark);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 720px;
    margin-bottom: 24px;
    font-size: clamp(42px, 5.5vw, 66px);
    letter-spacing: -0.035em;
}

.hero h1 span {
    display: block;
    color: var(--color-secondary-dark);
}

.hero__description {
    max-width: 610px;
    margin-bottom: 30px;
    color: var(--color-text-muted);
    font-size: 20px;
    line-height: 1.65;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 30px;
}

.hero__benefits {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    padding: 0;
    margin: 0;
    color: var(--color-text-muted);
    font-size: 15px;
    list-style: none;
}

.hero__benefits li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.hero__benefits span {
    display: inline-flex;
    width: 22px;
    height: 22px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #ffffff;
    background: var(--color-success);
    border-radius: 50%;
    font-size: 13px;
    font-weight: 800;
}

/* =========================================================
   CARTE GÉOMÉTRIQUE
   ========================================================= */

.hero__visual {
    position: relative;
}

.geometry-card {
    position: relative;
    overflow: hidden;
    padding: 24px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.98) 0%,
            rgba(243, 251, 250, 0.98) 52%,
            rgba(255, 249, 235, 0.98) 100%
        );
    box-shadow: var(--shadow-medium);
}

.geometry-card::after {
    position: absolute;
    right: -60px;
    bottom: -80px;
    width: 190px;
    height: 190px;
    background: radial-gradient(
        circle,
        rgba(244, 185, 66, 0.2) 0%,
        rgba(244, 185, 66, 0) 70%
    );
    content: "";
    pointer-events: none;
}

.geometry-card__heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 8px;
}

.subject-label,
.lesson-status {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 750;
}

.subject-label {
    color: #ffffff;
    background: var(--color-secondary-dark);
}

.lesson-status {
    color: var(--color-primary);
    background: rgba(244, 185, 66, 0.24);
}

.triangle-illustration {
    width: 100%;
    min-height: 300px;
}

.triangle-point {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 28px;
    font-weight: 800;
}

.triangle-label {
    fill: var(--color-secondary-dark);
    font-family: Arial, sans-serif;
    font-size: 22px;
    font-weight: 800;
}

.memory-card {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background:
        linear-gradient(
            135deg,
            rgba(255, 246, 220, 0.96) 0%,
            rgba(255, 251, 241, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.42);
    border-radius: 10px;
}

.memory-card__icon {
    flex-shrink: 0;
    font-size: 24px;
}

.memory-card p {
    margin: 0;
    font-size: 15px;
}

/* =========================================================
   SECTIONS
   ========================================================= */

.section-spacing {
    padding: 88px 0;
}

.section-heading {
    max-width: 720px;
    margin: 0 auto 44px;
    text-align: center;
}

.section-heading h2,
.method-section h2,
.first-module h2 {
    margin-bottom: 18px;
    font-size: clamp(32px, 4vw, 46px);
    letter-spacing: -0.025em;
}

.section-heading > p:last-child,
.method-section__intro,
.first-module p {
    color: var(--color-text-muted);
    font-size: 18px;
}

/* =========================================================
   MATIÈRES
   ========================================================= */

.subjects-section {
    background:
        linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.62) 0%,
            rgba(237, 247, 246, 0.7) 100%
        );
    border-top: 1px solid rgba(217, 226, 236, 0.7);
    border-bottom: 1px solid rgba(217, 226, 236, 0.7);
}

.subjects-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.subject-card {
    position: relative;
    display: flex;
    min-height: 360px;
    flex-direction: column;
    justify-content: space-between;
    padding: 28px;
    overflow: hidden;
    transition:
        transform 160ms ease,
        box-shadow 160ms ease;
}

.subject-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.subject-card::before {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 5px;
    content: "";
}

.subject-card--maths::before {
    background: linear-gradient(
        90deg,
        var(--color-secondary) 0%,
        var(--color-secondary-dark) 100%
    );
}

.subject-card--physics::before {
    background: linear-gradient(
        90deg,
        #ef924f 0%,
        var(--color-physics) 100%
    );
}

.subject-card--chemistry::before {
    background: linear-gradient(
        90deg,
        #9a7bd0 0%,
        var(--color-chemistry) 100%
    );
}

.subject-card__icon {
    display: inline-flex;
    width: 58px;
    height: 58px;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    border-radius: 12px;
    font-size: 29px;
    font-weight: 800;
}

.subject-card--maths .subject-card__icon {
    color: var(--color-secondary-dark);
    background: rgba(15, 157, 145, 0.13);
}

.subject-card--physics .subject-card__icon {
    color: var(--color-physics);
    background: rgba(216, 107, 32, 0.13);
}

.subject-card--chemistry .subject-card__icon {
    color: var(--color-chemistry);
    background: rgba(118, 86, 181, 0.13);
}

.subject-card__level {
    margin-bottom: 7px;
    color: var(--color-text-muted);
    font-size: 13px;
    font-weight: 750;
    letter-spacing: 0.035em;
    text-transform: uppercase;
}

.subject-card h3 {
    margin-bottom: 12px;
    font-size: 27px;
}

.subject-card p {
    color: var(--color-text-muted);
}

.subject-card__link {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    gap: 9px;
    color: var(--color-secondary-dark);
    font-weight: 800;
    text-decoration: none;
}

.subject-card__link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.coming-soon {
    display: inline-flex;
    align-self: flex-start;
    padding: 7px 11px;
    color: var(--color-text-muted);
    background: #f1f4f7;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 700;
}

/* =========================================================
   MÉTHODE
   ========================================================= */

.method-section__layout {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(480px, 1.15fr);
    align-items: start;
    gap: 80px;
}

.method-steps {
    display: grid;
    gap: 16px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.method-steps li {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 20px;
    background:
        linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.96) 0%,
            rgba(246, 251, 252, 0.96) 100%
        );
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.method-steps li > span {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
    border-radius: 9px;
    font-weight: 800;
}

.method-steps strong {
    display: block;
    margin-bottom: 3px;
    color: var(--color-primary);
    font-size: 18px;
}

.method-steps p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 15px;
}

/* =========================================================
   PREMIER MODULE
   ========================================================= */

.first-module {
    padding-top: 40px;
}

.first-module__card {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
    align-items: center;
    gap: 70px;
    padding: clamp(32px, 6vw, 70px);
    color: #ffffff;
    background:
        radial-gradient(
            circle at 92% 12%,
            rgba(244, 185, 66, 0.3) 0%,
            rgba(244, 185, 66, 0) 35%
        ),
        linear-gradient(
            135deg,
            var(--color-primary-dark) 0%,
            var(--color-primary) 48%,
            var(--color-secondary-dark) 100%
        );
    border-radius: 18px;
    box-shadow: var(--shadow-medium);
}

.first-module__card h2,
.first-module__card .eyebrow {
    color: #ffffff;
}

.first-module__card > div:first-child > p:not(.eyebrow) {
    color: rgba(255, 255, 255, 0.82);
}

.first-module__card ul {
    padding-left: 22px;
    margin: 24px 0 30px;
}

.first-module__card li {
    margin-bottom: 8px;
}

.first-module__progress {
    padding: 26px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.23);
    border-radius: 12px;
    backdrop-filter: blur(9px);
}

.first-module__progress > span {
    display: block;
    margin-bottom: 15px;
    font-weight: 800;
}

.progress-bar {
    height: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 6px;
}

.progress-bar span {
    display: block;
    height: 100%;
    background:
        linear-gradient(
            90deg,
            var(--color-accent) 0%,
            #ffe29a 100%
        );
    border-radius: inherit;
}

.first-module__progress small {
    color: rgba(255, 255, 255, 0.74);
}

/* =========================================================
   PIED DE PAGE
   ========================================================= */

.site-footer {
    padding: 34px 0;
    color: rgba(255, 255, 255, 0.8);
    background:
        linear-gradient(
            135deg,
            var(--color-primary-dark) 0%,
            #10243d 100%
        );
}

.site-footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.site-footer strong {
    color: #ffffff;
    font-size: 18px;
}

.site-footer p {
    margin: 4px 0 0;
    font-size: 14px;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 980px) {
    .hero__layout,
    .method-section__layout,
    .first-module__card {
        grid-template-columns: 1fr;
    }

    .hero__layout {
        gap: 48px;
    }

    .hero__content {
        max-width: 760px;
    }

    .hero__visual {
        max-width: 650px;
        margin-inline: auto;
    }

    .subjects-grid {
        grid-template-columns: 1fr;
    }

    .subject-card {
        min-height: auto;
    }

    .method-section__layout {
        gap: 36px;
    }

    .first-module__card {
        gap: 38px;
    }
}

@media (max-width: 760px) {
    .site-header__inner {
        min-height: auto;
        flex-direction: column;
        align-items: flex-start;
        padding-top: 16px;
        padding-bottom: 16px;
    }

    .main-navigation {
        width: 100%;
        flex-wrap: wrap;
        gap: 12px 20px;
    }

    .main-navigation .btn {
        width: auto;
    }

    .hero {
        padding: 58px 0 64px;
    }

    .hero h1 {
        font-size: clamp(38px, 11vw, 52px);
    }

    .hero__description {
        font-size: 18px;
    }

    .hero__benefits {
        flex-direction: column;
    }

    .section-spacing {
        padding: 68px 0;
    }

    .geometry-card {
        padding: 17px;
    }

    .geometry-card__heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .triangle-illustration {
        min-height: 230px;
    }

    .site-footer__inner {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 520px) {
    .brand__text small {
        display: none;
    }

    .main-navigation > a:not(.btn) {
        font-size: 14px;
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__actions .btn {
        width: 100%;
    }

    .subject-card {
        padding: 23px;
    }

    .first-module__card {
        padding: 28px 22px;
    }
}

.btn:disabled {
    cursor: not-allowed;
    filter: saturate(0.55);
    box-shadow: none;
    transform: none;
}

.btn:disabled:hover {
    box-shadow: none;
    transform: none;
}

/* =========================================================
   MODULE PYTHAGORE — ANGLE DROIT
   ========================================================= */

.lesson-header {
    position: relative;
    z-index: 10;
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid rgba(217, 226, 236, 0.9);
    backdrop-filter: blur(14px);
}

.lesson-header__inner {
    display: flex;
    min-height: 82px;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.lesson-page {
    min-height: calc(100vh - 82px);
    padding: 34px 0 90px;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 42px;
    color: var(--color-text-muted);
    font-size: 14px;
}

.breadcrumb a {
    color: var(--color-secondary-dark);
    font-weight: 700;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.lesson-introduction {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(250px, 360px);
    align-items: end;
    gap: 60px;
    margin-bottom: 42px;
}

.lesson-introduction__content {
    max-width: 760px;
}

.lesson-introduction h1 {
    margin-bottom: 20px;
    font-size: clamp(38px, 5vw, 58px);
    letter-spacing: -0.035em;
}

.lesson-introduction__content > p:last-child {
    max-width: 700px;
    margin-bottom: 0;
    color: var(--color-text-muted);
    font-size: 19px;
}

.lesson-progress {
    padding: 20px;
    background:
        linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.96) 0%,
            rgba(239, 249, 248, 0.96) 100%
        );
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.lesson-progress__heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 12px;
    color: var(--color-text-muted);
    font-size: 14px;
}

.lesson-progress__heading strong {
    color: var(--color-primary);
    font-size: 16px;
}

.progress-bar--lesson {
    margin-bottom: 0;
    background: #dfe9ed;
}

.progress-bar--lesson span {
    background:
        linear-gradient(
            90deg,
            var(--color-secondary) 0%,
            var(--color-secondary-dark) 100%
        );
}

/* =========================================================
   DÉFINITION
   ========================================================= */

.definition-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    gap: 22px;
    max-width: 930px;
    padding: 28px;
    margin-bottom: 58px;
    background:
        linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.98) 0%,
            rgba(237, 247, 246, 0.98) 100%
        );
}

.definition-card__icon {
    display: inline-flex;
    width: 58px;
    height: 58px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-primary);
    background:
        linear-gradient(
            135deg,
            rgba(244, 185, 66, 0.28) 0%,
            rgba(255, 249, 232, 0.95) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 10px;
    font-size: 33px;
    font-weight: 800;
}

.definition-card__label {
    margin-bottom: 5px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.definition-card h2 {
    margin-bottom: 12px;
    font-size: 28px;
}

.definition-card p {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

.simple-definition {
    margin-top: 18px;
    border-top: 1px solid var(--color-border);
}

.simple-definition summary {
    padding-top: 16px;
    color: var(--color-secondary-dark);
    font-weight: 750;
    cursor: pointer;
}

.simple-definition summary:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.simple-definition p {
    padding: 14px 16px;
    margin-top: 12px;
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.8);
    border-left: 4px solid var(--color-accent);
    border-radius: 6px;
}

/* =========================================================
   EXERCICE INTERACTIF
   ========================================================= */

.interactive-lesson {
    scroll-margin-top: 30px;
}

.interactive-lesson__heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 26px;
}

.interactive-lesson__heading h2 {
    margin-bottom: 12px;
    font-size: clamp(30px, 4vw, 43px);
}

.interactive-lesson__heading p:last-child {
    max-width: 690px;
    margin-bottom: 0;
    color: var(--color-text-muted);
    font-size: 18px;
}

.exercise-badge {
    display: inline-flex;
    min-height: 34px;
    align-items: center;
    flex-shrink: 0;
    padding: 6px 12px;
    color: var(--color-secondary-dark);
    background: rgba(15, 157, 145, 0.12);
    border: 1px solid rgba(15, 157, 145, 0.25);
    border-radius: 7px;
    font-size: 14px;
    font-weight: 800;
}

.angle-exercise {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.14) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.angle-exercise__figure {
    position: relative;
    width: 100%;
    max-width: 700px;
    margin-inline: auto;
    aspect-ratio: 620 / 430;
}

.angle-exercise__figure svg {
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.angle-choice {
    position: absolute;
    display: inline-flex;
    width: 58px;
    height: 58px;
    align-items: center;
    justify-content: center;
    padding: 0;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            #284f7c 100%
        );
    border: 4px solid #ffffff;
    border-radius: 10px;
    box-shadow: 0 7px 18px rgba(23, 32, 51, 0.2);
    font-size: 23px;
    font-weight: 850;
    cursor: pointer;
    transform: translate(-50%, -50%);
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        background-color 150ms ease;
}

.angle-choice:hover {
    transform: translate(-50%, -50%) scale(1.07);
    box-shadow: 0 10px 22px rgba(23, 32, 51, 0.25);
}

.angle-choice--a {
    top: 80%;
    left: 22%;
}

.angle-choice--b {
    top: 17%;
    left: 22%;
}

.angle-choice--c {
    top: 80%;
    left: 84%;
}

.angle-choice--correct {
    color: #ffffff;
    background: var(--color-success);
    box-shadow:
        0 0 0 5px rgba(35, 139, 87, 0.2),
        0 8px 20px rgba(35, 139, 87, 0.28);
}

.angle-choice--incorrect {
    color: #ffffff;
    background: var(--color-error);
    box-shadow:
        0 0 0 5px rgba(196, 61, 75, 0.18),
        0 8px 20px rgba(196, 61, 75, 0.25);
}

.angle-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.angle-exercise__help {
    align-self: center;
    padding: 26px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.angle-exercise__step {
    margin-bottom: 7px;
    color: var(--color-warning);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.angle-exercise__help h3 {
    margin-bottom: 14px;
    font-size: 24px;
}

.angle-exercise__help > p:not(.angle-exercise__step) {
    color: var(--color-text-muted);
}

.right-angle-example {
    position: relative;
    width: 115px;
    height: 115px;
    margin: 24px auto;
    border-bottom: 8px solid var(--color-primary);
    border-left: 8px solid var(--color-primary);
}

.right-angle-example span {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 42px;
    height: 42px;
    border-top: 8px solid var(--color-accent);
    border-right: 8px solid var(--color-accent);
}

.angle-exercise__encouragement {
    padding-top: 16px;
    margin-bottom: 0;
    border-top: 1px solid rgba(169, 101, 8, 0.22);
    font-size: 14px;
}

/* =========================================================
   RETOUR PÉDAGOGIQUE
   ========================================================= */

.lesson-feedback {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 18px;
    padding: 24px;
    margin-top: 24px;
    border: 2px solid transparent;
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.lesson-feedback[hidden] {
    display: none;
}

.lesson-feedback--success {
    background:
        linear-gradient(
            135deg,
            rgba(234, 248, 239, 0.98) 0%,
            rgba(248, 253, 250, 0.98) 100%
        );
    border-color: rgba(35, 139, 87, 0.42);
}

.lesson-feedback--error {
    background:
        linear-gradient(
            135deg,
            rgba(255, 239, 241, 0.98) 0%,
            rgba(255, 249, 250, 0.98) 100%
        );
    border-color: rgba(196, 61, 75, 0.38);
}

.lesson-feedback__icon {
    display: inline-flex;
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #ffffff;
    border-radius: 9px;
    font-size: 24px;
    font-weight: 900;
}

.lesson-feedback--success .lesson-feedback__icon {
    background: var(--color-success);
}

.lesson-feedback--success .lesson-feedback__icon::before {
    content: "✓";
}

.lesson-feedback--error .lesson-feedback__icon {
    background: var(--color-error);
}

.lesson-feedback--error .lesson-feedback__icon::before {
    content: "!";
}

.lesson-feedback h3 {
    margin-bottom: 7px;
    font-size: 22px;
}

.lesson-feedback p {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

.lesson-feedback__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

/* =========================================================
   PHRASE À RETENIR
   ========================================================= */

.memory-section {
    padding-top: 60px;
    scroll-margin-top: 30px;
}

.memory-section__card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 24px;
    padding: clamp(28px, 5vw, 52px);
    color: #ffffff;
    background:
        radial-gradient(
            circle at 92% 15%,
            rgba(244, 185, 66, 0.3) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            135deg,
            var(--color-primary-dark) 0%,
            var(--color-primary) 52%,
            var(--color-secondary-dark) 100%
        );
    border-radius: 16px;
    box-shadow: var(--shadow-medium);
}

.memory-section__icon {
    display: inline-flex;
    width: 76px;
    height: 76px;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 12px;
    font-size: 38px;
}

.memory-section__card .eyebrow,
.memory-section__card h2 {
    color: #ffffff;
}

.memory-section__card h2 {
    margin-bottom: 12px;
    font-size: clamp(28px, 4vw, 42px);
}

.memory-section__card p:last-child {
    margin-bottom: 0;
    color: rgba(255, 255, 255, 0.82);
}

/* =========================================================
   RESPONSIVE — MODULE PYTHAGORE
   ========================================================= */

@media (max-width: 980px) {
    .lesson-introduction,
    .angle-exercise {
        grid-template-columns: 1fr;
    }

    .lesson-introduction {
        align-items: start;
        gap: 28px;
    }

    .lesson-progress {
        max-width: 500px;
    }

    .angle-exercise__help {
        max-width: 620px;
    }
}

@media (max-width: 700px) {
    .lesson-header__inner {
        min-height: auto;
        padding-top: 14px;
        padding-bottom: 14px;
    }

    .lesson-header__inner > .btn {
        width: auto;
    }

    .lesson-page {
        padding-top: 24px;
    }

    .breadcrumb {
        margin-bottom: 30px;
    }

    .lesson-introduction h1 {
        font-size: clamp(36px, 10vw, 48px);
    }

    .definition-card {
        grid-template-columns: 1fr;
        padding: 22px;
    }

    .interactive-lesson__heading {
        flex-direction: column;
        gap: 14px;
    }

    .angle-exercise {
        padding: 20px 14px;
    }

    .angle-choice {
        width: 50px;
        height: 50px;
        border-width: 3px;
        font-size: 20px;
    }

    .lesson-feedback {
        grid-template-columns: 1fr;
    }

    .lesson-feedback__actions {
        flex-direction: column;
    }

    .lesson-feedback__actions .btn {
        width: 100%;
    }

    .memory-section__card {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .lesson-header__inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .lesson-header__inner > .btn {
        width: 100%;
    }

    .angle-exercise__figure {
        width: calc(100% + 12px);
        margin-left: -6px;
    }

    .angle-choice {
        width: 46px;
        height: 46px;
    }

    .angle-exercise__help {
        padding: 22px;
    }

    .memory-section {
        padding-top: 42px;
    }
}

[hidden] {
    display: none !important;
}

/* =========================================================
   MODULE PYTHAGORE — HYPOTÉNUSE
   ========================================================= */

.hypotenuse-exercise__figure {
    position: relative;
    width: 100%;
    max-width: 700px;
    margin-inline: auto;
    aspect-ratio: 620 / 430;
}

.hypotenuse-exercise__figure svg {
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.thales-side-choice {
    position: absolute;
    z-index: 2;
    display: inline-flex;
    min-width: 66px;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            #284f7c 100%
        );
    border: 4px solid #ffffff;
    border-radius: 9px;
    box-shadow: 0 7px 18px rgba(23, 32, 51, 0.22);
    font-size: 19px;
    font-weight: 850;
    cursor: pointer;
    transform: translate(-50%, -50%);
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        background-color 150ms ease;
}

.thales-side-choice:hover {
    transform: translate(-50%, -50%) scale(1.07);
    box-shadow: 0 10px 23px rgba(23, 32, 51, 0.27);
}

.thales-side-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.thales-side-choice--ab {
    top: 49%;
    left: 22%;
}

.thales-side-choice--ac {
    top: 80%;
    left: 53%;
}

.thales-side-choice--bc {
    top: 42%;
    left: 58%;
}

.thales-side-choice--correct {
    color: #ffffff;
    background: var(--color-success);
    box-shadow:
        0 0 0 5px rgba(35, 139, 87, 0.2),
        0 8px 20px rgba(35, 139, 87, 0.28);
}

.thales-side-choice--incorrect {
    color: #ffffff;
    background: var(--color-error);
    box-shadow:
        0 0 0 5px rgba(196, 61, 75, 0.18),
        0 8px 20px rgba(196, 61, 75, 0.25);
}

.hypotenuse-method {
    display: grid;
    gap: 14px;
    padding: 0;
    margin: 22px 0;
    counter-reset: hypotenuse-step;
    list-style: none;
}

.hypotenuse-method li {
    position: relative;
    min-height: 38px;
    padding-left: 48px;
    color: var(--color-text);
    counter-increment: hypotenuse-step;
}

.hypotenuse-method li::before {
    position: absolute;
    top: -2px;
    left: 0;
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
    border-radius: 8px;
    content: counter(hypotenuse-step);
    font-size: 15px;
    font-weight: 850;
}

@media (max-width: 700px) {
    .thales-side-choice {
        min-width: 56px;
        min-height: 44px;
        padding: 7px 11px;
        border-width: 3px;
        font-size: 17px;
    }
}

@media (max-width: 480px) {
    .hypotenuse-exercise__figure {
        width: calc(100% + 12px);
        margin-left: -6px;
    }

    .thales-side-choice--ab {
        left: 23%;
    }

    .thales-side-choice--ac {
        left: 54%;
    }

    .thales-side-choice--bc {
        top: 40%;
        left: 59%;
    }
}

.memory-section__actions {
    margin-top: 22px;
}

.memory-section__actions .btn {
    align-self: flex-start;
}

/* =========================================================
   MODULE PYTHAGORE — FORMULE
   ========================================================= */

.formula-discovery {
    margin-top: 56px;
}

.formula-discovery__heading {
    max-width: 720px;
    margin-bottom: 28px;
}

.formula-discovery__heading h2 {
    margin-top: 8px;
}

.formula-discovery__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
    gap: 24px;
    align-items: stretch;
}

.formula-triangle-card,
.formula-explanation {
    padding: clamp(24px, 4vw, 38px);
}

.formula-triangle-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.formula-triangle-card svg {
    display: block;
    width: 100%;
    height: auto;
}

.formula-side-label {
    fill: var(--color-primary);
    font-size: 24px;
    font-weight: 850;
    paint-order: stroke;
    stroke: #ffffff;
    stroke-width: 7px;
    stroke-linejoin: round;
}

.formula-side-label--hypotenuse {
    fill: var(--color-secondary-dark);
    font-size: 27px;
}

.formula-triangle-card__legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 22px;
    justify-content: center;
    margin-top: 14px;
    color: var(--color-text);
    font-size: 15px;
    font-weight: 700;
}

.formula-triangle-card__legend span {
    display: inline-flex;
    gap: 9px;
    align-items: center;
}

.formula-legend-dot {
    display: inline-block;
    width: 14px;
    height: 14px;
    flex: 0 0 14px;
    border-radius: 4px;
}

.formula-legend-dot--angle {
    background: var(--color-accent);
}

.formula-legend-dot--hypotenuse {
    background: var(--color-secondary);
}

.formula-explanation {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 22px;
}

.formula-explanation__step {
    display: grid;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 15px;
    align-items: start;
}

.formula-explanation__step > span {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
    border-radius: 9px;
    font-size: 17px;
    font-weight: 850;
}

.formula-explanation__step h3 {
    margin: 0 0 5px;
    color: var(--color-primary);
    font-size: 18px;
}

.formula-explanation__step p {
    margin: 0;
}

.formula-equation {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: center;
    padding: 22px 18px;
    margin-top: 4px;
    color: var(--color-primary);
    background:
        linear-gradient(
            135deg,
            rgba(15, 157, 145, 0.11) 0%,
            rgba(244, 185, 66, 0.16) 100%
        );
    border: 2px solid rgba(15, 157, 145, 0.22);
    border-radius: 14px;
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 850;
    line-height: 1.25;
}

.formula-equation strong {
    color: var(--color-secondary-dark);
}

.formula-equation sup,
.formula-choice__equation sup {
    position: relative;
    top: -0.15em;
    font-size: 0.62em;
}

.formula-equation__hypotenuse {
    padding: 5px 10px;
    color: #ffffff;
    background: var(--color-secondary-dark);
    border-radius: 8px;
}

.formula-exercise {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
    gap: 28px;
    padding: clamp(24px, 4vw, 38px);
}

.formula-choice-list {
    display: grid;
    gap: 14px;
}

.formula-choice {
    display: grid;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 16px;
    width: 100%;
    align-items: center;
    padding: 17px 20px;
    color: var(--color-primary);
    text-align: left;
    background: #ffffff;
    border: 2px solid rgba(30, 58, 95, 0.16);
    border-radius: 12px;
    box-shadow: 0 5px 16px rgba(23, 32, 51, 0.07);
    cursor: pointer;
    transition:
        transform 150ms ease,
        border-color 150ms ease,
        box-shadow 150ms ease,
        background-color 150ms ease;
}

.formula-choice:hover {
    transform: translateY(-2px);
    border-color: var(--color-secondary);
    box-shadow: 0 9px 22px rgba(23, 32, 51, 0.11);
}

.formula-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 3px;
}

.formula-choice__letter {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-primary);
    border-radius: 8px;
    font-size: 17px;
    font-weight: 850;
}

.formula-choice__equation {
    font-size: clamp(20px, 3vw, 27px);
    font-weight: 800;
    line-height: 1.3;
}

.formula-choice--correct {
    color: #165f3c;
    background: rgba(35, 139, 87, 0.09);
    border-color: var(--color-success);
    box-shadow: 0 0 0 4px rgba(35, 139, 87, 0.12);
}

.formula-choice--correct .formula-choice__letter {
    background: var(--color-success);
}

.formula-choice--incorrect {
    color: #8e2935;
    background: rgba(196, 61, 75, 0.08);
    border-color: var(--color-error);
    box-shadow: 0 0 0 4px rgba(196, 61, 75, 0.1);
}

.formula-choice--incorrect .formula-choice__letter {
    background: var(--color-error);
}

.formula-reminder {
    align-self: stretch;
    padding: 26px;
    background:
        linear-gradient(
            145deg,
            rgba(30, 58, 95, 0.96) 0%,
            rgba(15, 157, 145, 0.95) 100%
        );
    border-radius: 16px;
    color: #ffffff;
}

.formula-reminder .angle-exercise__step {
    color: #ffffff;
    opacity: 0.84;
}

.formula-reminder h3 {
    margin: 8px 0 14px;
    color: #ffffff;
    font-size: clamp(21px, 3vw, 27px);
}

.formula-reminder p {
    color: rgba(255, 255, 255, 0.92);
}

.formula-reminder__example {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    padding: 18px 14px;
    margin-top: 24px;
    color: var(--color-primary);
    text-align: center;
    background: #ffffff;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 800;
}

.formula-reminder__example strong {
    color: var(--color-secondary-dark);
    font-size: 24px;
}

@media (max-width: 920px) {
    .formula-discovery__grid,
    .formula-exercise {
        grid-template-columns: 1fr;
    }

    .formula-triangle-card {
        max-width: 720px;
        width: 100%;
        margin-inline: auto;
    }
}

@media (max-width: 600px) {
    .formula-discovery {
        margin-top: 42px;
    }

    .formula-triangle-card,
    .formula-explanation,
    .formula-exercise {
        padding: 22px 18px;
    }

    .formula-choice {
        grid-template-columns: 40px minmax(0, 1fr);
        gap: 12px;
        padding: 15px 14px;
    }

    .formula-choice__letter {
        width: 38px;
        height: 38px;
    }

    .formula-triangle-card__legend {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 420px) {
    .formula-equation {
        gap: 7px;
        padding-inline: 10px;
    }

    .formula-reminder__example {
        grid-template-columns: 1fr;
    }

    .formula-reminder__example strong {
        line-height: 1;
    }
}

/* Distinction entre le symbole de l’angle droit et la puissance 2 */

.square-warning {
    padding: clamp(24px, 4vw, 38px);
    margin-top: 32px;
    border: 2px solid rgba(244, 185, 66, 0.48);
    background:
        linear-gradient(
            135deg,
            rgba(255, 249, 231, 0.98) 0%,
            rgba(240, 252, 250, 0.98) 100%
        );
}

.square-warning__heading {
    max-width: 820px;
    margin-bottom: 24px;
}

.square-warning__label {
    margin: 0 0 8px;
    color: var(--color-warning);
    font-size: 14px;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.square-warning__heading h2 {
    margin: 0;
    color: var(--color-primary);
    font-size: clamp(23px, 3vw, 32px);
}

.square-warning__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.square-meaning {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
    padding: 20px;
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid rgba(30, 58, 95, 0.12);
    border-radius: 14px;
}

.square-meaning__symbol {
    display: inline-flex;
    width: 58px;
    height: 58px;
    align-items: center;
    justify-content: center;
    border-radius: 11px;
    font-size: 34px;
    font-weight: 850;
}

.square-meaning__symbol--angle {
    color: var(--color-primary);
    background: rgba(244, 185, 66, 0.24);
    border: 2px solid var(--color-accent);
}

.square-meaning__symbol--power {
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
}

.square-meaning h3 {
    margin: 2px 0 8px;
    color: var(--color-primary);
    font-size: 19px;
}

.square-meaning p {
    margin: 0;
}

.square-warning__conclusion {
    padding: 16px 18px;
    margin: 20px 0 0;
    color: var(--color-primary);
    background: rgba(244, 185, 66, 0.17);
    border-left: 5px solid var(--color-accent);
    border-radius: 0 10px 10px 0;
    font-weight: 750;
}

@media (max-width: 700px) {
    .square-warning__grid {
        grid-template-columns: 1fr;
    }

    .square-meaning {
        grid-template-columns: 54px minmax(0, 1fr);
        padding: 17px;
    }

    .square-meaning__symbol {
        width: 50px;
        height: 50px;
        font-size: 29px;
    }
}

/* =========================================================
   MODULE PYTHAGORE — CALCUL GUIDÉ
   ========================================================= */

.guided-problem {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
    gap: clamp(28px, 5vw, 56px);
    align-items: center;
    padding: clamp(26px, 5vw, 48px);
    margin-top: 34px;
}

.guided-problem__figure {
    width: 100%;
    max-width: 680px;
    margin-inline: auto;
}

.guided-problem__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.guided-side-label {
    fill: var(--color-primary);
    font-size: 25px;
    font-weight: 850;
    paint-order: stroke;
    stroke: #ffffff;
    stroke-width: 8px;
    stroke-linejoin: round;
}

.guided-side-label--unknown {
    fill: var(--color-secondary-dark);
    font-size: 28px;
}

.guided-problem__statement h2 {
    margin: 8px 0 16px;
    color: var(--color-primary);
    font-size: clamp(27px, 4vw, 40px);
}

.guided-problem__statement ul {
    display: grid;
    gap: 10px;
    padding-left: 23px;
    margin: 20px 0;
}

.guided-problem__statement li::marker {
    color: var(--color-secondary);
}

.guided-problem__goal {
    display: grid;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 13px;
    align-items: center;
    padding: 17px 19px;
    margin-top: 24px;
    color: var(--color-primary);
    background: rgba(244, 185, 66, 0.18);
    border-left: 5px solid var(--color-accent);
    border-radius: 0 12px 12px 0;
}

.guided-problem__goal span {
    font-size: 28px;
}

.guided-problem__goal p {
    margin: 0;
}

.guided-calculation {
    margin-top: 56px;
}

.guided-calculation__heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(250px, 360px);
    gap: 28px;
    align-items: end;
    margin-bottom: 28px;
}

.guided-calculation__heading h2 {
    margin: 8px 0 0;
}

.guided-calculation__progress {
    padding: 18px 20px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(30, 58, 95, 0.12);
    border-radius: 14px;
    box-shadow: 0 6px 18px rgba(23, 32, 51, 0.06);
}

.guided-calculation__progress > div:first-child {
    display: flex;
    gap: 16px;
    justify-content: space-between;
    margin-bottom: 10px;
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 750;
}

.guided-step {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    gap: clamp(20px, 4vw, 34px);
    padding: clamp(25px, 5vw, 44px);
    border-top: 5px solid var(--color-secondary);
}

.guided-step__number {
    display: inline-flex;
    width: 64px;
    height: 64px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
    border-radius: 14px;
    box-shadow: 0 8px 20px rgba(15, 157, 145, 0.2);
    font-size: 27px;
    font-weight: 900;
}

.guided-step__content {
    min-width: 0;
}

.guided-step__label {
    margin: 0 0 6px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.guided-step__content h3 {
    margin: 0 0 12px;
    color: var(--color-primary);
    font-size: clamp(24px, 3vw, 32px);
}

.guided-step__content h3:focus {
    outline: none;
}

.guided-step__question {
    margin: 24px 0 15px;
    color: var(--color-primary);
    font-size: 18px;
    font-weight: 800;
}

.guided-choice-list {
    display: grid;
    gap: 13px;
    margin-top: 23px;
}

.guided-choice-list--compact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.guided-choice {
    width: 100%;
    min-height: 60px;
    padding: 15px 18px;
    color: var(--color-primary);
    text-align: center;
    background: #ffffff;
    border: 2px solid rgba(30, 58, 95, 0.18);
    border-radius: 11px;
    box-shadow: 0 5px 15px rgba(23, 32, 51, 0.07);
    font: inherit;
    font-size: 18px;
    font-weight: 850;
    cursor: pointer;
    transition:
        transform 150ms ease,
        border-color 150ms ease,
        background-color 150ms ease,
        box-shadow 150ms ease;
}

.guided-choice:hover {
    transform: translateY(-2px);
    border-color: var(--color-secondary);
    box-shadow: 0 9px 22px rgba(23, 32, 51, 0.11);
}

.guided-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 3px;
}

.guided-choice--formula {
    min-height: 68px;
    font-size: clamp(19px, 3vw, 25px);
}

.guided-choice--correct {
    color: #165f3c;
    background: rgba(35, 139, 87, 0.1);
    border-color: var(--color-success);
    box-shadow: 0 0 0 4px rgba(35, 139, 87, 0.12);
}

.guided-choice--incorrect {
    color: #8e2935;
    background: rgba(196, 61, 75, 0.08);
    border-color: var(--color-error);
    box-shadow: 0 0 0 4px rgba(196, 61, 75, 0.1);
}

.guided-feedback {
    padding: 20px 22px;
    margin-top: 22px;
    border-radius: 13px;
}

.guided-feedback:focus {
    outline: none;
}

.guided-feedback h4 {
    margin: 0 0 7px;
    font-size: 19px;
}

.guided-feedback p {
    margin: 0;
}

.guided-feedback .btn {
    margin-top: 18px;
}

.guided-feedback--success {
    color: #165f3c;
    background: rgba(35, 139, 87, 0.1);
    border-left: 5px solid var(--color-success);
}

.guided-feedback--error {
    color: #8e2935;
    background: rgba(196, 61, 75, 0.09);
    border-left: 5px solid var(--color-error);
}

.guided-square-reminder {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 22px 0;
}

.guided-square-reminder p {
    padding: 18px;
    margin: 0;
    color: var(--color-primary);
    text-align: center;
    background:
        linear-gradient(
            135deg,
            rgba(15, 157, 145, 0.1) 0%,
            rgba(244, 185, 66, 0.16) 100%
        );
    border: 1px solid rgba(15, 157, 145, 0.2);
    border-radius: 12px;
    font-size: clamp(19px, 3vw, 25px);
}

.guided-root-explanation {
    display: grid;
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 18px;
    align-items: center;
    padding: 20px;
    margin: 22px 0;
    color: var(--color-primary);
    background: rgba(244, 185, 66, 0.16);
    border: 2px solid rgba(244, 185, 66, 0.42);
    border-radius: 14px;
}

.guided-root-explanation > span {
    display: inline-flex;
    width: 60px;
    height: 60px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-primary);
    border-radius: 11px;
    font-size: 38px;
    font-weight: 850;
}

.guided-root-explanation p {
    margin: 0;
}

.guided-completion {
    display: grid;
    grid-template-columns: 82px minmax(0, 1fr);
    gap: 25px;
    padding: clamp(28px, 5vw, 48px);
    margin-top: 28px;
    color: var(--color-primary);
    background:
        linear-gradient(
            135deg,
            rgba(223, 247, 244, 0.98) 0%,
            rgba(255, 244, 216, 0.98) 100%
        );
    border: 2px solid rgba(35, 139, 87, 0.3);
    border-radius: 18px;
    box-shadow: 0 12px 34px rgba(23, 32, 51, 0.09);
}

.guided-completion__icon {
    display: inline-flex;
    width: 74px;
    height: 74px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-success);
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(35, 139, 87, 0.24);
    font-size: 38px;
    font-weight: 900;
}

.guided-completion h2 {
    margin: 7px 0 18px;
    color: var(--color-primary);
    font-size: clamp(29px, 4vw, 42px);
}

.guided-completion__calculation {
    display: grid;
    gap: 6px;
    max-width: 440px;
    padding: 21px;
    margin-bottom: 22px;
    background: rgba(255, 255, 255, 0.84);
    border-radius: 13px;
    font-size: clamp(18px, 3vw, 23px);
    font-weight: 750;
}

.guided-completion__calculation p {
    margin: 0;
}

.guided-completion__calculation p:last-child {
    padding-top: 9px;
    margin-top: 5px;
    color: var(--color-success);
    border-top: 2px solid rgba(35, 139, 87, 0.18);
    font-size: 1.15em;
}

@media (max-width: 900px) {
    .guided-problem,
    .guided-calculation__heading {
        grid-template-columns: 1fr;
    }

    .guided-calculation__progress {
        max-width: 500px;
    }
}

@media (max-width: 650px) {
    .guided-problem {
        padding: 23px 18px;
    }

    .guided-step {
        grid-template-columns: 1fr;
        padding: 24px 18px;
    }

    .guided-step__number {
        width: 52px;
        height: 52px;
        border-radius: 11px;
        font-size: 22px;
    }

    .guided-choice-list--compact,
    .guided-square-reminder {
        grid-template-columns: 1fr;
    }

    .guided-completion {
        grid-template-columns: 1fr;
        padding: 27px 20px;
    }

    .guided-completion__icon {
        width: 62px;
        height: 62px;
        font-size: 31px;
    }
}

@media (max-width: 440px) {
    .guided-root-explanation {
        grid-template-columns: 52px minmax(0, 1fr);
        gap: 13px;
        padding: 16px;
    }

    .guided-root-explanation > span {
        width: 48px;
        height: 48px;
        font-size: 31px;
    }

    .guided-calculation__progress > div:first-child {
        align-items: flex-start;
        flex-direction: column;
        gap: 3px;
    }
}

/* =========================================================
   PYTHAGORE — POURQUOI ET QUAND L’UTILISER
   ========================================================= */

.use-introduction {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
    gap: clamp(34px, 6vw, 74px);
    align-items: center;
    padding: clamp(30px, 5vw, 58px);
    margin-top: 28px;
    background:
        linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.96) 0%,
            rgba(223, 247, 244, 0.92) 100%
        );
    border: 1px solid rgba(30, 58, 95, 0.1);
    border-radius: 22px;
    box-shadow: 0 18px 48px rgba(23, 32, 51, 0.08);
}

.use-introduction__content h1 {
    max-width: 720px;
    margin: 10px 0 18px;
    color: var(--color-primary);
    font-size: clamp(37px, 5vw, 62px);
    line-height: 1.06;
}

.use-introduction__lead {
    max-width: 650px;
    color: var(--color-text);
    font-size: clamp(18px, 2.3vw, 22px);
    line-height: 1.7;
}

.use-introduction__answer {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 15px;
    align-items: center;
    padding: 19px 21px;
    margin-top: 26px;
    color: var(--color-primary);
    background: rgba(244, 185, 66, 0.18);
    border-left: 5px solid var(--color-accent);
    border-radius: 0 13px 13px 0;
}

.use-introduction__answer span {
    font-size: 31px;
}

.use-introduction__answer p {
    margin: 0;
}

.use-introduction__visual {
    padding: 18px;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid rgba(30, 58, 95, 0.1);
    border-radius: 18px;
}

.use-introduction__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.use-introduction__visual p {
    max-width: 610px;
    padding: 14px 16px 4px;
    margin: 0 auto;
    color: var(--color-primary);
    text-align: center;
    font-weight: 750;
}

.use-cases,
.use-conditions,
.use-limits,
.use-game {
    margin-top: 70px;
}

.use-section-heading {
    max-width: 820px;
    margin-bottom: 30px;
}

.use-section-heading h2 {
    margin: 9px 0 12px;
    color: var(--color-primary);
    font-size: clamp(29px, 4vw, 43px);
    line-height: 1.15;
}

.use-section-heading > p:last-child {
    max-width: 720px;
    margin-bottom: 0;
    font-size: 18px;
}

.use-cases__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.use-example-card {
    display: flex;
    min-width: 0;
    flex-direction: column;
    overflow: hidden;
    transition:
        transform 170ms ease,
        box-shadow 170ms ease;
}

.use-example-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 18px 38px rgba(23, 32, 51, 0.12);
}

.use-example-card__visual {
    padding: 17px 17px 0;
    background:
        linear-gradient(
            145deg,
            rgba(223, 247, 244, 0.55) 0%,
            rgba(255, 244, 216, 0.55) 100%
        );
}

.use-example-card__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.use-example-card__content {
    position: relative;
    flex: 1;
    padding: 25px;
}

.use-example-card__number {
    position: absolute;
    top: -24px;
    right: 22px;
    display: inline-flex;
    width: 50px;
    height: 50px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
    border: 4px solid #ffffff;
    border-radius: 12px;
    box-shadow: 0 7px 17px rgba(23, 32, 51, 0.17);
    font-size: 14px;
    font-weight: 900;
}

.use-example-card h3 {
    margin: 0 0 11px;
    color: var(--color-primary);
    font-size: 22px;
}

.use-example-card p {
    margin: 0;
}

.use-conditions {
    padding: clamp(28px, 5vw, 50px);
    background:
        linear-gradient(
            135deg,
            rgba(30, 58, 95, 0.97) 0%,
            rgba(15, 157, 145, 0.95) 100%
        );
    border-radius: 22px;
    box-shadow: 0 18px 44px rgba(23, 32, 51, 0.13);
}

.use-conditions .eyebrow,
.use-conditions .use-section-heading h2,
.use-conditions .use-section-heading p {
    color: #ffffff;
}

.use-conditions .use-section-heading p {
    opacity: 0.9;
}

.use-conditions__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.use-condition-card {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
    padding: 23px;
    background: rgba(255, 255, 255, 0.96);
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(5, 25, 43, 0.12);
}

.use-condition-card__number {
    display: inline-flex;
    width: 52px;
    height: 52px;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    background: var(--color-accent);
    border-radius: 12px;
    font-size: 22px;
    font-weight: 900;
}

.use-condition-card h3 {
    margin: 1px 0 8px;
    color: var(--color-primary);
    font-size: 19px;
}

.use-condition-card p {
    margin: 0;
}

.use-rule-summary {
    display: grid;
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 16px;
    align-items: center;
    padding: 20px 23px;
    margin-top: 22px;
    color: var(--color-primary);
    background: #ffffff;
    border: 3px solid rgba(244, 185, 66, 0.75);
    border-radius: 15px;
}

.use-rule-summary__icon {
    display: inline-flex;
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-success);
    border-radius: 50%;
    font-size: 25px;
    font-weight: 900;
}

.use-rule-summary p {
    margin: 0;
    font-size: 17px;
}

.use-limits__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.use-limit-card {
    overflow: hidden;
    border-top: 5px solid var(--color-error);
}

.use-limit-card__visual {
    padding: 17px 17px 0;
    background: rgba(196, 61, 75, 0.035);
}

.use-limit-card__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.use-limit-card__content {
    padding: 24px;
}

.use-limit-card h3 {
    margin: 0 0 10px;
    color: var(--color-primary);
    font-size: 21px;
}

.use-limit-card p {
    margin: 0;
}

@media (max-width: 1020px) {
    .use-introduction {
        grid-template-columns: 1fr;
    }

    .use-introduction__visual {
        max-width: 760px;
        width: 100%;
        margin-inline: auto;
    }

    .use-cases__grid,
    .use-conditions__grid,
    .use-limits__grid {
        grid-template-columns: 1fr;
    }

    .use-example-card,
    .use-limit-card {
        display: grid;
        grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
        align-items: center;
    }

    .use-example-card__number {
        top: 18px;
    }
}

@media (max-width: 660px) {
    .use-introduction {
        padding: 26px 18px;
        border-radius: 17px;
    }

    .use-introduction__answer {
        grid-template-columns: 42px minmax(0, 1fr);
        padding: 16px;
    }

    .use-introduction__answer span {
        font-size: 26px;
    }

    .use-cases,
    .use-conditions,
    .use-limits,
    .use-game {
        margin-top: 50px;
    }

    .use-conditions {
        padding: 28px 18px;
    }

    .use-example-card,
    .use-limit-card {
        display: block;
    }

    .use-example-card__number {
        top: -24px;
    }

    .use-condition-card {
        grid-template-columns: 50px minmax(0, 1fr);
        padding: 19px;
    }

    .use-condition-card__number {
        width: 46px;
        height: 46px;
    }

    .use-rule-summary {
        grid-template-columns: 46px minmax(0, 1fr);
        padding: 17px;
    }

    .use-rule-summary__icon {
        width: 42px;
        height: 42px;
    }
}

/* Jeu : Pythagore, oui ou non ? */

.use-game__heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
    gap: 28px;
    align-items: end;
    margin-bottom: 30px;
}

.use-game__heading h2 {
    margin: 9px 0 12px;
    color: var(--color-primary);
    font-size: clamp(30px, 4vw, 44px);
}

.use-game__heading p:last-child {
    max-width: 720px;
    margin-bottom: 0;
    font-size: 18px;
}

.use-game__progress {
    padding: 18px 20px;
    background: rgba(255, 255, 255, 0.84);
    border: 1px solid rgba(30, 58, 95, 0.12);
    border-radius: 14px;
    box-shadow: 0 7px 20px rgba(23, 32, 51, 0.07);
}

.use-game__progress > div:first-child {
    display: flex;
    gap: 16px;
    justify-content: space-between;
    margin-bottom: 10px;
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 800;
}

.use-game__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
}

.use-case-card {
    position: relative;
    overflow: hidden;
    border-top: 5px solid var(--color-primary);
    transition:
        transform 170ms ease,
        border-color 170ms ease,
        box-shadow 170ms ease;
}

.use-case-card--solved {
    border-top-color: var(--color-success);
    box-shadow:
        0 0 0 3px rgba(35, 139, 87, 0.1),
        0 15px 34px rgba(23, 32, 51, 0.1);
}

.use-case-card__number {
    position: absolute;
    z-index: 2;
    top: 17px;
    left: 17px;
    padding: 7px 11px;
    color: #ffffff;
    background: var(--color-primary);
    border-radius: 8px;
    box-shadow: 0 5px 14px rgba(23, 32, 51, 0.18);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.use-case-card--solved .use-case-card__number {
    background: var(--color-success);
}

.use-case-card__visual {
    padding: 42px 15px 0;
    background:
        linear-gradient(
            145deg,
            rgba(223, 247, 244, 0.48) 0%,
            rgba(255, 244, 216, 0.48) 100%
        );
}

.use-case-card__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.use-case-card__content {
    padding: 24px;
}

.use-case-card__content h3 {
    margin: 0 0 10px;
    color: var(--color-primary);
    font-size: 21px;
}

.use-case-card__content > p {
    min-height: 76px;
    margin: 0;
}

.use-case-card__answers {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 21px;
}

.use-case-answer {
    min-height: 52px;
    padding: 12px 16px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid rgba(30, 58, 95, 0.19);
    border-radius: 9px;
    font: inherit;
    font-size: 17px;
    font-weight: 850;
    cursor: pointer;
    transition:
        transform 150ms ease,
        border-color 150ms ease,
        background-color 150ms ease,
        box-shadow 150ms ease;
}

.use-case-answer:hover:not(:disabled) {
    transform: translateY(-2px);
    border-color: var(--color-secondary);
    box-shadow: 0 7px 17px rgba(23, 32, 51, 0.1);
}

.use-case-answer:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 3px;
}

.use-case-answer:disabled {
    cursor: default;
}

.use-case-answer--correct {
    color: #165f3c;
    background: rgba(35, 139, 87, 0.11);
    border-color: var(--color-success);
    box-shadow: 0 0 0 4px rgba(35, 139, 87, 0.11);
}

.use-case-answer--incorrect {
    color: #8e2935;
    background: rgba(196, 61, 75, 0.09);
    border-color: var(--color-error);
    box-shadow: 0 0 0 4px rgba(196, 61, 75, 0.09);
}

.situation-feedback {
    padding: 17px 18px;
    margin-top: 18px;
    border-radius: 11px;
}

.situation-feedback:focus {
    outline: none;
}

.situation-feedback h4 {
    margin: 0 0 6px;
    font-size: 17px;
}

.situation-feedback p {
    margin: 0;
    font-size: 15px;
}

.situation-feedback--success {
    color: #165f3c;
    background: rgba(35, 139, 87, 0.1);
    border-left: 5px solid var(--color-success);
}

.situation-feedback--error {
    color: #8e2935;
    background: rgba(196, 61, 75, 0.09);
    border-left: 5px solid var(--color-error);
}

.use-game-completion {
    display: grid;
    grid-template-columns: 80px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    padding: clamp(28px, 5vw, 44px);
    margin-top: 28px;
    color: var(--color-primary);
    background:
        linear-gradient(
            135deg,
            rgba(223, 247, 244, 0.98) 0%,
            rgba(255, 244, 216, 0.98) 100%
        );
    border: 2px solid rgba(35, 139, 87, 0.32);
    border-radius: 18px;
    box-shadow: 0 13px 34px rgba(23, 32, 51, 0.09);
}

.use-game-completion__icon {
    display: inline-flex;
    width: 72px;
    height: 72px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-success);
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(35, 139, 87, 0.24);
    font-size: 36px;
    font-weight: 900;
}

.use-game-completion h2 {
    margin: 8px 0 12px;
    color: var(--color-primary);
    font-size: clamp(27px, 4vw, 39px);
}

.use-game-completion p {
    max-width: 720px;
}

.use-game-completion .btn {
    margin-top: 8px;
}

/* Résumé final */

.use-final-summary {
    display: grid;
    grid-template-columns: minmax(230px, 0.65fr) minmax(0, 1.35fr);
    gap: clamp(28px, 6vw, 68px);
    align-items: center;
    padding: clamp(30px, 6vw, 58px);
    margin: 70px 0 20px;
    color: #ffffff;
    background:
        linear-gradient(
            135deg,
            var(--color-primary) 0%,
            var(--color-secondary-dark) 100%
        );
    border-radius: 22px;
    box-shadow: 0 18px 46px rgba(23, 32, 51, 0.17);
}

.use-final-summary__visual {
    position: relative;
    display: grid;
    gap: 17px;
    justify-content: center;
}

.use-final-summary__visual::before {
    position: absolute;
    z-index: 0;
    top: 35px;
    bottom: 35px;
    left: 50%;
    width: 5px;
    background: rgba(255, 255, 255, 0.28);
    border-radius: 4px;
    content: "";
    transform: translateX(-50%);
}

.use-final-summary__visual span {
    position: relative;
    z-index: 1;
    display: inline-flex;
    width: 76px;
    height: 76px;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    background: var(--color-accent);
    border: 6px solid rgba(255, 255, 255, 0.96);
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(5, 25, 43, 0.2);
    font-size: 29px;
    font-weight: 900;
}

.use-final-summary .eyebrow,
.use-final-summary h2,
.use-final-summary p,
.use-final-summary li {
    color: #ffffff;
}

.use-final-summary h2 {
    margin: 9px 0 20px;
    font-size: clamp(30px, 4vw, 43px);
}

.use-final-summary ol {
    display: grid;
    gap: 12px;
    padding-left: 25px;
    margin: 0 0 22px;
}

.use-final-summary li {
    padding-left: 5px;
    font-size: 18px;
    font-weight: 700;
}

.use-final-summary li::marker {
    color: var(--color-accent);
    font-weight: 900;
}

.use-final-summary__conclusion {
    padding: 16px 18px;
    margin-bottom: 23px;
    color: var(--color-primary) !important;
    background: #ffffff;
    border-left: 5px solid var(--color-accent);
    border-radius: 0 11px 11px 0;
    font-weight: 850;
}

.use-final-summary .btn-primary {
    color: var(--color-primary);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.use-final-summary .btn-primary:hover {
    background: #ffd06d;
    border-color: #ffd06d;
}

@media (max-width: 1020px) {
    .use-game__grid {
        grid-template-columns: 1fr;
    }

    .use-case-card {
        display: grid;
        grid-template-columns: minmax(270px, 0.85fr) minmax(0, 1.15fr);
        align-items: center;
    }

    .use-case-card__content > p {
        min-height: 0;
    }
}

@media (max-width: 800px) {
    .use-game__heading,
    .use-final-summary {
        grid-template-columns: 1fr;
    }

    .use-game__progress {
        max-width: 500px;
    }

    .use-final-summary__visual {
        grid-template-columns: repeat(3, auto);
        gap: 20px;
    }

    .use-final-summary__visual::before {
        top: 50%;
        right: 35px;
        bottom: auto;
        left: 35px;
        width: auto;
        height: 5px;
        transform: translateY(-50%);
    }
}

@media (max-width: 660px) {
    .use-case-card {
        display: block;
    }

    .use-case-card__content {
        padding: 21px 18px;
    }

    .use-game-completion {
        grid-template-columns: 1fr;
        padding: 27px 20px;
    }

    .use-game-completion__icon {
        width: 62px;
        height: 62px;
        font-size: 30px;
    }

    .use-final-summary {
        padding: 30px 20px;
        margin-top: 50px;
    }

    .use-final-summary__visual span {
        width: 61px;
        height: 61px;
        border-width: 4px;
        font-size: 23px;
    }
}

@media (max-width: 420px) {
    .use-game__progress > div:first-child {
        align-items: flex-start;
        flex-direction: column;
        gap: 3px;
    }

    .use-case-card__answers {
        grid-template-columns: 1fr;
    }

    .use-final-summary__visual {
        gap: 10px;
    }

    .use-final-summary__visual span {
        width: 54px;
        height: 54px;
    }
}

/* =========================================================
   MODULE THALÈS — DÉCOUVERTE ET PARALLÈLES
   ========================================================= */

.thales-mission {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
    align-items: center;
    gap: 58px;
    margin-bottom: 76px;
}

.thales-mission__content h1 {
    margin-bottom: 20px;
    font-size: clamp(40px, 5vw, 60px);
    letter-spacing: -0.035em;
}

.thales-mission__lead {
    color: var(--color-text-muted);
    font-size: 19px;
}

.thales-mission__goal {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
    margin: 26px 0;
    background: rgba(244, 185, 66, 0.14);
    border: 1px solid rgba(244, 185, 66, 0.4);
    border-radius: 10px;
}

.thales-mission__goal span {
    font-size: 26px;
}

.thales-mission__goal p {
    margin: 0;
}

.thales-mission__visual {
    padding: 22px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.98) 0%,
            rgba(239, 249, 248, 0.98) 100%
        );
}

.thales-mission__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.thales-mission__visual > p {
    margin: 12px 10px 4px;
    color: var(--color-text-muted);
    font-size: 15px;
    text-align: center;
}

.thales-ray {
    stroke: #f4b942;
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 12 12;
}

.thales-ground {
    stroke: #1e3a5f;
    stroke-width: 8;
    stroke-linecap: round;
}

.thales-shadow {
    stroke: #67829f;
    stroke-width: 13;
    stroke-linecap: round;
}

.thales-stick {
    stroke: #0f9d91;
    stroke-width: 14;
    stroke-linecap: round;
}

.thales-visual-label,
.thales-ray-label {
    fill: #1e3a5f;
    font-family: Arial, sans-serif;
    font-weight: 800;
}

.thales-visual-label {
    font-size: 20px;
}

.thales-ray-label {
    font-size: 17px;
}

.thales-clues {
    margin-bottom: 72px;
}

.thales-clues__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.thales-clue {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
}

.thales-clue__number {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #ffffff;
    background: linear-gradient(
        135deg,
        var(--color-primary) 0%,
        var(--color-secondary) 100%
    );
    border-radius: 9px;
    font-weight: 850;
}

.thales-clue h3 {
    margin-bottom: 7px;
    font-size: 21px;
}

.thales-clue p {
    margin: 0;
    color: var(--color-text-muted);
}

.parallel-game {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(270px, 0.6fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.14) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.parallel-game__choices {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.parallel-choice {
    display: flex;
    min-height: 250px;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 12px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.parallel-choice:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.parallel-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.parallel-choice svg {
    width: 100%;
    max-width: 210px;
}

.parallel-choice svg line {
    stroke: var(--color-primary);
    stroke-width: 11;
    stroke-linecap: round;
}

.parallel-choice__letter {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-primary);
    border-radius: 8px;
}

.parallel-choice--correct {
    background: rgba(234, 248, 239, 0.9);
    border-color: var(--color-success);
    box-shadow: 0 0 0 4px rgba(35, 139, 87, 0.15);
}

.parallel-choice--incorrect {
    background: rgba(255, 239, 241, 0.9);
    border-color: var(--color-error);
    box-shadow: 0 0 0 4px rgba(196, 61, 75, 0.13);
}

.parallel-game__hint {
    align-self: center;
    padding: 26px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.parallel-game__hint h3 {
    margin-bottom: 14px;
    font-size: 24px;
}

.parallel-game__hint > p:not(.angle-exercise__step) {
    color: var(--color-text-muted);
}

.parallel-symbol {
    display: grid;
    gap: 24px;
    width: 150px;
    margin: 28px auto;
}

.parallel-symbol span {
    display: block;
    height: 9px;
    background: var(--color-primary);
    border-radius: 5px;
}

@media (max-width: 980px) {
    .thales-mission,
    .parallel-game {
        grid-template-columns: 1fr;
    }

    .thales-mission {
        gap: 36px;
    }

    .thales-mission__visual {
        max-width: 720px;
        margin-inline: auto;
    }

    .thales-clues__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .parallel-game {
        padding: 24px;
    }

    .parallel-game__choices {
        grid-template-columns: 1fr;
    }

    .parallel-choice {
        min-height: 210px;
    }
}

@media (max-width: 520px) {
    .thales-mission {
        grid-template-columns: minmax(0, 1fr);
    }

    .thales-mission__visual {
        padding: 12px;
    }

    .parallel-game {
        padding: 18px;
    }
}

/* =========================================================
   MODULE THALÈS — ALIGNEMENTS
   ========================================================= */

.alignment-game {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(270px, 0.65fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.14) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.alignment-game__main {
    min-width: 0;
}

.alignment-figure {
    width: 100%;
    max-width: 760px;
    margin: 0 auto 24px;
}

.alignment-figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.alignment-line {
    stroke: var(--color-primary);
    stroke-width: 9;
    stroke-linecap: round;
}

.alignment-point {
    fill: var(--color-secondary-dark);
}

.alignment-label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 27px;
    font-weight: 850;
}

.alignment-answers {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.alignment-answer {
    display: flex;
    min-height: 150px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 18px 14px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 11px;
    font: inherit;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.alignment-answer:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.alignment-answer:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.alignment-answer > span {
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.alignment-answer strong {
    font-size: 20px;
}

.alignment-answer--correct {
    background: rgba(234, 248, 239, 0.92);
    border-color: var(--color-success);
    box-shadow: 0 0 0 4px rgba(35, 139, 87, 0.15);
}

.alignment-answer--incorrect {
    background: rgba(255, 239, 241, 0.92);
    border-color: var(--color-error);
    box-shadow: 0 0 0 4px rgba(196, 61, 75, 0.13);
}

.alignment-game__hint {
    align-self: center;
    padding: 26px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.alignment-game__hint h3 {
    margin-bottom: 14px;
    font-size: 24px;
}

.alignment-game__hint > p:not(.angle-exercise__step) {
    color: var(--color-text-muted);
}

.beads-on-line {
    position: relative;
    display: flex;
    width: 180px;
    align-items: center;
    justify-content: space-between;
    margin: 34px auto;
}

.beads-on-line span {
    position: absolute;
    right: 0;
    left: 0;
    height: 8px;
    background: var(--color-primary);
    border-radius: 4px;
}

.beads-on-line i {
    position: relative;
    z-index: 1;
    display: block;
    width: 26px;
    height: 26px;
    background: var(--color-accent);
    border: 5px solid #ffffff;
    border-radius: 50%;
    box-shadow: 0 3px 8px rgba(23, 32, 51, 0.18);
}

@media (max-width: 980px) {
    .alignment-game {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .alignment-game {
        padding: 24px;
    }

    .alignment-answers {
        grid-template-columns: 1fr;
    }

    .alignment-answer {
        min-height: 125px;
    }
}

@media (max-width: 520px) {
    .alignment-game {
        padding: 18px;
    }
}

/* =========================================================
   MODULE THALÈS — DEUX TRIANGLES
   ========================================================= */

.triangle-pair-game {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(310px, 0.75fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.14) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.triangle-pair-game__figure {
    min-width: 0;
}

.triangle-pair-game__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.triangle-pair__large {
    fill: rgba(255, 255, 255, 0.55);
    stroke: var(--color-primary);
    stroke-width: 9;
    stroke-linejoin: round;
    transition:
        fill 180ms ease,
        stroke-width 180ms ease;
}

.triangle-pair__small {
    stroke: var(--color-secondary-dark);
    stroke-width: 8;
    stroke-linejoin: round;
    transition:
        filter 180ms ease,
        stroke-width 180ms ease;
}

.triangle-pair__parallel {
    stroke: var(--color-secondary-dark);
    stroke-width: 9;
    stroke-linecap: round;
}

.triangle-pair__point {
    fill: var(--color-primary);
}

.triangle-pair__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 28px;
    font-weight: 850;
}

.triangle-pair__parallel-mark {
    fill: none;
    stroke: var(--color-accent);
    stroke-width: 6;
    stroke-linecap: round;
}

.triangle-pair__small--found {
    stroke-width: 13;
    filter: drop-shadow(0 0 10px rgba(15, 157, 145, 0.42));
}

.triangle-pair__large--found {
    fill: rgba(244, 185, 66, 0.18);
    stroke-width: 13;
}

.triangle-size-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px 28px;
    margin-top: 14px;
    color: var(--color-text-muted);
    font-size: 14px;
    font-weight: 750;
}

.triangle-size-legend span {
    display: inline-flex;
    align-items: center;
    gap: 9px;
}

.triangle-size-legend i {
    display: block;
    width: 27px;
    height: 18px;
    border-radius: 4px;
}

.triangle-size-legend__small {
    background: #bfeee7;
    border: 2px solid var(--color-secondary-dark);
}

.triangle-size-legend__large {
    background: rgba(244, 185, 66, 0.18);
    border: 2px solid var(--color-primary);
}

.triangle-pair-game__challenge {
    align-self: center;
}

.triangle-question {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.triangle-question[hidden] {
    display: none;
}

.triangle-question__step {
    margin-bottom: 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.triangle-question h3 {
    margin-bottom: 20px;
    font-size: 25px;
}

.triangle-question__answers {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.triangle-name-choice {
    min-height: 58px;
    padding: 10px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 19px;
    font-weight: 850;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.triangle-name-choice:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.triangle-name-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.triangle-name-choice--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.triangle-name-choice--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.triangle-question__feedback {
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
}

.triangle-question__feedback:focus {
    outline: none;
}

.triangle-question__feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.triangle-question__feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.triangle-pair-game__hint {
    padding: 22px;
    margin-top: 18px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.triangle-pair-game__hint h3 {
    margin-bottom: 11px;
    font-size: 22px;
}

.triangle-pair-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 980px) {
    .triangle-pair-game {
        grid-template-columns: 1fr;
    }

    .triangle-pair-game__figure {
        max-width: 760px;
        margin-inline: auto;
    }
}

@media (max-width: 760px) {
    .triangle-pair-game {
        padding: 24px;
    }
}

@media (max-width: 520px) {
    .triangle-pair-game {
        padding: 18px;
    }

    .triangle-question {
        padding: 20px;
    }

    .triangle-question__answers {
        grid-template-columns: 1fr;
    }
}

/* =========================================================
   MODULE THALÈS — CÔTÉS CORRESPONDANTS
   ========================================================= */

.side-matching-game {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.14) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.side-matching-game__figure {
    min-width: 0;
}

.side-matching-game__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.side-segment line {
    stroke: transparent;
    stroke-width: 17;
    stroke-linecap: round;
    transition:
        stroke 180ms ease,
        filter 180ms ease;
}

.side-segment--one .side-segment--matched {
    stroke: #0f9d91;
    filter: drop-shadow(0 0 5px rgba(15, 157, 145, 0.35));
}

.side-segment--two .side-segment--matched {
    stroke: #d47a20;
    filter: drop-shadow(0 0 5px rgba(212, 122, 32, 0.3));
}

.side-segment--three .side-segment--matched {
    stroke: #7656b5;
    filter: drop-shadow(0 0 5px rgba(118, 86, 181, 0.3));
}

.matching-point {
    fill: var(--color-primary);
}

.matching-label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 28px;
    font-weight: 850;
}

.matching-pair-marker circle {
    stroke: #ffffff;
    stroke-width: 5;
}

.matching-pair-marker text {
    fill: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 20px;
    font-weight: 900;
    text-anchor: middle;
}

.matching-pair-marker--one circle {
    fill: #0f9d91;
}

.matching-pair-marker--two circle {
    fill: #d47a20;
}

.matching-pair-marker--three circle {
    fill: #7656b5;
}

.side-matching-game__figure-caption {
    margin: 12px 0 0;
    color: var(--color-text-muted);
    font-size: 14px;
    text-align: center;
}

.side-matching-game__challenge {
    align-self: center;
}

.side-question {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.side-question[hidden] {
    display: none;
}

.side-question__step {
    margin-bottom: 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.side-question h3 {
    margin-bottom: 20px;
    font-size: 25px;
}

.side-question__answers {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.thales-side-choice {
    min-height: 60px;
    padding: 10px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 19px;
    font-weight: 850;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.thales-side-choice:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.thales-side-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.thales-side-choice--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.thales-side-choice--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.side-question__feedback {
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
}

.side-question__feedback:focus {
    outline: none;
}

.side-question__feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.side-question__feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.side-matching-game__hint {
    padding: 22px;
    margin-top: 18px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.side-matching-game__hint h3 {
    margin-bottom: 11px;
    font-size: 22px;
}

.side-matching-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 980px) {
    .side-matching-game {
        grid-template-columns: 1fr;
    }

    .side-matching-game__figure {
        max-width: 760px;
        margin-inline: auto;
    }
}

@media (max-width: 760px) {
    .side-matching-game {
        padding: 24px;
    }
}

@media (max-width: 520px) {
    .side-matching-game {
        padding: 18px;
    }

    .side-question {
        padding: 20px;
    }

    .side-question__answers {
        grid-template-columns: 1fr;
    }
}


/* Correction locale : empêche les réponses Thalès de se superposer */
.side-question__answers {
    position: relative;
    z-index: 2;
}

.side-question__feedback {
    position: static;
    display: block;
    width: 100%;
    clear: both;
    box-sizing: border-box;
}


/* =========================================================
   CORRECTION ISOLÉE — RÉPONSES CÔTÉS THALÈS
   ========================================================= */

.thales-match-question {
    position: relative !important;
    display: block !important;
    width: 100% !important;
    min-width: 0 !important;
    padding: 26px !important;
    overflow: visible !important;
    background: #ffffff !important;
    border: 1px solid var(--color-border) !important;
    border-radius: 12px !important;
    box-shadow: var(--shadow-small) !important;
    box-sizing: border-box !important;
}

.thales-match-question[hidden] {
    display: none !important;
}

.thales-match-question__step {
    position: static !important;
    display: block !important;
    margin: 0 0 7px !important;
    color: var(--color-secondary-dark) !important;
    font-size: 13px !important;
    font-weight: 850 !important;
    letter-spacing: 0.06em !important;
    text-transform: uppercase !important;
}

.thales-match-question h3 {
    position: static !important;
    display: block !important;
    margin: 0 0 20px !important;
    font-size: 25px !important;
    line-height: 1.25 !important;
}

.thales-match-options {
    position: static !important;
    z-index: auto !important;
    display: grid !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: 10px !important;
    width: 100% !important;
    min-width: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: visible !important;
    box-sizing: border-box !important;
}

.thales-match-option {
    position: static !important;
    inset: auto !important;
    display: inline-flex !important;
    width: 100% !important;
    min-width: 0 !important;
    min-height: 60px !important;
    align-items: center !important;
    justify-content: center !important;
    float: none !important;
    padding: 10px !important;
    margin: 0 !important;
    color: var(--color-primary) !important;
    background: #ffffff !important;
    border: 2px solid var(--color-border) !important;
    border-radius: 9px !important;
    box-shadow: none !important;
    font: inherit !important;
    font-size: 19px !important;
    font-weight: 850 !important;
    line-height: 1 !important;
    text-align: center !important;
    cursor: pointer !important;
    transform: none !important;
    box-sizing: border-box !important;
}

.thales-match-option:hover:not(:disabled) {
    transform: translateY(-2px) !important;
    box-shadow: var(--shadow-small) !important;
}

.thales-match-option:focus-visible {
    outline: 4px solid var(--color-accent) !important;
    outline-offset: 4px !important;
}

.thales-match-option--correct {
    color: #17663f !important;
    background: rgba(234, 248, 239, 0.95) !important;
    border-color: var(--color-success) !important;
}

.thales-match-option--incorrect {
    color: #8f2632 !important;
    background: rgba(255, 239, 241, 0.95) !important;
    border-color: var(--color-error) !important;
}

.thales-match-feedback {
    position: static !important;
    display: block !important;
    width: 100% !important;
    clear: both !important;
    padding: 12px 14px !important;
    margin: 16px 0 0 !important;
    border-radius: 8px !important;
    font-size: 14px !important;
    font-weight: 750 !important;
    box-sizing: border-box !important;
}

.thales-match-feedback[hidden] {
    display: none !important;
}

.thales-match-feedback:focus {
    outline: none !important;
}

.thales-match-feedback--success {
    color: #17663f !important;
    background: rgba(234, 248, 239, 0.95) !important;
    border-left: 4px solid var(--color-success) !important;
}

.thales-match-feedback--error {
    color: #8f2632 !important;
    background: rgba(255, 239, 241, 0.95) !important;
    border-left: 4px solid var(--color-error) !important;
}

@media (max-width: 520px) {
    .thales-match-question {
        padding: 20px !important;
    }

    .thales-match-options {
        grid-template-columns: 1fr !important;
    }
}

/* =========================================================
   MODULE THALÈS — PUZZLE DE FORMULE
   ========================================================= */

.thales-formula-game {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.85fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.14) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.thales-formula-game__board {
    align-self: center;
    padding: 32px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.98) 0%,
            rgba(237, 247, 246, 0.98) 100%
        );
    border: 1px solid var(--color-border);
    border-radius: 14px;
}

.thales-formula-game__rule {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 11px;
    margin: 0 0 28px;
    color: var(--color-text-muted);
    font-size: 15px;
}

.thales-formula-game__rule strong {
    color: var(--color-secondary-dark);
    text-transform: uppercase;
}

.thales-formula {
    display: grid;
    grid-template-columns: minmax(90px, 1fr) auto minmax(90px, 1fr) auto minmax(90px, 1fr);
    align-items: center;
    gap: 18px;
}

.thales-formula__fraction {
    display: grid;
    grid-template-rows: auto 5px auto;
    gap: 10px;
    min-width: 0;
    padding: 20px 16px;
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 12px;
    transition:
        border-color 160ms ease,
        box-shadow 160ms ease,
        background 160ms ease;
}

.thales-formula__numerator,
.thales-formula__denominator {
    display: block;
    color: var(--color-primary);
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 900;
    line-height: 1;
    text-align: center;
}

.thales-formula__denominator {
    color: var(--color-text-muted);
}

.thales-formula__bar {
    display: block;
    width: 100%;
    height: 5px;
    background: var(--color-primary);
    border-radius: 3px;
}

.thales-formula__equals {
    color: var(--color-primary);
    font-size: 34px;
    font-weight: 900;
}

.thales-formula__fraction--active {
    background: rgba(255, 248, 226, 0.95);
    border-color: var(--color-accent);
    box-shadow: 0 0 0 5px rgba(244, 185, 66, 0.16);
}

.thales-formula__fraction--completed {
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.thales-formula__fraction--completed .thales-formula__denominator {
    color: #17663f;
}

.thales-formula-pairs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 26px;
}

.thales-formula-pairs span {
    padding: 8px 11px;
    color: var(--color-primary);
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 14px;
}

.thales-formula-game__challenge {
    align-self: center;
}

.thales-formula-question {
    position: relative;
    display: block;
    width: 100%;
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
    box-sizing: border-box;
}

.thales-formula-question[hidden] {
    display: none;
}

.thales-formula-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.thales-formula-question h3 {
    margin: 0 0 20px;
    font-size: 25px;
    line-height: 1.25;
}

.thales-formula-options {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    width: 100%;
}

.thales-formula-option {
    position: static;
    display: inline-flex;
    width: 100%;
    min-width: 0;
    min-height: 60px;
    align-items: center;
    justify-content: center;
    padding: 10px;
    margin: 0;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    box-shadow: none;
    font: inherit;
    font-size: 19px;
    font-weight: 850;
    cursor: pointer;
    box-sizing: border-box;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.thales-formula-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.thales-formula-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.thales-formula-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.thales-formula-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.thales-formula-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.thales-formula-feedback[hidden] {
    display: none;
}

.thales-formula-feedback:focus {
    outline: none;
}

.thales-formula-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.thales-formula-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.thales-formula-game__hint {
    padding: 22px;
    margin-top: 18px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.thales-formula-game__hint h3 {
    margin-bottom: 11px;
    font-size: 22px;
}

.thales-formula-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 980px) {
    .thales-formula-game {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 680px) {
    .thales-formula {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .thales-formula__equals {
        transform: rotate(90deg);
        text-align: center;
    }
}

@media (max-width: 520px) {
    .thales-formula-game {
        padding: 18px;
    }

    .thales-formula-game__board,
    .thales-formula-question {
        padding: 20px;
    }

    .thales-formula-options {
        grid-template-columns: 1fr;
    }
}

/* =========================================================
   MODULE THALÈS — CALCUL GUIDÉ
   ========================================================= */

.thales-guided-game {
    display: grid;
    grid-template-columns: minmax(0, 1.16fr) minmax(350px, 0.84fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.14) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.thales-guided-game__visual {
    min-width: 0;
}

.thales-guided-game__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.guided-point {
    fill: var(--color-primary);
}

.guided-label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 28px;
    font-weight: 850;
}

.guided-measure rect {
    fill: #ffffff;
    stroke: var(--color-secondary-dark);
    stroke-width: 3;
}

.guided-measure text {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 18px;
    font-weight: 850;
    text-anchor: middle;
}

.guided-measure .guided-measure__unknown {
    fill: #fff4d8;
    stroke: var(--color-accent);
}

.guided-measure .guided-measure__unknown-text {
    fill: #9b620b;
}

.guided-parallel-mark {
    fill: none;
    stroke: var(--color-accent);
    stroke-width: 6;
    stroke-linecap: round;
}

.thales-guided-notebook {
    padding: 22px;
    margin-top: 20px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-left: 6px solid var(--color-secondary-dark);
    border-radius: 11px;
    box-shadow: var(--shadow-small);
}

.thales-guided-notebook__title {
    margin: 0 0 12px;
    color: var(--color-secondary-dark);
    font-size: 14px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.thales-guided-notebook ol {
    padding-left: 25px;
    margin: 0;
}

.thales-guided-notebook li {
    padding: 7px 9px;
    margin-bottom: 7px;
    color: var(--color-primary);
    background: rgba(237, 247, 246, 0.8);
    border-radius: 6px;
    font-size: 17px;
    font-weight: 800;
}

.thales-guided-notebook li[hidden] {
    display: none;
}

.thales-guided-notebook__empty {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 14px;
}

.thales-guided-notebook__empty[hidden] {
    display: none;
}

.thales-guided-game__challenge {
    align-self: center;
}

.thales-guided-question {
    position: relative;
    display: block;
    width: 100%;
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
    box-sizing: border-box;
}

.thales-guided-question[hidden] {
    display: none;
}

.thales-guided-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.thales-guided-question h3 {
    margin: 0 0 20px;
    font-size: 25px;
    line-height: 1.25;
}

.thales-guided-question__context {
    padding: 12px 14px;
    margin: -4px 0 18px;
    color: var(--color-text-muted);
    background: rgba(237, 247, 246, 0.75);
    border-radius: 8px;
}

.thales-guided-options {
    display: grid;
    gap: 10px;
    width: 100%;
}

.thales-guided-option {
    position: static;
    display: flex;
    width: 100%;
    min-width: 0;
    min-height: 58px;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    margin: 0;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    box-shadow: none;
    font: inherit;
    font-size: 16px;
    font-weight: 820;
    line-height: 1.3;
    text-align: center;
    cursor: pointer;
    box-sizing: border-box;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.thales-guided-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.thales-guided-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.thales-guided-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.thales-guided-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.thales-guided-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.thales-guided-feedback[hidden] {
    display: none;
}

.thales-guided-feedback:focus {
    outline: none;
}

.thales-guided-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.thales-guided-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.thales-guided-game__hint {
    padding: 22px;
    margin-top: 18px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.thales-guided-game__hint h3 {
    margin-bottom: 11px;
    font-size: 22px;
}

.thales-guided-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 980px) {
    .thales-guided-game {
        grid-template-columns: 1fr;
    }

    .thales-guided-game__visual {
        max-width: 780px;
        margin-inline: auto;
    }
}

@media (max-width: 520px) {
    .thales-guided-game {
        padding: 18px;
    }

    .thales-guided-question {
        padding: 20px;
    }

    .thales-guided-notebook li {
        font-size: 15px;
    }
}

/* =========================================================
   MODULE THALÈS — DÉFI FINAL
   ========================================================= */

.thales-final-game {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
    gap: 34px;
    padding: 34px;
    background:
        radial-gradient(
            circle at 90% 8%,
            rgba(244, 185, 66, 0.16) 0%,
            rgba(244, 185, 66, 0) 34%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(242, 250, 249, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.thales-final-game__visual {
    min-width: 0;
}

.thales-final-game__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.final-point {
    fill: var(--color-primary);
}

.final-label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 28px;
    font-weight: 850;
}

.final-measure rect {
    fill: #ffffff;
    stroke: var(--color-secondary-dark);
    stroke-width: 3;
}

.final-measure text {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 18px;
    font-weight: 850;
    text-anchor: middle;
}

.final-measure .final-measure__unknown {
    fill: #fff4d8;
    stroke: var(--color-accent);
}

.final-measure .final-measure__unknown-text {
    fill: #9b620b;
}

.final-parallel-mark {
    fill: none;
    stroke: var(--color-accent);
    stroke-width: 6;
    stroke-linecap: round;
}

.thales-final-progress {
    padding: 22px;
    margin-top: 20px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-left: 6px solid var(--color-secondary-dark);
    border-radius: 11px;
    box-shadow: var(--shadow-small);
}

.thales-final-progress__title {
    margin: 0 0 12px;
    color: var(--color-secondary-dark);
    font-size: 14px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.thales-final-progress ol {
    padding-left: 25px;
    margin: 0;
}

.thales-final-progress li {
    padding: 7px 9px;
    margin-bottom: 7px;
    color: var(--color-primary);
    background: rgba(237, 247, 246, 0.8);
    border-radius: 6px;
    font-size: 16px;
    font-weight: 780;
}

.thales-final-progress li[hidden],
.thales-final-progress__empty[hidden] {
    display: none;
}

.thales-final-progress__empty {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 14px;
}

.thales-final-game__challenge {
    align-self: center;
}

.thales-final-question {
    position: relative;
    display: block;
    width: 100%;
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
    box-sizing: border-box;
}

.thales-final-question[hidden] {
    display: none;
}

.thales-final-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.thales-final-question h3 {
    margin: 0 0 20px;
    font-size: 25px;
    line-height: 1.25;
}

.thales-final-options {
    display: grid;
    gap: 10px;
    width: 100%;
}

.thales-final-option {
    position: static;
    display: flex;
    width: 100%;
    min-width: 0;
    min-height: 58px;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    margin: 0;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    box-shadow: none;
    font: inherit;
    font-size: 16px;
    font-weight: 820;
    line-height: 1.3;
    text-align: center;
    cursor: pointer;
    box-sizing: border-box;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.thales-final-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.thales-final-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.thales-final-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.thales-final-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.thales-final-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.thales-final-feedback[hidden] {
    display: none;
}

.thales-final-feedback:focus {
    outline: none;
}

.thales-final-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.thales-final-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.thales-final-hint {
    margin-top: 18px;
    border-top: 1px solid var(--color-border);
}

.thales-final-hint summary {
    padding-top: 16px;
    color: var(--color-secondary-dark);
    font-weight: 800;
    cursor: pointer;
}

.thales-final-hint p {
    padding: 12px 14px;
    margin: 12px 0 0;
    color: var(--color-text-muted);
    background: rgba(255, 247, 224, 0.8);
    border-left: 4px solid var(--color-accent);
    border-radius: 8px;
}

.thales-final-summary {
    margin-top: 56px;
}

.thales-final-summary__card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 26px;
    padding: clamp(30px, 5vw, 54px);
    color: #ffffff;
    background:
        radial-gradient(
            circle at 90% 10%,
            rgba(244, 185, 66, 0.3) 0%,
            rgba(244, 185, 66, 0) 35%
        ),
        linear-gradient(
            135deg,
            var(--color-primary-dark) 0%,
            var(--color-primary) 52%,
            var(--color-secondary-dark) 100%
        );
    border-radius: 18px;
    box-shadow: var(--shadow-medium);
}

.thales-final-summary__badge {
    display: inline-flex;
    width: 72px;
    height: 72px;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 14px;
    font-size: 36px;
}

.thales-final-summary h2,
.thales-final-summary .eyebrow {
    color: #ffffff;
}

.thales-final-summary ol {
    padding-left: 22px;
    margin: 22px 0;
}

.thales-final-summary li {
    margin-bottom: 9px;
}

.thales-final-summary__formula {
    display: inline-block;
    padding: 12px 16px;
    color: var(--color-primary);
    background: #ffffff;
    border-radius: 9px;
    font-size: 20px;
    font-weight: 900;
}

@media (max-width: 980px) {
    .thales-final-game {
        grid-template-columns: 1fr;
    }

    .thales-final-game__visual {
        max-width: 780px;
        margin-inline: auto;
    }
}

@media (max-width: 620px) {
    .thales-final-summary__card {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .thales-final-game {
        padding: 18px;
    }

    .thales-final-question {
        padding: 20px;
    }

    .thales-final-progress li {
        font-size: 14px;
    }
}


/* =========================================================
   ACCUEIL — MODULES DE MATHÉMATIQUES
   ========================================================= */

.modules-section {
    padding-top: 54px;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.module-card {
    position: relative;
    display: flex;
    min-height: 520px;
    flex-direction: column;
    justify-content: space-between;
    gap: 28px;
    padding: 32px;
    overflow: hidden;
    transition:
        transform 160ms ease,
        box-shadow 160ms ease;
}

.module-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.module-card::before {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 6px;
    content: "";
    background:
        linear-gradient(
            90deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
}

.module-card--pythagore::before {
    background:
        linear-gradient(
            90deg,
            var(--color-primary) 0%,
            var(--color-secondary) 100%
        );
}

.module-card--thales::before {
    background:
        linear-gradient(
            90deg,
            var(--color-secondary) 0%,
            var(--color-accent) 100%
        );
}

.module-card--reciproque::before {
    background:
        linear-gradient(
            90deg,
            var(--color-accent) 0%,
            var(--color-secondary-dark) 100%
        );
}


.module-card--trigonometrie::before {
    background:
        linear-gradient(
            90deg,
            var(--color-accent) 0%,
            var(--color-primary) 100%
        );
}

.module-card--proportionnalite::before {
    background:
        linear-gradient(
            90deg,
            var(--color-secondary) 0%,
            var(--color-accent) 100%
        );
}

.module-card--equations::before {
    background:
        linear-gradient(
            90deg,
            var(--color-primary) 0%,
            var(--color-secondary-dark) 100%
        );
}

.module-card--calcul-litteral::before {
    background:
        linear-gradient(
            90deg,
            var(--color-secondary-dark) 0%,
            var(--color-accent) 100%
        );
}

.module-card--fonctions::before {
    background:
        linear-gradient(
            90deg,
            var(--color-secondary) 0%,
            var(--color-primary) 100%
        );
}

.module-card__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.module-card__icon {
    display: inline-flex;
    width: 62px;
    height: 62px;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    background:
        linear-gradient(
            135deg,
            rgba(223, 247, 244, 0.95) 0%,
            rgba(255, 244, 216, 0.95) 100%
        );
    border: 1px solid var(--color-border);
    border-radius: 13px;
    font-size: 34px;
    font-weight: 900;
}


.module-card--trigonometrie .module-card__icon {
    color: #7040b3;
    background:
        linear-gradient(
            135deg,
            rgba(244, 239, 255, 0.98) 0%,
            rgba(255, 244, 216, 0.95) 100%
        );
}

.module-card__status {
    display: inline-flex;
    min-height: 34px;
    align-items: center;
    padding: 6px 12px;
    color: var(--color-secondary-dark);
    background: rgba(15, 157, 145, 0.12);
    border: 1px solid rgba(15, 157, 145, 0.24);
    border-radius: 7px;
    font-size: 13px;
    font-weight: 850;
}

.module-card__level {
    margin-bottom: 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.055em;
    text-transform: uppercase;
}

.module-card h3 {
    margin-bottom: 15px;
    font-size: clamp(29px, 3vw, 38px);
    letter-spacing: -0.025em;
}

.module-card > div > p:not(.module-card__level) {
    color: var(--color-text-muted);
    font-size: 17px;
}

.module-card__steps {
    padding-left: 21px;
    margin: 23px 0 0;
    color: var(--color-text);
}

.module-card__steps li {
    margin-bottom: 9px;
}

.module-card__footer {
    display: grid;
    gap: 18px;
}

.module-card__progress {
    height: 11px;
    overflow: hidden;
    background: #dfe9ed;
    border-radius: 6px;
}

.module-card__progress span {
    display: block;
    height: 100%;
    background:
        linear-gradient(
            90deg,
            var(--color-secondary) 0%,
            var(--color-secondary-dark) 100%
        );
    border-radius: inherit;
}

.module-card__footer .btn {
    justify-self: start;
}

@media (max-width: 1180px) {
    .modules-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .modules-grid {
        grid-template-columns: 1fr;
    }

    .module-card {
        min-height: auto;
    }
}

@media (max-width: 520px) {
    .module-card {
        padding: 26px 22px;
    }

    .module-card__top {
        align-items: flex-start;
        flex-direction: column;
    }

    .module-card__footer .btn {
        width: 100%;
    }
}

/* =========================================================
   MODULE RÉCIPROQUE DE THALÈS — INTRODUCTION ET ALIGNEMENTS
   ========================================================= */

.reciproque-mission {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
    gap: 42px;
    align-items: center;
    padding-block: 34px 58px;
}

.reciproque-mission__content h1 {
    max-width: 720px;
    margin-bottom: 22px;
}

.reciproque-mission__lead {
    max-width: 720px;
    margin-bottom: 26px;
    color: var(--color-text-muted);
    font-size: 19px;
    line-height: 1.7;
}

.reciproque-mission__comparison {
    display: grid;
    gap: 12px;
    margin-bottom: 28px;
}

.reciproque-mission__comparison article {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 16px 18px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.reciproque-mission__comparison article:last-child {
    border-color: rgba(15, 157, 145, 0.45);
    background: rgba(238, 250, 248, 0.96);
}

.reciproque-mission__comparison span {
    font-size: 25px;
}

.reciproque-mission__comparison strong {
    display: block;
    margin-bottom: 4px;
    color: var(--color-primary);
}

.reciproque-mission__comparison p {
    margin: 0;
    color: var(--color-text-muted);
}

.reciproque-mission__visual {
    padding: 20px;
    overflow: hidden;
}

.reciproque-mission__visual svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-mission__visual > p {
    max-width: 580px;
    margin: 12px auto 2px;
    color: var(--color-text-muted);
    text-align: center;
}

.reciproque-figure__triangle {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.reciproque-figure__mystery-line {
    stroke: #d47a20;
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 15 10;
}

.reciproque-figure__point {
    fill: #0f9d91;
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-figure__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 28px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-figure__ratio-card rect {
    fill: #ffffff;
    stroke: rgba(15, 157, 145, 0.45);
    stroke-width: 2;
}

.reciproque-figure__ratio-card text {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 18px;
    font-weight: 850;
    text-anchor: middle;
}

.reciproque-conditions {
    padding-block: 34px 54px;
}

.reciproque-conditions__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.reciproque-condition {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
}

.reciproque-condition__number {
    display: inline-flex;
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-secondary-dark);
    border-radius: 50%;
    font-size: 18px;
    font-weight: 900;
}

.reciproque-condition h3 {
    margin-bottom: 8px;
}

.reciproque-condition p {
    margin: 0;
    color: var(--color-text-muted);
}

.reciproque-alignment-game {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
    gap: 30px;
    padding: 30px;
    background:
        radial-gradient(
            circle at 92% 8%,
            rgba(244, 185, 66, 0.13) 0%,
            rgba(244, 185, 66, 0) 35%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(241, 250, 248, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.reciproque-alignment-game__choices {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    min-width: 0;
}

.reciproque-alignment-choice {
    position: relative;
    display: flex;
    min-width: 0;
    min-height: 330px;
    flex-direction: column;
    gap: 8px;
    align-items: center;
    justify-content: space-between;
    padding: 16px 12px 18px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 13px;
    font: inherit;
    font-weight: 850;
    cursor: pointer;
    transition:
        transform 160ms ease,
        border-color 160ms ease,
        box-shadow 160ms ease,
        background-color 160ms ease;
}

.reciproque-alignment-choice:hover:not(:disabled) {
    transform: translateY(-3px);
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-small);
}

.reciproque-alignment-choice:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.reciproque-alignment-choice svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-alignment-choice__letter {
    display: inline-flex;
    position: absolute;
    top: 12px;
    left: 12px;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-primary);
    border-radius: 50%;
    font-size: 16px;
    font-weight: 900;
}

.reciproque-choice-line {
    stroke: var(--color-primary);
    stroke-width: 5;
    stroke-linecap: round;
    transition:
        stroke 180ms ease,
        stroke-width 180ms ease,
        filter 180ms ease;
}

.reciproque-choice-point {
    fill: var(--color-secondary);
    stroke: #ffffff;
    stroke-width: 3;
    transition:
        fill 180ms ease,
        r 180ms ease,
        filter 180ms ease;
}

.reciproque-choice-label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 18px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-alignment-choice__proof {
    opacity: 0;
    transform: translateY(8px);
    transition:
        opacity 200ms ease,
        transform 200ms ease;
}

.reciproque-alignment-choice__proof rect {
    fill: #17663f;
}

.reciproque-alignment-choice__proof text {
    fill: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 14px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-alignment-choice--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.96);
    border-color: var(--color-success);
    box-shadow: 0 12px 26px rgba(35, 139, 87, 0.18);
}

.reciproque-alignment-choice--correct .reciproque-choice-line {
    stroke: var(--color-success);
    stroke-width: 7;
    filter: drop-shadow(0 0 5px rgba(35, 139, 87, 0.28));
}

.reciproque-alignment-choice--correct .reciproque-choice-point {
    fill: var(--color-success);
    filter: drop-shadow(0 0 5px rgba(35, 139, 87, 0.28));
}

.reciproque-alignment-choice--correct .reciproque-alignment-choice__proof {
    opacity: 1;
    transform: translateY(0);
}

.reciproque-alignment-choice--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.96);
    border-color: var(--color-error);
}

.reciproque-alignment-game__hint {
    align-self: center;
    padding: 24px;
    background: rgba(255, 250, 238, 0.98);
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 13px;
}

.reciproque-alignment-game__hint h3 {
    margin-bottom: 10px;
}

.reciproque-alignment-game__hint > p:not(.angle-exercise__step) {
    color: var(--color-text-muted);
}

.reciproque-order-hint {
    display: flex;
    gap: 7px;
    align-items: center;
    margin-top: 16px;
}

.reciproque-order-hint span {
    display: inline-flex;
    flex: 0 0 34px;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-secondary-dark);
    border-radius: 50%;
    font-weight: 900;
}

.reciproque-order-hint i {
    flex: 1;
    height: 3px;
    background: var(--color-secondary);
    border-radius: 999px;
}

@media (max-width: 1050px) {
    .reciproque-mission,
    .reciproque-alignment-game {
        grid-template-columns: 1fr;
    }

    .reciproque-mission__visual {
        max-width: 760px;
        margin-inline: auto;
    }

    .reciproque-alignment-game__hint {
        width: 100%;
    }
}

@media (max-width: 780px) {
    .reciproque-conditions__grid,
    .reciproque-alignment-game__choices {
        grid-template-columns: 1fr;
    }

    .reciproque-alignment-choice {
        min-height: 0;
    }

    .reciproque-alignment-choice svg {
        max-width: 360px;
    }
}

@media (max-width: 560px) {
    .reciproque-mission {
        padding-top: 18px;
    }

    .reciproque-mission__lead {
        font-size: 17px;
    }

    .reciproque-mission__visual,
    .reciproque-alignment-game {
        padding: 18px;
    }

    .reciproque-condition {
        padding: 20px;
    }
}

/* =========================================================
   MODULE RÉCIPROQUE DE THALÈS — CÔTÉS CORRESPONDANTS
   ========================================================= */

.reciproque-sides-game {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(330px, 0.8fr);
    gap: 32px;
    padding: 32px;
    background:
        radial-gradient(
            circle at 92% 8%,
            rgba(244, 185, 66, 0.13) 0%,
            rgba(244, 185, 66, 0) 35%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(241, 250, 248, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.reciproque-sides-game__figure {
    min-width: 0;
}

.reciproque-sides-game__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-sides-game__caption {
    margin: 12px 0 0;
    color: var(--color-text-muted);
    font-size: 14px;
    text-align: center;
}

.reciproque-sides-figure__large-triangle {
    fill: rgba(255, 255, 255, 0.45);
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linejoin: round;
}

.reciproque-sides-figure__small-triangle {
    fill: rgba(15, 157, 145, 0.11);
    stroke: none;
}

.reciproque-sides-figure__segment {
    stroke: transparent;
    stroke-width: 16;
    stroke-linecap: round;
    transition:
        stroke 200ms ease,
        filter 200ms ease;
}

.reciproque-sides-figure__segment--matched-one {
    stroke: #0f9d91;
    filter: drop-shadow(0 0 6px rgba(15, 157, 145, 0.36));
}

.reciproque-sides-figure__segment--matched-two {
    stroke: #d47a20;
    filter: drop-shadow(0 0 6px rgba(212, 122, 32, 0.34));
}

.reciproque-sides-figure__mn,
.reciproque-sides-figure__bc {
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linecap: round;
}

.reciproque-sides-figure__point {
    fill: var(--color-primary);
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-sides-figure__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 27px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-sides-figure__pair rect {
    fill: #ffffff;
    stroke-width: 3;
}

.reciproque-sides-figure__pair text {
    font-family: Arial, sans-serif;
    font-size: 20px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-sides-figure__pair--left rect {
    stroke: #0f9d91;
}

.reciproque-sides-figure__pair--left text {
    fill: #0f786f;
}

.reciproque-sides-figure__pair--right rect {
    stroke: #d47a20;
}

.reciproque-sides-figure__pair--right text {
    fill: #a75b12;
}

.reciproque-sides-game__challenge {
    align-self: center;
}

.reciproque-sides-question {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.reciproque-sides-question[hidden] {
    display: none;
}

.reciproque-sides-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.reciproque-sides-question h3 {
    margin-bottom: 20px;
    font-size: 25px;
    line-height: 1.25;
}

.reciproque-sides-options {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.reciproque-sides-option {
    display: inline-flex;
    min-width: 0;
    min-height: 60px;
    align-items: center;
    justify-content: center;
    padding: 10px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 19px;
    font-weight: 850;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.reciproque-sides-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.reciproque-sides-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.reciproque-sides-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.reciproque-sides-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.reciproque-sides-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.reciproque-sides-feedback[hidden] {
    display: none;
}

.reciproque-sides-feedback:focus {
    outline: none;
}

.reciproque-sides-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.reciproque-sides-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.reciproque-sides-game__hint {
    padding: 22px;
    margin-top: 18px;
    background:
        linear-gradient(
            145deg,
            rgba(255, 247, 224, 0.96) 0%,
            rgba(255, 252, 243, 0.96) 100%
        );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.reciproque-sides-game__hint h3 {
    margin-bottom: 11px;
    font-size: 22px;
}

.reciproque-sides-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 980px) {
    .reciproque-sides-game {
        grid-template-columns: 1fr;
    }

    .reciproque-sides-game__figure {
        max-width: 760px;
        margin-inline: auto;
    }
}

@media (max-width: 760px) {
    .reciproque-sides-game {
        padding: 24px;
    }
}

@media (max-width: 520px) {
    .reciproque-sides-game {
        padding: 18px;
    }

    .reciproque-sides-question {
        padding: 20px;
    }

    .reciproque-sides-options {
        grid-template-columns: 1fr;
    }
}

/* =========================================================
   MODULE RÉCIPROQUE DE THALÈS — CONSTRUCTION DES RAPPORTS
   ========================================================= */

.reciproque-ratios-game {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(350px, 0.88fr);
    gap: 32px;
    padding: 32px;
    background:
        radial-gradient(
            circle at 92% 8%,
            rgba(244, 185, 66, 0.13) 0%,
            rgba(244, 185, 66, 0) 35%
        ),
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.99) 0%,
            rgba(241, 250, 248, 0.99) 100%
        );
    box-shadow: var(--shadow-medium);
}

.reciproque-ratios-game__figure {
    min-width: 0;
}

.reciproque-ratios-game__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-ratios-game__caption {
    margin: 12px 0 0;
    color: var(--color-text-muted);
    font-size: 14px;
    text-align: center;
}

.reciproque-ratios-figure__triangle {
    fill: rgba(255, 255, 255, 0.42);
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linejoin: round;
}

.reciproque-ratios-figure__small-triangle {
    fill: rgba(15, 157, 145, 0.1);
    stroke: none;
}

.reciproque-ratios-figure__segment {
    stroke: transparent;
    stroke-width: 17;
    stroke-linecap: round;
    transition:
        stroke 200ms ease,
        filter 200ms ease;
}

.reciproque-ratios-figure__segment--left {
    stroke: #0f9d91;
    filter: drop-shadow(0 0 6px rgba(15, 157, 145, 0.36));
}

.reciproque-ratios-figure__segment--right {
    stroke: #d47a20;
    filter: drop-shadow(0 0 6px rgba(212, 122, 32, 0.34));
}

.reciproque-ratios-figure__base {
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linecap: round;
}

.reciproque-ratios-figure__point {
    fill: var(--color-primary);
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-ratios-figure__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 27px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-ratios-figure__side-label {
    fill: transparent;
    font-family: Arial, sans-serif;
    font-size: 23px;
    font-weight: 900;
    text-anchor: middle;
    transition: fill 200ms ease;
}

.reciproque-ratios-figure__side-label--left {
    fill: #0f786f;
}

.reciproque-ratios-figure__side-label--right {
    fill: #a75b12;
}

.reciproque-ratios-game__builder {
    align-self: center;
}

.reciproque-ratios-formula {
    display: flex;
    gap: 22px;
    align-items: center;
    justify-content: center;
    padding: 24px;
    margin-bottom: 18px;
    background: linear-gradient(
        145deg,
        rgba(15, 157, 145, 0.08),
        rgba(244, 185, 66, 0.09)
    );
    border: 1px solid var(--color-border);
    border-radius: 14px;
}

.reciproque-ratio {
    display: grid;
    grid-template-rows: minmax(46px, auto) 4px minmax(46px, auto);
    width: 110px;
    align-items: center;
}

.reciproque-ratio__slot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    background: #ffffff;
    border: 2px dashed var(--color-border);
    border-radius: 9px;
    font-size: 23px;
    font-weight: 900;
    transition:
        color 180ms ease,
        border-color 180ms ease,
        background-color 180ms ease;
}

.reciproque-ratio__slot--filled {
    color: var(--color-primary);
    background: rgba(234, 248, 239, 0.96);
    border-color: var(--color-success);
    border-style: solid;
}

.reciproque-ratio__line {
    display: block;
    height: 4px;
    background: var(--color-primary);
    border-radius: 999px;
}

.reciproque-ratios-formula__equals {
    color: var(--color-primary);
    font-size: 32px;
    font-weight: 900;
}

.reciproque-ratios-question {
    padding: 24px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.reciproque-ratios-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.reciproque-ratios-question h3 {
    margin-bottom: 18px;
    font-size: 23px;
    line-height: 1.3;
}

.reciproque-ratios-options {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 9px;
}

.reciproque-ratios-option {
    display: inline-flex;
    min-width: 0;
    min-height: 56px;
    align-items: center;
    justify-content: center;
    padding: 9px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 18px;
    font-weight: 850;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.reciproque-ratios-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.reciproque-ratios-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.reciproque-ratios-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.reciproque-ratios-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.reciproque-ratios-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.reciproque-ratios-feedback[hidden] {
    display: none;
}

.reciproque-ratios-feedback:focus {
    outline: none;
}

.reciproque-ratios-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.reciproque-ratios-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.reciproque-ratios-game__hint {
    padding: 20px;
    margin-top: 18px;
    background: linear-gradient(
        145deg,
        rgba(255, 247, 224, 0.96),
        rgba(255, 252, 243, 0.96)
    );
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.reciproque-ratios-game__hint h3 {
    margin-bottom: 10px;
}

.reciproque-ratios-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 1000px) {
    .reciproque-ratios-game {
        grid-template-columns: 1fr;
    }

    .reciproque-ratios-game__figure {
        max-width: 760px;
        margin-inline: auto;
    }
}

@media (max-width: 620px) {
    .reciproque-ratios-game {
        padding: 20px;
    }

    .reciproque-ratios-formula {
        gap: 12px;
        padding: 18px;
    }

    .reciproque-ratio {
        width: 90px;
    }

    .reciproque-ratios-options {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 420px) {
    .reciproque-ratios-formula {
        flex-direction: column;
    }

    .reciproque-ratios-formula__equals {
        transform: rotate(90deg);
    }

    .reciproque-ratio {
        width: 120px;
    }
}

/* =========================================================
   MODULE RÉCIPROQUE DE THALÈS — CALCUL DES RAPPORTS
   ========================================================= */

.reciproque-calcul-game {
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.82fr);
    gap: 32px;
    padding: 32px;
    background:
        radial-gradient(circle at 92% 8%, rgba(244, 185, 66, 0.13) 0%, rgba(244, 185, 66, 0) 35%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.99) 0%, rgba(241, 250, 248, 0.99) 100%);
    box-shadow: var(--shadow-medium);
}

.reciproque-calcul-game__figure {
    min-width: 0;
}

.reciproque-calcul-game__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-calcul-game__caption {
    margin: 12px 0 0;
    color: var(--color-text-muted);
    font-size: 14px;
    text-align: center;
}

.reciproque-calcul-figure__triangle {
    fill: rgba(255, 255, 255, 0.42);
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linejoin: round;
}

.reciproque-calcul-figure__small-triangle {
    fill: rgba(15, 157, 145, 0.1);
    stroke: none;
}

.reciproque-calcul-figure__segment,
.reciproque-calcul-figure__whole-side {
    stroke: transparent;
    stroke-width: 18;
    stroke-linecap: round;
    transition: stroke 200ms ease, filter 200ms ease;
}

.reciproque-calcul-figure__segment--left-active,
.reciproque-calcul-figure__whole-side--left-active {
    stroke: #0f9d91;
    filter: drop-shadow(0 0 6px rgba(15, 157, 145, 0.36));
}

.reciproque-calcul-figure__segment--right-active,
.reciproque-calcul-figure__whole-side--right-active {
    stroke: #d47a20;
    filter: drop-shadow(0 0 6px rgba(212, 122, 32, 0.34));
}

.reciproque-calcul-figure__base {
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linecap: round;
}

.reciproque-calcul-figure__point {
    fill: var(--color-primary);
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-calcul-figure__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 27px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-calcul-figure__measure rect {
    fill: #ffffff;
    stroke: var(--color-border);
    stroke-width: 2;
}

.reciproque-calcul-figure__measure text {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 15px;
    font-weight: 850;
    text-anchor: middle;
}

.reciproque-calcul-figure__result[hidden],
.reciproque-calcul-figure__equality[hidden] {
    display: none;
}

.reciproque-calcul-figure__result rect {
    fill: #ffffff;
    stroke-width: 3;
}

.reciproque-calcul-figure__result text {
    font-family: Arial, sans-serif;
    font-size: 19px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-calcul-figure__result--left rect {
    stroke: #0f9d91;
}

.reciproque-calcul-figure__result--left text {
    fill: #0f786f;
}

.reciproque-calcul-figure__result--right rect {
    stroke: #d47a20;
}

.reciproque-calcul-figure__result--right text {
    fill: #a75b12;
}

.reciproque-calcul-figure__equality circle {
    fill: #17663f;
    stroke: #ffffff;
    stroke-width: 5;
    filter: drop-shadow(0 8px 15px rgba(23, 102, 63, 0.22));
}

.reciproque-calcul-figure__equality text {
    fill: #ffffff;
    font-family: Arial, sans-serif;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-calcul-figure__equality-value {
    font-size: 21px;
}

.reciproque-calcul-figure__equality-label {
    font-size: 16px;
    letter-spacing: 0.02em;
}

.reciproque-calcul-game__challenge {
    align-self: center;
}

.reciproque-calcul-question {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.reciproque-calcul-question[hidden] {
    display: none;
}

.reciproque-calcul-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.reciproque-calcul-question h3 {
    margin-bottom: 20px;
    font-size: 24px;
    line-height: 1.3;
}

.reciproque-calcul-options {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.reciproque-calcul-options--comparison {
    grid-template-columns: 1fr;
}

.reciproque-calcul-option {
    display: inline-flex;
    min-width: 0;
    min-height: 60px;
    align-items: center;
    justify-content: center;
    padding: 10px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 18px;
    font-weight: 850;
    text-align: center;
    cursor: pointer;
    transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.reciproque-calcul-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.reciproque-calcul-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.reciproque-calcul-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.reciproque-calcul-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.reciproque-calcul-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.reciproque-calcul-feedback[hidden] {
    display: none;
}

.reciproque-calcul-feedback:focus {
    outline: none;
}

.reciproque-calcul-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.reciproque-calcul-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.reciproque-calcul-game__hint {
    padding: 22px;
    margin-top: 18px;
    background: linear-gradient(145deg, rgba(255, 247, 224, 0.96), rgba(255, 252, 243, 0.96));
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.reciproque-calcul-game__hint h3 {
    margin-bottom: 10px;
}

.reciproque-calcul-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 1000px) {
    .reciproque-calcul-game {
        grid-template-columns: 1fr;
    }

    .reciproque-calcul-game__figure {
        max-width: 780px;
        margin-inline: auto;
    }
}

@media (max-width: 620px) {
    .reciproque-calcul-game {
        padding: 20px;
    }

    .reciproque-calcul-options {
        grid-template-columns: 1fr;
    }

    .reciproque-calcul-question {
        padding: 20px;
    }
}

/* =========================================================
   MODULE RÉCIPROQUE DE THALÈS — CONCLUSION
   ========================================================= */

.reciproque-conclusion-game {
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(350px, 0.82fr);
    gap: 32px;
    padding: 32px;
    background:
        radial-gradient(circle at 92% 8%, rgba(244, 185, 66, 0.13) 0%, rgba(244, 185, 66, 0) 35%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.99) 0%, rgba(241, 250, 248, 0.99) 100%);
    box-shadow: var(--shadow-medium);
}

.reciproque-conclusion-game__figure {
    min-width: 0;
}

.reciproque-conclusion-game__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-conclusion-game__caption {
    margin: 12px 0 0;
    color: var(--color-text-muted);
    font-size: 14px;
    text-align: center;
}

.reciproque-conclusion-figure__triangle {
    fill: rgba(255, 255, 255, 0.42);
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linejoin: round;
}

.reciproque-conclusion-figure__small-triangle {
    fill: rgba(15, 157, 145, 0.1);
    stroke: none;
}

.reciproque-conclusion-figure__parallel-line {
    stroke: var(--color-primary);
    stroke-width: 7;
    stroke-linecap: round;
    transition: stroke 220ms ease, stroke-width 220ms ease, filter 220ms ease;
}

.reciproque-conclusion-figure__parallel-line--active {
    stroke: var(--color-success);
    stroke-width: 11;
    filter: drop-shadow(0 0 7px rgba(35, 139, 87, 0.38));
}

.reciproque-conclusion-figure__point {
    fill: var(--color-primary);
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-conclusion-figure__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 27px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-conclusion-figure__condition {
    opacity: 0.28;
    transition: opacity 200ms ease, transform 200ms ease;
    transform-origin: center;
}

.reciproque-conclusion-figure__condition rect {
    fill: #ffffff;
    stroke: var(--color-border);
    stroke-width: 2;
}

.reciproque-conclusion-figure__condition text {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 17px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-conclusion-figure__condition--active {
    opacity: 1;
    transform: scale(1.03);
}

.reciproque-conclusion-figure__condition--active rect {
    fill: rgba(234, 248, 239, 0.98);
    stroke: var(--color-success);
    stroke-width: 3;
}

.reciproque-conclusion-figure__parallel-markers {
    opacity: 0;
    transition: opacity 220ms ease;
}

.reciproque-conclusion-figure__parallel-markers path {
    fill: none;
    stroke: #ffffff;
    stroke-width: 6;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.reciproque-conclusion-figure__parallel-markers--active {
    opacity: 1;
}

.reciproque-conclusion-figure__final-badge {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 220ms ease, transform 220ms ease;
}

.reciproque-conclusion-figure__final-badge rect {
    fill: #17663f;
    stroke: #ffffff;
    stroke-width: 4;
    filter: drop-shadow(0 10px 18px rgba(23, 102, 63, 0.24));
}

.reciproque-conclusion-figure__final-badge text {
    fill: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 20px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-conclusion-figure__final-badge--active {
    opacity: 1;
    transform: translateY(0);
}

.reciproque-conclusion-game__challenge {
    align-self: center;
}

.reciproque-conclusion-question {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.reciproque-conclusion-question[hidden] {
    display: none;
}

.reciproque-conclusion-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.reciproque-conclusion-question h3 {
    margin-bottom: 20px;
    font-size: 24px;
    line-height: 1.3;
}

.reciproque-conclusion-options {
    display: grid;
    gap: 10px;
}

.reciproque-conclusion-option {
    display: inline-flex;
    width: 100%;
    min-height: 60px;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 17px;
    font-weight: 850;
    text-align: center;
    cursor: pointer;
    transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.reciproque-conclusion-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.reciproque-conclusion-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.reciproque-conclusion-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.reciproque-conclusion-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.reciproque-conclusion-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.reciproque-conclusion-feedback[hidden] {
    display: none;
}

.reciproque-conclusion-feedback:focus {
    outline: none;
}

.reciproque-conclusion-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.reciproque-conclusion-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.reciproque-conclusion-game__hint {
    padding: 22px;
    margin-top: 18px;
    background: linear-gradient(145deg, rgba(255, 247, 224, 0.96), rgba(255, 252, 243, 0.96));
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.reciproque-conclusion-game__hint h3 {
    margin-bottom: 10px;
}

.reciproque-conclusion-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

@media (max-width: 1000px) {
    .reciproque-conclusion-game {
        grid-template-columns: 1fr;
    }

    .reciproque-conclusion-game__figure {
        max-width: 780px;
        margin-inline: auto;
    }
}

@media (max-width: 620px) {
    .reciproque-conclusion-game {
        padding: 20px;
    }

    .reciproque-conclusion-question {
        padding: 20px;
    }
}

/* =========================================================
   MODULE RÉCIPROQUE DE THALÈS — VÉRIFICATION DES CONDITIONS
   ========================================================= */

.reciproque-check-game {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
    gap: 32px;
    padding: 32px;
    background:
        radial-gradient(circle at 92% 8%, rgba(244, 185, 66, 0.13) 0%, rgba(244, 185, 66, 0) 35%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.99) 0%, rgba(241, 250, 248, 0.99) 100%);
    box-shadow: var(--shadow-medium);
}

.reciproque-check-game__cases {
    min-width: 0;
}

.reciproque-check-case {
    padding: 18px;
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 16px;
    box-shadow: var(--shadow-small);
    transition:
        border-color 220ms ease,
        background-color 220ms ease,
        box-shadow 220ms ease;
}

.reciproque-check-case[hidden] {
    display: none;
}

.reciproque-check-case__heading {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 14px;
}

.reciproque-check-case__heading span {
    display: inline-flex;
    min-width: 64px;
    min-height: 34px;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    background: var(--color-primary);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 900;
}

.reciproque-check-case__heading strong {
    color: var(--color-primary);
    font-size: 18px;
}

.reciproque-check-case svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-check-figure__background {
    fill: #f5fbfa;
}

.reciproque-check-figure__triangle {
    fill: rgba(15, 157, 145, 0.08);
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linejoin: round;
}

.reciproque-check-figure__inner-line,
.reciproque-check-figure__base-line {
    stroke: var(--color-primary);
    stroke-width: 7;
    stroke-linecap: round;
    transition:
        stroke 220ms ease,
        stroke-width 220ms ease,
        filter 220ms ease;
}

.reciproque-check-figure__point {
    fill: var(--color-primary);
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-check-figure__point--warning {
    fill: var(--color-error);
}

.reciproque-check-figure__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 24px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-check-figure__data rect {
    fill: #ffffff;
    stroke: var(--color-border);
    stroke-width: 2;
}

.reciproque-check-figure__data text {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 14px;
    font-weight: 850;
    text-anchor: middle;
}

.reciproque-check-figure__warning circle {
    fill: var(--color-error);
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-check-figure__warning text {
    fill: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 28px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-check-figure__result {
    opacity: 0;
    transform: translateY(12px);
    transition:
        opacity 220ms ease,
        transform 220ms ease;
}

.reciproque-check-figure__result rect {
    fill: var(--color-primary);
    stroke: #ffffff;
    stroke-width: 4;
    filter: drop-shadow(0 10px 18px rgba(23, 32, 51, 0.22));
}

.reciproque-check-figure__result text {
    fill: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 18px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-check-case--valid {
    background: rgba(234, 248, 239, 0.92);
    border-color: var(--color-success);
    box-shadow: 0 14px 30px rgba(35, 139, 87, 0.17);
}

.reciproque-check-case--valid .reciproque-check-figure__inner-line,
.reciproque-check-case--valid .reciproque-check-figure__base-line {
    stroke: var(--color-success);
    stroke-width: 11;
    filter: drop-shadow(0 0 7px rgba(35, 139, 87, 0.36));
}

.reciproque-check-case--valid .reciproque-check-figure__result {
    opacity: 1;
    transform: translateY(0);
}

.reciproque-check-case--valid .reciproque-check-figure__result rect {
    fill: #17663f;
}

.reciproque-check-case--invalid {
    background: rgba(255, 239, 241, 0.9);
    border-color: var(--color-error);
}

.reciproque-check-case--invalid .reciproque-check-figure__result {
    opacity: 1;
    transform: translateY(0);
}

.reciproque-check-case--invalid .reciproque-check-figure__result rect {
    fill: #8f2632;
}

.reciproque-check-game__challenge {
    align-self: center;
}

.reciproque-check-question {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.reciproque-check-question[hidden] {
    display: none;
}

.reciproque-check-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.reciproque-check-question h3 {
    margin-bottom: 20px;
    font-size: 24px;
    line-height: 1.3;
}

.reciproque-check-options {
    display: grid;
    gap: 10px;
}

.reciproque-check-option {
    display: inline-flex;
    width: 100%;
    min-height: 60px;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 17px;
    font-weight: 850;
    text-align: center;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.reciproque-check-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.reciproque-check-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.reciproque-check-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.reciproque-check-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.reciproque-check-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.reciproque-check-feedback[hidden] {
    display: none;
}

.reciproque-check-feedback:focus {
    outline: none;
}

.reciproque-check-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.reciproque-check-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.reciproque-check-game__hint {
    padding: 22px;
    margin-top: 18px;
    background: linear-gradient(145deg, rgba(255, 247, 224, 0.96), rgba(255, 252, 243, 0.96));
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.reciproque-check-game__hint h3 {
    margin-bottom: 10px;
}

.reciproque-check-game__hint ol {
    padding-left: 22px;
    margin: 0;
    color: var(--color-text-muted);
}

.reciproque-check-game__hint li + li {
    margin-top: 8px;
}

@media (max-width: 1000px) {
    .reciproque-check-game {
        grid-template-columns: 1fr;
    }

    .reciproque-check-game__cases {
        max-width: 760px;
        margin-inline: auto;
    }
}

@media (max-width: 620px) {
    .reciproque-check-game {
        padding: 20px;
    }

    .reciproque-check-case {
        padding: 14px;
    }

    .reciproque-check-case__heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .reciproque-check-question {
        padding: 20px;
    }
}

/* =========================================================
   MODULE RÉCIPROQUE DE THALÈS — DÉFI FINAL
   ========================================================= */

.reciproque-final-game {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(350px, 0.8fr);
    gap: 32px;
    padding: 32px;
    background:
        radial-gradient(circle at 92% 8%, rgba(244, 185, 66, 0.13) 0%, rgba(244, 185, 66, 0) 35%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.99) 0%, rgba(241, 250, 248, 0.99) 100%);
    box-shadow: var(--shadow-medium);
}

.reciproque-final-game__figure {
    min-width: 0;
}

.reciproque-final-game__figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-final-game__caption {
    margin: 12px 0 0;
    color: var(--color-text-muted);
    font-size: 14px;
    text-align: center;
}

.reciproque-final-figure__triangle {
    fill: rgba(255, 255, 255, 0.42);
    stroke: var(--color-primary);
    stroke-width: 6;
    stroke-linejoin: round;
}

.reciproque-final-figure__small-triangle {
    fill: rgba(15, 157, 145, 0.1);
    stroke: none;
}

.reciproque-final-figure__candidate-line,
.reciproque-final-figure__base-line {
    stroke: var(--color-primary);
    stroke-width: 7;
    stroke-linecap: round;
    transition:
        stroke 220ms ease,
        stroke-width 220ms ease,
        filter 220ms ease;
}

.reciproque-final-figure__parallel-line--active {
    stroke: var(--color-success);
    stroke-width: 11;
    filter: drop-shadow(0 0 7px rgba(35, 139, 87, 0.38));
}

.reciproque-final-figure__point {
    fill: var(--color-primary);
    stroke: #ffffff;
    stroke-width: 4;
}

.reciproque-final-figure__label {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 27px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-final-figure__measure rect {
    fill: #ffffff;
    stroke: var(--color-border);
    stroke-width: 2;
}

.reciproque-final-figure__measure text {
    fill: var(--color-primary);
    font-family: Arial, sans-serif;
    font-size: 15px;
    font-weight: 850;
    text-anchor: middle;
}

.reciproque-final-figure__badge[hidden],
.reciproque-final-figure__calculation[hidden],
.reciproque-final-figure__parallel-markers[hidden],
.reciproque-final-figure__final-badge[hidden] {
    display: none;
}

.reciproque-final-figure__badge rect {
    fill: rgba(234, 248, 239, 0.98);
    stroke: var(--color-success);
    stroke-width: 3;
}

.reciproque-final-figure__badge text {
    fill: #17663f;
    font-family: Arial, sans-serif;
    font-size: 18px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-final-figure__calculation rect {
    fill: #ffffff;
    stroke-width: 3;
}

.reciproque-final-figure__calculation text {
    font-family: Arial, sans-serif;
    font-size: 18px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-final-figure__calculation--left rect {
    stroke: #0f9d91;
}

.reciproque-final-figure__calculation--left text {
    fill: #0f786f;
}

.reciproque-final-figure__calculation--right rect {
    stroke: #d47a20;
}

.reciproque-final-figure__calculation--right text {
    fill: #a75b12;
}

.reciproque-final-figure__parallel-markers path {
    fill: none;
    stroke: #ffffff;
    stroke-width: 6;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.reciproque-final-figure__final-badge rect {
    fill: #17663f;
    stroke: #ffffff;
    stroke-width: 4;
    filter: drop-shadow(0 10px 18px rgba(23, 102, 63, 0.24));
}

.reciproque-final-figure__final-badge text {
    fill: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 21px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-final-game__challenge {
    align-self: center;
}

.reciproque-final-question {
    padding: 26px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-small);
}

.reciproque-final-question[hidden] {
    display: none;
}

.reciproque-final-question__step {
    margin: 0 0 7px;
    color: var(--color-secondary-dark);
    font-size: 13px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.reciproque-final-question h3 {
    margin-bottom: 20px;
    font-size: 24px;
    line-height: 1.3;
}

.reciproque-final-options {
    display: grid;
    gap: 10px;
}

.reciproque-final-options--numbers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.reciproque-final-option {
    display: inline-flex;
    width: 100%;
    min-height: 60px;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    color: var(--color-primary);
    background: #ffffff;
    border: 2px solid var(--color-border);
    border-radius: 9px;
    font: inherit;
    font-size: 17px;
    font-weight: 850;
    text-align: center;
    cursor: pointer;
    transition:
        transform 150ms ease,
        box-shadow 150ms ease,
        border-color 150ms ease;
}

.reciproque-final-option:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.reciproque-final-option:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 4px;
}

.reciproque-final-option--correct {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-color: var(--color-success);
}

.reciproque-final-option--incorrect {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-color: var(--color-error);
}

.reciproque-final-feedback {
    display: block;
    width: 100%;
    padding: 12px 14px;
    margin: 16px 0 0;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 750;
    box-sizing: border-box;
}

.reciproque-final-feedback[hidden] {
    display: none;
}

.reciproque-final-feedback:focus {
    outline: none;
}

.reciproque-final-feedback--success {
    color: #17663f;
    background: rgba(234, 248, 239, 0.95);
    border-left: 4px solid var(--color-success);
}

.reciproque-final-feedback--error {
    color: #8f2632;
    background: rgba(255, 239, 241, 0.95);
    border-left: 4px solid var(--color-error);
}

.reciproque-final-game__hint {
    padding: 22px;
    margin-top: 18px;
    background: linear-gradient(145deg, rgba(255, 247, 224, 0.96), rgba(255, 252, 243, 0.96));
    border: 1px solid rgba(244, 185, 66, 0.45);
    border-radius: 12px;
}

.reciproque-final-game__hint h3 {
    margin-bottom: 10px;
}

.reciproque-final-game__hint p:last-child {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

.reciproque-final-summary {
    padding-block: 64px 36px;
}

.reciproque-final-summary__heading {
    max-width: 760px;
    margin: 0 auto 28px;
    text-align: center;
}

.reciproque-final-summary__heading p:last-child {
    color: var(--color-text-muted);
}

.reciproque-final-summary__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.reciproque-final-summary__item {
    padding: 24px;
}

.reciproque-final-summary__item > span {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: #ffffff;
    background: var(--color-secondary-dark);
    border-radius: 50%;
    font-weight: 900;
}

.reciproque-final-summary__item h3 {
    margin-bottom: 9px;
}

.reciproque-final-summary__item p {
    margin: 0;
    color: var(--color-text-muted);
}

.reciproque-final-summary__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-top: 28px;
}

@media (max-width: 1040px) {
    .reciproque-final-game {
        grid-template-columns: 1fr;
    }

    .reciproque-final-game__figure {
        max-width: 820px;
        margin-inline: auto;
    }

    .reciproque-final-summary__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .reciproque-final-game {
        padding: 20px;
    }

    .reciproque-final-question {
        padding: 20px;
    }

    .reciproque-final-options--numbers,
    .reciproque-final-summary__grid {
        grid-template-columns: 1fr;
    }
}

/* RECIPROQUE PYTHAGORE - PLUS GRAND COTE */
.reciproque-largest-card {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(250px, 0.65fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    padding: clamp(1.25rem, 4vw, 2.5rem);
}

.reciproque-largest-figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-largest-side {
    cursor: pointer;
    outline: none;
}

.reciproque-largest-side__hit {
    stroke: transparent;
    stroke-width: 34;
    pointer-events: stroke;
}

.reciproque-largest-side__line {
    stroke: #1e3a5f;
    stroke-width: 8;
    stroke-linecap: round;
    pointer-events: none;
    transition: stroke 180ms ease, stroke-width 180ms ease;
}

.reciproque-largest-side__label {
    fill: #1e3a5f;
    font-size: 22px;
    font-weight: 800;
    text-anchor: middle;
    pointer-events: none;
}

.reciproque-largest-side:hover .reciproque-largest-side__line,
.reciproque-largest-side:focus .reciproque-largest-side__line {
    stroke: #0f9f91;
    stroke-width: 12;
}

.reciproque-largest-side--correct .reciproque-largest-side__line {
    stroke: #178a4b;
    stroke-width: 14;
}

.reciproque-largest-side--correct .reciproque-largest-side__label {
    fill: #126b3c;
}

.reciproque-largest-side--incorrect .reciproque-largest-side__line {
    stroke: #c43d4f;
    stroke-width: 12;
}

.reciproque-largest-side--incorrect .reciproque-largest-side__label {
    fill: #a1283a;
}

.reciproque-largest-point {
    fill: #1e3a5f;
    pointer-events: none;
}

.reciproque-largest-badge rect {
    fill: #e5f6ed;
    stroke: #178a4b;
    stroke-width: 2;
}

.reciproque-largest-badge text {
    fill: #126b3c;
    font-size: 17px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-largest-badge[hidden] {
    display: none;
}

.reciproque-largest-help {
    padding: 1.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(145deg, #f0fbfa, #fff8e8);
    border: 1px solid rgba(30, 58, 95, 0.12);
}

.reciproque-largest-help h3 {
    margin-top: 0.35rem;
}

.reciproque-largest-help__numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin: 1.25rem 0;
}

.reciproque-largest-help__numbers span {
    padding: 0.6rem 0.9rem;
    border-radius: 999px;
    background: #ffffff;
    border: 1px solid rgba(15, 159, 145, 0.35);
    color: #173a61;
    font-weight: 800;
}

@media (max-width: 820px) {
    .reciproque-largest-card {
        grid-template-columns: 1fr;
    }
}

/* RECIPROQUE PYTHAGORE - CARRE PLUS GRAND COTE */
.reciproque-square-card {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(290px, 0.75fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    padding: clamp(1.25rem, 4vw, 2.5rem);
}

.reciproque-square-figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-square-figure__largest-side {
    stroke: #178a4b;
    stroke-width: 14;
    stroke-linecap: round;
}

.reciproque-square-figure__point {
    fill: #1e3a5f;
}

.reciproque-square-figure__side-label {
    fill: #1e3a5f;
    font-size: 21px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-square-figure__side-label--largest {
    fill: #126b3c;
}

.reciproque-square-figure__calculation rect {
    fill: #ffffff;
    stroke: #0f9f91;
    stroke-width: 3;
    filter: drop-shadow(0 8px 16px rgba(30, 58, 95, 0.12));
}

.reciproque-square-figure__calculation-label {
    fill: #087d73;
    font-size: 16px;
    font-weight: 800;
    text-anchor: middle;
    text-transform: uppercase;
}

.reciproque-square-figure__calculation-value {
    fill: #173a61;
    font-size: 28px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-square-challenge {
    padding: 1.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(145deg, #f0fbfa, #fff8e8);
    border: 1px solid rgba(30, 58, 95, 0.12);
}

.reciproque-square-question[hidden] {
    display: none;
}

.reciproque-square-question h3 {
    margin-top: 0.35rem;
}

.reciproque-square-feedback {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 0.9rem;
    font-weight: 700;
}

.reciproque-square-feedback[hidden] {
    display: none;
}

.reciproque-square-feedback:focus {
    outline: 3px solid rgba(15, 159, 145, 0.25);
    outline-offset: 3px;
}

.reciproque-square-feedback--success {
    color: #126b3c;
    background: #e5f6ed;
    border: 1px solid rgba(23, 138, 75, 0.35);
}

.reciproque-square-feedback--error {
    color: #922f3f;
    background: #fff0f2;
    border: 1px solid rgba(196, 61, 79, 0.35);
}

@media (max-width: 900px) {
    .reciproque-square-card {
        grid-template-columns: 1fr;
    }
}

/* RECIPROQUE PYTHAGORE - SOMME DES CARRES */
.reciproque-sum-card {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(290px, 0.65fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    padding: clamp(1.25rem, 4vw, 2.5rem);
}

.reciproque-sum-figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-sum-figure__largest-side {
    stroke: #178a4b;
    stroke-width: 13;
    stroke-linecap: round;
}

.reciproque-sum-figure__point {
    fill: #1e3a5f;
}

.reciproque-sum-figure__side-label {
    fill: #1e3a5f;
    font-size: 20px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-sum-figure__side-label--largest {
    fill: #126b3c;
}

.reciproque-sum-figure__calculation rect {
    fill: #ffffff;
    stroke: #0f9f91;
    stroke-width: 2.5;
}

.reciproque-sum-figure__calculation text,
.reciproque-sum-figure__total text {
    fill: #173a61;
    font-size: 18px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-sum-figure__calculation text:first-of-type,
.reciproque-sum-figure__total text:first-of-type {
    fill: #087d73;
    font-size: 14px;
    text-transform: uppercase;
}

.reciproque-sum-figure__total rect {
    fill: #fff8e8;
    stroke: #f4b942;
    stroke-width: 3;
    filter: drop-shadow(0 8px 16px rgba(30, 58, 95, 0.12));
}

.reciproque-sum-challenge {
    padding: 1.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(145deg, #f0fbfa, #fff8e8);
    border: 1px solid rgba(30, 58, 95, 0.12);
}

.reciproque-sum-question[hidden] {
    display: none;
}

.reciproque-sum-question h3 {
    margin-top: 0.35rem;
}

.reciproque-sum-feedback {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 0.9rem;
    font-weight: 700;
}

.reciproque-sum-feedback[hidden] {
    display: none;
}

.reciproque-sum-feedback:focus {
    outline: 3px solid rgba(15, 159, 145, 0.25);
    outline-offset: 3px;
}

.reciproque-sum-feedback--success {
    color: #126b3c;
    background: #e5f6ed;
    border: 1px solid rgba(23, 138, 75, 0.35);
}

.reciproque-sum-feedback--error {
    color: #922f3f;
    background: #fff0f2;
    border: 1px solid rgba(196, 61, 79, 0.35);
}

@media (max-width: 940px) {
    .reciproque-sum-card {
        grid-template-columns: 1fr;
    }
}

/* RECIPROQUE PYTHAGORE - COMPARAISON */
.reciproque-compare-card {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    padding: clamp(1.25rem, 4vw, 2.5rem);
}

.reciproque-compare-figure svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-compare-figure__largest-side {
    stroke: #178a4b;
    stroke-width: 13;
    stroke-linecap: round;
}

.reciproque-compare-figure__point {
    fill: #1e3a5f;
}

.reciproque-compare-figure__side-label {
    fill: #1e3a5f;
    font-size: 20px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-compare-figure__side-label--largest {
    fill: #126b3c;
}

.reciproque-compare-figure__result rect {
    fill: #ffffff;
    stroke-width: 2.5;
}

.reciproque-compare-figure__result--largest rect {
    stroke: #178a4b;
}

.reciproque-compare-figure__result--sum rect {
    stroke: #f4b942;
}

.reciproque-compare-figure__result text {
    fill: #173a61;
    font-size: 18px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-compare-figure__result text:first-of-type {
    fill: #087d73;
    font-size: 14px;
    text-transform: uppercase;
}

.reciproque-compare-figure__comparison rect {
    fill: #fff8e8;
    stroke: #f4b942;
    stroke-width: 3;
}

.reciproque-compare-figure__comparison text {
    fill: #173a61;
    font-size: 30px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-compare-figure__symbol {
    fill: #c07b00;
    font-size: 36px;
}

.reciproque-compare-figure__comparison--correct rect {
    fill: #e5f6ed;
    stroke: #178a4b;
}

.reciproque-compare-figure__comparison--correct
.reciproque-compare-figure__symbol {
    fill: #126b3c;
}

.reciproque-compare-figure__badge rect {
    fill: #e5f6ed;
    stroke: #178a4b;
    stroke-width: 2;
}

.reciproque-compare-figure__badge text {
    fill: #126b3c;
    font-size: 17px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-compare-figure__badge[hidden] {
    display: none;
}

.reciproque-compare-challenge {
    padding: 1.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(145deg, #f0fbfa, #fff8e8);
    border: 1px solid rgba(30, 58, 95, 0.12);
}

.reciproque-compare-challenge h3 {
    margin-top: 0.35rem;
}

.reciproque-compare-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
    margin-top: 1.25rem;
}

.reciproque-compare-option {
    min-height: 64px;
    border: 2px solid rgba(30, 58, 95, 0.18);
    border-radius: 0.9rem;
    background: #ffffff;
    color: #173a61;
    font-size: 2rem;
    font-weight: 900;
    cursor: pointer;
    transition: transform 160ms ease, border-color 160ms ease;
}

.reciproque-compare-option:hover:not(:disabled),
.reciproque-compare-option:focus-visible {
    transform: translateY(-2px);
    border-color: #0f9f91;
}

.reciproque-compare-option--correct {
    color: #126b3c;
    background: #e5f6ed;
    border-color: #178a4b;
}

.reciproque-compare-option--incorrect {
    color: #922f3f;
    background: #fff0f2;
    border-color: #c43d4f;
}

.reciproque-compare-feedback {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 0.9rem;
}

.reciproque-compare-feedback[hidden] {
    display: none;
}

.reciproque-compare-feedback h4 {
    margin: 0 0 0.35rem;
}

.reciproque-compare-feedback p {
    margin: 0;
}

.reciproque-compare-feedback--success {
    color: #126b3c;
    background: #e5f6ed;
    border: 1px solid rgba(23, 138, 75, 0.35);
}

.reciproque-compare-feedback--error {
    color: #922f3f;
    background: #fff0f2;
    border: 1px solid rgba(196, 61, 79, 0.35);
}

@media (max-width: 940px) {
    .reciproque-compare-card {
        grid-template-columns: 1fr;
    }
}

/* RECIPROQUE PYTHAGORE - CONCLUSION */
.reciproque-conclusion-card {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(290px, 0.7fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    padding: clamp(1.25rem, 4vw, 2.5rem);
}

.reciproque-conclusion-case[hidden] {
    display: none;
}

.reciproque-conclusion-case__heading {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.reciproque-conclusion-case__heading span {
    color: #087d73;
    font-weight: 800;
    text-transform: uppercase;
}

.reciproque-conclusion-case svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-conclusion-figure__triangle {
    fill: #eff8e9;
    stroke: #1e3a5f;
    stroke-width: 8;
    stroke-linejoin: round;
}

.reciproque-conclusion-figure__largest-side {
    stroke: #178a4b;
    stroke-width: 13;
    stroke-linecap: round;
}

.reciproque-conclusion-figure__point {
    fill: #1e3a5f;
}

.reciproque-conclusion-figure__side-label {
    fill: #1e3a5f;
    font-size: 20px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-conclusion-figure__side-label--largest {
    fill: #126b3c;
}

.reciproque-conclusion-figure__calculation rect {
    fill: #ffffff;
    stroke: #0f9f91;
    stroke-width: 2.5;
}

.reciproque-conclusion-figure__calculation text {
    fill: #173a61;
    font-size: 18px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-conclusion-figure__right-angle path {
    fill: none;
    stroke: #f4b942;
    stroke-width: 10;
    stroke-linejoin: round;
}

.reciproque-conclusion-figure__right-angle[hidden],
.reciproque-conclusion-figure__badge[hidden] {
    display: none;
}

.reciproque-conclusion-figure__badge rect {
    stroke-width: 2;
}

.reciproque-conclusion-figure__badge text {
    font-size: 17px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-conclusion-figure__badge--success rect {
    fill: #e5f6ed;
    stroke: #178a4b;
}

.reciproque-conclusion-figure__badge--success text {
    fill: #126b3c;
}

.reciproque-conclusion-figure__badge--error rect {
    fill: #fff0f2;
    stroke: #c43d4f;
}

.reciproque-conclusion-figure__badge--error text {
    fill: #922f3f;
}

.reciproque-conclusion-challenge {
    padding: 1.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(145deg, #f0fbfa, #fff8e8);
    border: 1px solid rgba(30, 58, 95, 0.12);
}

.reciproque-conclusion-challenge h3 {
    margin-top: 0.35rem;
}

.reciproque-conclusion-options {
    display: grid;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.reciproque-conclusion-option {
    padding: 0.9rem 1rem;
    border: 2px solid rgba(30, 58, 95, 0.18);
    border-radius: 0.9rem;
    background: #ffffff;
    color: #173a61;
    font-weight: 800;
    cursor: pointer;
    text-align: left;
}

.reciproque-conclusion-option:hover:not(:disabled),
.reciproque-conclusion-option:focus-visible {
    border-color: #0f9f91;
}

.reciproque-conclusion-option--correct {
    color: #126b3c;
    background: #e5f6ed;
    border-color: #178a4b;
}

.reciproque-conclusion-option--incorrect {
    color: #922f3f;
    background: #fff0f2;
    border-color: #c43d4f;
}

.reciproque-conclusion-feedback {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 0.9rem;
    font-weight: 700;
}

.reciproque-conclusion-feedback[hidden] {
    display: none;
}

.reciproque-conclusion-feedback--success {
    color: #126b3c;
    background: #e5f6ed;
    border: 1px solid rgba(23, 138, 75, 0.35);
}

.reciproque-conclusion-feedback--error {
    color: #922f3f;
    background: #fff0f2;
    border: 1px solid rgba(196, 61, 79, 0.35);
}

.reciproque-conclusion-hint {
    margin-top: 1rem;
    padding: 1rem;
    border-left: 4px solid #f4b942;
    border-radius: 0.75rem;
    background: #fff8e8;
}

.reciproque-conclusion-hint p {
    margin: 0.35rem 0 0;
}

@media (max-width: 940px) {
    .reciproque-conclusion-card {
        grid-template-columns: 1fr;
    }
}

/* RECIPROQUE PYTHAGORE - DEFI FINAL */
.reciproque-final-pythagore-card {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: center;
    padding: clamp(1.25rem, 4vw, 2.5rem);
}

.reciproque-final-pythagore-case[hidden] {
    display: none;
}

.reciproque-final-pythagore-case__heading {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.reciproque-final-pythagore-case__heading span {
    color: #087d73;
    font-weight: 800;
    text-transform: uppercase;
}

.reciproque-final-pythagore-case svg {
    display: block;
    width: 100%;
    height: auto;
}

.reciproque-final-pythagore-figure__triangle {
    fill: #eff8e9;
    stroke: none;
}

.reciproque-final-pythagore-figure__side {
    stroke: #1e3a5f;
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke 180ms ease, stroke-width 180ms ease;
}

.reciproque-final-pythagore-figure__side--largest {
    stroke: #178a4b;
    stroke-width: 14;
}

.reciproque-final-pythagore-figure__point {
    fill: #1e3a5f;
}

.reciproque-final-pythagore-figure__side-label {
    fill: #173a61;
    font-size: 20px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-final-pythagore-figure__badge rect {
    fill: #e5f6ed;
    stroke: #178a4b;
    stroke-width: 2;
}

.reciproque-final-pythagore-figure__badge text {
    fill: #126b3c;
    font-size: 17px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-final-pythagore-figure__calculation rect {
    fill: #ffffff;
    stroke: #0f9f91;
    stroke-width: 2.5;
}

.reciproque-final-pythagore-figure__calculation--sum rect {
    fill: #fff8e8;
    stroke: #f4b942;
}

.reciproque-final-pythagore-figure__calculation text {
    fill: #173a61;
    font-size: 17px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-final-pythagore-figure__calculation text:first-of-type {
    fill: #087d73;
    font-size: 13px;
    text-transform: uppercase;
}

.reciproque-final-pythagore-figure__comparison rect {
    fill: #e5f6ed;
    stroke: #178a4b;
    stroke-width: 3;
}

.reciproque-final-pythagore-figure__comparison text {
    fill: #126b3c;
    font-size: 25px;
    font-weight: 900;
    text-anchor: middle;
}

.reciproque-final-pythagore-figure__comparison--different rect {
    fill: #fff0f2;
    stroke: #c43d4f;
}

.reciproque-final-pythagore-figure__comparison--different text {
    fill: #922f3f;
}

.reciproque-final-pythagore-figure__right-angle path {
    fill: none;
    stroke: #f4b942;
    stroke-width: 10;
    stroke-linejoin: round;
}

.reciproque-final-pythagore-figure__conclusion rect {
    stroke-width: 2;
}

.reciproque-final-pythagore-figure__conclusion text {
    font-size: 17px;
    font-weight: 800;
    text-anchor: middle;
}

.reciproque-final-pythagore-figure__conclusion--success rect {
    fill: #e5f6ed;
    stroke: #178a4b;
}

.reciproque-final-pythagore-figure__conclusion--success text {
    fill: #126b3c;
}

.reciproque-final-pythagore-figure__conclusion--error rect {
    fill: #fff0f2;
    stroke: #c43d4f;
}

.reciproque-final-pythagore-figure__conclusion--error text {
    fill: #922f3f;
}

.reciproque-final-pythagore-figure__badge[hidden],
.reciproque-final-pythagore-figure__calculation[hidden],
.reciproque-final-pythagore-figure__comparison[hidden],
.reciproque-final-pythagore-figure__right-angle[hidden],
.reciproque-final-pythagore-figure__conclusion[hidden] {
    display: none;
}

.reciproque-final-pythagore-challenge {
    padding: 1.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(145deg, #f0fbfa, #fff8e8);
    border: 1px solid rgba(30, 58, 95, 0.12);
}

.reciproque-final-pythagore-challenge h3 {
    margin-top: 0.35rem;
}

.reciproque-final-pythagore-options {
    display: grid;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.reciproque-final-pythagore-option {
    padding: 0.9rem 1rem;
    border: 2px solid rgba(30, 58, 95, 0.18);
    border-radius: 0.9rem;
    background: #ffffff;
    color: #173a61;
    font-weight: 800;
    cursor: pointer;
    text-align: center;
}

.reciproque-final-pythagore-option:hover:not(:disabled),
.reciproque-final-pythagore-option:focus-visible {
    border-color: #0f9f91;
}

.reciproque-final-pythagore-option--correct {
    color: #126b3c;
    background: #e5f6ed;
    border-color: #178a4b;
}

.reciproque-final-pythagore-option--incorrect {
    color: #922f3f;
    background: #fff0f2;
    border-color: #c43d4f;
}

.reciproque-final-pythagore-feedback {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 0.9rem;
    font-weight: 700;
}

.reciproque-final-pythagore-feedback[hidden] {
    display: none;
}

.reciproque-final-pythagore-feedback--success {
    color: #126b3c;
    background: #e5f6ed;
    border: 1px solid rgba(23, 138, 75, 0.35);
}

.reciproque-final-pythagore-feedback--error {
    color: #922f3f;
    background: #fff0f2;
    border: 1px solid rgba(196, 61, 79, 0.35);
}

.reciproque-final-pythagore-method {
    margin-top: 1rem;
    padding: 1rem;
    border-left: 4px solid #f4b942;
    border-radius: 0.75rem;
    background: #fff8e8;
}

.reciproque-final-pythagore-method ol {
    margin-bottom: 0;
    padding-left: 1.2rem;
}

.reciproque-final-pythagore-summary {
    margin-top: clamp(2rem, 5vw, 4rem);
}

.reciproque-final-pythagore-summary__heading {
    margin-bottom: 1.25rem;
}

.reciproque-final-pythagore-summary__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.reciproque-final-pythagore-summary__grid article {
    padding: 1.25rem;
}

.reciproque-final-pythagore-summary__grid article > span {
    display: grid;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.75rem;
    background: #e5f6ed;
    color: #126b3c;
    font-weight: 900;
}

.reciproque-final-pythagore-summary__grid h3 {
    margin: 0.9rem 0 0.35rem;
}

@media (max-width: 980px) {
    .reciproque-final-pythagore-card {
        grid-template-columns: 1fr;
    }

    .reciproque-final-pythagore-summary__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .reciproque-final-pythagore-case__heading {
        flex-direction: column;
    }

    .reciproque-final-pythagore-summary__grid {
        grid-template-columns: 1fr;
    }
}
.site-footer__meta{display:grid;gap:.65rem;text-align:right}.site-footer__legal{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:.55rem 1rem}.site-footer__legal a{color:#fff;font-size:14px;font-weight:750;text-underline-offset:3px}.site-footer__legal a:hover,.site-footer__legal a:focus-visible{color:#dff7f4}@media(max-width:860px){.site-footer__meta{text-align:left}.site-footer__legal{justify-content:flex-start}}