/* ============================================================
   PLATEFORME EXERCICES — SYSTÈME DE DESIGN
   Signature : la "copie corrigée" (quadrillage, stylo rouge, note /20)
   ============================================================ */

:root {
    /* Couleurs */
    --ink: #12172E;
    --ink-soft: #4A5578;
    --ink-line: rgba(244, 245, 247, 0.08);
    --paper: #F4F5F7;
    --paper-raised: #FFFFFF;
    --paper-line: #E1E4EA;
    --crimson: #D7263D;
    --crimson-dark: #B01F32;
    --teal: #12B8A9;
    --teal-dark: #0E9488;
    --gold: #F5A623;
    --text: #171B2E;
    --royal: #2563EB;
    --royal-dark: #1D4ED8;
    --text-muted: #5B6178;

    /* Typo */
    --font-display: "Unbounded", sans-serif;
    --font-body: "Inter", system-ui, sans-serif;
    --font-mono: "JetBrains Mono", monospace;

    /* Echelle */
    --radius-s: 8px;
    --radius-m: 14px;
    --radius-l: 22px;
    --shadow-card: 0 1px 2px rgba(18,23,46,0.06), 0 8px 24px rgba(18,23,46,0.08);
    --shadow-card-hover: 0 4px 10px rgba(18,23,46,0.08), 0 16px 40px rgba(18,23,46,0.14);
    --container: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--text);
    background: var(--paper);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display {
    font-family: var(--font-display);
    line-height: 1.08;
    letter-spacing: -0.01em;
    margin: 0;
}

.mono { font-family: var(--font-mono); }

a { color: inherit; }

::selection { background: var(--crimson); color: white; }

:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 2px;
    border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }
.container-etroit { max-width: 480px; }

.section { padding: 5rem 0; }
.section-tight { padding: 3rem 0; }

/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.1rem 1.5rem;
    background: var(--ink);
    color: #fff;
}

.navbar .brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    text-decoration: none;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar .brand .brand-mark {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: linear-gradient(135deg, var(--crimson), var(--gold));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--ink);
}

.nav-links { display: flex; align-items: center; gap: 0.5rem; }

.nav-links a, .nav-links .lien-bouton {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    padding: 0.55rem 0.9rem;
    border-radius: var(--radius-s);
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    transition: background 0.15s ease, color 0.15s ease;
}

.nav-links a:hover, .nav-links .lien-bouton:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

.nav-links a.nav-cta {
    background: var(--crimson);
    color: #fff;
}
.nav-links a.nav-cta:hover { background: var(--crimson-dark); }

/* ============================================================
   BOUTONS
   ============================================================ */

.bouton-principal, .bouton-secondaire, button[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius-s);
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.bouton-principal, button[type="submit"] {
    background: var(--crimson);
    color: #fff;
    box-shadow: 0 2px 0 var(--crimson-dark);
}
.bouton-principal:hover, button[type="submit"]:hover {
    background: var(--crimson-dark);
    transform: translateY(-1px);
}
.bouton-principal:active, button[type="submit"]:active { transform: translateY(1px); box-shadow: none; }

.bouton-secondaire {
    background: transparent;
    color: var(--text);
    border: 1.5px solid var(--paper-line);
}
.bouton-secondaire:hover { border-color: var(--ink); }

.bouton-secondaire.sur-fond-sombre {
    color: #fff;
    border-color: rgba(255,255,255,0.25);
}
.bouton-secondaire.sur-fond-sombre:hover { border-color: #fff; }

/* ============================================================
   HERO — la zone la plus caractéristique de la page
   ============================================================ */

.hero {
    position: relative;
    background: var(--ink);
    color: #fff;
    overflow: hidden;
    padding: 4.5rem 0 6rem;
}

/* Quadrillage subtil — clin d'œil au cahier de maths, réservé au hero */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--ink-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--ink-line) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: radial-gradient(ellipse 80% 60% at 30% 20%, black 40%, transparent 90%);
    pointer-events: none;
}

.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
    align-items: center;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--gold);
    background: rgba(245,166,35,0.12);
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 700;
    margin-bottom: 1.3rem;
}
.hero h1 .accent { color: var(--gold); }

.hero p.lead {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.72);
    max-width: 34rem;
    margin-bottom: 2.2rem;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* La carte "copie corrigée" — élément signature */
.copie-card {
    position: relative;
    background: var(--paper-raised);
    color: var(--text);
    border-radius: var(--radius-l);
    padding: 1.75rem;
    box-shadow: 0 30px 60px rgba(0,0,0,0.35);
    transform: rotate(2deg);
    max-width: 360px;
    margin-left: auto;
}

.copie-card::before {
    content: "";
    position: absolute;
    inset: 10px;
    border: 1.5px dashed var(--paper-line);
    border-radius: calc(var(--radius-l) - 6px);
    pointer-events: none;
}

.copie-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.copie-titre {
    font-family: var(--font-display);
    font-size: 1.05rem;
    margin-bottom: 0.6rem;
}

.copie-enonce {
    font-size: 0.9rem;
    color: var(--text-muted);
    background: var(--paper);
    border-radius: var(--radius-s);
    padding: 0.75rem 0.9rem;
    margin-bottom: 1.1rem;
}

.copie-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px dashed var(--paper-line);
}

.copie-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--teal-dark);
    font-weight: 600;
    font-size: 0.92rem;
}

.copie-check svg { width: 26px; height: 26px; }
.copie-check svg path {
    stroke-dasharray: 40;
    stroke-dashoffset: 40;
    animation: dessiner-check 0.6s ease forwards 0.9s;
}
@keyframes dessiner-check { to { stroke-dashoffset: 0; } }

.copie-note {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--crimson);
}
.copie-note::after { content: "/20"; font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }

.copie-card { animation: apparition-carte 0.7s ease both 0.15s; }
@keyframes apparition-carte {
    from { opacity: 0; transform: rotate(2deg) translateY(24px); }
    to { opacity: 1; transform: rotate(2deg) translateY(0); }
}

/* ============================================================
   REVEAL AU SCROLL
   ============================================================ */

[data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-reveal].in-view { opacity: 1; transform: translateY(0); }

/* ============================================================
   MATIÈRES (cartes)
   ============================================================ */

.matieres-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.carte-matiere {
    background: var(--paper-raised);
    border-radius: var(--radius-m);
    padding: 2rem;
    box-shadow: var(--shadow-card);
    border-top: 4px solid var(--paper-line);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.carte-matiere:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.carte-matiere.francais { border-top-color: var(--crimson); }
.carte-matiere.mathematiques { border-top-color: var(--teal); }
.carte-matiere.anglais { border-top-color: var(--royal); }

.carte-matiere .icone {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    display: inline-block;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-weight: 700;
}
.carte-matiere.francais .icone { background: rgba(215,38,61,0.1); color: var(--crimson); }
.carte-matiere.mathematiques .icone { background: rgba(18,184,169,0.12); color: var(--teal-dark); }
.carte-matiere.anglais .icone { background: rgba(37,99,235,0.1); color: var(--royal); }

.carte-matiere h3 { font-size: 1.3rem; margin-bottom: 0.6rem; }
.carte-matiere p { color: var(--text-muted); margin-bottom: 1.3rem; font-size: 0.95rem; }
.carte-matiere .lien-matiere {
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}
.carte-matiere.francais .lien-matiere { color: var(--crimson); }
.carte-matiere.mathematiques .lien-matiere { color: var(--teal-dark); }
.carte-matiere.anglais .lien-matiere { color: var(--royal-dark); }

/* ============================================================
   ÉTAPES (numérotées — le parcours est une vraie séquence)
   ============================================================ */

.etapes {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.25rem;
}

.etape { position: relative; padding-top: 1rem; }
.etape .numero {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--crimson);
    font-weight: 700;
    display: block;
    margin-bottom: 0.6rem;
}
.etape h4 { font-family: var(--font-body); font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.etape p { font-size: 0.87rem; color: var(--text-muted); margin: 0; }

/* ============================================================
   FORMULAIRES
   ============================================================ */

.carte-formulaire {
    background: var(--paper-raised);
    border-radius: var(--radius-l);
    padding: 2.5rem;
    box-shadow: var(--shadow-card);
}

.formulaire { display: flex; flex-direction: column; }
.formulaire label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    margin-top: 0.9rem;
}
.formulaire label:first-of-type { margin-top: 0; }

.formulaire input, .formulaire select {
    padding: 0.75rem 0.9rem;
    border: 1.5px solid var(--paper-line);
    border-radius: var(--radius-s);
    font-family: var(--font-body);
    font-size: 0.95rem;
    background: var(--paper);
    transition: border-color 0.15s ease, background 0.15s ease;
}
.formulaire input:focus, .formulaire select:focus {
    border-color: var(--crimson);
    background: #fff;
    outline: none;
}

.formulaire button[type="submit"] { margin-top: 1.6rem; }

.erreur {
    color: var(--crimson);
    font-size: 0.85rem;
    margin: 0.3rem 0 0;
}
.info { color: var(--teal-dark); font-size: 0.9rem; }
.note { color: var(--text-muted); font-size: 0.87rem; margin-top: 1.2rem; }

/* ============================================================
   TABLEAUX (admin)
   ============================================================ */

.panneau {
    background: var(--paper-raised);
    border-radius: var(--radius-m);
    padding: 1.75rem;
    box-shadow: var(--shadow-card);
    margin-bottom: 2rem;
}

.panneau h2 {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1.2rem;
}

.table { width: 100%; border-collapse: collapse; }
.table th {
    text-align: left;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    padding: 0.6rem 0.8rem;
    border-bottom: 2px solid var(--paper-line);
}
.table td {
    padding: 0.8rem;
    border-bottom: 1px solid var(--paper-line);
    font-size: 0.92rem;
}
.table tr:last-child td { border-bottom: none; }

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.6rem;
    height: 1.6rem;
    padding: 0 0.5rem;
    background: var(--crimson);
    color: #fff;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

/* ============================================================
   ADMIN — sous-nav & formulaires compacts
   ============================================================ */

.admin-subnav {
    background: var(--paper-raised);
    border-bottom: 1px solid var(--paper-line);
    padding: 0.8rem 1.5rem;
    display: flex;
    gap: 1.5rem;
}
.admin-subnav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}
.admin-subnav a:hover { color: var(--crimson); }

.fil-ariane {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1.2rem;
}
.fil-ariane a { color: var(--crimson); text-decoration: none; }

.grille-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 1rem;
}
.grille-form .pleine-largeur { grid-column: 1 / -1; }

.liste-items {
    list-style: none;
    margin: 0 0 1.5rem;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.item-ligne {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.1rem;
    background: var(--paper);
    border-radius: var(--radius-s);
    border: 1px solid var(--paper-line);
    text-decoration: none;
    color: var(--text);
}
.item-ligne:hover { border-color: var(--crimson); }
.item-ligne .meta { font-size: 0.8rem; color: var(--text-muted); }

.proposition-champ {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.5rem;
}
.proposition-champ input[type="text"] { flex: 1; margin-bottom: 0; }
.proposition-champ label { margin: 0; font-size: 0.8rem; white-space: nowrap; }

/* ============================================================
   QUIZ ÉLÈVE
   ============================================================ */

.quiz-progress {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.quiz-progress-bar {
    height: 6px;
    background: var(--paper-line);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 2rem;
}
.quiz-progress-bar > span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--crimson), var(--gold));
    border-radius: 999px;
    transition: width 0.4s ease;
}

.quiz-enonce {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: 1.6rem;
}

.choix-liste { display: flex; flex-direction: column; gap: 0.7rem; margin-bottom: 1.6rem; }
.choix-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 1.1rem;
    border: 1.5px solid var(--paper-line);
    border-radius: var(--radius-s);
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}
.choix-item:hover { border-color: var(--crimson); background: #fff; }
.choix-item input { accent-color: var(--crimson); }

.choix-item.correcte { border-color: var(--teal); background: rgba(18,184,169,0.08); }
.choix-item.incorrecte { border-color: var(--crimson); background: rgba(215,38,61,0.06); }

.feedback {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 1rem 1.2rem;
    border-radius: var(--radius-s);
    font-weight: 600;
    margin-bottom: 1.2rem;
    animation: feedback-entree 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.feedback.correct {
    background: rgba(18,184,169,0.12);
    color: var(--teal-dark);
    animation: feedback-entree 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both,
               feedback-glow-ok 1.5s ease 0.5s both;
}
.feedback.incorrect {
    background: rgba(215,38,61,0.1);
    color: var(--crimson);
    animation: feedback-entree 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both,
               feedback-shake 0.5s ease 0.5s both;
}

@keyframes feedback-entree {
    from { opacity: 0; transform: translateY(-20px) scale(0.9); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes feedback-glow-ok {
    0%   { box-shadow: 0 0 0 0 rgba(18,184,169,0.4); }
    50%  { box-shadow: 0 0 20px 8px rgba(18,184,169,0.2); }
    100% { box-shadow: 0 0 0 0 rgba(18,184,169,0); }
}
@keyframes feedback-shake {
    0%, 100% { transform: translateX(0); }
    15%      { transform: translateX(-8px); }
    30%      { transform: translateX(7px); }
    45%      { transform: translateX(-5px); }
    60%      { transform: translateX(4px); }
    75%      { transform: translateX(-2px); }
}

/* Note dictée : entrée spectaculaire */
.note-dictee-hero {
    animation: note-pop 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) both 0.3s;
}
@keyframes note-pop {
    0%   { opacity: 0; transform: scale(0.3) rotate(-8deg); }
    60%  { transform: scale(1.1) rotate(2deg); }
    100% { opacity: 1; transform: scale(1) rotate(0); }
}

/* Encouragement qui pulse */
.encouragement {
    display: block;
    margin-top: 0.3rem;
    animation: encouragement-in 0.5s ease both 0.8s;
}
@keyframes encouragement-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Confetti canvas — plein écran fixe, derrière les interactions */
#confetti-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 100;
}

/* Carte question : entrée douce */
.carte-question-entree {
    animation: carte-slide-in 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes carte-slide-in {
    from { opacity: 0; transform: translateY(30px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* TTS buttons — style moderne */
.tts-controls {
    display: flex;
    gap: 0.6rem;
    margin-bottom: 1.2rem;
}
.btn-tts {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.75rem 1.1rem;
    border: 1.5px solid var(--paper-line);
    border-radius: var(--radius-s);
    background: var(--paper-raised);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    transition: all 0.2s ease;
}
.btn-tts:hover {
    border-color: var(--crimson);
    color: var(--crimson);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(215,38,61,0.15);
}
.btn-tts:active { transform: translateY(0); }
.btn-tts-normal svg { color: var(--crimson); }
.btn-tts-slow svg { color: var(--gold); }

/* Résultat : carte entrée spectaculaire */
.carte-resultat-entree {
    animation: resultat-entree 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes resultat-entree {
    from { opacity: 0; transform: translateY(40px) scale(0.92); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.resultat-label-entree {
    animation: encouragement-in 0.4s ease both 0.2s;
}

/* Score pop spectaculaire */
.resultat-score-pop {
    animation: note-pop 0.7s cubic-bezier(0.34, 1.56, 0.64, 1) both 0.4s;
}

.resultat-note-chiffre {
    font-size: 3rem;
    font-weight: 700;
}

/* Detail panneau : slide in */
.detail-panneau-entree {
    animation: carte-slide-in 0.5s cubic-bezier(0.22, 1, 0.36, 1) both 0.3s;
}

/* Detail lignes : apparition échelonnée */
.detail-ligne-entree {
    opacity: 0;
    animation: detail-ligne-in 0.35s ease both;
    animation-delay: calc(0.5s + var(--delay, 0s));
}
@keyframes detail-ligne-in {
    from { opacity: 0; transform: translateX(-12px); }
    to   { opacity: 1; transform: translateX(0); }
}

.explication {
    background: var(--paper);
    border-radius: var(--radius-s);
    padding: 1rem 1.2rem;
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-bottom: 1.6rem;
}

/* ============================================================
   RÉSULTAT
   ============================================================ */

.resultat-score {
    font-family: var(--font-mono);
    font-size: 3.4rem;
    font-weight: 700;
    color: var(--crimson);
    text-align: center;
    margin: 1rem 0 0.3rem;
}
.resultat-score span { font-size: 1.4rem; color: var(--text-muted); font-weight: 500; }

/* ============================================================
   PROGRESSION (F5)
   ============================================================ */

.progression-ligne {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.1rem;
    background: var(--paper);
    border-radius: var(--radius-s);
    border: 1px solid var(--paper-line);
    margin-bottom: 0.6rem;
    text-decoration: none;
    color: var(--text);
}
.progression-ligne .infos { display: flex; flex-direction: column; gap: 0.15rem; }
.progression-ligne .matiere-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
}
.progression-ligne .chapitre-label { font-weight: 600; }
.progression-ligne .derniere-activite { font-size: 0.8rem; color: var(--text-muted); }

.taux-badge {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    white-space: nowrap;
}
.taux-bon { background: rgba(18,184,169,0.14); color: var(--teal-dark); }
.taux-moyen { background: rgba(245,166,35,0.16); color: #8a5a00; }
.taux-faible { background: rgba(215,38,61,0.1); color: var(--crimson); }

.historique-ligne {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.1rem;
    border-bottom: 1px solid var(--paper-line);
    font-size: 0.92rem;
}
.historique-ligne:last-child { border-bottom: none; }
.historique-ligne .date { color: var(--text-muted); font-family: var(--font-mono); font-size: 0.82rem; }
.historique-ligne .score { font-family: var(--font-mono); font-weight: 700; }

.etat-vide {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--text-muted);
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
    padding: 2.5rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--paper-line);
}

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

@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; }
    .copie-card { margin: 0 auto; max-width: 100%; }
    .matieres-grid { grid-template-columns: 1fr; }
    .etapes { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
    .navbar { padding: 0.9rem 1rem; }
    .nav-links { gap: 0.15rem; }
    .nav-links a, .nav-links .lien-bouton { padding: 0.5rem 0.6rem; font-size: 0.85rem; }
    .etapes { grid-template-columns: 1fr; }
    .carte-formulaire { padding: 1.5rem; }
}