/* ==========================================
   VARIABLES & BASE
   ========================================== */
:root {
    --cream: #FDFBF7;
    --border: #EFECE6;
    --border-strong: #d8cebf;
    --ink: #2C2C2C;
    --terracotta: #A45A52;
    --terracotta-dark: #8c4c45;
    --blue: #79a8e0;
    --green: #81bc44;
    --muted: #888888;
    --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    --font-hanzi: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

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

body {
    background-color: var(--cream);
    color: var(--ink);
    margin: 0;
    font-family: var(--font-ui);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================
   NAVBAR
   ========================================== */
nav {
    background-color: var(--cream);
    padding: 20px 40px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    align-items: center;
    position: relative;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 35px;
}

nav ul li a {
    text-decoration: none;
    color: var(--ink);
    font-size: 18px;
    font-weight: 500;
    transition: color 0.2s ease;
}

nav ul li a:hover,
nav ul li a:focus-visible {
    color: var(--terracotta);
}

/* Burger (caché sur grand écran) */
.burger-menu {
    display: none;
    cursor: pointer;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
}

.burger-menu span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--ink);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ==========================================
   PAGE D'ACCUEIL (HOME)
   ========================================== */
.home-container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
    width: 100%;
}

.home-hero {
    text-align: center;
    margin-bottom: 60px;
    padding: 20px 0;
}

.home-badge {
    display: inline-block;
    background-color: #ffffff;
    color: var(--terracotta);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01);
}

.home-hero h1 {
    color: var(--ink);
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 20px 0;
}

.home-hero h1 span {
    color: var(--terracotta);
}

.home-hero p {
    color: var(--muted);
    font-size: 18px;
    line-height: 1.6;
    max-width: 650px;
    margin: 0 auto 35px auto;
}

/* Boutons de la section Hero */
.home-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-terracotta {
    display: inline-block;
    background-color: var(--terracotta);
    color: #ffffff;
    text-decoration: none;
    padding: 12px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.2s ease, transform 0.2s ease;
    box-shadow: 0 4px 10px rgba(164, 90, 82, 0.2);
}

.btn-terracotta:hover {
    background-color: var(--terracotta-dark);
    transform: translateY(-2px);
}

.btn-outline {
    display: inline-block;
    background-color: #ffffff;
    color: var(--ink);
    text-decoration: none;
    padding: 12px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    border: 1px solid var(--border);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01);
    transition: all 0.2s ease;
}

.btn-outline:hover {
    border-color: var(--terracotta);
    color: var(--terracotta);
    transform: translateY(-2px);
}

/* Grille des fonctionnalités */
.home-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 50px;
}

.feature-card {
    background-color: #ffffff;
    border: 1px solid var(--border);
    padding: 30px 20px;
    border-radius: 16px;
    text-decoration: none;
    text-align: center;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
    border-color: var(--border-strong);
}

.feature-icon {
    font-size: 32px;
    display: block;
    margin-bottom: 15px;
}

.feature-card h3 {
    color: var(--ink);
    font-size: 18px;
    margin: 0 0 10px 0;
}

.feature-card p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

@media screen and (max-width: 768px) {
    .home-hero h1 {
        font-size: 32px;
    }
}
/* ==========================================
   MINI-JEUX & QCM
   ========================================== */

/* Carte principale du jeu */
.quiz-card {
    background-color: #ffffff;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px 30px;
    max-width: 700px;
    margin: 0 auto 50px auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

/* Question et consignes */
#quiz-target {
    color: var(--ink);
    font-size: 40px;
    font-weight: 700;
    margin: 0 0 8px 0;
}

#quiz-instruction {
    color: var(--muted);
    font-size: 16px;
    margin: 0 0 25px 0;
}

/* Grille des choix du QCM */
.quiz-options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 2 colonnes bien alignées */
    gap: 16px; /* Espace entre les choix */
    margin-top: 20px;
}

/* Style des boutons/cartes QCM */
.quiz-option-btn {
    background-color: #ffffff;
    border: 2px solid var(--border);
    border-radius: 14px;
    color: var(--ink);
    padding: 16px 20px;
    font-size: 18px;
    font-weight: 500;
    font-family: var(--font-ui);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 65px;
    width: 100%;
}

/* Effet au survol des cartes */
.quiz-option-btn:hover:not(:disabled) {
    border-color: var(--terracotta);
    background-color: var(--cream);
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(164, 90, 82, 0.1);
}

/* Style quand le bouton contient des sinogrammes (Hanzi) */
.quiz-option-btn[style*="font-family"] {
    font-size: 32px !important;
    font-family: var(--font-hanzi) !important;
}

/* État désactivé après sélection */
.quiz-option-btn:disabled {
    cursor: default;
    opacity: 0.95;
}

/* Zone d'écriture du Pinyin */
#user-pinyin-input {
    width: 100%;
    max-width: 380px;
    padding: 14px 20px;
    border-radius: 12px;
    border: 2px solid var(--border);
    outline: none;
    font-size: 18px;
    font-family: var(--font-ui);
    color: var(--ink);
    background-color: var(--cream);
    transition: all 0.2s ease;
    text-align: center;
}

#user-pinyin-input:focus {
    border-color: var(--terracotta);
    box-shadow: 0 0 0 4px rgba(164, 90, 82, 0.1);
}

/* Responsive pour les écrans mobiles */
@media screen and (max-width: 600px) {
    .quiz-card {
        padding: 25px 20px;
    }

    .quiz-options-grid {
        grid-template-columns: 1fr; /* Passage sur 1 seule colonne sur mobile */
        gap: 12px;
    }

    #quiz-target {
        font-size: 32px;
    }
}
/* ==========================================
   DICTIONNAIRE
   ========================================== */
.dictionary-container {
    padding: 40px 20px 0;
    display: flex;
    justify-content: center;
}

.dictionary-main {
    max-width: 1000px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.dictionary-header {
    background-color: #ffffff;
    padding: 25px 35px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.dictionary-titles h2 {
    color: var(--ink);
    font-size: 22px;
    margin: 0 0 4px 0;
}

.subtitle {
    color: #999999;
    font-size: 13px;
    margin: 0;
}

.search-box-wrapper {
    flex: 0 0 300px;
}

#searchInput {
    width: 100%;
    padding: 12px 18px;
    border-radius: 12px;
    border: 1px solid var(--border);
    outline: none;
    font-size: 14px;
    font-family: inherit;
    color: var(--ink);
    background-color: var(--cream);
    transition: all 0.2s ease;
}

#searchInput:focus {
    border-color: var(--terracotta);
    box-shadow: 0 0 0 3px rgba(164, 90, 82, 0.1);
}

/* Unités (chapitres) */
.unit {
    background-color: #ffffff;
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01);
    overflow: hidden;
}

.unit + .unit {
    margin-top: 0;
}

.unit-summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 24px;
    user-select: none;
}

.unit-summary::-webkit-details-marker { display: none; }

.unit-number {
    flex-shrink: 0;
    background-color: var(--terracotta);
    color: #ffffff;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 5px 12px;
    border-radius: 20px;
}

.unit-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
}

.unit-count {
    margin-left: auto;
    font-size: 13px;
    color: var(--muted);
}

.unit-summary::after {
    content: "▾";
    color: var(--muted);
    transition: transform 0.2s ease;
}

.unit:not([open]) .unit-summary::after {
    transform: rotate(-90deg);
}

.unit[open] .unit-summary {
    border-bottom: 1px solid var(--border);
}

.unit .dictionary-grid {
    padding: 24px;
    background-color: var(--cream);
}

.dictionary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 20px;
}

.hanzi-card {
    background-color: #ffffff;
    padding: 24px 15px;
    border-radius: 16px;
    border: 1px solid var(--border);
    cursor: pointer;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 0;
    transition: all 0.25s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01);
}

.hanzi-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
}

.hanzi-char {
    font-size: 40px;
    font-family: var(--font-hanzi);
    color: var(--ink);
    font-weight: bold;
    line-height: 1.1;
    transition: color 0.2s ease;
}

.hanzi-card:hover .hanzi-char {
    color: var(--terracotta);
}

.hanzi-pinyin {
    font-size: 14px;
    color: var(--terracotta);
    font-weight: bold;
    margin: 0;
}

.hanzi-meaning {
    font-size: 12px;
    color: var(--muted);
    margin: 0;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==========================================
   MODALE
   ========================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(44, 44, 44, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background-color: #ffffff;
    width: 100%;
    max-width: 650px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: 20px;
    border: 1px solid var(--border);
    padding: 30px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: var(--cream);
    border: 1px solid var(--border);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    color: var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
}

.modal-close:hover {
    background-color: var(--border);
}

/* En-tête : on réserve la place de la croix pour ne pas chevaucher le bouton audio */
.modal-top-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding-right: 52px;
}

.modal-main-info {
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: 0;
}

.modal-char-lg {
    font-size: 55px;
    font-family: var(--font-hanzi);
    font-weight: bold;
    color: var(--ink);
    line-height: 1;
}

.modal-text-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.modal-pinyin-lg {
    font-size: 20px;
    color: var(--terracotta);
    font-weight: bold;
}

.modal-meaning-lg {
    font-size: 18px;
    color: var(--ink);
    margin: 0;
    font-weight: 600;
}

.modal-badge {
    display: inline-block;
    background-color: var(--cream);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 12px;
    color: #666666;
    width: fit-content;
    margin-top: 4px;
}

.modal-audio-btn {
    flex-shrink: 0;
    background-color: var(--blue);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 14px;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(121, 168, 224, 0.3);
    transition: transform 0.2s ease;
}

.modal-audio-btn:hover {
    transform: scale(1.05);
}

.modal-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0;
    width: 100%;
}

.modal-section-title {
    font-size: 15px;
    color: var(--ink);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

/* Écriture interactive */
.modal-interactive-box {
    background-color: var(--cream);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.modal-box-label {
    font-size: 13px;
    color: var(--muted);
}

.modal-drawing-board {
    background-color: #ffffff;
    background-image:
        linear-gradient(to right, transparent calc(50% - 0.5px), var(--border) calc(50% - 0.5px), var(--border) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
        linear-gradient(to bottom, transparent calc(50% - 0.5px), var(--border) calc(50% - 0.5px), var(--border) calc(50% + 0.5px), transparent calc(50% + 0.5px));
    border: 1px dashed var(--border-strong);
    width: 180px;
    height: 180px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-drawing-board svg {
    display: block;
    cursor: crosshair;
    touch-action: none; /* le tracé au doigt ne fait pas défiler la page */
}

.modal-feedback {
    margin: 0;
    min-height: 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--green);
}

.modal-action-buttons {
    display: flex;
    gap: 10px;
    width: 100%;
    justify-content: center;
}

.btn-primary,
.btn-success {
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 10px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.2s;
}

.btn-primary { background-color: var(--blue); }
.btn-success { background-color: var(--green); }

.btn-primary:hover,
.btn-success:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Décomposition trait par trait */
.decomposition-legend {
    margin-left: auto;
    font-size: 12px;
    color: #666666;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot-current { background-color: var(--terracotta); }
.dot-radical { background-color: var(--blue); margin-left: 6px; }

.stroke-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
    gap: 10px;
}

.stroke-step {
    background-color: #ffffff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px 6px 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.stroke-step svg {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
}

.stroke-step span {
    font-size: 11px;
    color: var(--muted);
}

.stroke-ghost   { fill: #EFECE6; }
.stroke-done    { fill: var(--ink); }
.stroke-radical { fill: var(--blue); }
.stroke-current { fill: var(--terracotta); }

.steps-info {
    grid-column: 1 / -1;
    font-size: 13px;
    color: var(--muted);
}

/* ==========================================
   PAGE 404
   ========================================== */
#error400 {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: 20px;
}

#error400 h2 {
    color: var(--ink);
    font-size: 28px;
    font-weight: 600;
    margin: 0 0 25px;
}

#error400 a {
    display: inline-block;
    background-color: var(--terracotta);
    color: #ffffff;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

#error400 a:hover {
    background-color: var(--terracotta-dark);
    transform: translateY(-2px);
}

/* ==========================================
   FOOTER (collé en bas de page)
   ========================================== */
footer {
    background-color: var(--cream);
    color: var(--ink);
    text-align: center;
    padding: 30px 20px;
    font-size: 16px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.dictionary-container {
    padding-bottom: 50px;
}

/* ==========================================
   RESPONSIVE (≤ 768px)
   ========================================== */
@media screen and (max-width: 768px) {
    nav {
        padding: 16px 20px;
    }

    .burger-menu {
        display: flex;
    }

    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;           /* s'adapte à la hauteur réelle de la navbar */
        left: 0;
        width: 100%;
        background-color: var(--cream);
        padding: 20px 0;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        gap: 20px;
        text-align: center;
        z-index: 500;
    }

    nav ul.active {
        display: flex;
    }

    .burger-menu.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
    .burger-menu.active span:nth-child(2) { opacity: 0; }
    .burger-menu.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

    .dictionary-header {
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
    }

    .search-box-wrapper {
        flex: auto;
    }

    .modal-content {
        padding: 22px 18px;
    }

    .modal-char-lg {
        font-size: 44px;
    }

    #error400 h2 {
        font-size: 22px;
    }
}