/* ================================================
   ANKI-SHARE — Style principal
   Palette : Soft Dark Blue + accents Indigo/Emerald/Amber
   ================================================ */

:root {
    --bg-app:        #080e1a;
    --bg-card:       #0f1624;
    --bg-card-hover: #121d2e;
    --bg-footer:     #0a1120;
    --surface:       #111827;

    --border:        #1a2640;
    --border-hover:  #2a3f5f;

    --text-primary:   #f0f4fc;
    --text-secondary: #64748b;
    --text-muted:     #334155;

    --accent-indigo:  #6366f1;
    --accent-indigo-bg: rgba(99, 102, 241, 0.12);
    --accent-indigo-border: rgba(99, 102, 241, 0.25);
    --accent-indigo-text: #a5b4fc;

    --accent-emerald: #10b981;
    --accent-emerald-bg: rgba(16, 185, 129, 0.12);
    --accent-emerald-border: rgba(16, 185, 129, 0.25);
    --accent-emerald-text: #6ee7b7;

    --accent-violet:  #8b5cf6;
    --accent-violet-bg: rgba(139, 92, 246, 0.12);
    --accent-violet-border: rgba(139, 92, 246, 0.25);
    --accent-violet-text: #c4b5fd;

    --accent-blue:    #3b82f6;
    --accent-blue-bg: rgba(59, 130, 246, 0.12);
    --accent-blue-border: rgba(59, 130, 246, 0.25);
    --accent-blue-text: #93c5fd;

    --accent-amber-bg: rgba(245, 158, 11, 0.12);
    --accent-amber-border: rgba(245, 158, 11, 0.25);
    --accent-amber-text: #fcd34d;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-app);
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ================================================
   HERO
   ================================================ */
.hero {
    background-color: var(--bg-app);
    border-bottom: 1px solid var(--border);
    padding: 2rem 0 4rem;
    position: relative;
    overflow: hidden;
}

/* Glow décoratif */
.hero::before {
    content: '';
    position: absolute;
    top: -100px; right: -80px;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, transparent 65%);
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -60px; left: 25%;
    width: 260px; height: 260px;
    background: radial-gradient(circle, rgba(16,185,129,0.06) 0%, transparent 65%);
    pointer-events: none;
}

.hero-content { position: relative; z-index: 1; }

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -1.5px;
    color: white;
    margin: 1.5rem 0 0.75rem;
    line-height: 1.1;
}

.hero h1 .accent { color: var(--accent-indigo-text); }

.hero p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0;
    line-height: 1.65;
}

/* Badge filière */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-indigo-bg);
    border: 1px solid var(--accent-indigo-border);
    color: var(--accent-indigo-text);
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}

/* Stats rapides dans le hero */
.hero-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.hero-stat strong {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.hero-stat span {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 3px;
}

/* Nav retour */
nav { margin-bottom: 3rem; }

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}
.back-link:hover { color: var(--text-primary); }

/* ================================================
   MAIN CONTENT
   ================================================ */
main.container { padding-top: 3rem; padding-bottom: 4rem; }

/* ================================================
   SECTIONS PAR MATIÈRE
   ================================================ */
.subject-section { margin-bottom: 3.5rem; }

.section-header {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0 0 2rem 3.375rem;
}

/* Icône matière */
.icon-wrapper {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
}

.math-icon {
    background: var(--accent-violet-bg);
    color: var(--accent-violet-text);
    border: 1px solid var(--accent-violet-border);
}

.physics-icon {
    background: var(--accent-blue-bg);
    color: var(--accent-blue-text);
    border: 1px solid var(--accent-blue-border);
}

.info-icon {
    background: var(--accent-emerald-bg);
    color: var(--accent-emerald-text);
    border: 1px solid var(--accent-emerald-border);
}

/* Pour index.html (icône "À propos") */
.about-icon {
    background: var(--accent-indigo-bg);
    color: var(--accent-indigo-text);
    border: 1px solid var(--accent-indigo-border);
}

.subject-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

/* ================================================
   SOUS-SECTIONS
   ================================================ */
.sub-section { margin-bottom: 2.25rem; }

.sub-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.sub-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ================================================
   GRILLE DE CARTES
   ================================================ */
.decks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 0.875rem;
}

/* ================================================
   CARTE
   ================================================ */
.deck-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: border-color 0.2s, transform 0.2s, background 0.2s;
}

.deck-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

/* Contenu principal de la carte */
.card-content {
    padding: 1rem;
    flex-grow: 1;
}

/* Badge de type (Anki / PDF) */
.card-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 2px 8px;
    border-radius: 5px;
    margin-bottom: 0.625rem;
}

.badge-anki {
    background: var(--accent-blue-bg);
    color: var(--accent-blue-text);
    border: 1px solid var(--accent-blue-border);
}

.badge-pdf {
    background: var(--accent-amber-bg);
    color: var(--accent-amber-text);
    border: 1px solid var(--accent-amber-border);
}

.deck-card h4 {
    margin: 0 0 0.375rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.deck-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* Tags */
.tags {
    display: flex;
    gap: 0.3rem;
    flex-wrap: wrap;
    margin-top: 0.625rem;
}

.tag {
    font-size: 0.68rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    background: var(--bg-app);
    border: 1px solid var(--border);
    color: var(--text-muted);
}

/* Pied de carte (méta + bouton) */
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 1rem;
    border-top: 1px solid var(--border);
    background: var(--bg-footer);
    transition: border-color 0.2s;
}

.deck-card:hover .card-footer {
    border-top-color: var(--border-hover);
}

.card-count {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
}

/* Flèche / CTA de la carte */
.card-arrow {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s, gap 0.2s;
}

.deck-card:hover .card-arrow {
    color: var(--accent-indigo-text);
    gap: 7px;
}

/* Bouton "Ouvrir l'espace X" (index.html) */
.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.7rem 1rem;
    font-weight: 600;
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.deck-card:hover .download-btn {
    background: var(--accent-indigo);
    border-top-color: var(--accent-indigo);
    color: white;
}

/* ================================================
   SÉPARATEUR
   ================================================ */
.divider {
    border: 0;
    height: 1px;
    background: var(--border);
    margin: 3rem 0;
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 600px) {
    .container { padding: 0 1.25rem; }
    .hero { padding: 1.5rem 0 3rem; }
    .hero h1 { font-size: 2rem; letter-spacing: -1px; }
    .hero-stats { gap: 1.25rem; }
    .decks-grid { grid-template-columns: 1fr; }
    .section-desc { margin-left: 0; margin-top: 0.5rem; }
}