:root {
    /* Thème Sombre (Défaut) */
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --accent-color: #3b82f6;
    --hover-bg: rgba(59, 130, 246, 0.15);
    --terminal-bg: #000000;
    --terminal-text: #00ff00;
}

[data-theme="light"] {
    --bg-color: #f1f5f9;
    --text-color: #0f172a;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --hover-bg: rgba(59, 130, 246, 0.1);
    --terminal-bg: #1e293b;
    --terminal-text: #4ade80;
}



* {
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* NAVBAR */
.navbar {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-content {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 15px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-left {
    display: flex;
    align-items: center;
}

.nav-center {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
    justify-content: flex-end;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    white-space: nowrap;
}

.nav-right a, #theme-toggle {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 1100px) {
    .nav-content {
        grid-template-columns: 1fr auto;
        grid-template-rows: auto auto;
    }
    .nav-center {
        grid-column: 1 / -1;
        order: 3;
        margin-top: 5px;
    }
}

/* CONTENEUR PRINCIPAL */
.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

/* TABLEAU DE BORD */
.table-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow-x: auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

table { width: 100%; border-collapse: collapse; }
th, td { padding: 16px 20px; border-bottom: 1px solid var(--border-color); text-align: left; }
th { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; opacity: 0.8; }
tr:last-child td { border-bottom: none; }
tr.clickable-row { cursor: pointer; }
tr.clickable-row:hover { background: var(--hover-bg); transform: translateY(-1px); }

.badge {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    padding: 6px 12px;
    border-radius: 8px;
    font-weight: 700;
}

/* NAVIGATION INTERNE SUJET */
.action-btn {
    justify-content: center;
    box-sizing: border-box;
    padding: 8px 15px !important;
    font-size: 0.85rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    white-space: nowrap;
    display: flex;
    align-items: center;
}

.action-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.15);
}
.nav-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 15px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
}
.nav-btn:hover {
    background: var(--hover-bg);
}
.home-btn {
    margin: 0 auto;
}

/* PAGE SUJET */
.subject-header {
    margin-bottom: 30px;
}

.subject-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.tags { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; }
.tag { background: var(--card-bg); border: 1px solid var(--border-color); padding: 5px 12px; border-radius: 20px; font-size: 0.9rem; }

.btn {
    background: var(--accent-color);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    border: none;
    cursor: pointer;
    margin-right: 10px;
}
.btn:hover { opacity: 0.9; }

/* DEUX COLONNES (PDF / EXPLICATIONS) */
.split-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: start;
    margin-top: 30px;
}

.pdf-panel {
    position: sticky;
    top: 100px; /* Offset for navbar */
    height: 80vh;
    min-height: 600px;
    background: #e5e7eb;
    border-radius: 12px;
    overflow: hidden;
}

.pdf-panel iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.content-panel {
    min-width: 0;
}

/* HIDDEN PDF MODE */
.split-view.pdf-hidden {
    grid-template-columns: 1fr;
}
.split-view.pdf-hidden .pdf-panel {
    display: none;
}

/* QUESTIONS */
.question-block {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
}

.question-block h2 {
    margin-top: 0;
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

/* CODE BLOCKS */
.code-container {
    position: relative;
    margin-top: 20px;
}
.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.8rem;
}
.copy-btn:hover { background: rgba(255,255,255,0.4); }

pre, code {
    font-family: 'Fira Code', monospace;
    font-variant-ligatures: none; /* Désactiver les ligatures pour que == et != soient bien lisibles sans fusionner */
}

pre code {
    font-size: 0.95rem;
    border-radius: 8px;
    padding: 20px !important;
    background-color: #1e1e1e !important;
    color: #e5e5e5;
    overflow-x: auto;
    border: 1px solid rgba(255,255,255,0.1);
}

/* Style for inline code */
p code, li code, td code, .alert code {
    background: var(--surface-light);
    color: var(--accent-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* TERMINAL */
.terminal {
    background: var(--terminal-bg);
    color: var(--terminal-text);
    font-family: 'Fira Code', monospace;
    padding: 20px;
    border-radius: 8px;
    border: 2px solid #333;
    overflow-x: auto;
    margin-top: 15px;
    white-space: pre-wrap;
}
.terminal-header {
    color: #888;
    margin-bottom: 10px;
    font-size: 0.85rem;
    border-bottom: 1px dashed #333;
    padding-bottom: 5px;
}

/* SPOILER (MASQUER SOLUTION) */
.spoiler-content {
    display: none;
    margin-top: 15px;
}
.spoiler-content.visible {
    display: block;
}
.btn-toggle-sol {
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    margin-top: 10px;
}
.btn-toggle-sol:hover {
    background: var(--accent-color);
    color: white;
}

/* MOBILE RESPONSIVE */
@media (max-width: 900px) {
    .split-view { 
        grid-template-columns: 1fr; 
    }
    .pdf-panel { 
        position: static;
        height: 50vh; 
        margin-bottom: 20px; 
    }
}

/* GITHUB ALERTS (NOTE, WARNING, etc.) */
.alert {
    padding: 15px 20px;
    margin: 25px 0;
    border-left: 5px solid;
    border-radius: 8px;
    background-color: var(--card-bg);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.alert p:first-child { margin-top: 0; }
.alert p:last-child { margin-bottom: 0; }

.alert-warning {
    border-color: #ef4444; /* Rouge/Danger */
    background-color: rgba(239, 68, 68, 0.1);
}
.alert-warning p:first-child::before {
    content: "🛑 DANGER : ";
    font-weight: 800;
    color: #ef4444;
    display: block;
    margin-bottom: 5px;
    font-size: 1.1em;
}

.alert-note {
    border-color: #3b82f6; /* Bleu */
    background-color: rgba(59, 130, 246, 0.1);
}
.alert-note p:first-child::before {
    content: "ℹ️ NOTE : ";
    font-weight: 700;
    color: #3b82f6;
    display: inline-block;
    margin-bottom: 5px;
}

.alert-important {
    border-color: #8b5cf6; /* Violet */
    background-color: rgba(139, 92, 246, 0.1);
}
.alert-important p:first-child::before {
    content: "⚠️ IMPORTANT : ";
    font-weight: 700;
    color: #8b5cf6;
    display: inline-block;
    margin-bottom: 5px;
}

/* ==========================================================================
   IMPRESSION (Print Styles)
   ========================================================================== */
@media print {
    /* Masquer les éléments inutiles pour l'impression de la correction */
    .navbar, 
    .pdf-panel, 
    .btn, 
    .btn-toggle-sol, 
    .copy-btn,
    #print-modal {
        display: none !important;
    }

    /* Ajuster la vue principale */
    .split-view {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        overflow: visible !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    .content-panel {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        height: auto !important;
        overflow: visible !important;
        padding: 0 !important;
        background: none !important;
        color: #000 !important; /* Texte en noir pour l'encre */
    }

    /* Afficher tout le contenu masqué (spoilers de code) */
    .spoiler-content {
        display: block !important;
        opacity: 1 !important;
        max-height: none !important;
        border: none !important;
    }

    /* Mises en page spécifiques */
    @page {
        margin: 1cm;
    }

    body, html {
        background: #fff !important;
        color: #000 !important;
        font-size: 12pt;
        width: 100% !important;
        max-width: 100% !important;
    }
    
    .container {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    pre, code, .terminal {
        background-color: #f8f9fa !important;
        border: 1px solid #ccc !important;
        color: #000 !important;
        page-break-inside: avoid; /* Éviter de couper le code au milieu */
        white-space: pre-wrap !important; /* Forcer le retour à la ligne du code */
        word-wrap: break-word !important;
        overflow-x: visible !important;
    }
    
    .question-block {
        /* page-break-inside retiré pour éviter les sauts de page vides géants */
        border: none !important;
        background: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin-bottom: 20px !important;
        width: 100% !important;
    }

    .full-code-section {
        display: none !important;
    }

    /* Ne pas imprimer les liens URL après le texte */
    a[href]::after {
        content: none !important;
    }
}