@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,600;0,700;1,500&display=swap');

:root {
    /* Premium Light Theme Colors */
    --bg-main: #f1f5f9; /* Soft Slate 100 */
    --bg-card: rgba(255, 255, 255, 0.85); /* Semi-transparent pure white */
    --border-color: rgba(15, 23, 42, 0.08); /* Clean dark borders */
    --border-glow: rgba(37, 99, 235, 0.1);
    
    --text-primary: #0f172a; /* Slate 900 */
    --text-secondary: #334155; /* Slate 700 */
    --text-muted: #64748b; /* Slate 500 */
    
    --primary: #1d4ed8; /* Royal Blue */
    --primary-glow: rgba(37, 99, 235, 0.15);
    --accent: #059669; /* Emerald 600 */
    --warning: #d97706; /* Amber 600 */
    --danger: #dc2626; /* Red 600 */

    /* Theme Tracks Colors - Highly visible on light background */
    --color-monde: #e11d48; /* Red/Rose - Monde & Conflits */
    --color-monde-bg: rgba(225, 29, 72, 0.04);
    --color-monde-border: rgba(225, 29, 72, 0.18);
    
    --color-acteurs: #0891b2; /* Cyan/Teal - Totalitarismes */
    --color-acteurs-bg: rgba(8, 145, 178, 0.04);
    --color-acteurs-border: rgba(8, 145, 178, 0.18);

    --color-decol: #d97706; /* Amber/Orange - Décolonisation */
    --color-decol-bg: rgba(217, 119, 6, 0.04);
    --color-decol-border: rgba(217, 119, 6, 0.18);

    --color-europe: #2563eb; /* Blue - Europe */
    --color-europe-bg: rgba(37, 99, 235, 0.04);
    --color-europe-border: rgba(37, 99, 235, 0.18);
    
    --color-france: #7c3aed; /* Violet/Purple - La France */
    --color-france-bg: rgba(124, 58, 237, 0.04);
    --color-france-border: rgba(124, 58, 237, 0.18);

    --font-sans: 'Outfit', 'Inter', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, #f8fafc 0%, #f1f5f9 90%),
        radial-gradient(circle at 80% 80%, rgba(37, 99, 235, 0.04) 0%, transparent 50%),
        radial-gradient(circle at 20% 80%, rgba(124, 58, 237, 0.04) 0%, transparent 50%);
    background-attachment: fixed;
    min-height: 100vh;
}

/* Background image faint overlay */
.historical-watermark {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=1920&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.015;
    z-index: -1;
    pointer-events: none;
}

/* Container */
.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

/* Header */
header {
    margin-bottom: 2rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2rem;
}

.logo-container h1 {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #1e3a8a 30%, #2563eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

.subtitle strong {
    color: var(--primary);
    font-weight: 600;
}

/* Navigation & Controls */
.controls-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    background: var(--bg-card);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}

.tabs {
    display: flex;
    gap: 0.5rem;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(15, 23, 42, 0.04);
}

.tab-btn.active {
    color: #ffffff;
    background: var(--primary);
    box-shadow: 0 4px 15px var(--primary-glow);
}

.search-container {
    position: relative;
    max-width: 300px;
    width: 100%;
}

.search-input {
    width: 100%;
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.15);
}

.search-icon {
    position: absolute;
    left: 0.8rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* Zooms bar */
.zooms-bar {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.zoom-btn {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition-fast);
    white-space: nowrap;
    box-shadow: 0 2px 5px rgba(15, 23, 42, 0.02);
}

.zoom-btn:hover {
    background: #f8fafc;
    color: var(--text-primary);
}

.zoom-btn.active {
    background: rgba(37, 99, 235, 0.08);
    border-color: var(--primary);
    color: var(--primary);
}

/* TIMELINE VIEW (Horizontal scroll grid) */
.timeline-outer-wrapper {
    display: grid;
    grid-template-columns: auto 1fr;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
    position: relative;
}

/* Sidebar tracks */
.timeline-tracks-sidebar {
    width: 220px;
    border-right: 1px solid var(--border-color);
    display: grid;
    grid-template-rows: 50px 1fr 1fr 1fr 1fr 1fr 50px;
    background: #ffffff;
    z-index: 10;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.02);
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.02);
}

.track-sidebar-item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.track-sidebar-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10%;
    height: 80%;
    width: 4px;
    border-radius: 0 4px 4px 0;
}

.track-sidebar-item.monde::before { background-color: var(--color-monde); }
.track-sidebar-item.acteurs::before { background-color: var(--color-acteurs); }
.track-sidebar-item.decol::before { background-color: var(--color-decol); }
.track-sidebar-item.europe::before { background-color: var(--color-europe); }
.track-sidebar-item.france::before { background-color: var(--color-france); }

.track-sidebar-item h3 {
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.track-sidebar-item.monde h3 { color: #be123c; }
.track-sidebar-item.acteurs h3 { color: #0e7490; }
.track-sidebar-item.decol h3 { color: #b45309; }
.track-sidebar-item.europe h3 { color: #1d4ed8; }
.track-sidebar-item.france h3 { color: #6d28d9; }

.track-sidebar-item span {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.25;
}

/* Timeline grid scroll container */
.timeline-scroll-container {
    overflow-x: auto;
    overflow-y: hidden;
    position: relative;
    scrollbar-width: auto;
    scrollbar-color: rgba(37, 99, 235, 0.3) rgba(15, 23, 42, 0.03);
    cursor: grab;
}

.timeline-scroll-container.active-dragging {
    cursor: grabbing;
    user-select: none;
}

.timeline-scroll-container::-webkit-scrollbar {
    height: 10px;
}
.timeline-scroll-container::-webkit-scrollbar-track {
    background: rgba(15, 23, 42, 0.02);
    border-radius: 0 0 var(--radius) 0;
}
.timeline-scroll-container::-webkit-scrollbar-thumb {
    background-color: rgba(37, 99, 235, 0.25);
    border-radius: 6px;
    border: 2px solid #ffffff;
}
.timeline-scroll-container::-webkit-scrollbar-thumb:hover {
    background-color: var(--primary);
}

/* Timeline Grid */
.timeline-grid {
    display: grid;
    grid-template-rows: 50px 1fr 1fr 1fr 1fr 1fr 50px;
    position: relative;
    min-height: 580px;
}

/* Time axis year markers */
.time-axis {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.02);
}
.time-axis.bottom {
    border-bottom: none;
    border-top: 1px solid var(--border-color);
}

.year-marker {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-right: 1px solid rgba(15, 23, 42, 0.04);
    flex-shrink: 0;
    position: relative;
}

.year-marker::after {
    content: '';
    position: absolute;
    right: 0;
    height: 10px;
    width: 1px;
    background-color: var(--border-color);
}
.time-axis.top .year-marker::after { bottom: 0; }
.time-axis.bottom .year-marker::after { top: 0; }

.year-marker.decade {
    color: var(--text-primary);
    font-size: 1rem;
    background: rgba(15, 23, 42, 0.015);
}

/* Track rows */
.track-row {
    position: relative;
    border-bottom: 1px solid var(--border-color);
    min-height: 180px;
    overflow: visible;
}
.track-row:last-of-type {
    border-bottom: none;
}

/* Background periods */
.bg-period-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.bg-period-block {
    position: absolute;
    border-radius: 8px;
    border-top: 3px solid transparent;
    padding: 0.4rem 0.6rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    transition: var(--transition-normal);
    opacity: 0.95;
    pointer-events: none; /* Let drag-scroll pass through the background block */
}

.bg-period-block.lane-full {
    height: 100%;
    top: 0;
}

.bg-period-block.lane-top {
    height: 48%;
    top: 0;
}

.bg-period-block.lane-bottom {
    height: 48%;
    top: 52%;
}

.bg-period-header {
    pointer-events: auto; /* Re-enable pointer events for the banner header */
    cursor: pointer;
    display: inline-block;
    padding: 0.2rem 0.4rem;
    border-radius: 6px;
    transition: var(--transition-fast);
    max-width: 100%;
    margin-bottom: 0.1rem;
}

.bg-period-header:hover {
    background: rgba(15, 23, 42, 0.05);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
}

.bg-period-header h4 {
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.05rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-header-icon {
    width: 12px;
    height: 12px;
    color: var(--primary);
    opacity: 0.85;
    flex-shrink: 0;
}

.bg-period-header span {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-muted);
    display: block;
}

/* Colors for light-theme background blocks */
.bg-ww1 {
    background: linear-gradient(180deg, rgba(225, 29, 72, 0.07) 0%, rgba(225, 29, 72, 0.01) 100%);
    border-top-color: var(--color-monde);
}
.bg-ww2 {
    background: linear-gradient(180deg, rgba(220, 38, 38, 0.08) 0%, rgba(220, 38, 38, 0.01) 100%);
    border-top-color: #b91c1c;
}
.bg-coldwar {
    background: linear-gradient(180deg, rgba(37, 99, 235, 0.06) 0%, rgba(37, 99, 235, 0.01) 100%);
    border-top-color: var(--primary);
}
.bg-post1989 {
    background: linear-gradient(180deg, rgba(5, 150, 105, 0.06) 0%, rgba(5, 150, 105, 0.01) 100%);
    border-top-color: var(--accent);
}

.bg-lenin {
    background: linear-gradient(180deg, rgba(244, 63, 94, 0.06) 0%, rgba(244, 63, 94, 0.01) 100%);
    border-top-color: #f43f5e;
}
.bg-stalin {
    background: linear-gradient(180deg, rgba(225, 29, 72, 0.07) 0%, rgba(225, 29, 72, 0.01) 100%);
    border-top-color: #e11d48;
}
.bg-weimar {
    background: linear-gradient(180deg, rgba(217, 119, 6, 0.06) 0%, rgba(217, 119, 6, 0.01) 100%);
    border-top-color: var(--warning);
}
.bg-nazi {
    background: linear-gradient(180deg, rgba(220, 38, 38, 0.08) 0%, rgba(220, 38, 38, 0.01) 100%);
    border-top-color: #b91c1c;
}
.bg-decol {
    background: linear-gradient(180deg, rgba(8, 145, 178, 0.06) 0%, rgba(8, 145, 178, 0.01) 100%);
    border-top-color: var(--color-acteurs);
}
.bg-europe-block {
    background: linear-gradient(180deg, rgba(14, 116, 144, 0.06) 0%, rgba(14, 116, 144, 0.01) 100%);
    border-top-color: #0e7490;
}

.bg-iii-rep {
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.06) 0%, rgba(168, 85, 247, 0.01) 100%);
    border-top-color: var(--color-france);
}
.bg-vichy-block {
    background: linear-gradient(180deg, rgba(71, 85, 105, 0.08) 0%, rgba(71, 85, 105, 0.01) 100%);
    border-top-color: #475569;
}
.bg-iv-rep {
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.06) 0%, rgba(139, 92, 246, 0.01) 100%);
    border-top-color: #8b5cf6;
}
.bg-v-rep {
    background: linear-gradient(180deg, rgba(79, 70, 229, 0.07) 0%, rgba(79, 70, 229, 0.01) 100%);
    border-top-color: #4f46e5;
}
.bg-trente-glorieuses {
    background: linear-gradient(180deg, rgba(16, 185, 129, 0.07) 0%, rgba(16, 185, 129, 0.01) 100%);
    border-top-color: #10b981;
}

/* Event grid cells (Background gridlines layer) */
.grid-cells-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    z-index: 2;
    pointer-events: none;
}

.grid-cell {
    height: 100%;
    border-right: 1px solid rgba(15, 23, 42, 0.02);
    flex-shrink: 0;
}

.grid-cell.active-year {
    background: rgba(15, 23, 42, 0.008);
}

/* Events Layer (Content layer above gridlines) */
.events-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

/* Event nodes (Punctual points) */
.event-node {
    position: absolute;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0.3rem 0.7rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.05);
    transition: all var(--transition-fast);
    z-index: 15;
    pointer-events: auto;
    height: 30px;
    white-space: nowrap;
}

.event-node:hover {
    transform: translateY(-2px) scale(1.03);
    background: #f8fafc;
    border-color: var(--primary);
    box-shadow: 0 6px 15px rgba(15, 23, 42, 0.08);
    z-index: 30;
}

/* Specific border glow colors per track */
.track-row.monde .event-node { border-left: 3px solid var(--color-monde); }
.track-row.acteurs .event-node { border-left: 3px solid var(--color-acteurs); }
.track-row.decol .event-node { border-left: 3px solid var(--color-decol); }
.track-row.europe .event-node { border-left: 3px solid var(--color-europe); }
.track-row.france .event-node { border-left: 3px solid var(--color-france); }

.track-row.monde .event-node:hover { box-shadow: 0 0 10px rgba(225, 29, 72, 0.25), 0 4px 10px rgba(0,0,0,0.05); border-color: var(--color-monde); }
.track-row.acteurs .event-node:hover { box-shadow: 0 0 10px rgba(8, 145, 178, 0.25), 0 4px 10px rgba(0,0,0,0.05); border-color: var(--color-acteurs); }
.track-row.decol .event-node:hover { box-shadow: 0 0 10px rgba(217, 119, 6, 0.25), 0 4px 10px rgba(0,0,0,0.05); border-color: var(--color-decol); }
.track-row.europe .event-node:hover { box-shadow: 0 0 10px rgba(37, 99, 235, 0.25), 0 4px 10px rgba(0,0,0,0.05); border-color: var(--color-europe); }
.track-row.france .event-node:hover { box-shadow: 0 0 10px rgba(124, 58, 237, 0.25), 0 4px 10px rgba(0,0,0,0.05); border-color: var(--color-france); }

.event-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.track-row.monde .event-dot { background-color: var(--color-monde); }
.track-row.acteurs .event-dot { background-color: var(--color-acteurs); }
.track-row.decol .event-dot { background-color: var(--color-decol); }
.track-row.europe .event-dot { background-color: var(--color-europe); }
.track-row.france .event-dot { background-color: var(--color-france); }

.event-title {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Duration bars (Horizontal spans) */
.duration-bar {
    position: absolute;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0 10px;
    border: 1px solid transparent;
    cursor: pointer;
    pointer-events: auto;
    transition: all var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    z-index: 12;
}

.duration-bar:hover {
    transform: translateY(-2px);
    filter: brightness(0.95);
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.08);
    z-index: 30;
}

.track-row.monde .duration-bar {
    background: linear-gradient(90deg, rgba(225, 29, 72, 0.15) 0%, rgba(225, 29, 72, 0.05) 100%);
    border-color: rgba(225, 29, 72, 0.25);
    color: #be123c;
}
.track-row.acteurs .duration-bar {
    background: linear-gradient(90deg, rgba(8, 145, 178, 0.15) 0%, rgba(8, 145, 178, 0.05) 100%);
    border-color: rgba(8, 145, 178, 0.25);
    color: #0e7490;
}
.track-row.decol .duration-bar {
    background: linear-gradient(90deg, rgba(217, 119, 6, 0.15) 0%, rgba(217, 119, 6, 0.05) 100%);
    border-color: rgba(217, 119, 6, 0.25);
    color: #b45309;
}
.track-row.europe .duration-bar {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.15) 0%, rgba(37, 99, 235, 0.05) 100%);
    border-color: rgba(37, 99, 235, 0.25);
    color: #1d4ed8;
}
.track-row.france .duration-bar {
    background: linear-gradient(90deg, rgba(124, 58, 237, 0.15) 0%, rgba(124, 58, 237, 0.05) 100%);
    border-color: rgba(124, 58, 237, 0.25);
    color: #6d28d9;
}

/* Timeline Historical Figures Portrait Avatars */
.timeline-figure-avatar {
    position: absolute;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-size: cover;
    background-position: center top;
    cursor: pointer;
    pointer-events: auto;
    box-shadow: 0 3px 8px rgba(15, 23, 42, 0.12);
    transition: all var(--transition-fast);
    z-index: 20;
}

.track-row.monde .timeline-figure-avatar { border: 2.5px solid var(--color-monde); box-shadow: 0 0 8px rgba(225, 29, 72, 0.25), 0 3px 8px rgba(15,23,42,0.12); }
.track-row.acteurs .timeline-figure-avatar { border: 2.5px solid var(--color-acteurs); box-shadow: 0 0 8px rgba(8, 145, 178, 0.25), 0 3px 8px rgba(15,23,42,0.12); }
.track-row.decol .timeline-figure-avatar { border: 2.5px solid var(--color-decol); box-shadow: 0 0 8px rgba(217, 119, 6, 0.25), 0 3px 8px rgba(15,23,42,0.12); }
.track-row.europe .timeline-figure-avatar { border: 2.5px solid var(--color-europe); box-shadow: 0 0 8px rgba(37, 99, 235, 0.25), 0 3px 8px rgba(15,23,42,0.12); }
.track-row.france .timeline-figure-avatar { border: 2.5px solid var(--color-france); box-shadow: 0 0 8px rgba(124, 58, 237, 0.25), 0 3px 8px rgba(15,23,42,0.12); }

.timeline-figure-avatar:hover {
    transform: translateY(-4px) scale(1.3);
    z-index: 40;
    border-color: #ffffff;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.2), 0 0 10px rgba(37, 99, 235, 0.4);
}

.avatar-tooltip {
    position: absolute;
    bottom: -32px;
    left: 50%;
    transform: translateX(-50%);
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.68rem;
    font-weight: 700;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-fast);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    z-index: 50;
}

.timeline-figure-avatar:hover .avatar-tooltip {
    opacity: 1;
}

/* Event lines/bars for ranges */
.event-range-line {
    position: absolute;
    height: 4px;
    border-radius: 2px;
    z-index: 3;
    opacity: 0.8;
}
.track-row.monde .event-range-line { background-color: var(--color-monde); }
.track-row.acteurs .event-range-line { background-color: var(--color-acteurs); }
.track-row.decol .event-range-line { background-color: var(--color-decol); }
.track-row.europe .event-range-line { background-color: var(--color-europe); }
.track-row.france .event-range-line { background-color: var(--color-france); }

/* Legend info */
.timeline-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 1.5rem;
    background: var(--bg-card);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(15, 23, 42, 0.02);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 4px;
}

/* DETAILS MODAL */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    z-index: 100;
    transition: opacity var(--transition-normal);
    backdrop-filter: blur(6px);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    max-width: 650px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 2rem;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-normal);
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.1), 0 0 20px rgba(37, 99, 235, 0.03);
}

.modal-overlay.open .modal-content {
    transform: scale(1) translateY(0);
}

.close-btn {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.close-btn:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

.modal-header {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    margin-bottom: 1.5rem;
}
.modal-portrait-wrapper {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary);
    flex-shrink: 0;
    box-shadow: 0 0 10px rgba(37, 99, 235, 0.2);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}
.modal-portrait-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}
.modal-header-text {
    flex-grow: 1;
}

@media (max-width: 640px) {
    .modal-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    .modal-portrait-wrapper {
        width: 80px;
        height: 80px;
    }
}

.modal-tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.modal-tag.monde { background: rgba(225, 29, 72, 0.1); color: #be123c; border: 1px solid rgba(225, 29, 72, 0.2); }
.modal-tag.acteurs { background: rgba(8, 145, 178, 0.1); color: #0e7490; border: 1px solid rgba(8, 145, 178, 0.2); }
.modal-tag.decol { background: rgba(217, 119, 6, 0.1); color: #b45309; border: 1px solid rgba(217, 119, 6, 0.2); }
.modal-tag.europe { background: rgba(37, 99, 235, 0.1); color: #1d4ed8; border: 1px solid rgba(37, 99, 235, 0.2); }
.modal-tag.france { background: rgba(124, 58, 237, 0.1); color: #6d28d9; border: 1px solid rgba(124, 58, 237, 0.2); }

.modal-date {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.modal-title {
    font-family: var(--font-sans);
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.modal-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.modal-desc p {
    margin-bottom: 1rem;
}

.modal-desc ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
    list-style-type: disc;
}

.modal-desc li {
    margin-bottom: 0.4rem;
}

.course-section-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 1.2rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 0.2rem;
}

/* Brevet Tip box */
.brevet-tip-box {
    background: rgba(217, 119, 6, 0.05);
    border-left: 4px solid var(--warning);
    border-radius: 0 8px 8px 0;
    padding: 1.2rem;
    margin-top: 0.5rem;
}

.brevet-tip-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--warning);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.brevet-tip-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.5;
}

.brevet-tip-text ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
    list-style-type: square;
}

.brevet-tip-text li {
    margin-bottom: 0.3rem;
}

.modal-figures-section h5 {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.modal-figures-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.modal-figure-badge {
    background: rgba(15, 23, 42, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}
.modal-figure-badge:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 2px 8px var(--primary-glow);
}

/* HISTORICAL FIGURES VIEW */
.figures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.figure-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    box-shadow: 0 4px 15px rgba(15, 23, 42, 0.03);
}

.figure-card:hover {
    transform: translateY(-5px);
    border-color: rgba(37, 99, 235, 0.25);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.06), 0 0 15px rgba(37, 99, 235, 0.03);
}

.figure-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.figure-card.monde { border-left: 3px solid var(--color-monde); }
.figure-card.acteurs { border-left: 3px solid var(--color-acteurs); }
.figure-card.decol { border-left: 3px solid var(--color-decol); }
.figure-card.europe { border-left: 3px solid var(--color-europe); }
.figure-card.france { border-left: 3px solid var(--color-france); }

.figure-card.monde .figure-avatar { border-color: var(--color-monde); }
.figure-card.acteurs .figure-avatar { border-color: var(--color-acteurs); }
.figure-card.decol .figure-avatar { border-color: var(--color-decol); }
.figure-card.europe .figure-avatar { border-color: var(--color-europe); }
.figure-card.france .figure-avatar { border-color: var(--color-france); }

.figure-avatar {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    background-size: cover;
    background-position: center top;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--primary);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.figure-meta h3 {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
}

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

.figure-title {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.figure-role {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
    flex-grow: 1;
}

.figure-importance {
    background: rgba(15, 23, 42, 0.01);
    border-top: 1px solid var(--border-color);
    padding-top: 0.8rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* QUIZ VIEW */
.quiz-container {
    max-width: 700px;
    margin: 0 auto;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: 0 8px 25px rgba(15, 23, 42, 0.04);
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.quiz-progress {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.quiz-score-indicator {
    background: rgba(5, 150, 105, 0.08);
    color: var(--accent);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.quiz-progress-bar-bg {
    width: 100%;
    height: 6px;
    background: rgba(15, 23, 42, 0.03);
    border-radius: 3px;
    margin-bottom: 2rem;
    overflow: hidden;
}

.quiz-progress-bar-fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width var(--transition-normal);
}

.quiz-question-box {
    margin-bottom: 2rem;
}

.quiz-question {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.quiz-option {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    padding: 1rem 1.2rem;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all var(--transition-fast);
}

.quiz-option:hover {
    background: #f1f5f9;
    border-color: rgba(15, 23, 42, 0.15);
}

.quiz-option.selected {
    background: rgba(37, 99, 235, 0.05);
    border-color: var(--primary);
}

.quiz-radio {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition-fast);
}

.quiz-option.selected .quiz-radio {
    border-color: var(--primary);
}

.quiz-option.selected .quiz-radio::after {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--primary);
}

/* Feedback states */
.quiz-option.correct {
    background: rgba(5, 150, 105, 0.08);
    border-color: var(--accent);
    color: #047857;
}
.quiz-option.correct .quiz-radio {
    border-color: var(--accent);
}
.quiz-option.correct .quiz-radio::after {
    background-color: var(--accent);
}

.quiz-option.incorrect {
    background: rgba(220, 38, 38, 0.08);
    border-color: var(--danger);
    color: #b91c1c;
}
.quiz-option.incorrect .quiz-radio {
    border-color: var(--danger);
}
.quiz-option.incorrect .quiz-radio::after {
    background-color: var(--danger);
}

.quiz-explanation-box {
    margin-top: 1.5rem;
    padding: 1.2rem;
    border-radius: 8px;
    background: #f8fafc;
    border: 1px solid var(--border-color);
    animation: fadeIn var(--transition-normal);
}

.quiz-explanation-box h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}
.quiz-explanation-box.correct h4 { color: var(--accent); }
.quiz-explanation-box.incorrect h4 { color: var(--danger); }

.quiz-explanation-box p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.quiz-actions {
    margin-top: 2rem;
    display: flex;
    justify-content: flex-end;
}

.quiz-btn {
    background: var(--primary);
    border: none;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-sans);
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 4px 10px var(--primary-glow);
}

.quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--primary-glow);
}

.quiz-btn:disabled {
    background: var(--text-muted);
    color: #ffffff;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Results view */
.quiz-results {
    text-align: center;
    padding: 1.5rem 0;
}

.quiz-results-score-circle {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    border: 5px solid var(--primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.quiz-results-score {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.quiz-results-total {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

.quiz-results h2 {
    font-size: 1.7rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.quiz-results p {
    color: var(--text-secondary);
    max-width: 450px;
    margin: 0 auto 2rem;
}

/* Hidden views */
.view-panel {
    display: none;
}

.view-panel.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* MOBILE RESPONSIVE TIMELINE */
@media (max-width: 1024px) {
    .container {
        padding: 1rem;
    }
    
    .logo-container h1 {
        font-size: 2rem;
    }
    
    .controls-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-container {
        max-width: 100%;
    }
    
    .timeline-outer-wrapper {
        grid-template-columns: 1fr;
        border: none;
        background: transparent;
        box-shadow: none;
        backdrop-filter: none;
    }
    
    .timeline-tracks-sidebar {
        display: none;
    }
    
    .timeline-scroll-container {
        overflow-x: visible;
        overflow-y: visible;
    }
    
    .timeline-grid {
        display: flex;
        flex-direction: column;
        gap: 2rem;
        min-height: auto;
    }
    
    .time-axis {
        display: none;
    }
    
    .track-row {
        flex-direction: column;
        border: 1px solid var(--border-color);
        background: #ffffff;
        border-radius: var(--radius);
        padding: 1.5rem;
        min-height: auto;
        backdrop-filter: blur(10px);
        margin-bottom: 1rem;
    }
    
    .track-row::before {
        content: '';
        display: block;
        font-weight: 800;
        font-size: 1.1rem;
        margin-bottom: 1rem;
        border-bottom: 2px solid var(--border-color);
        padding-bottom: 0.5rem;
    }
    .track-row.monde::before { content: '🌍 Monde & Conflits'; color: #be123c; }
    .track-row.acteurs::before { content: '👥 Totalitarismes'; color: #0e7490; }
    .track-row.decol::before { content: '🌍 Décolonisation'; color: #b45309; }
    .track-row.europe::before { content: '🇪🇺 Construction européenne'; color: #1d4ed8; }
    .track-row.france::before { content: '🇫🇷 France (Politique & Société)'; color: #6d28d9; }

    .bg-period-container {
        display: none;
    }
    
    .grid-cells-container {
        position: static;
        flex-direction: column;
        width: 100%;
        gap: 0.8rem;
    }
    
    .grid-cell {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid rgba(15, 23, 42, 0.03);
        padding: 0 0 0.8rem 0;
        align-items: stretch;
        justify-content: flex-start;
        height: auto;
    }
    .grid-cell:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    
    .grid-cell::before {
        content: attr(data-year);
        font-weight: 700;
        font-size: 0.95rem;
        color: var(--primary);
        margin-bottom: 0.3rem;
        display: block;
    }
    
    .event-node {
        width: 100%;
        max-width: 100%;
        padding: 0.6rem 1rem;
    }
    
    .event-title {
        font-size: 0.85rem;
        white-space: normal;
    }
}

/* Mobile Timeline Feed styles */
.mobile-timeline-container {
    width: 100%;
}
.mobile-timeline {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem 0;
    width: 100%;
}
.mobile-timeline-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    border-left: 4px solid var(--primary);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.02);
}
.mobile-timeline-card:hover {
    transform: translateY(-2px);
    border-color: rgba(15, 23, 42, 0.15);
}
.mobile-timeline-card.monde { border-left-color: var(--color-monde); }
.mobile-timeline-card.acteurs { border-left-color: var(--color-acteurs); }
.mobile-timeline-card.decol { border-left-color: var(--color-decol); }
.mobile-timeline-card.europe { border-left-color: var(--color-europe); }
.mobile-timeline-card.france { border-left-color: var(--color-france); }

.mobile-timeline-card .card-date {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 0.25rem;
}
.mobile-timeline-card.monde .card-date { color: #be123c; }
.mobile-timeline-card.acteurs .card-date { color: #0e7490; }
.mobile-timeline-card.decol .card-date { color: #b45309; }
.mobile-timeline-card.europe .card-date { color: #1d4ed8; }
.mobile-timeline-card.france .card-date { color: #6d28d9; }

.mobile-timeline-card .card-title {
    font-size: 1rem;
    font-weight: 750;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}
.mobile-timeline-card .card-track-tag {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* Mobile Figure Card */
.mobile-figure-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1rem 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    border-left: 4px solid var(--primary);
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.02);
}
.mobile-figure-card:hover {
    transform: translateY(-2px);
    border-color: rgba(15, 23, 42, 0.15);
}
.mobile-figure-card.monde { border-left-color: var(--color-monde); }
.mobile-figure-card.acteurs { border-left-color: var(--color-acteurs); }
.mobile-figure-card.decol { border-left-color: var(--color-decol); }
.mobile-figure-card.europe { border-left-color: var(--color-europe); }
.mobile-figure-card.france { border-left-color: var(--color-france); }

.mobile-figure-card img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
}
.mobile-figure-card.monde img { border-color: var(--color-monde); }
.mobile-figure-card.acteurs img { border-color: var(--color-acteurs); }
.mobile-figure-card.decol img { border-color: var(--color-decol); }
.mobile-figure-card.europe img { border-color: var(--color-europe); }
.mobile-figure-card.france img { border-color: var(--color-france); }

.mobile-figure-info {
    display: flex;
    flex-direction: column;
}
.mobile-figure-info .fig-name {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
}
.mobile-figure-info .fig-title {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.2;
    margin-top: 0.1rem;
}
.mobile-figure-info .fig-type-tag {
    font-size: 0.65rem;
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 700;
    margin-top: 0.3rem;
    letter-spacing: 0.5px;
}
.mobile-figure-card.monde .fig-type-tag { color: #be123c; }
.mobile-figure-card.acteurs .fig-type-tag { color: #0e7490; }
.mobile-figure-card.decol .fig-type-tag { color: #b45309; }
.mobile-figure-card.europe .fig-type-tag { color: #1d4ed8; }
.mobile-figure-card.france .fig-type-tag { color: #6d28d9; }

@media (max-width: 1024px) {
    .timeline-outer-wrapper {
        display: none !important;
    }
    .mobile-timeline-container {
        display: block !important;
    }
}