:root {
    /* Palette - Deep Space & Quantum Cyan */
    --bg-color: #010409;
    --sidebar-bg: rgba(5, 10, 15, 0.98);
    --card-bg: rgba(10, 20, 35, 0.85);
    --glass-bg: rgba(15, 23, 42, 0.6);
    
    --accent-cyan: #00f3ff;
    --accent-blue: #0066ff;
    --accent-glow: rgba(0, 243, 255, 0.45);
    
    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --border-color: rgba(0, 243, 255, 0.35);
    --hover-border: rgba(0, 243, 255, 1);

    --sidebar-width: 320px;
    --header-height: 90px;
    
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-accent: 'Orbitron', sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Overrides - High-End Scientific Paper Style */
body.light-theme {
    --bg-color: #f8fafc;
    --sidebar-bg: rgba(255, 255, 255, 0.9);
    --card-bg: rgba(255, 255, 255, 0.7);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: rgba(0, 102, 255, 0.12);
    --hover-border: rgba(0, 102, 255, 0.6);
    --accent-glow: rgba(0, 102, 255, 0.15);
}

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=Orbitron:wght@700;800&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

.glass-morphism {
    background: var(--glass-bg);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--border-color);
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
    transition: background-color 0.8s ease;
    user-select: none; /* Empecher la sélection de texte */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* Quantum Background */
#singularity-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    opacity: 0.85;
    filter: brightness(1.2);
}

/* Sidebar Upgrade */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    background: var(--sidebar-bg);
    backdrop-filter: blur(25px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: var(--transition);
}

.logo-container {
    padding: 40px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid var(--border-color);
}

.logo-circle {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: 1.4rem;
    box-shadow: 0 0 25px var(--accent-glow);
    animation: pulse-l0 3s infinite;
}

@keyframes pulse-l0 {
    0% { transform: scale(1); box-shadow: 0 0 15px var(--accent-glow); }
    50% { transform: scale(1.05); box-shadow: 0 0 35px var(--accent-glow); }
    100% { transform: scale(1); box-shadow: 0 0 15px var(--accent-glow); }
}

.logo-text {
    font-family: var(--font-accent);
    font-size: 1.1rem;
    letter-spacing: 2px;
    line-height: 1.1;
    color: var(--text-primary);
}

.logo-subtext {
    display: block;
    font-size: 0.7rem;
    color: var(--accent-cyan);
    font-family: var(--font-main);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links {
    flex: 1;
    overflow-y: auto;
    padding: 30px 10px;
}

.nav-item {
    margin: 5px 0;
    padding: 14px 20px;
    border-radius: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    border: 1px solid transparent;
}

.nav-item:hover {
    background: rgba(0, 243, 255, 0.05);
    color: var(--text-primary);
    transform: translateX(5px);
}

.nav-item.active {
    background: rgba(0, 243, 255, 0.2);
    color: var(--text-primary);
    border: 1px solid var(--accent-cyan);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.volume-indicator {
    width: 10px;
    height: 10px;
    border-radius: 3px;
    margin-right: 18px;
    flex-shrink: 0;
    box-shadow: 0 0 10px currentColor;
}

.sidebar-footer {
    padding: 30px;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
}

/* Header Refinement */
header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 50px;
    background: rgba(3, 7, 10, 0.4);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    z-index: 50;
}

.search-container {
    width: 100%;
    max-width: 500px;
    position: relative;
}

.search-input {
    width: 100%;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 14px 20px 14px 50px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.95rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 25px var(--accent-glow);
}

.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-cyan);
    font-size: 1rem;
}

/* Premium Buttons */
.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 50px;
    height: 50px;
    border-radius: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: rotate(20deg) scale(1.1);
    border-color: var(--accent-cyan);
}

.btn-analysis {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: white;
    border: none;
    padding: 14px 30px;
    border-radius: 14px;
    font-weight: 800;
    cursor: pointer;
    font-family: var(--font-accent);
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: var(--transition);
    box-shadow: 0 10px 25px rgba(0, 114, 255, 0.4);
}

.btn-analysis:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 114, 255, 0.6);
}

.btn-close {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-accent);
    font-size: 0.8rem;
    letter-spacing: 1px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-close:hover {
    background: rgba(255, 77, 77, 0.1);
    color: #ff4d4d;
    border-color: #ff4d4d;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 77, 77, 0.2);
}

/* Layout & Cards */
.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    z-index: 10;
}

.content-area {
    flex: 1;
    padding: 50px;
    overflow-y: auto;
}

.doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.doc-card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    position: relative;
    transition: var(--transition);
    cursor: pointer;
    overflow: hidden;
}

.doc-card:hover {
    border-color: var(--hover-border);
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.card-tag {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 15px;
    display: block;
}

.doc-card h3 {
    font-size: 1.3rem;
    line-height: 1.4;
    margin-bottom: 20px;
}

/* Modal Viewport */
.viewer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 2, 5, 0.9);
    backdrop-filter: blur(20px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-container {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    overflow: hidden;
    width: 95vw;
    height: 95vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    background: var(--sidebar-bg);
    padding: 25px 40px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0;
    background: #1e1e1e;
    overflow: hidden;
}

.modal-body iframe {
    flex: 1;
    width: 100%;
    height: 100%;
    border: none;
}

/* Simulator Controls */
.sim-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 5px;
    outline: none;
}
.sim-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-cyan);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-cyan);
}
#d0-canvas, #l0-collider-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Force Dark Mode for Simulations even in Light Theme */
#simulator-view, #collider-view {
    --text-primary: #ffffff !important;
    --text-secondary: #cbd5e1 !important;
}

#simulator-view .glass-morphism, #collider-view .glass-morphism {
    background: #02060c !important;
    border: 1px solid rgba(0, 243, 255, 0.4) !important;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.9) !important;
}

#sim-canvas-wrap, #collider-canvas-wrap {
    background: #000 !important;
    background-image: linear-gradient(rgba(0, 243, 255, 0.05) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(0, 243, 255, 0.05) 1px, transparent 1px) !important;
    background-size: 40px 40px !important;
    border: 2px solid rgba(0, 243, 255, 0.5) !important;
    box-shadow: inset 0 0 100px rgba(0, 243, 255, 0.1), 0 0 40px rgba(0,0,0,0.8), 0 0 15px rgba(0, 243, 255, 0.2) !important;
    overflow: hidden;
    animation: monitorPulse 5s infinite alternate;
}

@keyframes monitorPulse {
    from { border-color: rgba(0, 243, 255, 0.3); }
    to { border-color: rgba(0, 243, 255, 0.7); }
}

#sim-canvas-wrap::after, #collider-canvas-wrap::after {
    content: "";
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.2) 50%), 
                linear-gradient(90deg, rgba(255, 0, 0, 0.05), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.05));
    background-size: 100% 4px, 4px 100%;
    pointer-events: none;
    z-index: 5;
    opacity: 0.7;
    animation: scanlineScroll 10s linear infinite;
}

@keyframes scanlineScroll {
    from { background-position: 0 0, 0 0; }
    to { background-position: 0 100%, 0 0; }
}

.hud-data {
    position: absolute;
    bottom: 25px;
    right: 25px;
    font-family: 'Orbitron', monospace;
    font-size: 0.75rem;
    color: var(--accent-cyan);
    background: rgba(0,0,0,0.6);
    padding: 10px 15px;
    border-radius: 8px;
    border-left: 3px solid var(--accent-cyan);
    text-align: left;
    line-height: 1.8;
    pointer-events: none;
    text-shadow: 0 0 15px var(--accent-cyan);
    letter-spacing: 1px;
    z-index: 10;
}

/* Chat-C3 Floating Assistant */
#chat-c3-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

#chat-toggle {
    width: 65px;
    height: 65px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 114, 255, 0.4);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

#chat-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 15px 40px rgba(0, 114, 255, 0.6);
}

#chat-window {
    position: absolute;
    bottom: 85px;
    right: 0;
    width: 380px;
    height: 550px;
    background: var(--sidebar-bg);
    backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    display: none; /* Hidden by default */
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideInUp 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

.chat-header {
    padding: 20px 25px;
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-accent);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.chat-header button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

#chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    padding: 12px 18px;
    border-radius: 18px;
    font-size: 0.9rem;
    max-width: 85%;
    line-height: 1.4;
}

.message.bot {
    background: var(--glass-bg);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    border: 1px solid var(--border-color);
}

.message.user {
    background: var(--accent-blue);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.chat-input-area {
    padding: 20px;
    display: flex;
    gap: 10px;
    border-top: 1px solid var(--border-color);
}

.chat-input-area input {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 10px 15px;
    color: white;
    font-size: 0.9rem;
}

.chat-input-area button {
    background: var(--accent-cyan);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 12px;
    color: #000;
    cursor: pointer;
    transition: var(--transition);
}

.chat-input-area button:hover {
    transform: scale(1.05);
}

/* Animations */
@keyframes slideInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.doc-card {
    animation: slideInUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) backwards;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-cyan); }