/* --- Design System & Custom Properties --- */
:root {
    --bg-dark: #06060c;
    --bg-panel: rgba(13, 13, 26, 0.45);
    --border-light: rgba(255, 255, 255, 0.08);
    --border-active: rgba(0, 242, 254, 0.3);
    
    --text-primary: #f0f4f9;
    --text-secondary: #9aa0a6;
    --text-dark: #5f6368;
    
    /* Neon gradients / Accent Colors */
    --accent-glow-cyan: rgba(0, 242, 254, 0.6);
    --accent-glow-magenta: rgba(79, 172, 254, 0.6);
    --neon-blue: #00f2fe;
    --neon-purple: #4facfe;
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;
}

/* --- Base Setup --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-user-select: none;
    user-select: none;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

/* Hide Webcam Video */
#webcam-video {
    display: none;
    position: absolute;
    pointer-events: none;
    width: 0;
    height: 0;
    opacity: 0;
}

/* Fullscreen Canvas */
#webgl-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    touch-action: none;
}

/* --- Glassmorphism UI Layout --- */
#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none; /* Let clicks pass to canvas */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2.5rem;
}

#ui-overlay * {
    pointer-events: auto; /* Re-enable pointer events for UI controls */
}

/* App Header */
.app-header {
    margin-bottom: 2rem;
    align-self: flex-start;
}

.glow-text {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 242, 254, 0.2);
    margin-bottom: 0.25rem;
}

.subtitle {
    font-family: var(--font-body);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Glass Panels */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    transition: border 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

/* Mode Selector Panel */
.mode-selector-panel {
    align-self: flex-start;
    width: 320px;
    margin-top: 1rem;
    margin-bottom: auto; /* Pushes the next elements down */
}

.mode-selector-panel h2 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-primary);
}

.mode-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 0.85rem 1.25rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    text-align: left;
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.mode-btn.active {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(79, 172, 254, 0.15));
    border-color: var(--neon-blue);
    color: var(--neon-blue);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
}

.mode-btn .icon {
    font-size: 1.15rem;
}

/* Status Indicator */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--neon-blue);
}

.status-dot {
    width: 6px;
    height: 6px;
    background-color: var(--neon-blue);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--neon-blue);
}

.pulsing {
    animation: pulse 1.5s infinite alternate;
}

@keyframes pulse {
    0% { opacity: 0.4; transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1.2); box-shadow: 0 0 12px var(--neon-blue); }
}

/* System Stats Panel */
.info-panel {
    align-self: flex-start;
    width: 320px;
    margin-top: 2rem;
}

.info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.info-header h3 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.stat-badge {
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--neon-blue);
    border-radius: 20px;
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    font-family: var(--font-heading);
    color: var(--neon-blue);
    font-weight: 700;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-val {
    color: var(--text-primary);
    font-weight: 500;
}

.divider {
    height: 1px;
    background: var(--border-light);
    margin: 0.85rem 0;
}

.description {
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-secondary);
    margin-bottom: 0.85rem;
}

.controls-hint {
    font-size: 0.75rem;
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.controls-hint strong {
    color: var(--text-secondary);
}

/* --- Webcam Request Modal --- */
.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(4, 4, 8, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s ease;
}

.modal-content {
    width: 90%;
    max-width: 420px;
    text-align: center;
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    animation: scaleUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes scaleUp {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.modal-content h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
}

.modal-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    width: 100%;
}

.action-btn {
    flex: 1;
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
    border: none;
    border-radius: 8px;
    padding: 0.85rem;
    color: white;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

.action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.4);
}

.action-btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    box-shadow: none;
}

.action-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    box-shadow: none;
}

/* lil-gui Custom Styling for integration with dark/glass theme */
.lil-gui {
    --background-color: var(--bg-panel) !important;
    --text-color: var(--text-primary) !important;
    --title-background-color: rgba(255, 255, 255, 0.03) !important;
    --widget-color: rgba(255, 255, 255, 0.08) !important;
    --hover-color: rgba(255, 255, 255, 0.15) !important;
    --focus-color: var(--neon-blue) !important;
    --number-color: var(--neon-blue) !important;
    --string-color: #8ab4f8 !important;
    font-family: var(--font-body) !important;
    font-size: 0.85rem !important;
    border: 1px solid var(--border-light) !important;
    border-radius: 12px !important;
    overflow: hidden !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4) !important;
}

.lil-gui.root {
    position: absolute !important;
    top: 2.5rem !important;
    right: 2.5rem !important;
    z-index: 100 !important;
}

/* Toast Message */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: rgba(26, 13, 13, 0.9);
    border: 1px solid rgba(255, 75, 75, 0.3);
    color: #ff7b7b;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    font-size: 0.9rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    pointer-events: auto;
    animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideIn {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.hidden {
    display: none !important;
    opacity: 0;
    pointer-events: none;
}

/* --- Mobile Styling --- */
@media (max-width: 768px) {
    #ui-overlay {
        padding: 1.5rem;
        flex-direction: column;
        justify-content: flex-start;
        gap: 1rem;
        overflow-y: auto;
        pointer-events: auto; /* Enable scroll */
    }
    
    .glow-text {
        font-size: 1.75rem;
    }
    
    .mode-selector-panel, .info-panel {
        width: 100%;
        margin-top: 0;
        margin-bottom: 0;
    }
    
    .lil-gui.root {
        position: static !important;
        width: 100% !important;
    }
}

/* Toggle UI Button */
#mobile-ui-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 200;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

#mobile-ui-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

@media (max-width: 768px) {
    #mobile-ui-toggle {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 45px;
        height: 45px;
    }
}

/* --- HUD Hide Mode --- */
body.hide-hud #ui-overlay,
body.hide-hud .lil-gui {
    display: none !important;
    opacity: 0 !important;
    pointer-events: none !important;
}