:root {
    --bg-gradient: linear-gradient(135deg, #09061a, #161233, #0d0b21);
    --glass-surface: rgba(255, 255, 255, 0.05);
    --glass-surface-hover: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-focus: rgba(0, 242, 234, 0.4);
    
    --primary-color: #00f2ea;
    --primary-glow: rgba(0, 242, 234, 0.35);
    --secondary-color: #ff0055;
    --secondary-glow: rgba(255, 0, 85, 0.35);
    --green-color: #00e676;
    --green-glow: rgba(0, 230, 118, 0.3);
    --yellow-color: #ffd700;
    --yellow-glow: rgba(255, 215, 0, 0.3);
    --purple-color: #b388ff;
    --purple-glow: rgba(179, 136, 255, 0.3);
    
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.6);
    --text-dark: #121214;
    --font-family: 'Inter', sans-serif;
    
    --shadow-premium: 0 12px 40px 0 rgba(0, 0, 0, 0.6);
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-family);
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background glowing circles for ambient depth */
.background-glow {
    position: fixed;
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(0, 242, 234, 0.08) 0%, rgba(0,0,0,0) 70%);
    z-index: -1;
    pointer-events: none;
}

.background-glow::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -20%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(255, 0, 85, 0.06) 0%, rgba(0,0,0,0) 70%);
    pointer-events: none;
}

/* Base Layout Wrapper */
.app-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Premium Navbar Styling */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: var(--glass-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    margin-bottom: 25px;
    box-shadow: var(--shadow-premium);
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-main);
}

.brand-emoji {
    font-size: 1.8rem;
    filter: drop-shadow(0 0 8px var(--primary-color));
}

.brand-text {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, var(--primary-color), var(--purple-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
    background: rgba(0, 242, 234, 0.08);
}

/* User Badges inside Navbar */
.user-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    padding: 6px 14px;
    border-radius: 50px;
}

.streak-fire {
    color: #ff9100;
    font-weight: 700;
    font-size: 0.9rem;
    text-shadow: 0 0 8px rgba(255, 145, 0, 0.4);
}

.points-badge {
    color: #ffd700;
    font-weight: 700;
    font-size: 0.9rem;
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.4);
}

.username-display {
    color: var(--text-main);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Common Buttons */
.btn {
    padding: 10px 22px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
}

.btn-nav {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.btn-nav.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
}

.btn-nav.secondary:hover {
    background: rgba(255, 255, 255, 0.12);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn.primary {
    background: linear-gradient(90deg, var(--primary-color), #00b4d8);
    color: var(--text-dark);
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn.primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px var(--primary-glow);
}

.btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
}

.btn.secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
}

.btn-full {
    width: 100%;
}

/* Glass Card styling */
.glass-card {
    background: var(--glass-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--shadow-premium);
    transition: var(--transition-smooth);
}

/* Flash Messages */
.flash-messages {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 25px;
}

.flash-message {
    padding: 14px 20px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid transparent;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.flash-message.success {
    background: rgba(0, 230, 118, 0.15);
    border-color: rgba(0, 230, 118, 0.3);
    color: #a7ffeb;
}

.flash-message.error {
    background: rgba(255, 0, 85, 0.15);
    border-color: rgba(255, 0, 85, 0.3);
    color: #ff8a80;
}

.flash-message.warning {
    background: rgba(255, 215, 0, 0.15);
    border-color: rgba(255, 215, 0, 0.3);
    color: #ffe57f;
}

.flash-close {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.3rem;
    cursor: pointer;
    line-height: 1;
}

/* Authentication Pages CSS */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 0;
    flex: 1;
}

.auth-card {
    width: 100%;
    max-width: 450px;
    padding: 40px;
}

.auth-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
    text-align: center;
    background: linear-gradient(90deg, var(--primary-color), var(--purple-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 30px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    color: var(--text-muted);
    pointer-events: none;
}

.input-wrapper input {
    width: 100%;
    padding: 12px 14px 12px 42px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.input-wrapper input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 10px rgba(0, 242, 234, 0.2);
    background: rgba(0, 0, 0, 0.4);
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 5px;
    opacity: 0.6;
    transition: var(--transition-smooth);
}

.toggle-password:hover {
    opacity: 1;
}

.password-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.forgot-password-link {
    font-size: 0.85rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.forgot-password-link:hover {
    text-decoration: underline;
    color: var(--purple-color);
}

.auth-footer {
    margin-top: 25px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Dashboard Layout Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 24px;
}

.full-width {
    grid-column: span 2;
}

/* Profile Card */
.profile-card {
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 25px;
}

.profile-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--purple-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 0 15px rgba(0, 242, 234, 0.3);
}

.profile-info h3 {
    font-size: 1.3rem;
    font-weight: 700;
}

.user-level {
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-top: 2px;
}

.level-progress-container {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 10px;
}

.level-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--purple-color));
    border-radius: 3px;
}

.level-progress-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    margin-top: 4px;
}

.profile-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    background: rgba(0, 0, 0, 0.2);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.p-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.p-stat-val {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
}

.p-stat-lbl {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 3px;
}

/* Stats Cards Grid */
.stats-overview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.stat-card {
    padding: 22px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    font-size: 2.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-data {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.6rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Neon glow helper classes */
.glow-cyan { border-left: 4px solid var(--primary-color); }
.glow-cyan:hover { box-shadow: 0 0 15px var(--primary-glow); }
.glow-green { border-left: 4px solid var(--green-color); }
.glow-green:hover { box-shadow: 0 0 15px var(--green-glow); }
.glow-pink { border-left: 4px solid var(--secondary-color); }
.glow-pink:hover { box-shadow: 0 0 15px var(--secondary-glow); }
.glow-purple { border-left: 4px solid var(--purple-color); }
.glow-purple:hover { box-shadow: 0 0 15px var(--purple-glow); }

/* Chart Card & Layout */
.chart-card {
    padding: 24px;
}

.card-header {
    margin-bottom: 20px;
}

.card-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
}

.card-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: block;
    margin-top: 3px;
}

.chart-wrapper {
    position: relative;
    width: 100%;
    height: 350px;
}

/* Achievements Section */
.achievements-card {
    padding: 24px;
}

.achievements-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: 430px;
    overflow-y: auto;
    padding-right: 5px;
}

.achievements-list::-webkit-scrollbar {
    width: 6px;
}

.achievements-list::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 3px;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
}

.achievement-item.unlocked {
    border-color: rgba(179, 136, 255, 0.2);
}

.achievement-item.locked {
    opacity: 0.45;
    filter: grayscale(1);
}

.ach-badge {
    font-size: 2.2rem;
    min-width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 8px rgba(0,0,0,0.2);
}

.achievement-item.unlocked .ach-badge {
    background: linear-gradient(135deg, rgba(179, 136, 255, 0.2), rgba(0, 242, 234, 0.1));
}

.ach-details h4 {
    font-size: 1rem;
    font-weight: 700;
}

.ach-details p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.ach-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 6px;
    font-size: 0.75rem;
}

.ach-reward {
    color: #ffd700;
    font-weight: 600;
}

.ach-date {
    color: var(--purple-color);
    font-weight: 500;
}

.ach-status {
    color: var(--text-muted);
}

/* Recent Sessions Log */
.sessions-list-card {
    padding: 24px;
}

.table-wrapper {
    overflow-x: auto;
    width: 100%;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

.data-table th, .data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

.data-table th {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    font-size: 0.9rem;
    color: var(--text-main);
}

.data-table tbody tr {
    transition: var(--transition-smooth);
}

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.mono {
    font-family: 'JetBrains Mono', monospace;
}

/* Status Badges */
.badge {
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 700;
    display: inline-block;
    text-transform: uppercase;
}

.badge-green {
    background: rgba(0, 230, 118, 0.15);
    color: var(--green-color);
    border: 1px solid rgba(0, 230, 118, 0.3);
}

.badge-yellow {
    background: rgba(255, 215, 0, 0.15);
    color: var(--yellow-color);
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.badge-red {
    background: rgba(255, 0, 85, 0.15);
    color: var(--secondary-color);
    border: 1px solid rgba(255, 0, 85, 0.3);
}

.btn-table {
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.btn-table.primary {
    background: rgba(0, 242, 234, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(0, 242, 234, 0.2);
}

.btn-table.primary:hover {
    background: rgba(0, 242, 234, 0.2);
    box-shadow: 0 0 10px var(--primary-glow);
}

.table-actions {
    display: flex;
    gap: 8px;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* Monitoring View Styles */
.monitor-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.monitor-main {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 24px;
}

.camera-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.camera-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.camera-title-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pulse-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.pulse-dot.red {
    background: var(--secondary-color);
    box-shadow: 0 0 10px var(--secondary-glow);
    animation: alert-pulse 1s infinite alternate;
}

@keyframes alert-pulse {
    from { opacity: 0.3; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1.1); }
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 0, 0, 0.3);
    padding: 6px 14px;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    font-size: 0.85rem;
    font-weight: 600;
}

.light {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #555;
    transition: var(--transition-smooth);
}

.light.green { background-color: var(--primary-color); box-shadow: 0 0 10px var(--primary-color); }
.light.yellow { background-color: var(--yellow-color); box-shadow: 0 0 10px var(--yellow-color); }
.light.red { background-color: var(--secondary-color); box-shadow: 0 0 12px var(--secondary-color); }

/* Video Grid and canvas */
.video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background-color: #050508;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.input-video {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: translate(-50%, -50%) scaleX(-1);
    opacity: 0;
    pointer-events: none;
}

.output-canvas {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: translate(-50%, -50%) scaleX(-1);
}

/* Drowsiness alert overlay */
.overlay-message {
    position: absolute;
    inset: 0;
    background: rgba(255, 0, 85, 0.82);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
    color: #fff;
    animation: flashAlert 0.4s infinite alternate;
}

.overlay-message.hidden {
    display: none;
}

.warning-icon {
    font-size: 4rem;
    margin-bottom: 8px;
    filter: drop-shadow(0 0 12px #fff);
}

.overlay-message h2 {
    font-size: 2.8rem;
    font-weight: 900;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.overlay-message p {
    font-size: 1.3rem;
    font-weight: 500;
    margin-top: 4px;
    text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

@keyframes flashAlert {
    from { opacity: 0.85; }
    to { opacity: 1; }
}

/* Controls row */
.monitor-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
}

.settings {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(0, 0, 0, 0.3);
    padding: 8px 18px;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
}

.settings label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

input[type="range"] {
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.15);
    height: 4px;
    border-radius: 2px;
    width: 100px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px var(--primary-color);
    transition: var(--transition-smooth);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Sidebar HUD */
.hud-card, .session-summary-card {
    padding: 20px;
}

.monitor-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hud-card h3, .session-summary-card h3 {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.hud-divider {
    height: 1px;
    background: var(--glass-border);
    margin: 12px 0;
}

.hud-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.hud-item.highlighted {
    background: rgba(0, 242, 234, 0.05);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid rgba(0, 242, 234, 0.15);
    margin: 8px 0;
}

.hud-lbl {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.hud-val {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color);
}

.hud-item.highlighted .hud-lbl { color: var(--text-main); font-weight: 600; }
.hud-item.highlighted .hud-val { color: var(--primary-color); font-size: 1.1rem; }

/* Drowsiness Meter widget */
.meter-wrapper {
    margin-top: 15px;
}

.meter-lbl-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.meter-track {
    width: 100%;
    height: 10px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.meter-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #00b4d8);
    transition: width 0.25s, background 0.3s;
    box-shadow: 0 0 8px rgba(0, 242, 234, 0.4);
}

/* Logging Stats Grid */
.log-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.log-cell {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    padding: 12px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
}

.log-lbl {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.log-val {
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 3px;
}

/* Challenge Modal & Tasks */
.challenge-modal {
    position: fixed;
    inset: 0;
    background: rgba(2, 1, 10, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.challenge-modal.hidden {
    display: none;
}

.challenge-content {
    width: 100%;
    max-width: 460px;
    padding: 35px;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 30px rgba(0, 242, 234, 0.25);
    text-align: center;
    background: linear-gradient(135deg, #100e2b, #1d1840);
    animation: challenge-enter 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes challenge-enter {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.challenge-header {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 1px;
    text-shadow: 0 0 10px var(--primary-glow);
    margin-bottom: 6px;
}

.challenge-instruction {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.challenge-area {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* Challenge-Specific Element styling */
.math-expression {
    font-size: 2.2rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

.math-input {
    width: 150px;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.4);
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
}

.math-input:focus {
    border-color: var(--primary-color);
    outline: none;
}

/* Memory block styles */
.memory-sequence-display {
    font-size: 2rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
    color: var(--primary-color);
    letter-spacing: 5px;
    animation: memory-pulse 0.8s infinite alternate;
}

@keyframes memory-pulse {
    from { opacity: 0.7; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1.05); }
}

.memory-numpad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: 100%;
    max-width: 200px;
    margin-top: 15px;
}

.btn-num {
    padding: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-num:hover {
    background: rgba(255,255,255,0.12);
}

/* Reaction test layout */
.reaction-container {
    width: 100%;
    height: 150px;
    position: relative;
    overflow: hidden;
}

.reaction-target {
    position: absolute;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary-color) 0%, #00b4d8 100%);
    border: none;
    cursor: pointer;
    box-shadow: 0 0 15px var(--primary-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #000;
    transition: top 0.15s, left 0.15s;
}

/* Physical / Pose progress visualizer */
.pose-challenge-status {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.pose-progress-track {
    width: 80%;
    height: 8px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 4px;
    overflow: hidden;
}

.pose-progress-fill {
    height: 100%;
    background: var(--green-color);
    box-shadow: 0 0 8px var(--green-glow);
    width: 0%;
    transition: width 0.1s linear;
}

/* Challenge Feedback Alert */
.challenge-feedback {
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: 15px;
}

.challenge-feedback.error {
    background: rgba(255, 0, 85, 0.15);
    border: 1px solid rgba(255, 0, 85, 0.3);
    color: #ff8a80;
}

.challenge-feedback.success {
    background: rgba(0, 230, 118, 0.15);
    border: 1px solid rgba(0, 230, 118, 0.3);
    color: #a7ffeb;
}

/* Session Details CSS */
.session-detail-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.detail-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 10px;
}

.detail-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: block;
    margin-top: 3px;
}

.export-actions {
    display: flex;
    gap: 15px;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.metric-card {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.m-icon {
    font-size: 2rem;
}

.m-data {
    display: flex;
    flex-direction: column;
}

.m-val {
    font-size: 1.3rem;
    font-weight: 700;
}

.m-lbl {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Footer Styling */
footer {
    margin-top: auto;
    padding: 30px 0 10px;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.25);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive CSS adjustment */
@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .full-width {
        grid-column: span 1;
    }
    .stats-overview-grid {
        grid-template-columns: 1fr;
    }
    .monitor-main {
        grid-template-columns: 1fr;
    }
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .detail-header-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    .monitor-controls {
        flex-direction: column;
        align-items: stretch;
    }
    .settings {
        margin-left: 0;
        justify-content: space-between;
    }
}

/* AI Productivity Insights Styles */
.insights-card {
    padding: 24px;
}
.insights-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 15px;
}
.insights-metrics-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}
.insight-metric {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    padding: 15px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.im-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}
.im-value {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary-color);
    font-family: 'JetBrains Mono', monospace;
    text-shadow: 0 0 10px var(--primary-glow);
}
.insights-bullets h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--purple-color);
}
.insights-bullets ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.insights-bullets li {
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--text-main);
}
.insights-empty {
    padding: 10px 0;
}
.insights-empty-banner {
    background: rgba(179, 136, 255, 0.1);
    border: 1px dashed var(--purple-color);
    color: var(--purple-color);
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 15px;
}
.insights-empty-tips {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.insights-empty-tips li {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.4;
}

@media (max-width: 768px) {
    .insights-metrics-row {
        grid-template-columns: 1fr;
    }
}