:root {
    --bg-dark: #0f111a;
    --bg-gradient: linear-gradient(135deg, #0f111a 0%, #151a30 50%, #0a0c14 100%);
    --card-bg: rgba(255, 255, 255, 0.04);
    --card-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(12px);
    
    --primary: #3b82f6;
    --primary-glow: rgba(59, 130, 246, 0.4);
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.4);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.4);
    --warning: #f59e0b;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dark: #1f2937;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', 'Sarabun', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-main);
    background: var(--bg-gradient);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Glassmorphism utility card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Text utility */
.text-truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==========================================================================
   CLIENT PLAYER STYLES (index.html)
   ========================================================================== */

.client-body {
    background: #000; /* True black background for seamless video borders */
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Fullscreen YouTube Player Container */
#player-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
}

#yt-player {
    width: 100%;
    height: 100%;
    border: none;
    pointer-events: none; /* Block user tapping on the player to play/pause */
}

/* Splash Overlay for Gesture Authorization */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(10, 12, 22, 0.95);
    z-index: 999;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: opacity 0.5s ease;
}

.overlay .glass-card {
    max-width: 480px;
    width: 100%;
    padding: 40px 30px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.system-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(90deg, #60a5fa, #3b82f6, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.system-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 30px;
    letter-spacing: 0.5px;
}

/* Input group */
.input-group {
    margin-bottom: 25px;
    text-align: left;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 16px;
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background: rgba(255, 255, 255, 0.08);
}

/* Pulsing Button */
.btn-pulse {
    width: 100%;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--primary-glow);
    transition: var(--transition);
    animation: pulse 2s infinite;
}

.btn-pulse:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

.btn-pulse:active {
    transform: translateY(1px);
}

.overlay-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 15px;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
    }
    70% {
        box-shadow: 0 0 0 12px rgba(59, 130, 246, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
    }
}

/* Tiny connection status dot */
.status-dot {
    position: absolute;
    bottom: 12px;
    right: 12px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    z-index: 99;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);
    transition: var(--transition);
}

.status-dot.online {
    background-color: var(--success);
    box-shadow: 0 0 10px var(--success-glow);
}

.status-dot.offline {
    background-color: var(--danger);
    box-shadow: 0 0 10px var(--danger-glow);
}

/* Modal styling */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-content {
    max-width: 400px;
    width: 100%;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.modal-content h3 {
    margin-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 8px;
}

.modal-content p {
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.modal-content strong {
    color: #fff;
}

.modal-content button {
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 10px;
    margin-top: 15px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.modal-content button:hover {
    background: rgba(255, 255, 255, 0.2);
}


/* ==========================================================================
   ADMIN PORTAL STYLES (control.html)
   ========================================================================== */

.admin-body {
    padding: 30px;
    background: var(--bg-gradient);
}

/* Login box override */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-card {
    max-width: 400px;
    width: 100%;
    padding: 35px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.login-card h2 {
    font-size: 1.8rem;
    letter-spacing: 2px;
    margin-bottom: 8px;
    font-weight: 700;
}

.login-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 25px;
}

#pin-input {
    text-align: center;
    font-size: 1.8rem;
    letter-spacing: 8px;
    padding: 10px;
    border-radius: 8px;
}

.btn {
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    padding: 12px 24px;
    width: 100%;
}

.btn-primary:hover {
    background-color: #2563eb;
    box-shadow: 0 0 15px var(--primary-glow);
}

.alert {
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.alert-danger {
    background-color: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--danger);
    color: #fca5a5;
}

/* Dashboard container */
.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Header */
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
}

.admin-header .brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.admin-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.badge {
    background-color: var(--success);
    font-size: 0.7rem;
    font-weight: bold;
    padding: 3px 8px;
    border-radius: 20px;
    color: #fff;
    box-shadow: 0 0 8px var(--success-glow);
}

.btn-logout {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 6px;
    transition: var(--transition);
}

.btn-logout:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: #fff;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 25px;
}

.stat-icon {
    font-size: 2.2rem;
    background: rgba(255, 255, 255, 0.05);
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.stat-content {
    flex: 1;
    overflow: hidden;
}

.stat-content h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
}

.stat-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Dashboard Body layout */
.dashboard-body {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 20px;
}

@media (max-width: 900px) {
    .dashboard-body {
        grid-template-columns: 1fr;
    }
}

/* Main controls panel */
.main-controls {
    padding: 25px;
    display: flex;
    flex-direction: column;
}

.controls-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.controls-header h2 {
    font-size: 1.25rem;
}

.btn-danger {
    background-color: var(--danger);
    color: #fff;
    padding: 12px 24px;
    box-shadow: 0 4px 12px var(--danger-glow);
}

.btn-danger:hover {
    background-color: #dc2626;
    box-shadow: 0 6px 18px rgba(239, 68, 68, 0.6);
    transform: translateY(-1px);
}

.btn-large {
    font-size: 1rem;
}

/* Playlist item grids */
.playlist-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.playlist-item {
    padding: 16px 20px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
    overflow: hidden;
}

.playlist-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background-color: transparent;
    transition: var(--transition);
}

.playlist-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(4px);
}

.playlist-item.active {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.playlist-item.active::before {
    background-color: var(--primary);
}

.playlist-item.active .item-number {
    color: var(--primary);
    font-weight: 700;
}

.item-number {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.item-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #fff;
}

.item-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.loop-tag {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid var(--warning);
    color: #fbbf24;
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: bold;
}

/* Tablet status monitor */
.client-monitor {
    padding: 25px;
    display: flex;
    flex-direction: column;
}

.client-monitor h2 {
    font-size: 1.25rem;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 15px;
}

.table-wrapper {
    overflow-x: auto;
    flex: 1;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
}

th {
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

tbody tr {
    transition: var(--transition);
}

tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge.online {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

/* Fade-in animation class */
.fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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