/* ==========================================================
   HỆ THỐNG QUẢN LÝ KÝ TÚC XÁ RA VÀO - MODERN DARK/LIGHT UI
   ========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-main: #0b0f19;
    --bg-card: #131b2e;
    --bg-card-hover: #1c2742;
    --bg-sidebar: #0f1629;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(79, 70, 229, 0.4);
    
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: rgba(79, 70, 229, 0.15);
    
    --success: #10b981;
    --success-light: rgba(16, 185, 129, 0.15);
    --warning: #f59e0b;
    --warning-light: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-light: rgba(239, 68, 68, 0.15);
    --info: #06b6d4;
    --info-light: rgba(6, 182, 212, 0.15);

    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --shadow-card: 0 10px 30px -5px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 25px rgba(79, 70, 229, 0.35);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--text-dim);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Sidebar Layout */
.app-sidebar {
    width: 270px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

.sidebar-brand {
    padding: 24px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-brand .logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), #818cf8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.sidebar-brand .brand-title {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-brand .brand-badge {
    font-size: 10px;
    background: var(--primary-light);
    color: #818cf8;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 700;
    margin-top: 2px;
}

.sidebar-nav {
    padding: 20px 14px;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-section-title {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-dim);
    font-weight: 700;
    letter-spacing: 0.8px;
    padding: 10px 12px 6px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link i {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-link:hover {
    color: var(--text-main);
    background-color: var(--bg-card);
    transform: translateX(4px);
}

.nav-link.active {
    color: #fff;
    background: linear-gradient(90deg, var(--primary), #6366f1);
    box-shadow: 0 4px 20px -2px rgba(79, 70, 229, 0.5);
    font-weight: 600;
}

.sidebar-user {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0,0,0,0.2);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--primary-light);
    color: #818cf8;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.user-meta .name {
    font-size: 13px;
    font-weight: 600;
}

.user-meta .role {
    font-size: 11px;
    color: var(--text-dim);
}

/* Main Content Area */
.app-main {
    margin-left: 270px;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-topbar {
    height: 70px;
    background: rgba(15, 22, 41, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
}

.topbar-title {
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.live-pulse {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--success);
    font-weight: 700;
    background: var(--success-light);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.content-body {
    padding: 30px;
    flex: 1;
}

/* Stats Metric Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 22px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-card);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.stat-card.primary::before { background: var(--primary); }
.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before { background: var(--danger); }

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 600;
}

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.stat-card.primary .stat-icon { background: var(--primary-light); color: #818cf8; }
.stat-card.success .stat-icon { background: var(--success-light); color: var(--success); }
.stat-card.warning .stat-icon { background: var(--warning-light); color: var(--warning); }
.stat-card.danger .stat-icon { background: var(--danger-light); color: var(--danger); }

.stat-value {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -1px;
}

.stat-sub {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: 4px;
}

/* Custom Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: #dc2626;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.btn-outline:hover {
    background: var(--bg-card-hover);
    border-color: var(--text-dim);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

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

.custom-table th {
    background: rgba(0, 0, 0, 0.2);
    padding: 14px 18px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

.custom-table td {
    padding: 14px 18px;
    font-size: 13px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    vertical-align: middle;
}

.custom-table tr:hover td {
    background: var(--bg-card-hover);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 700;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger  { background: var(--danger-light); color: var(--danger); }
.badge-info    { background: var(--info-light); color: var(--info); }
.badge-primary { background: var(--primary-light); color: #818cf8; }

/* Forms */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 14px;
    color: #fff;
    outline: none;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

/* Live Monitor Face Comparison Card */
.live-compare-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color);
    margin-bottom: 20px;
}

.face-avatar-box {
    text-align: center;
}

.face-avatar-box img {
    width: 110px;
    height: 130px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.face-avatar-box .label {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 6px;
    font-weight: 600;
}

/* Responsive */
@media (max-width: 992px) {
    .app-sidebar {
        transform: translateX(-100%);
    }
    .app-sidebar.mobile-open {
        transform: translateX(0);
    }
    .app-main {
        margin-left: 0;
    }
}