/* People Management System - Modern Professional Design */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    /* TBS Logo-Inspired Color Palette */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    
    /* TBS Accent Colors */
    --tbs-blue: #2563eb;
    --tbs-dark-blue: #1e40af;
    --tbs-light-blue: #3b82f6;
    --tbs-navy: #1e3a8a;
    
    /* Neutral Grays */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Semantic Colors - Muted Professional */
    --success-50: #f0f9f4;
    --success-100: #dcfce7;
    --success-500: #22c55e;
    --success-600: #16a34a;
    --success-700: #15803d;
    
    --warning-50: #fefce8;
    --warning-100: #fef3c7;
    --warning-500: #eab308;
    --warning-600: #ca8a04;
    --warning-700: #a16207;
    
    --danger-50: #fef2f2;
    --danger-100: #fee2e2;
    --danger-500: #dc2626;
    --danger-600: #b91c1c;
    --danger-700: #991b1b;
    
    --info-50: #f0f9ff;
    --info-100: #e0f2fe;
    --info-500: #0ea5e9;
    --info-600: #0284c7;
    --info-700: #0369a1;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --bg-dark: var(--gray-900);
    
    /* Text Colors */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-muted: var(--gray-500);
    --text-light: var(--gray-400);
    
    /* Border & Shadow */
    --border-color: var(--gray-200);
    --border-light: var(--gray-100);
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 6px 16px -6px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Spacing & Sizing */
    --radius-xs: 0.25rem;
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    margin: 0;
    padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

h1 { font-size: 2.25rem; font-weight: 700; }
h2 { font-size: 1.875rem; font-weight: 600; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Login Page - Clean Professional */
.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-form-container {
    max-width: 400px;
    width: 100%;
}

.login-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    position: relative;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-600), var(--primary-700));
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Navigation - Modern Clean */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 0;
    z-index: 9999 !important;
    position: relative;
    min-height: 100px;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-600) !important;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}

.navbar-brand i {
    font-size: 1.5rem;
}

/* Logo Styles */
.logo {
    height: 70px;
    width: auto;
    object-fit: contain;
    transition: all var(--transition-fast);
}

.logo-large {
    height: 100px;
    width: auto;
    object-fit: contain;
}

.navbar-brand .logo {
    margin-right: 1rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.navbar-brand:hover .logo {
    transform: scale(1.08);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.15));
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--text-secondary) !important;
    transition: all var(--transition-fast);
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius);
    margin: 0 0.25rem;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-600) !important;
    background-color: var(--primary-50);
}

.navbar .dropdown-menu {
    z-index: 10000 !important;
}

.navbar .dropdown {
    z-index: 10000 !important;
}

/* Sidebar - Modern Floating Design */
.sidebar {
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    min-height: calc(100vh - 76px);
    padding: 1.5rem 0;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.sidebar-header {
    padding: 0 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 1.5rem;
}

.sidebar-header h5 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-600);
    margin-bottom: 0.25rem;
}

.sidebar-header small {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.sidebar .nav-link {
    padding: 0.875rem 1.5rem;
    color: var(--text-secondary);
    border-radius: 0;
    transition: all var(--transition-fast);
    border: none;
    margin: 0.125rem 0.75rem;
    border-radius: var(--radius-md);
    position: relative;
    font-weight: 500;
}

.sidebar .nav-link:hover {
    background-color: var(--gray-50);
    color: var(--primary-600);
    transform: translateX(4px);
}

.sidebar .nav-link.active {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.sidebar .nav-link i {
    width: 20px;
    margin-right: 0.875rem;
    font-size: 1rem;
}

/* Cards - Modern Elevated Design */
.card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-base);
    background: var(--bg-primary);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
    padding: 1.25rem 1.5rem;
    position: relative;
}

.card-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1.5rem;
    right: 1.5rem;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
    border-radius: 1px;
}

.card-body {
    padding: 1.5rem;
}

/* Buttons - Modern with Micro-interactions */
.btn {
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    border: none;
    position: relative;
    overflow: hidden;
    font-size: 0.875rem;
    padding: 0.625rem 1.25rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-base);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--primary-600);
    border-color: var(--primary-600);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-700);
    border-color: var(--primary-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    color: white;
}

.btn-success {
    background: var(--success-600);
    border-color: var(--success-600);
    color: white;
}

.btn-success:hover {
    background: var(--success-700);
    border-color: var(--success-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    color: white;
}

.btn-warning {
    background: var(--warning-600);
    border-color: var(--warning-600);
    color: white;
}

.btn-warning:hover {
    background: var(--warning-700);
    border-color: var(--warning-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    color: white;
}

.btn-danger {
    background: var(--danger-600);
    border-color: var(--danger-600);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-700);
    border-color: var(--danger-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    color: white;
}

.btn-outline-primary {
    color: var(--primary-600);
    border: 2px solid var(--primary-200);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-600);
    border-color: var(--primary-600);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-secondary {
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    background: transparent;
}

.btn-outline-secondary:hover {
    background: var(--gray-600);
    border-color: var(--gray-600);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Forms - Modern Clean Design */
.form-control,
.form-select {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    background: var(--bg-primary);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.input-group {
    position: relative;
}

.input-group .form-control {
    padding-left: 3rem;
}

.input-group-text {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    background: transparent;
    border: none;
    color: var(--text-muted);
}

/* Tables - Modern Data Display */
.table-responsive {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    background: var(--bg-primary);
}

.table {
    border-collapse: separate;
    border-spacing: 0;
    margin-bottom: 0;
}

.table thead th {
    background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
    border-bottom: 2px solid var(--border-color);
    font-weight: 600;
    color: var(--text-primary);
    padding: 1.25rem 1rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    position: sticky;
    top: 0;
    z-index: 10;
}

.table tbody td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
    vertical-align: middle;
    font-size: 0.875rem;
}

.table tbody tr {
    transition: all var(--transition-fast);
}

.table tbody tr:hover {
    background-color: var(--gray-50);
    transform: scale(1.001);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* Alerts - Modern Notification Style */
.alert {
    border: none;
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1));
    transform: skewX(-15deg);
}

.alert-success {
    background: linear-gradient(135deg, var(--success-50), var(--success-100));
    border-left-color: var(--success-500);
    color: var(--success-700);
}

.alert-danger {
    background: linear-gradient(135deg, var(--danger-50), var(--danger-100));
    border-left-color: var(--danger-500);
    color: var(--danger-700);
}

.alert-warning {
    background: linear-gradient(135deg, var(--warning-50), var(--warning-100));
    border-left-color: var(--warning-500);
    color: var(--warning-700);
}

.alert-info {
    background: linear-gradient(135deg, var(--info-50), var(--info-100));
    border-left-color: var(--info-500);
    color: var(--info-700);
}

/* Dashboard Stats - Professional Muted Cards */
.stat-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card .card-body {
    padding: 1.5rem;
}

.stat-card .stat-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
    color: var(--primary-600);
}

.stat-card .stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    line-height: 1;
    color: var(--text-primary);
}

.stat-card .stat-label {
    font-size: 0.875rem;
    margin: 0.25rem 0 0;
    font-weight: 500;
    color: var(--text-muted);
}

/* Stat card color variants */
.stat-card.success .stat-icon {
    color: var(--success-600);
}

.stat-card.warning .stat-icon {
    color: var(--warning-600);
}

.stat-card.info .stat-icon {
    color: var(--info-600);
}

.stat-card.success {
    border-left: 4px solid var(--success-500);
}

.stat-card.warning {
    border-left: 4px solid var(--warning-500);
}

.stat-card.info {
    border-left: 4px solid var(--info-500);
}

.stat-card:not(.success):not(.warning):not(.info) {
    border-left: 4px solid var(--primary-500);
}

/* Badges - Modern Pill Design */
.badge {
    font-weight: 500;
    border-radius: var(--radius-xl);
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--success-500), var(--success-600)) !important;
}

.badge.bg-warning {
    background: linear-gradient(135deg, var(--warning-500), var(--warning-600)) !important;
}

.badge.bg-danger {
    background: linear-gradient(135deg, var(--danger-500), var(--danger-600)) !important;
}

.badge.bg-secondary {
    background: linear-gradient(135deg, var(--gray-400), var(--gray-500)) !important;
}

/* Dropdown Menu - Fix Z-Index Issues */
.dropdown-menu {
    z-index: 9999 !important;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem 0;
}

.dropdown {
    z-index: 9999 !important;
}

.btn-toolbar {
    z-index: 1000;
}

.dropdown-item {
    padding: 0.5rem 1rem;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--gray-50);
    color: var(--primary-600);
}

.dropdown-header {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

/* Modal - Modern Overlay */
.modal-content {
    border: none;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
}

.modal-header {
    background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
}

.modal-body {
    padding: 2rem;
}

.modal-footer {
    background: var(--gray-50);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
}

/* Search and Filters - Modern Input Design */
.search-container {
    position: relative;
    max-width: 400px;
}

.search-container .form-control {
    padding-left: 3rem;
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
}

.search-container .search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 10;
}

/* Pagination - Modern Navigation */
.pagination {
    gap: 0.25rem;
}

.pagination .page-link {
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination .page-link:hover {
    background: var(--primary-50);
    border-color: var(--primary-200);
    color: var(--primary-600);
    transform: translateY(-1px);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    border-color: var(--primary-600);
    color: white;
    box-shadow: var(--shadow-md);
}

/* File Upload - Modern Drag & Drop */
.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.file-upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(59, 130, 246, 0.05) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
}

.file-upload-area:hover {
    border-color: var(--primary-300);
    background: var(--primary-50);
    transform: scale(1.02);
}

.file-upload-area:hover::before {
    transform: translateX(100%);
}

.file-upload-area.dragover {
    border-color: var(--primary-500);
    background: var(--primary-100);
    box-shadow: var(--shadow-lg);
}

/* Animations */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(5deg); }
}

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

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

.animate-slide-up {
    animation: slideInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-slide-right {
    animation: slideInRight 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-200);
    border-top-color: var(--primary-600);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
                linear-gradient(135deg, var(--primary-500), var(--primary-700)) border-box;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
        padding: 1rem 0;
    }
    
    .login-card {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }
    
    .stat-card .card-body {
        padding: 1.5rem;
    }
    
    .stat-card .stat-number {
        font-size: 2rem;
    }
    
    .table-responsive {
        border-radius: var(--radius-md);
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .modal-body,
    .modal-header,
    .modal-footer {
        padding: 1.5rem;
    }
}

@media (max-width: 576px) {
    .login-card {
        padding: 1.5rem 1rem;
    }
    
    .sidebar .nav-link {
        margin: 0.125rem 0.5rem;
        padding: 0.75rem 1rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8125rem;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .navbar,
    .btn,
    .pagination,
    .modal {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
        break-inside: avoid;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* Dark mode support (future enhancement) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: var(--gray-900);
        --bg-secondary: var(--gray-800);
        --bg-tertiary: var(--gray-700);
        --text-primary: var(--gray-100);
        --text-secondary: var(--gray-300);
        --text-muted: var(--gray-400);
        --border-color: var(--gray-700);
        --border-light: var(--gray-600);
    }
}