* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary: #6366f1;
            --primary-hover: #4f46e5;
            --secondary: #8b5cf6;
            --bg-main: #0f172a;
            --bg-secondary: #1e293b;
            --bg-tertiary: #334155;
            --text-primary: #f1f5f9;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --border: #334155;
            --success: #10b981;
            --danger: #ef4444;
            --warning: #f59e0b;
        }
        
        [data-theme="light"] {
            --bg-main: #f8fafc;
            --bg-secondary: #ffffff;
            --bg-tertiary: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #64748b;
            --border: #e2e8f0;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 15px;
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        
        a {
            color: inherit;
            text-decoration: none;
        }
        
        /* Header */
        .header {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        
        .logo-section {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        
        .logo {
            font-size: 24px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .header-search {
            flex: 1;
            max-width: 500px;
            margin: 0 32px;
        }
        
        .search-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }
        
        .search-input {
            width: 100%;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 10px 16px 10px 44px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
            transition: all 0.2s;
        }
        
        .search-input:focus {
            border-color: var(--primary);
            background: var(--bg-main);
        }
        
        .search-icon {
            position: absolute;
            left: 16px;
            color: var(--text-muted);
            pointer-events: none;
        }
        
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        
        .icon-btn {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-tertiary);
            color: var(--text-secondary);
            transition: all 0.2s;
            cursor: pointer;
            position: relative;
            border: none;
        }
        
        .icon-btn:hover {
            background: var(--primary);
            color: white;
        }
        
        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s;
        }
        
        .user-avatar:hover {
            transform: scale(1.1);
        }
        
        /* Mobile Search Bar */
        .mobile-search {
            display: none;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            padding: 12px 16px;
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        
        .mobile-search .search-wrapper {
            width: 100%;
        }
        
        /* Main Container */
        .main-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 24px;
        }
        
        /* Page Header */
        .page-header {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 32px;
            margin-bottom: 24px;
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 13px;
            margin-bottom: 16px;
        }
        
        .breadcrumb a {
            color: var(--primary);
            transition: opacity 0.2s;
        }
        
        .breadcrumb a:hover {
            opacity: 0.8;
        }
        
        .page-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        
        .page-subtitle {
            color: var(--text-muted);
            font-size: 16px;
        }
        
        .total-count {
            color: var(--primary);
            font-weight: 600;
        }
        
        /* Alphabet Navigation */
        .alphabet-nav {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 24px;
            position: sticky;
            top: 80px;
            z-index: 100;
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        
        .alphabet-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: center;
        }
        
        .alphabet-btn {
            min-width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.2s;
            padding: 0 12px;
        }
        
        .alphabet-btn:hover:not(.disabled) {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
            transform: translateY(-2px);
        }
        
        .alphabet-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
        }
        
        .alphabet-btn.disabled {
            opacity: 0.3;
            cursor: not-allowed;
        }
        
        /* Models Grid */
        .models-section {
            margin-bottom: 40px;
        }
        
        .section-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
        }
        
        .section-letter {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            color: white;
            font-size: 24px;
            font-weight: 700;
        }
        
        .section-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
        }
        
        .section-count {
            color: var(--text-muted);
            font-size: 14px;
        }
        
        .models-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
        }
        
        .model-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all 0.2s;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        
        .model-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity 0.2s;
        }
        
        .model-card:hover {
            border-color: var(--primary);
            transform: translateX(4px);
        }
        
        .model-card:hover::before {
            opacity: 1;
        }
        
        .model-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: white;
            flex-shrink: 0;
            font-size: 18px;
        }
        
        .model-info {
            flex: 1;
            min-width: 0;
        }
        
        .model-name {
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            font-size: 14px;
        }
        
        .model-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        
        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 32px;
            padding: 24px;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 12px;
            flex-wrap: wrap;
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        
        .page-btn {
            min-width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text-secondary);
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
        }
        
        .page-btn:hover:not(.disabled) {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
        }
        
        .page-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
        }
        
        .page-btn.disabled {
            opacity: 0.3;
            cursor: not-allowed;
        }
        
        /* Loading */
        .loading-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 80px;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 12px;
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        .badge {
            position: absolute;
            top: -4px;
            right: -4px;
            background: var(--danger);
            color: white;
            font-size: 10px;
            font-weight: 700;
            padding: 2px 6px;
            border-radius: 10px;
            min-width: 18px;
            text-align: center;
        }
        .spinner {
            width: 48px;
            height: 48px;
            border: 3px solid var(--bg-tertiary);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 16px;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .loading-text {
            color: var(--text-muted);
            font-size: 14px;
        }
        
        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 12px;
            transition: background-color 0.3s ease, border-color 0.3s ease;
        }
        
        .empty-icon {
            font-size: 64px;
            color: var(--text-muted);
            margin-bottom: 16px;
            opacity: 0.5;
        }
        
        .empty-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        
        .empty-text {
            color: var(--text-muted);
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .header-container {
                padding: 0 16px;
                height: 56px;
            }
            
            .header-search {
                display: none;
            }
            
            .mobile-search {
                display: block;
            }
            
            .logo {
                font-size: 20px;
            }
            
            .icon-btn {
                width: 36px;
                height: 36px;
            }
            
            .user-avatar {
                width: 36px;
                height: 36px;
            }
            
            .header-actions {
                gap: 8px;
            }
            
            .main-container {
                padding: 16px;
            }
            
            .page-header {
                padding: 20px;
            }
            
            .page-title {
                font-size: 24px;
            }
            
            .page-subtitle {
                font-size: 14px;
            }
            
            .alphabet-nav {
                top: 72px;
                padding: 16px;
            }
            
            .alphabet-grid {
                gap: 6px;
            }
            
            .alphabet-btn {
                min-width: 36px;
                height: 36px;
                font-size: 13px;
                padding: 0 8px;
            }
            
            .models-grid {
                grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
                gap: 12px;
            }
            
            .model-card {
                padding: 12px;
            }
            
            .model-avatar {
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
            
            .section-letter {
                width: 40px;
                height: 40px;
                font-size: 20px;
            }
            
            .section-title {
                font-size: 18px;
            }
            
            .pagination {
                padding: 16px;
                gap: 6px;
            }
            
            .page-btn {
                min-width: 36px;
                height: 36px;
                font-size: 14px;
            }
        }