/* Theme System - No Flash on Load */
        :root {
            --red-primary: #ff0033;
            --red-dark: #cc0029;
            --red-light: #ff3355;
            --black: #0a0a0a;
            --black-light: #1a1a1a;
            --black-lighter: #2a2a2a;
            --gray-dark: #333333;
            --gray-medium: #555555;
            --gray-light: #888888;
            --white: #ffffff;
            --text-primary: #e0e0e0;
            --text-secondary: #b0b0b0;
            --border: #2a2a2a;
        }

        [data-theme="light"] {
            --black: #f5f5f5;
            --black-light: #ffffff;
            --black-lighter: #f0f0f0;
            --gray-dark: #e0e0e0;
            --gray-medium: #d0d0d0;
            --text-primary: #1a1a1a;
            --text-secondary: #666666;
            --border: #e0e0e0;
        }

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

        body {
            font-family: 'Arial', 'Helvetica', sans-serif;
            background: var(--black);
            color: var(--text-primary);
            line-height: 1.5;
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* Header */
        .tube-header {
            background: var(--black-light);
            border-bottom: 3px solid var(--red-primary);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
            transition: background-color 0.3s ease;
        }

        .header-top {
            background: var(--black);
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
            transition: background-color 0.3s ease;
        }

        .header-top-inner {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-secondary);
        }

        .top-links {
            display: flex;
            gap: 20px;
        }

        .top-link {
            color: var(--text-secondary);
            transition: color 0.3s;
        }

        .top-link:hover {
            color: var(--red-primary);
        }

        .top-stats {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .top-stat {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .top-stat i {
            color: var(--red-primary);
        }

        /* Theme Toggle */
        .theme-toggle {
            background: var(--black-lighter);
            border: 1px solid var(--border);
            border-radius: 20px;
            width: 50px;
            height: 26px;
            position: relative;
            cursor: pointer;
            transition: all 0.3s;
        }

        .theme-toggle-slider {
            position: absolute;
            top: 2px;
            left: 2px;
            width: 20px;
            height: 20px;
            background: var(--red-primary);
            border-radius: 50%;
            transition: transform 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            color: white;
        }

        [data-theme="light"] .theme-toggle-slider {
            transform: translateX(24px);
        }

        /* Mobile Theme Toggle */
        .mobile-theme-toggle {
            display: none;
        }

        /* Main Header */
        .header-main {
            max-width: 1400px;
            margin: 0 auto;
            padding: 12px 20px;
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 28px;
            font-weight: 900;
            color: var(--text-primary);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: var(--red-primary);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: white;
        }

        .logo-text {
            letter-spacing: -1px;
        }

        .logo-text span {
            color: var(--red-primary);
        }

        /* Search */
        .search-container {
            flex: 1;
            max-width: 600px;
        }

        .search-wrapper {
            display: flex;
            background: var(--black-lighter);
            border: 2px solid var(--border);
            border-radius: 4px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .search-wrapper:focus-within {
            border-color: var(--red-primary);
        }

        .search-input {
            flex: 1;
            background: transparent;
            border: none;
            padding: 10px 16px;
            color: var(--text-primary);
            font-size: 14px;
            outline: none;
        }

        .search-input::placeholder {
            color: var(--text-secondary);
        }

        .search-btn {
            background: var(--red-primary);
            color: white;
            border: none;
            padding: 10px 24px;
            font-weight: 700;
            cursor: pointer;
            transition: background 0.3s;
        }

        .search-btn:hover {
            background: var(--red-dark);
        }

        /* Header Actions */
        .header-actions {
            display: flex;
            gap: 12px;
        }

        .header-btn {
            background: var(--black-lighter);
            border: 1px solid var(--border);
            color: var(--text-primary);
            padding: 8px 16px;
            border-radius: 4px;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .header-btn:hover {
            background: var(--red-primary);
            border-color: var(--red-primary);
            color: white;
        }

        .header-btn i {
            font-size: 14px;
        }

        /* Navigation */
        .tube-nav {
            background: var(--black-light);
            border-bottom: 1px solid var(--border);
            transition: background-color 0.3s ease;
        }

        .nav-inner {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-inner::-webkit-scrollbar {
            display: none;
        }

        .nav-item {
            padding: 12px 18px;
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
            cursor: pointer;
            transition: all 0.3s;
            border-bottom: 3px solid transparent;
        }

        .nav-item:hover {
            color: var(--text-primary);
            background: var(--black-lighter);
        }

        .nav-item.active {
            color: var(--red-primary);
            border-bottom-color: var(--red-primary);
        }

        /* Container */
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 20px;
        }

        .tube-layout {
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 20px;
        }

        /* Sidebar */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .sidebar-section {
            background: var(--black-light);
            border-radius: 4px;
            padding: 16px;
            border: 1px solid var(--border);
            transition: background-color 0.3s ease;
        }

        .sidebar-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-link {
            padding: 8px 12px;
            color: var(--text-secondary);
            font-size: 13px;
            border-radius: 3px;
            cursor: pointer;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .sidebar-link:hover {
            background: var(--black-lighter);
            color: var(--text-primary);
        }

        .sidebar-link.active {
            background: var(--red-primary);
            color: white;
        }

        /* Alphabet Filter */
        .alphabet-filter {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 4px;
        }

        .letter-btn {
            padding: 8px;
            background: var(--black-lighter);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            border-radius: 3px;
            font-size: 13px;
            font-weight: 700;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s;
        }

        .letter-btn:hover {
            background: var(--red-primary);
            color: white;
            border-color: var(--red-primary);
        }

        .letter-btn.active {
            background: var(--red-primary);
            color: white;
            border-color: var(--red-primary);
        }

        .letter-btn.disabled {
            opacity: 0.3;
            cursor: not-allowed;
        }

        /* Main Content */
        .main-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        /* Content Header */
        .content-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }

        .content-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .content-meta {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .content-meta strong {
            color: var(--red-primary);
        }

        .view-filters {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .filter-select {
            background: var(--black-light);
            border: 1px solid var(--border);
            color: var(--text-primary);
            padding: 8px 12px;
            border-radius: 4px;
            font-size: 13px;
            cursor: pointer;
            outline: none;
            transition: all 0.3s;
        }

        .filter-select:focus {
            border-color: var(--red-primary);
        }

        /* Models Grid */
        .models-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
        }

        .model-card {
            background: var(--black-light);
            border-radius: 6px;
            overflow: hidden;
            transition: all 0.3s;
            cursor: pointer;
            border: 1px solid var(--border);
        }

        .model-card:hover {
            transform: translateY(-4px);
            border-color: var(--red-primary);
            box-shadow: 0 8px 20px rgba(255, 0, 51, 0.2);
        }

        .model-avatar {
            width: 100%;
            padding-top: 100%;
            position: relative;
            background: var(--black-lighter);
            overflow: hidden;
        }

        .model-avatar-inner {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 48px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--black-lighter) 0%, var(--gray-dark) 100%);
        }

        [data-theme="light"] .model-avatar-inner {
            background: linear-gradient(135deg, var(--gray-dark) 0%, var(--gray-medium) 100%);
        }

        .model-card:hover .model-avatar-inner {
            background: linear-gradient(135deg, var(--red-primary) 0%, var(--red-dark) 100%);
            color: white;
        }

        .model-info {
            padding: 12px;
        }

        .model-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .model-name:hover {
            color: var(--red-primary);
        }

        .model-stats {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 11px;
            color: var(--text-secondary);
        }

        .model-verified {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .model-verified i {
            color: var(--red-primary);
        }

        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 6px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .page-num {
            min-width: 38px;
            height: 38px;
            background: var(--black-light);
            border: 1px solid var(--border);
            border-radius: 3px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
        }

        @media (hover: hover) and (pointer: fine) {
            .page-num:hover:not(.disabled):not(.active) {
                background: var(--red-primary);
                border-color: var(--red-primary);
                color: white;
            }
        }

        .page-num.active {
            background: var(--red-primary);
            border-color: var(--red-primary);
            color: white;
        }

        .page-num.disabled {
            opacity: 0.3;
            cursor: not-allowed;
        }

        /* Loading */
        .loading {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 80px 20px;
        }

        .loader {
            width: 50px;
            height: 50px;
            border: 4px solid var(--black-lighter);
            border-top-color: var(--red-primary);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

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

        .loading-text {
            margin-top: 20px;
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* Empty */
        .empty {
            text-align: center;
            padding: 80px 20px;
        }

        .empty i {
            font-size: 64px;
            color: var(--gray-dark);
            margin-bottom: 20px;
        }

        .empty h3 {
            font-size: 20px;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .empty p {
            color: var(--text-secondary);
        }

        /* Footer */
        .tube-footer {
            background: var(--black-light);
            border-top: 1px solid var(--border);
            margin-top: 40px;
            padding: 24px 20px;
            transition: background-color 0.3s ease;
        }

        .footer-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-secondary);
        }

        .footer-links {
            display: flex;
            gap: 20px;
        }

        .footer-link {
            transition: color 0.3s;
        }

        .footer-link:hover {
            color: var(--red-primary);
        }

        /* Cookie Banner */
        .cookie-banner {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--black-light);
            border-top: 2px solid var(--red-primary);
            padding: 16px 20px;
            z-index: 2000;
            box-shadow: 0 -2px 10px rgba(0,0,0,0.5);
            transition: background-color 0.3s ease;
        }

        .cookie-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }

        .cookie-text {
            flex: 1;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .cookie-actions {
            display: flex;
            gap: 10px;
        }

        .cookie-btn {
            padding: 8px 20px;
            border-radius: 3px;
            border: none;
            font-weight: 700;
            font-size: 13px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-accept {
            background: var(--red-primary);
            color: white;
        }

        .btn-accept:hover {
            background: var(--red-dark);
        }

        .btn-decline {
            background: var(--black-lighter);
            color: var(--text-primary);
            border: 1px solid var(--border);
        }

        .btn-decline:hover {
            background: var(--gray-dark);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .tube-layout {
                grid-template-columns: 1fr;
            }

            .sidebar {
                display: none;
            }

            .models-grid {
                grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .header-top {
                display: none;
            }

            .header-main {
                flex-wrap: wrap;
                padding: 10px 15px;
                gap: 12px;
                justify-content: space-between;
            }

            .logo {
                font-size: 22px;
                flex: 0 0 auto;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

            .mobile-theme-toggle {
                display: block;
                flex: 0 0 auto;
            }

            .search-container {
                order: 3;
                flex: 1 1 100%;
                max-width: 100%;
            }

            .header-actions {
                display: none;
            }

            .models-grid {
                grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
                gap: 12px;
            }

            .content-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .view-filters {
                width: 100%;
            }

            .filter-select {
                flex: 1;
                height: 44px;
            }

            .cookie-inner {
                flex-direction: column;
                text-align: center;
            }

            .footer-inner {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }

            .footer-links {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 10px 20px;
                width: 100%;
                max-width: 300px;
            }

            .footer-link {
                padding: 4px;
            }

            .container {
                padding: 15px;
            }

            .pagination {
                gap: 6px;
            }

            .page-num {
                min-width: 44px;
                height: 44px;
                font-size: 15px;
            }
        }

        @media (max-width: 480px) {
            .footer-links {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px 12px;
                font-size: 11px;
            }

            .page-num {
                min-width: 40px;
                height: 40px;
                font-size: 14px;
            }

            .models-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* Mobile Alphabet Filter */
        .mobile-alphabet {
            display: none;
            background: var(--black-light);
            padding: 12px;
            border-radius: 6px;
            margin-bottom: 16px;
            border: 1px solid var(--border);
        }

        .mobile-alphabet-title {
            font-size: 12px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        @media (max-width: 1024px) {
            .mobile-alphabet {
                display: block;
            }
        }