:root {
            --primary: #3a86ff;
            --primary-dark: #2667cc;
            --secondary: #8338ec;
            --success: #4cc9f0;
            --warning: #ffbe0b;
            --danger: #ff006e;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --light-gray: #e9ecef;
            --border-radius: 10px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f0f2f5;
            color: var(--dark);
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            margin-bottom: 30px;
            padding: 25px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
        
        .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .premium-badge {
            background: linear-gradient(45deg, #ff9a00, #ff5e00);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: bold;
            display: inline-block;
            margin-left: 10px;
            vertical-align: middle;
        }
        
        .main-content {
            display: grid;
            grid-template-columns: 1fr 1.5fr;
            gap: 30px;
            margin-bottom: 30px;
        }
        
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        
        .card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 25px;
            transition: var(--transition);
            height: fit-content;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }
        
        .card-title {
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-gray);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .card-title i {
            margin-right: 10px;
        }
        
        .input-group {
            margin-bottom: 20px;
        }
        
        .input-with-btn {
            display: flex;
            gap: 10px;
        }
        
        input[type="url"] {
            flex: 1;
            padding: 15px;
            border: 2px solid var(--light-gray);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        
        input[type="url"]:focus {
            outline: none;
            border-color: var(--primary);
        }
        
        .btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            white-space: nowrap;
        }
        
        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }
        
        .btn i {
            margin-right: 8px;
        }
        
        .btn-premium {
            background: linear-gradient(45deg, var(--secondary), #9d4edd);
            margin-left: 10px;
        }
        
        .btn-premium:hover {
            background: linear-gradient(45deg, #6700a6, #9d4edd);
        }
        
        .btn-success {
            background-color: #38b000;
        }
        
        .btn-success:hover {
            background-color: #2d9100;
        }
        
        .btn-warning {
            background-color: var(--warning);
            color: var(--dark);
        }
        
        .btn-warning:hover {
            background-color: #e6a900;
        }
        
        .btn-danger {
            background-color: var(--danger);
        }
        
        .btn-danger:hover {
            background-color: #e00063;
        }
        
        .stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .stat-box {
            background: var(--light);
            padding: 15px;
            border-radius: var(--border-radius);
            text-align: center;
            border-left: 4px solid var(--primary);
        }
        
        .stat-box.warning {
            border-left-color: var(--warning);
        }
        
        .stat-box.success {
            border-left-color: #38b000;
        }
        
        .stat-box.danger {
            border-left-color: var(--danger);
        }
        
        .stat-value {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--primary);
        }
        
        .stat-box.warning .stat-value {
            color: var(--warning);
        }
        
        .stat-box.success .stat-value {
            color: #38b000;
        }
        
        .stat-box.danger .stat-value {
            color: var(--danger);
        }
        
        .stat-label {
            font-size: 0.9rem;
            color: var(--gray);
        }
        
        .tabs {
            display: flex;
            margin-bottom: 20px;
            border-bottom: 2px solid var(--light-gray);
            flex-wrap: wrap;
        }
        
        .tab {
            padding: 10px 20px;
            cursor: pointer;
            font-weight: 600;
            color: var(--gray);
            border-bottom: 3px solid transparent;
            transition: var(--transition);
        }
        
        .tab.active {
            color: var(--primary);
            border-bottom: 3px solid var(--primary);
        }
        
        .tab-content {
            display: none;
        }
        
        .tab-content.active {
            display: block;
        }
        
        .meta-tags-list {
            max-height: 500px;
            overflow-y: auto;
            margin-top: 15px;
            border: 1px solid var(--light-gray);
            border-radius: var(--border-radius);
        }
        
        .meta-item {
            padding: 15px;
            border-bottom: 1px solid var(--light-gray);
            transition: var(--transition);
        }
        
        .meta-item:hover {
            background-color: #f9f9f9;
        }
        
        .meta-item:last-child {
            border-bottom: none;
        }
        
        .meta-name {
            font-weight: bold;
            color: var(--primary);
            margin-bottom: 5px;
            display: flex;
            align-items: center;
        }
        
        .meta-name i {
            margin-right: 8px;
            font-size: 0.9rem;
        }
        
        .meta-content {
            color: var(--dark);
            word-break: break-word;
            line-height: 1.5;
        }
        
        .meta-status {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-top: 8px;
        }
        
        .status-good {
            background-color: rgba(56, 176, 0, 0.1);
            color: #2d9100;
        }
        
        .status-warning {
            background-color: rgba(255, 190, 11, 0.1);
            color: #b38700;
        }
        
        .status-bad {
            background-color: rgba(255, 0, 110, 0.1);
            color: #cc0058;
        }
        
        .status-info {
            background-color: rgba(58, 134, 255, 0.1);
            color: var(--primary);
        }
        
        .premium-features {
            display: none;
            margin-top: 25px;
            padding-top: 25px;
            border-top: 2px dashed var(--light-gray);
        }
        
        .premium-features.active {
            display: block;
        }
        
        .feature-list {
            list-style-type: none;
        }
        
        .feature-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--light-gray);
            display: flex;
            align-items: center;
        }
        
        .feature-list li:last-child {
            border-bottom: none;
        }
        
        .feature-list i {
            color: #38b000;
            margin-right: 10px;
            font-size: 1.2rem;
        }
        
        .premium-locked {
            opacity: 0.7;
            position: relative;
        }
        
        .premium-locked::after {
            content: "PREMIUM";
            position: absolute;
            top: 5px;
            right: 0;
            background: var(--secondary);
            color: white;
            font-size: 0.7rem;
            padding: 2px 8px;
            border-radius: 10px;
        }
        
        .seo-score {
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 20px 0;
        }
        
        .score-circle {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: conic-gradient(#38b000 0% 70%, var(--warning) 70% 90%, var(--danger) 90% 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        
        .score-inner {
            width: 90px;
            height: 90px;
            background: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
        }
        
        .score-value {
            font-size: 2rem;
            font-weight: bold;
            color: var(--dark);
        }
        
        .score-label {
            font-size: 0.9rem;
            color: var(--gray);
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }
        
        .comparison-table th {
            background-color: var(--light);
            padding: 12px;
            text-align: left;
            border-bottom: 2px solid var(--light-gray);
        }
        
        .comparison-table td {
            padding: 12px;
            border-bottom: 1px solid var(--light-gray);
        }
        
        .comparison-table tr:hover {
            background-color: #f9f9f9;
        }
        
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            align-items: center;
            justify-content: center;
        }
        
        .modal-content {
            background: white;
            width: 90%;
            max-width: 500px;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }
        
        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .close-modal {
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--gray);
        }
        
        .premium-option {
            background: linear-gradient(45deg, #f8f9fa, #e9ecef);
            padding: 20px;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            border: 2px solid transparent;
            transition: var(--transition);
            cursor: pointer;
        }
        
        .premium-option:hover {
            border-color: var(--secondary);
            transform: translateY(-3px);
        }
        
        .premium-option h4 {
            color: var(--secondary);
            margin-bottom: 10px;
        }
        
        .premium-option .price {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--dark);
        }
        
        footer {
            text-align: center;
            margin-top: 30px;
            padding: 20px;
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        .notification {
            position: fixed;
            bottom: 20px;
            right: 20px;
            padding: 15px 25px;
            background: var(--primary);
            color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            display: none;
            z-index: 1001;
            max-width: 350px;
        }
        
        .notification.show {
            display: block;
            animation: fadeInOut 3s ease;
        }
        
        @keyframes fadeInOut {
            0%, 100% { opacity: 0; transform: translateY(20px); }
            10%, 90% { opacity: 1; transform: translateY(0); }
        }
        
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255,255,255,.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
            margin-right: 10px;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        .export-options {
            display: flex;
            gap: 10px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        
        .export-btn {
            background-color: var(--light-gray);
            color: var(--dark);
            padding: 10px 15px;
            border-radius: var(--border-radius);
            cursor: pointer;
            display: flex;
            align-items: center;
            transition: var(--transition);
        }
        
        .export-btn:hover {
            background-color: var(--primary);
            color: white;
        }
        
        .sample-urls {
            margin-top: 15px;
            font-size: 0.9rem;
        }
        
        .sample-urls span {
            color: var(--primary);
            cursor: pointer;
            margin-right: 15px;
            text-decoration: underline;
        }
        
        .sample-urls span:hover {
            color: var(--primary-dark);
        }
        
        @media (max-width: 768px) {
            .input-with-btn {
                flex-direction: column;
            }
            
            .stats {
                grid-template-columns: 1fr;
            }
            
            .tabs {
                overflow-x: auto;
            }
        }