* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        /* Navigation Menu */
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .nav-brand {
            font-size: 24px;
            font-weight: bold;
            background: linear-gradient(135deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-decoration: none;
        }
        
        .nav-menu {
            display: flex;
            gap: 30px;
            list-style: none;
        }
        
        .nav-link {
            color: #333;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
            cursor: pointer;
        }
        
        .nav-link:hover {
            color: #667eea;
        }
        
        /* Main Content */
        .main-content {
            flex: 1;
            padding: 40px 20px;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .header {
            text-align: center;
            color: white;
            margin-bottom: 40px;
        }
        
        .header h1 {
            font-size: 3em;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }
        
        .header p {
            font-size: 1.2em;
            opacity: 0.95;
        }
        
        .tester-card {
            background: white;
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }
        
        .input-group {
            display: flex;
            gap: 10px;
            margin-bottom: 15px;
        }
        
        .protocol-selector {
            display: flex;
            gap: 5px;
            margin-right: 5px;
        }
        
        .protocol-btn {
            padding: 15px 20px;
            background: white;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .protocol-btn.active {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border-color: transparent;
        }
        
        .url-input {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            font-size: 16px;
            transition: all 0.3s;
        }
        
        .url-input:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }
        
        .btn {
            padding: 15px 30px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }
        
        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }
        
        .quick-test-buttons {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 25px;
        }
        
        .quick-btn {
            padding: 10px 18px;
            background: #f8f9fa;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.2s;
            font-weight: 500;
        }
        
        .quick-btn:hover {
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
            border-color: #667eea;
            transform: translateY(-1px);
        }
        
        .status-message {
            padding: 15px 20px;
            border-radius: 10px;
            margin-bottom: 20px;
            display: none;
            animation: slideIn 0.3s ease;
        }
        
        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .status-message.show {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .status-success {
            background: #e7f5e7;
            border: 1px solid #4caf50;
            color: #2e7d32;
        }
        
        .status-error {
            background: #fee;
            border: 1px solid #fcc;
            color: #c00;
        }
        
        .status-info {
            background: #e3f2fd;
            border: 1px solid #2196f3;
            color: #1565c0;
        }
        
        .results-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 30px;
        }
        
        .preview-card {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 25px;
            border: 1px solid #e0e0e0;
        }
        
        .preview-card h3 {
            color: #333;
            margin-bottom: 20px;
            font-size: 1.4em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .social-preview {
            background: white;
            border: 1px solid #ddd;
            border-radius: 12px;
            overflow: hidden;
            margin-bottom: 20px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            transition: transform 0.2s;
        }
        
        .social-preview:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.12);
        }
        
        .preview-image {
            width: 100%;
            height: 250px;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #999;
            overflow: hidden;
            position: relative;
        }
        
        .preview-image.no-image {
            background: repeating-linear-gradient(
                45deg,
                #f5f5f5,
                #f5f5f5 10px,
                #fff 10px,
                #fff 20px
            );
        }
        
        .preview-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .image-placeholder {
            text-align: center;
            padding: 20px;
        }
        
        .image-placeholder-icon {
            font-size: 48px;
            margin-bottom: 10px;
            opacity: 0.5;
        }
        
        .image-placeholder-text {
            color: #999;
            font-size: 14px;
        }
        
        .preview-content {
            padding: 15px;
        }
        
        .preview-url {
            color: #65676b;
            font-size: 12px;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        .preview-title {
            color: #050505;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.3;
            min-height: 21px;
        }
        
        .preview-description {
            color: #65676b;
            font-size: 14px;
            line-height: 1.4;
            min-height: 20px;
        }
        
        .tags-card {
            background: #f8f9fa;
            border-radius: 15px;
            padding: 25px;
            border: 1px solid #e0e0e0;
        }
        
        .tags-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .stat-box {
            background: white;
            padding: 15px;
            border-radius: 10px;
            text-align: center;
            border: 1px solid #e0e0e0;
        }
        
        .stat-number {
            font-size: 24px;
            font-weight: bold;
            color: #667eea;
        }
        
        .stat-label {
            font-size: 12px;
            color: #666;
            margin-top: 5px;
        }
        
        .tags-table {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        
        .tag-row {
            display: flex;
            border-bottom: 1px solid #eee;
            transition: background 0.2s;
        }
        
        .tag-row:hover {
            background: #f8f9fa;
        }
        
        .tag-property {
            padding: 14px 16px;
            font-weight: 600;
            color: #667eea;
            min-width: 180px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .tag-content {
            padding: 14px 16px;
            color: #333;
            flex: 1;
            word-break: break-all;
            font-size: 14px;
        }
        
        .badge {
            display: inline-block;
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 10px;
            font-weight: 600;
            text-transform: uppercase;
        }
        
        .badge-success {
            background: #d4edda;
            color: #155724;
        }
        
        .badge-error {
            background: #f8d7da;
            color: #721c24;
        }
        
        .badge-warning {
            background: #fff3cd;
            color: #856404;
        }
        
        .badge-info {
            background: #d1ecf1;
            color: #0c5460;
        }
        
        .loading {
            display: none;
            text-align: center;
            padding: 30px;
        }
        
        .loading.show {
            display: block;
        }
        
        .spinner {
            border: 3px solid #f3f3f3;
            border-top: 3px solid #667eea;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            animation: spin 1s linear infinite;
            margin: 0 auto 20px;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* Footer */
        .footer {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 40px 20px;
            margin-top: 60px;
            border-top: 1px solid rgba(0,0,0,0.1);
        }
        
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }
        
        .footer-section h4 {
            color: #333;
            margin-bottom: 15px;
            font-size: 18px;
        }
        
        .footer-section p {
            color: #666;
            line-height: 1.6;
            font-size: 14px;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #666;
            text-decoration: none;
            transition: color 0.3s;
            font-size: 14px;
        }
        
        .footer-links a:hover {
            color: #667eea;
        }
        
        .footer-bottom {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #e0e0e0;
            color: #999;
            font-size: 13px;
        }
        
        /* Modal */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 2000;
            animation: fadeIn 0.3s;
        }
        
        .modal.show {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        .modal-content {
            background: white;
            border-radius: 20px;
            padding: 40px;
            max-width: 500px;
            width: 90%;
            animation: slideUp 0.3s;
        }
        
        @keyframes slideUp {
            from {
                transform: translateY(50px);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }
        
        .modal-header {
            margin-bottom: 20px;
        }
        
        .modal-header h2 {
            color: #333;
            font-size: 24px;
        }
        
        .modal-body {
            color: #666;
            line-height: 1.6;
        }
        
        .modal-close {
            margin-top: 30px;
            text-align: center;
        }
        
        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: #999;
        }
        
        .empty-state-icon {
            font-size: 64px;
            margin-bottom: 20px;
            opacity: 0.5;
        }
        
        .empty-state-title {
            font-size: 24px;
            color: #666;
            margin-bottom: 10px;
        }
        
        .empty-state-text {
            font-size: 16px;
            color: #999;
        }
        
        /* Hidden iframe */
        #hiddenFrame {
            position: absolute;
            left: -9999px;
            width: 1px;
            height: 1px;
            opacity: 0;
        }
        
        @media (max-width: 768px) {
            .results-container {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
            
            .tags-stats {
                grid-template-columns: 1fr;
            }
            
            .nav-menu {
                gap: 15px;
                font-size: 14px;
            }
            
            .header h1 {
                font-size: 2em;
            }
        }
		/* Policy and About Pages Styles */
.policy-card, .about-card, .contact-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    margin: 40px auto;
    max-width: 900px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.policy-card h1, .about-card h1, .contact-card h1 {
    color: #333;
    margin-bottom: 20px;
    font-size: 2.5em;
}

.policy-card h2, .about-card h2, .contact-card h2 {
    color: #667eea;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.8em;
}

.policy-card h3, .about-card h3, .contact-card h3 {
    color: #555;
    margin-top: 20px;
    margin-bottom: 10px;
}

.policy-card ul, .about-card ul {
    margin-left: 30px;
    line-height: 1.8;
    color: #666;
}

.policy-card p, .about-card p, .contact-card p {
    line-height: 1.8;
    color: #666;
    margin-bottom: 15px;
}

.last-updated {
    color: #999;
    font-style: italic;
    margin-bottom: 30px;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.feature-box {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}

.feature-box h3 {
    color: #667eea;
    margin-bottom: 10px;
}

/* Contact Form */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 30px 0;
}

.contact-item {
    margin-bottom: 25px;
}

.contact-item h3 {
    color: #667eea;
    margin-bottom: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.faq-section {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid #e0e0e0;
}

.faq-item {
    margin-bottom: 25px;
}

.faq-item h3 {
    color: #333;
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}