* {
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        

        
        .container {
            max-width: 600px;
            margin: 0 auto;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            overflow: hidden;
        }
        
        header {
            background: linear-gradient(135deg, #3498db, #1a5276);
            color: white;
            padding: 20px;
            text-align: center;
        }
        
        h1 {
            margin: 0;
            font-size: 24px;
        }
        
        .form-section {
            padding: 25px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
        }
        
        .form-section input[type="url"],
        .form-section input[type="text"],
        .form-section select, 
        .form-section textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 16px;
            transition: border-color 0.3s;
        }
        
        input:focus, textarea:focus {
            border-color: #3498db;
            outline: none;
            box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
        }
        
        textarea {
            min-height: 100px;
            resize: vertical;
        }
        
        .checkbox-group {
            display: flex;
            align-items: center;
            margin-top: 10px;
        }
        
        .checkbox-group input[type="checkbox"] {
            margin-right: 10px;
        }
        
        button {
            background: linear-gradient(135deg, #3498db, #1a5276);
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            width: 100%;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 10px rgba(52, 152, 219, 0.4);
        }
        
        button:active {
            transform: translateY(0);
        }
        
        .preview-section {
            margin-top: 30px;
            padding: 20px;
            border: 1px solid #eee;
            border-radius: 8px;
            background-color: #f9f9f9;
        }
        
        .preview-section h3 {
            margin-top: 0;
            color: #2c3e50;
            border-bottom: 2px solid #3498db;
            padding-bottom: 10px;
        }
        
        .preview-item {
            margin-bottom: 15px;
            padding: 10px;
            background-color: white;
            border-radius: 6px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        
        .preview-item label {
            font-weight: 600;
            color: #7f8c8d;
            font-size: 14px;
            margin-bottom: 5px;
        }
        
        .preview-item .value {
            font-weight: 500;
            color: #2c3e50;
        }
        
        .favicon-display {
            width: 32px;
            height: 32px;
            margin-right: 15px;
            vertical-align: middle;
        }
        
        .status-message {
            margin-top: 20px;
            padding: 15px;
            border-radius: 6px;
            display: none;
        }
        
        .status-message.success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        
        .status-message.error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        
        .status-message.warning {
            background-color: #fff3cd;
            color: #856404;
            border: 1px solid #ffeeba;
        }
        
        .loading {
            display: none;
            text-align: center;
            padding: 20px;
        }
        
        .spinner {
            border: 4px solid rgba(52, 152, 219, 0.3);
            border-radius: 50%;
            border-top: 4px solid #3498db;
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 0 auto;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .debug-info {
            margin-top: 20px;
            padding: 15px;
            background-color: #f8f9fa;
            border-radius: 6px;
            font-family: monospace;
            font-size: 14px;
            display: none;
        }