.container {
            background-color: white;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            width: 100%;
            max-width: 600px;
            padding: 30px;
        }
        
        h1 {
            color: #2c3e50;
            text-align: center;
            margin-bottom: 10px;
            font-size: 28px;
        }
        
        .description {
            text-align: center;
            color: #7f8c8d;
            margin-bottom: 30px;
            font-size: 16px;
        }
        
        .input-group {
            margin-bottom: 25px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            color: #34495e;
            font-weight: bold;
        }
        
        input[type="text"] {
            width: 100%;
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 18px;
            transition: border-color 0.3s;
        }
        
        input[type="text"]:focus {
            border-color: #3498db;
            outline: none;
        }
        
        button {
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 8px;
            padding: 15px 25px;
            font-size: 18px;
            cursor: pointer;
            width: 100%;
            transition: background-color 0.3s;
        }
        
        button:hover {
            background-color: #2980b9;
        }
        
        .result {
            margin-top: 25px;
            padding: 20px;
            background-color: #f8f9fa;
            border-radius: 8px;
            border-left: 4px solid #3498db;
        }
        
        .result h3 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        
        .result-text {
            font-size: 20px;
            color: #27ae60;
            font-weight: bold;
            word-break: break-all;
        }
        
        .error {
            color: #e74c3c;
            margin-top: 10px;
            font-weight: bold;
        }
        
        .examples {
            margin-top: 30px;
            padding: 15px;
            background-color: #f8f9fa;
            border-radius: 8px;
        }
        
        .examples h3 {
            color: #2c3e50;
            margin-bottom: 10px;
        }
        
        .examples ul {
            list-style-type: none;
        }
        
        .examples li {
            padding: 5px 0;
            color: #7f8c8d;
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 20px;
            }
            
            h1 {
                font-size: 24px;
            }
            
            input[type="text"], button {
                padding: 12px;
                font-size: 16px;
            }
        }