* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        
        
        .container {
            max-width: 800px;
            margin: 30px auto;
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        h1 {
            text-align: center;
            color: #4285f4;
            margin-bottom: 20px;
        }
        
        .description {
            text-align: center;
            margin-bottom: 30px;
            color: #666;
        }
        
        .input-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        
        input[type="text"], 
        input[type="url"], 
        textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
            transition: border 0.3s;
        }
        
        input[type="text"]:focus, 
        input[type="url"]:focus, 
        textarea:focus {
            border-color: #4285f4;
            outline: none;
        }
        
        button {
            background-color: #4285f4;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: background 0.3s;
            display: block;
            width: 100%;
            margin-top: 10px;
        }
        
        button:hover {
            background-color: #3367d6;
        }
        
        .qr-result {
            text-align: center;
            margin-top: 30px;
            padding: 20px;
            border: 2px dashed #ddd;
            border-radius: 5px;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        
        #qrCode {
            max-width: 100%;
            height: auto;
            margin: 20px 0;
        }
        
        .download-btn {
            background-color: #34a853;
            margin-top: 15px;
            max-width: 200px;
        }
        
        .download-btn:hover {
            background-color: #2d9248;
        }
        
        .options {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }
        
        .option-group {
            flex: 1;
        }
        
        select {
            width: 100%;
            padding: 10px;
            border: 2px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
        }
        
        @media (max-width: 600px) {
            .options {
                flex-direction: column;
            }
            
            .container {
                padding: 20px;
            }
        }