body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f0f2f5;
            margin: 0;
            padding: 20px;
            color: #333;
        }
        
        .qr-container {
            max-width: 600px;
            margin: 50px auto;
            padding: 30px;
            background: #ffffff;
            border-radius: 15px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            border: 1px solid #ddd;
        }
        
        h2 {
            text-align: center;
            /* color: #4a90e2; */
            margin-top: 0;
        }
        
        .description {
            text-align: center;
            margin-bottom: 25px;
            color: #555;
            line-height: 1.5;
        }
        
        .qr-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .qr-input {
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #ddd;
            background: white;
            font-size: 16px;
            transition: all 0.3s ease;
        }
        
        .qr-input:focus {
            outline: none;
            border-color: #4a90e2;
            box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
        }
        
        .qr-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
            margin-top: 10px;
        }
        
        .qr-option {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }
        
        .qr-option label {
            font-size: 14px;
            color: #333;
        }
        
        .qr-button {
            background: linear-gradient(135deg, #4a90e2, #357abd);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s ease;
            margin-top: 10px;
        }
        
        .qr-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(74, 144, 226, 0.3);
        }
        
        .qr-result {
            margin-top: 30px;
            text-align: center;
            display: none;
        }
        
        .qr-code {
            max-width: 250px;
            margin: 20px auto;
            padding: 15px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .qr-download {
            display: inline-block;
            background: #4a90e2;
            color: white;
            padding: 10px 20px;
            border-radius: 5px;
            text-decoration: none;
            margin-top: 15px;
            transition: all 0.3s ease;
        }
        
        .qr-download:hover {
            background: #357abd;
        }
        
        .qr-error {
            color: #e74c3c;
            margin-top: 15px;
            padding: 10px;
            background: rgba(231, 76, 60, 0.1);
            border-radius: 5px;
            display: none;
        }
        
        .debug-log {
            margin-top: 20px;
            padding: 15px;
            background: #f8f9fa;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-family: monospace;
            font-size: 14px;
            white-space: pre-wrap;
            word-break: break-all;
            display: none;
        }
        
        .footer {
            text-align: center;
            margin-top: 30px;
            font-size: 14px;
            color: #777;
        }
        
        @media (max-width: 768px) {
            .qr-container {
                margin: 20px;
                padding: 20px;
            }
        }