/* General Styles */
        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #6a11cb, #2575fc);
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            margin: 0;
            color: #333;
            padding: 20px;
            box-sizing: border-box;
        }

        .container {
            background: #fffffff1;
            padding: 20px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            text-align: center;
            width: 100%;
            max-width: 400px;
        }

        h1 {
            font-size: 24px;
            margin-bottom: 20px;
            color: #333;
        }

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

        label {
            display: block;
            font-size: 14px;
            margin-bottom: 5px;
            color: #555;
        }

        input[type="text"], input[type="color"], input[type="range"], input[type="file"] {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.3s ease;
            box-sizing: border-box;
        }

        input[type="text"]:focus, input[type="color"]:focus, input[type="range"]:focus, input[type="file"]:focus {
            border-color: #6a11cb;
            outline: none;
        }

        input[type="color"] {
            height: 45px;
            padding: 5px;
        }

        input[type="range"] {
            -webkit-appearance: none;
            appearance: none;
            background: #ddd;
            height: 6px;
            border-radius: 5px;
            width: 100%;
        }

        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            background: #6a11cb;
            border-radius: 50%;
            cursor: pointer;
        }

        button {
            padding: 12px 25px;
            background: #6a11cb;
            color: #fff;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            cursor: pointer;
            transition: background 0.3s ease;
            width: 100%;
            box-sizing: border-box;
        }

        button:hover {
            background: #2575fc;
        }

        #qrcode {
            margin: 20px 0;
            display: flex;
            justify-content: center;
            position: relative;
        }

        #qrcode img {
            max-width: 100%;
            height: auto;
        }

        #logo-overlay {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            pointer-events: none;
        }

        #download-btn {
            margin-top: 20px;
            display: none;
        }

        .size-value {
            font-size: 14px;
            margin-left: 10px;
            color: #555;
        }

        /* Responsive Design */
        @media (max-width: 480px) {
            h1 {
                font-size: 20px;
            }

            .container {
                padding: 15px;
            }

            .form-group {
                margin-bottom: 15px;
            }

            input[type="text"], input[type="color"], input[type="range"], input[type="file"] {
                padding: 8px;
                font-size: 12px;
            }

            button {
                padding: 10px 20px;
                font-size: 12px;
            }

            .size-value {
                font-size: 12px;
            }
        }