#qr-container {
            background-color: #F7F7F7;
            border-radius: 0.4rem;
            box-shadow: 0px 4px 15px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(0, 0, 0, .2);
            padding: 8px;
            max-width: 360px;
            width: 90%;
            color: #000000;
            text-align: center;
        }
        #qr-container h2 {
            font-size: 1.4rem;
            margin-bottom: 5px;
            margin-top: 5px;
        }
        #qr-container textarea,
        #qr-container input,
        #qr-container select {
            width: 100%;
            padding: 8px;
            margin: 5px 0;
            border-radius: 0.4rem;
            border: 1px solid #ccc;
            box-sizing: border-box;
            outline: none;
        }
        textarea#text-input {
            height: 6rem;
        }
        #qr-container button {
            width: 100%;
            padding: 10px;
            background-color: #28a745;
            color: white;
            border: none;
            border-radius: 0.4rem;
            cursor: pointer;
            font-size: 1rem;
            margin-top: 10px;
            transition: background-color 0.3s ease;
        }
        #qr-container button:hover {
            background-color: #218838;
        }
        #qr-preview {
            margin-top: 20px;
            display: none;
        }
        #qr-preview canvas {
            margin: 0 auto;
            display: block;
            border-radius: 0.4rem;
            padding: 10px;
            background-color: #f9f9f9;
            border: 1px solid rgba(0, 0, 0, .2);
            box-shadow: 0px 3px 10px rgba(0, 0, 0, 0.1);
        }
        #color-picker {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 10px;
        }
        #color-picker label {
            flex-grow: 1;
            font-size: 0.9rem;
        }
        #color-picker input {
            width: auto;
            cursor: pointer;
        }
        #qr-preview button {
            margin-top: 8px;
            background-color: #007bff;
            padding: 10px 0;
            border-radius: 0.4rem;
            border: none;
            color: white;
            cursor: pointer;
        }
        #qr-preview button:hover {
            background-color: #0056b3;
        }
        @media screen and (max-width: 480px) {
            #qr-container {
                padding: 15px;
            }
            #qr-container h2 {
                font-size: 1.2rem;
            }
            #qr-container button {
                font-size: 0.9rem;
            }
        }