main {
    text-align: center;
    margin: 50px auto;
    padding: 20px;
    background-color: rgb(241, 241, 241);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.215);
    width: 80%;
    max-width: 600px;
}

h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

label {
    font-weight: bold;
    display: block;
    margin-top: 10px;
}

input, select {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 15px;
    border-radius: 5px;
}

button:hover {
    background-color: #45a049;
}

#barcodeContainer {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

#barcodeImage {
    display: none;
    margin-top: 10px;
    max-width: 100%;
}

#downloadBtn {
    background-color: #0056b3;
}