body {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
}

video {
    width: 100%;
    max-width: 600px;
    border: 2px solid #333;
    border-radius: 8px;
    margin-bottom: 20px;
    /* height: 200px; */
}

.hidden {
    display: none;
}

#barcode-info {
    font-size: 1.5em;
    color: #333;
    text-align: center;
    margin-top: 10px;
}

#start-button, #stop-button {
    margin-top: 20px;
    margin-bottom: 20px;
    padding: 10px 20px;
    font-size: 1em;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#stop-button {
    background-color: #f44336;
    display: none;
}