.scanner-container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

@media (max-width: 576px) {
    .scanner-container {
        max-width: 90vw;
    }

    .modal-dialog {
        margin: 0;
    }

    .modal-content {
        border-radius: 0;
    }
}