.qrscanner video {
    height: 300px;
    max-width: 100%;
    max-height: 75%;
}

.row-element-set {
    display: flex;
    flex-direction: column;
}

.row-element {
    padding: .2em 0em;
}

.row-element-set-QRScanner {
    max-width: 30em;
    display: flex;
    flex-direction: column;
}

body {
    display: flex;
    justify-content: center;
}