html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.scanner {
    position: absolute;
    inset: 0;
    z-index: 9;
}

#qrcancel {
    position: absolute;
    z-index: 10;
    top: 10px;
    right: 10px;
}