#preview video {
    min-width: 100vw;
    min-height: 100vh;
    width: auto !important;
}
#preview {
    overflow: hidden;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: black;
}

.close-camera {
    position: absolute;
    top: 20px;
    right: 20px;
}

.alert-wrapper {
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: 10px;
}

#qrcode-pic img {
    max-width: 100%;
}