#btn-scan-qr {
    cursor: pointer;
}

#reader {
    width:100%;
    margin-bottom: 20px;
}

#video-frame {
    position: relative;
}

#close-button {
    position: absolute;
    top:10px;
    right:10px;
    display: none;
    border-radius: 50%;
    -webkit-border-radius: 50%;
    padding:3px 10px;
    background-color: rgba(255,255,255,.75);
    border:none;
    font-size:2rem;
}