#qrcode-overlay {
    position: absolute;
    margin: auto;
    background-color: rgba(0, 136, 229, 1);
    display: none;
    z-index: 2;
    width:100%;
    height:200px;
}

.overlay-text {
    position: absolute;
    top: 50%;
    left: 50%;
    width:100%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    text-align: center;
}

.overlay-text:hover {
    text-decoration: underline;
}

.loading {
    display: inline-block;
    margin: auto;
    width:100%;
    height:200px;
    background-image: url(../image/loading.gif);
    background-repeat: no-repeat;
    background-position: center;
}