body{
    /* background-image: linear-gradient(to top, #ffffff, #989898); */
    height: calc(100vh - 120px);
    padding: 50px 10px;
}
#reader {
    width: 640px;
    min-height: 350px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 2px 5px 10px rgba(0,0,0,0.1);

}

@media(max-width: 600px) {
    #reader {
        width: 100%;
    }
}

.empty {
    display: block;
    width: 100%;
    height: 20px;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-radius: 4px;
}

.alert-info {
    color: #31708f;
    background-color: #d9edf7;
    border-color: #bce8f1;
}

.alert-success {
    color: #3c763d;
    background-color: #dff0d8;
    border-color: #d6e9c6;
}
#reader button{
    background-color: #3fda86;
    padding: 10px 15px;
    border-radius: 6px;
    border: none;
}
#reader #html5-qrcode-anchor-scan-type-change{
    position: relative;
    top: 15px;
    text-decoration: none !important;
    background-color: #3fda86;
    padding: 10px 15px;
    border-radius: 6px;
    margin-bottom: 50px;
    color: #fff;
}
#closeBtn{
    display: inline-block;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px 15px;
    font-size: 18px;
    background-color: #3fda86;
    border: none;
    cursor: pointer;
}