#glass {
    position: absolute;
    border-radius: 50%;
    box-shadow: 0 0 0 7px rgba(255, 255, 255, 0.85), 0 0 7px 7px rgba(0, 0, 0, 0.25), inset 0 0 40px 2px rgba(0, 0, 0, 0.25);
    display: none;
    background-repeat: no-repeat;
    background-color: rgba(0, 0, 0, .6);
}

.htmleaf-content img {
    display: block;
    margin: 20px auto;
}

.center {
    text-align: center;
}