dlibrary/dlibrary/static/viewer.css

html, body {
    height: 100%;
    width: 100%;
    padding: 0;
    margin: 0;
}

#controls {
    opacity: 0.8;
    animation: 2s linear forwards fade;
    position: relative;
    z-index: 300;
}

@keyframes fade {
    to { opacity: 0; }
}

.tap {
    background: #000000;
    position: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
}

#tap-left, #tap-right {
    bottom: 0px;
    width: 30vw;
    height: 100vh;
}

#tap-left svg, #tap-right svg {
    width: min(90%, 100px);
}

#tap-left {
    left: 0px;
}

#tap-right {
    right: 0px;
}

#tap-back, #tap-restart {
    left: 30vw;
    width: 40vw;
    height: 20vh;
}

#tap-back svg {
    height: min(51%, 100px);
}

#tap-restart svg {
    height: min(90%, 175px);
}

#tap-back {
    top: 0px;
}

#tap-restart {
    bottom: 0px;
}

.image-container img {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: 100vw;
    object-fit: contain;
    object-position: 50% 50%;
    background-color: #111;
}

#current-image img {
    z-index: 100;
}

#preload-images img {
    z-index: 0;
}

#page-num, #duration {
    position: fixed;
    z-index: 200;
    font-size: 14pt;
    top: 10px;
    font-weight: bold;
    opacity: 0.75;
    text-shadow: /* Duplicate the same shadow to make it very strong */
        0 0 2px #222,
        0 0 2px #222,
        0 0 2px #222;
}

#page-num {
    left: 10px;
    text-align: center;
}

#page-num table {
    border-spacing: 0;
}

#current-page {
    border-bottom: 2px solid;
}

#duration {
    right: 10px;
}

#progress {
    background-color: #4488ffcc;
    height: 5px;
    width: 0;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 400;
}