style.css

/*
    place extra stylesheet here
*/

body, html {
    margin: 0px;
    padding: 0px;
    overflow: hidden;
    font-family: "Product Sans", "Liberation Sans", Arial, sans-serif;
}

#documentMetadata,
#documentTitle {
    display: none;
}

.Page {
    position: absolute;
    left: 230px;
    top: 0px;
    right: 0px;
    bottom: 0px;
    
    display: flex;
    align-items: center;
    justify-content: center;
    background: #00000077;
}
.Page:not(:target) {
    display: none;
}

.Page > h2 {
    display: none;
}
.Page .ImageContainer {
    box-shadow: 0px 0px 1em #00000077;
}

.Page .ImageContainer {
    position: relative;
}
.Page .ImageContainer > .Links > a {
    position: absolute;
    background-color: transparent;
    transition: background-color 0.2s ease;
}
body.Active .Page .ImageContainer > .Links > a {
    background-color: #E79A0F11;
}
.Page .ImageContainer > .Links > a:hover {
    background-color: #FFFFFF55 !important;
}

.TOC {
    position: absolute;
    top: 0px;
    left: 0px;
    bottom: 0px;
    width: 230px;
    display: flex;
    flex-direction: column;
    
    overflow-y: auto;
    overflow-x: visible;
    z-index: 2;
    background: #444;
}
.TOC > div {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1em;
    background: transparent;
    transition: background 0.2s ease;
}
.TOC > div.Focused {
    background: #5294E2;
}
.TOC > div:not(.Focused):hover {
    background: #5294E266;
}
.TOC > div + div {
    margin-top: 1em;
}

.TOC > div > a {
    display: block;
    border: solid 2px #FFF;
    box-shadow: 0px 0px 5px #000;
}

.TOC > div > strong {
    display: block;
    text-align: center;
    color: #FFF;
    font-weight: normal;
    margin-top: 0.3em;
}