source: public/css/custom.css@ 98fbfa4

body {
    padding: 1em;
}

article {
    max-width: calc(80ch + 4em);
    border-radius: 0.em;
    margin: 0 var(--universal-padding);
    padding: 1em;
    background: #fefefe;
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
    position: relative;
}

article h1:first-child,
article h2:first-child,
article h3:first-child,
article h4:first-child,
article h5:first-child,
article h6:first-child {
    margin-top: 0;
    padding: 0;
}

.navbar {
    background: #fefefe;
    border: 0;
}

.navbar .button {
    background: #fefefe;
    text-transform: none;
}

/* 16:9 */
.video {
    padding-top: 56.25%;
    position: relative;
    width: calc(100% - 1em);
}

iframe {
    width: 100%;
    height: 100%;
    position:  absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

.cover {
    margin: 0.5em 0;
    border: 1px solid rgba(0,0,0,.3);
    border-radius: 0.1em;
}

#youmu {
    position: relative;
    top: 1em;
    margin-bottom: -0.5em;
    max-width: 400px;
    filter: drop-shadow(0 12px 4px rgba(0,0,0,.25));
}

#preamble {
    margin: var(--universal-margin);
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
}

#postamble {
    margin: var(--universal-margin);
    max-width: calc(80ch + 6em);
}

hr {
    background: rgba(0,0,0,.05) !important;
    height: 0.5rem !important;
    margin: 1px !important;
}

#table-of-contents {
    z-index: 1050;
    font-size: 9pt;
    position: fixed;
    right: calc(var(--universal-margin) + 0.5em);
    top: 79px;
    background: #fefefe;
    line-height: 12pt;
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
    max-height: 80%;
    overflow: auto;
}

#table-of-contents * {
    padding: none;
}

#table-of-contents h2 {
    font-size: 13pt;
    border: 0;
    font-weight: 400;
    padding: .05em .5em;
}

#text-table-of-contents ul {
    margin: 0 1em;
}

#text-table-of-contents ul li {
    font-size: 11pt;
    width: 100%;
}

#table-of-contents #text-table-of-contents {
    display: none;
    text-align: left;
}

#table-of-contents:hover #text-table-of-contents {
    display:block;
    padding: none;
    margin: 0;
    padding: 0;
}

#table-of-contents li {
    clear:both
}

.licenses {
    margin-top: 0.75em !important;
}

.licenses a:not(:first-child) {
    margin-left: 0.5em;
}

.inline li {
    display: inline-flex;
}