styles.css

/* Reset */
html, body, div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em,
img, ins, kbd, q, samp, small, strike, strong, sub, sup, tt, var, dl, dt, dd, ol, ul, li, fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td { margin: 0; padding: 0; border: 0; outline: 0; vertical-align: baseline; background: transparent; }
table { border-spacing: 0; border-collapse: collapse; }
caption, th, td { text-align: left; font-weight: normal; }
blockquote, q { quotes: none; }
* { margin: 0; }

/* Type */
html {
    color: #24292e;
    font-family: -apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol;
    font-size: inherit;
    line-height: 1.6125;
}
h1, h2, h3, h4, h5, h6 {
    line-height: 1.25;
}
body {
    margin: 0;
}
h1 {
    font-size: 36px;
    margin: 0 0 20px;
}
h2 {
    margin: 0 0 15px;
}
h3 {
    margin: 0 0 10px;
    font-size: 18px;
}
a:link {
    color: #0366d6;
    text-decoration: none;
}
code {
    white-space: nowrap;
    display: none;
}
img {
    max-width: 100%;
}

/* Styles */
li {
    margin-left: 1.75em;
}
p, ul, table {
    margin: 0 0 20px;
}
.nestedul {
    margin-bottom: 0;
}
.nobr {
    white-space: nowrap;
}
table {
    width: 100%;
    border-top: 1px solid #ccc;
}
th, td {
    padding: 20px 20px 20px 0;
    border-bottom: 1px solid #ccc;
}
th {
    font-weight: bold;
    vertical-align: top;
}
thead th {
    font-size: 14px;
    padding: 5px 5px 5px 0;
}

/* Custom styles */


html,
body {
    height: 100%;
}

.content {
    position: relative; /* For .sidenav */
    min-height: 100%;
    display: flex;
}
main {
    box-sizing: border-box;
    margin-top: 30px;
    margin-right: auto;
    margin-left: auto;
    max-width: 800px;
    padding-right: 40px;
    padding-left: 40px;
    flex-grow: 999;
    flex-basis: 0;
}

/* Topnav */
.topnav {
    padding: 14px 20px;
    border-bottom: 1px solid hsl(0, 0%, 92%);
    color: inherit;
    display: flex;
    justify-content: center;
}
.logo {
    line-height: 1;
    font-weight: 600;
    color: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Sidenav */
.sidenav {
    flex-grow: 1;
    max-width: 200px;
    flex-basis: 20%;
    padding: 30px 20px 20px;
    background-color: #F8F5F5;
    border-right: 1px solid hsl(0, 0%, 92%);
}
.sidenav li {
    list-style: none;
    margin-left: 0;
    margin-bottom: 6px;
}
.sidenav li li {
    margin-left: 20px;
}
.sidenav ul ul li {
    margin-left: 20px;
}
.sidenav li a {
    text-decoration: none;
    color: inherit;
}
.sidenav li a:hover {
    text-decoration: underline;
}

.sidenav {
    position: absolute;
    transform: translateX(-100%);
}
.has-sidenav .sidenav {
    position: static;
    transform: translateX(0%);
}

/* Breadcrumb */
.breadcrumb {
    color: hsl(0, 0%, 34%, 0.7);
    margin-bottom: 10px;
}
.breadcrumb a {
    color: hsla(0, 0%, 34%);
    text-decoration: none;
}
.breadcrumb a:hover {
    text-decoration: underline;
}

/* syntax highlighting */
.xmlmarkup {
    white-space: pre;
}
.xmlmarkup, pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
pre.xmlmarkup {
    font-size: 14px;
}
div.xmlmarkup {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
.xmlmarkup a:link {
    text-decoration: none;
}
.xmlmarkup a:link:hover {
    text-decoration: underline;
}
pre.xmlmarkup:not(.boldtags) {
    display: block;
    line-height: inherit;
    color: #00ff59;
    border: 1px solid hsla(0, 0%, 0%, 0.15);
    border-radius: 6px;
    padding: 15px;
    background: #202020;
    overflow: auto;
}
.boldtags .tag {
    font-weight: bold;
    color: black !important
}
pre.xmlmarkup .quote,
pre.xmlmarkup .attrval {
    color: #72f0f3;
}
pre.xmlmarkup .bracket,
pre.xmlmarkup .slash,
pre.xmlmarkup .equals {
    color: #a0a0a0 !important;
}
pre.xmlmarkup .tag {
    color: #e2e2e2;
}
pre.xmlmarkup .tag,
pre.xmlmarkup .attr {
    color: #e2e2e2;
}
pre.xmlmarkup a:link {
    color: #e2e2e2;
}
pre.xmlmarkup a:hover {
    color: #f00 !important;
}
pre.xmlmarkup .attrname {
    color: #929eff;
}
pre.xmlmarkup .xmltxt {
    color: #00ff59;
}
pre.xmlmarkup .attr {
    color: #1ae695;
}
pre.xmlmarkup .comment {
    color: #a0a0a0;
}
div.xmlmarkup .tag {
    color: #5a5a5a;
}
div.xmlmarkup .attrval {
    color: #5a5a5a;
}
/* no dif */
.xmlmarkup .nodiff {
    color: #a0a0a0;
}
.xmlmarkup .nodiff .attrval {
    color: #a0a0a0;
}
/* diff */
.diff .tag {
    font-weight: bold;
}
.xmlmarkup .diff {
    color: #a0a0a0;
}
.xmlmarkup .diff .tag {
    color: rgb(0, 0, 0);
}
.xmlmarkup .diff .attrname {
    color: #d82c2c !important;
}
.xmlmarkup .diff .attrval {
    color: #0366d6;
    font-weight: bold;
}
.xmlmarkup .diff .xmltxt {
    color: #000000;
}
.xmlmarkup .nodiff .xmltxt {
    color: black;
}

/* Toggle */
.toggle {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    border: 0;
    background-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    color: inherit;
    opacity: 0.8;

    position: absolute;
    left: 20px;
}

@font-face {
    font-family: 'smufl';
    src: url('fonts/BravuraText.woff2') format('woff2'),
         url('fonts/BravuraText.woff') format('woff');
    font-weight: normal;
    font-style: normal;
}

.smufl {
    font: 40px smufl,sans-serif;
}

.w3c-logo {
    display: inline-flex;
    background: #1a5e9a;
    padding: 0.75em;
    border-radius: 0.4em;
    float: right;
}
.w3c-logo-homepage svg {
    width: 62px;
}

@media (max-width: 800px) {
    .w3c-logo {
        float: none;
        margin-bottom: 10px;
        padding: 0.5em;
    }
    .w3c-logo-homepage svg {
        width: 34px;
        height: 22px;
    }

    main {
        max-width: 100%;
    }

    .has-sidenav .sidenav {
        width: 50%;
        z-index: 1;
        position: absolute;
        transform: translateX(0%);
        min-height: 100%;
    }
}

/* Examples */
.reference-examples {
    max-width: 100%;
}
.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 30px;
    margin-top: 60px;
}
.examples-grid div a {
    display: flex;
    align-items: center;
    justify-content: start;
    width: 100%;
    height: 200px;
    display: flex;
    flex-direction: column;
    text-align: center;
}
.examples-grid div a img {
    min-width: 100px;
    height: 40%;
    object-fit: scale-down;
}
.examples-grid div a span {
    text-align: center;
    line-height: 20px;
    margin-bottom: 0em;
}
.examples-grid div a:hover span {
    text-decoration: underline;
}
.tutorials .tutorial-grid {
    display: grid;
    gap: 60px;
}
.tutorials .tutorial-grid div {
    margin-top: 30px;
}