styles.css

/* CSS from Github-flavoured Markdown */

@font-face {
  font-family: octicons-anchor;
  src: url(data:font/woff;charset=utf-8;base64,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)
    format("woff");
}

body {
  -ms-text-size-adjust: auto;
  -webkit-text-size-adjust: auto;
  -moz-text-size-adjust: auto;
  color: #333;
  /* overflow: hidden; */
  font-family: "Helvetica Neue", Helvetica, "Segoe UI", Arial, freesans,
    sans-serif;
  word-wrap: break-word;
}

strong {
  font-weight: bold;
}

h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

img {
  border: 0;
}

hr {
  box-sizing: content-box;
  height: 0;
}

pre {
  overflow: auto;
  margin: 0; /* <- */
}

code,
kbd,
pre {
  font-family: monospace, monospace;
  font-size: 1em;
}

input {
  color: inherit;
  font: inherit;
  margin: 0;
}

html input[disabled] {
  cursor: default;
}

input {
  line-height: normal;
}

input[type="checkbox"] {
  box-sizing: border-box;
  padding: 0;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

td,
th {
  padding: 0;
}

* {
  box-sizing: border-box;
}

input {
  font: 13px/1.4 Helvetica, arial, nimbussansl, liberationsans, freesans, clean,
    sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
}

hr {
  height: 0;
  margin: 15px 0;
  overflow: hidden;
  background: transparent;
  border: 0;
  border-bottom: 1px solid #ddd;
}

hr:before {
  display: table;
  content: "";
}

hr:after {
  display: table;
  clear: both;
  content: "";
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 15px;
  margin-bottom: 15px;
  line-height: 1.1;
}

h1 {
  font-size: 1.875rem;
}

h2 {
  font-size: 1.3125rem;
}

h3 {
  font-size: 1rem;
}

h4 {
  font-size: 0.875rem;
}

h5 {
  font-size: 0.75rem;
}

h6 {
  font-size: 0.7rem;
}

blockquote {
  margin: 0;
}

ul,
ol {
  /* padding: 0; */
  margin-top: 0;
  margin-bottom: 0;
}

ol ol,
ul ol {
  list-style-type: lower-roman;
}

ul ul ol,
ul ol ol,
ol ul ol,
ol ol ol {
  list-style-type: lower-alpha;
}

dd {
  margin-left: 0;
}

code {
  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
  font-size: 12px;
}

pre {
  margin-top: 0;
  margin-bottom: 0;
  font: 12px Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

.octicon {
  font: normal normal normal 16px/1 octicons-anchor;
  display: inline-block;
  text-decoration: none;
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.octicon-link:before {
  content: "\f05c";
}

a:not(:link):not(:visited) {
  color: inherit;
  text-decoration: none;
}

.anchor {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  padding-right: 6px;
  padding-left: 30px;
  margin-left: -30px;
}

.anchor:focus {
  outline: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  position: relative;
  margin-top: 1em;
  margin-bottom: 16px;
  font-weight: bold;
  line-height: 1.4;
}

h1 .octicon-link,
h2 .octicon-link,
h3 .octicon-link,
h4 .octicon-link,
h5 .octicon-link,
h6 .octicon-link {
  display: none;
  color: #000;
  vertical-align: middle;
}

h1:hover .anchor,
h2:hover .anchor,
h3:hover .anchor,
h4:hover .anchor,
h5:hover .anchor,
h6:hover .anchor {
  padding-left: 8px;
  margin-left: -30px;
  text-decoration: none;
}

h1:hover .anchor .octicon-link,
h2:hover .anchor .octicon-link,
h3:hover .anchor .octicon-link,
h4:hover .anchor .octicon-link,
h5:hover .anchor .octicon-link,
h6:hover .anchor .octicon-link {
  display: inline-block;
}

h1 {
  padding-bottom: 0.3em;
  font-size: 2.25em;
  line-height: 1.2;
  border-bottom: 1px solid #eee;
}

h1 .anchor {
  line-height: 1;
}

h2 {
  padding-bottom: 0.3em;
  font-size: 1.75em;
  line-height: 1.225;
  border-bottom: 1px solid #eee;
}

h2 .anchor {
  line-height: 1;
}

h3 {
  font-size: 1.5em;
  line-height: 1.43;
}

h3 .anchor {
  line-height: 1.2;
}

h4 {
  font-size: 1.25em;
}

h4 .anchor {
  line-height: 1.2;
}

h5 {
  font-size: 1em;
}

h5 .anchor {
  line-height: 1.1;
}

h6 {
  font-size: 1em;
  color: #777;
}

h6 .anchor {
  line-height: 1.1;
}

p,
blockquote,
ul,
ol,
dl,
table,
pre {
  margin-top: 0;
  margin-bottom: 16px;
}

hr {
  height: 4px;
  padding: 0;
  margin: 16px 0;
  background-color: #e7e7e7;
  border: 0 none;
}

ul ul,
ul ol,
ol ol,
ol ul {
  margin-top: 0;
  margin-bottom: 0;
}

li > p {
  margin-top: 16px;
}

dl {
  padding: 0;
}

dl dt {
  padding: 0;
  margin-top: 16px;
  font-size: 1em;
  font-style: italic;
  font-weight: bold;
}

dl dd {
  padding: 0 16px;
  margin-bottom: 16px;
}

blockquote {
  padding: 0 15px;
  color: #777;
  border-left: 4px solid #ddd;
}

blockquote > :first-child {
  margin-top: 0;
}

blockquote > :last-child {
  margin-bottom: 0;
}

table {
  display: block;
  width: 100%;
  overflow: auto;
  word-break: normal;
  word-break: keep-all;
}

table th {
  font-weight: bold;
}

table th,
table td {
  padding: 6px 13px;
  border: 1px solid #ddd;
}

table tr {
  background-color: #fff;
  border-top: 1px solid #ccc;
}

table tr:nth-child(2n) {
  background-color: #f8f8f8;
}

img {
  max-width: 100%;
  box-sizing: border-box;
}

code {
  padding: 0;
  padding-top: 0.2em;
  padding-bottom: 0.2em;
  margin: 0;
  font-size: 85%;
  background-color: rgba(0, 0, 0, 0.04);
  border-radius: 3px;
}

code:before,
code:after {
  letter-spacing: -0.2em;
  content: "\00a0";
}

pre > code {
  padding: 0;
  margin: 0;
  font-size: 100%;
  word-break: normal;
  white-space: pre;
  background: transparent;
  border: 0;
}

.highlight {
  margin-bottom: 16px;
}

.highlight pre,
pre {
  padding: 16px;
  overflow: auto;
  font-size: 85%;
  line-height: 1.45;
  background-color: #f7f7f7;
  border-radius: 3px;
}

.highlight pre {
  margin-bottom: 0;
  word-break: normal;
}

pre {
  word-wrap: normal;
}

pre code {
  display: inline;
  max-width: initial;
  padding: 0;
  margin: 0;
  overflow: initial;
  line-height: inherit;
  word-wrap: normal;
  background-color: transparent;
  border: 0;
}

pre code:before,
pre code:after {
  content: normal;
}

kbd {
  display: inline-block;
  padding: 3px 5px;
  font-size: 11px;
  line-height: 10px;
  color: #555;
  vertical-align: middle;
  background-color: #fcfcfc;
  border: solid 1px #ccc;
  border-bottom-color: #bbb;
  border-radius: 3px;
  box-shadow: inset 0 -1px 0 #bbb;
}

.task-list-item {
  list-style-type: none;
}

.task-list-item + .task-list-item {
  margin-top: 3px;
}

.task-list-item input {
  margin: 0 0.35em 0.25em -1.6em;
  vertical-align: middle;
}

/* Better defaults */

main,
header {
  margin: 0 auto;
  max-width: 92ch;
}

h1 {
  margin-top: 3rem;
}

h2 {
  margin-top: 2rem;
}

h3 {
  margin-top: 1.5rem;
}

p,
li {
  max-width: 80ch;
}

/* Project specific styles */

body {
  padding: 1rem;
  padding-bottom: 2rem;
  line-height: 1.5;
}
@media screen and (max-width: 55rem) {
  body {
    padding: 0.5rem;
  }
}

a {
  color: #0070f0;
}

a[href] {
  text-decoration: none;
  box-shadow: 0 1.5px 0 0 currentColor;
}

main a[href] {
  font-weight: 500;
}

a[href]:hover {
  text-decoration: none;
  color: #23828b;
}

a[href]:focus {
  box-shadow: none;
  outline: 3px solid currentColor;
  outline-offset: 0.16rem;
}

figure {
  margin: 1rem;
}

details > summary > h2,
details > summary > h3,
details > summary > h4,
details > summary > h5,
details > summary > h6 {
  display: inline;
}

.header_and_permalink > h2,
.header_and_permalink > h3,
.header_and_permalink > h4,
.header_and_permalink > h5,
.header_and_permalink > h6 {
  display: inline-block;
}

.header_and_permalink > a {
  opacity: 0;
  margin-left: 0.25rem;
  font-size: 1.25rem;
}
.header_and_permalink:hover > a,
.header_and_permalink:focus-within > a {
  opacity: 1;
}

.page_section {
  margin-top: 3rem;
  border-top: 1px solid black;
}

ul.guidelines {
  list-style: none;
  padding-left: 1.5rem;
}
@media screen and (max-width: 55rem) {
  ul.guidelines {
    padding-left: 0rem;
  }
}
ul.badges {
  padding: 0;
  display: inline-block;
  margin-top: 0.3rem;
  -webkit-print-color-adjust: exact;
}
ul.badges > * {
  margin-left: 0.1rem;
}

li.guideline {
  margin: 1.4rem 0;
}

li.guideline > a {
  font-size: 1.2em;
  margin-right: 0.2rem;
}

li.badge,
span.badge {
  display: inline-block;
  padding: 0.25em 0.4em;
  font-size: 0.875rem;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: baseline;
  border-radius: 0.25rem;
}
.badge--design {
  color: #000;
  background-color: #ffc9f8;
}
.badge--content {
  color: #000;
  background-color: #bdf298;
}
.badge--code {
  color: #000;
  background-color: #a2eeef;
}

details > *:not(:first-child) {
  margin-left: 1rem;
}

.common_mistakes_list {
  list-style: none;
  padding-left: 0;
}
.common_mistakes_list > li + li {
  margin-top: 2rem;
}

.video_container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
}

.video_container > iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Utility classes */

.\!visually-hidden:not(:focus):not(:active) {
  clip: rect(0 0 0 0);
  clip-path: inset(100%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.\!font-weight-400 {
  font-weight: 400 !important;
}