:root {
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;

  --foreground-color: #000000;
  --background-color: #ffffff;
  --link-color: #0000ee;
  --link-visited-color: #751acb;
  --link-active-color: #ff0000;
  --link-hover-background-color: #ffe590;
  --border-dark-color: #444444;
  --border-color: #888888;
  --border-light-color: #bbbbbb;
  --table-p1-color: #fafafa;
  --table-p2-color: #f4f4f4;
  --table-p3-color: #e8e8e8;
  --code-inline-color: #101010;

  --component-main: #fcc04f;
  --component-accent: #13c136;
  --component-warning: #fc8080;
}

[data-theme="dark"] {
  color-scheme: dark;
  --foreground-color: #dfdfdf;
  --background-color: #202020;
  --link-color: #dfdf2c;
  --link-visited-color: #9fcb76;
  --link-active-color: #df2020;
  --link-hover-background-color: #525252;
  --border-dark-color: #acacac;
  --border-color: #797979;
  --border-light-color: #525252;
  --table-p1-color: #2b2b2b;
  --table-p2-color: #323232;
  --table-p3-color: #383838;
  --code-inline-color: #f8f8f8;

  --component-main: #d88000;
  --component-accent: #008f1d;
  --component-warning: #dd3939;
}

[data-theme="dark"] img:not(.staySameInDark),
[data-theme="dark"] h1::after {
  filter: invert(0.8745);
}

html {
  scroll-padding-top: 1rem;

  /*
  TODO: Change `overflow-y` below to `scrollbar-gutter: stable both-edges;` or equivalents in future. When this comment was written, the gradients couldn't fill the blank region made for scrollbar.
  */
  overflow-y: scroll;

  --c1: var(--table-p3-color);
  --c2: var(--background-color);
  --l1: 5em;
  --l2: 10em;
  background:
    repeating-linear-gradient(110deg,
      var(--c1) 0 var(--l1),
      var(--c2) var(--l1) var(--l2)) 0 0 / 100% 100% no-repeat;
}

@media (forced-colors: active) {

  html,
  .custom-container {
    scrollbar-color: auto;
  }
}

body {
  box-sizing: border-box;
  min-height: 100dvh;
  max-width: calc(max(704px, 44em));
  margin: auto;
  padding: calc(max(32px, 2em)) calc(max(8px, 0.5em));
  color: var(--foreground-color);
  font-family: var(--font-sans);
  background-color: var(--background-color);
  outline: 2em solid var(--background-color);
  line-height: 1.6;
}

code,
pre,
kbd,
samp {
  font-family: var(--font-mono);
}


p {
  margin: 1em 0;
}

img {
  max-width: 100%;
  vertical-align: middle;
}

video {
  max-width: 100%;
}

summary {
  cursor: pointer;
}

details {
  margin: 0.5em 0;
}

details > .indent {
  margin-left: 1em;
}

.toc-filler {
  visibility: hidden;
  pointer-events: none;
  user-select: none;
}

kbd {
  --b1: calc(max(1px, 0.0625em));
  --b2: calc(max(2px, 0.125em));

  display: inline-block;
  min-width: 0.75em;
  text-align: center;

  font-size: 0.75em;
  font-family: inherit;
  border-style: outset;
  border-width: var(--b1) var(--b2) var(--b2) var(--b1);
  border-radius: var(--b2);
  border-color: var(--border-light-color);
  padding: var(--b2) calc(max(4px, 0.25em));
  margin: var(--b2);

  background: var(--background-color);
}

a {
  text-decoration: none;
}

a:hover {
  background-color: var(--link-hover-background-color);
}

:link {
  color: var(--link-color);
}

:visited {
  color: var(--link-visited-color);
}

:link:active,
:visited:active {
  color: var(--link-active-color);
}

:link > *,
:visited > *,
:link:active > *,
:visited:active > * {
  color: revert;
}

.is-targeted > a:is(:link, :visited, :link:active, :visited:active) {
  outline: calc(max(4px, 0.25em)) double var(--border-color);
  outline-offset: 0.125rem;
}

.header-anchor:hover {
  color: var(--link-color);
}

:is(h1, h2, h3, h4, h5, h6, dt) > :is(a:link, a:visited, a:link:active, a:visited:active) {
  color: var(--foreground-color);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: normal;
}

h1 {
  font-size: 2em;
  vertical-align: middle;
}

h1::after {
  --side: 8rem;
  display: inline-block;
  background-image: url('../favicon/favicon.svg');
  content: "";
  vertical-align: middle;
  background-size: var(--side) var(--side);
  width: var(--side);
  height: var(--side);
  margin-left: 1em;
}

/* Grouped headings for consistent asymmetrical margins */
h2,
h3,
h4,
h5,
h6 {
  margin-top: 1em;
  margin-bottom: 0.5em;
}

h2 {
  font-size: 1.5em;
  border-bottom: calc(max(1px, 0.0625em)) solid var(--border-dark-color);
  padding-bottom: 0.125em;
}

h3 {
  font-size: 1.31em;
  text-decoration: dashed underline calc(max(1px, 0.0625em)) var(--border-color);
  text-underline-position: under;
}

h4 {
  font-size: 1.15em;
}

h5 {
  font-size: 1em;
}

h6 {
  font-size: 0.875em;
}

table {
  --b1: calc(max(1px, 0.0625em));
  border-spacing: 0;
  border-collapse: separate;
  border-left: var(--b1) solid var(--border-color);
  border-right: var(--b1) solid var(--border-color);
  border-top: var(--b1) solid var(--border-color);
  border-bottom: hidden;
}

tr:nth-child(3n+1) {
  background: var(--background-color);
}

tr:nth-child(3n+2) {
  background: var(--table-p1-color);
}

tr:nth-child(3n+3) {
  background: var(--table-p2-color);
}

th {
  height: 2em;
  padding: calc(max(4px, 0.25em)) 1em;
  background: var(--background-color);
  border-bottom: calc(max(1px, 0.0625em)) dashed var(--border-color);
}

th:not(:first-child) {
  border-left: calc(max(1px, 0.0625em)) solid var(--border-color);
}

td {
  height: 1.5em;
  padding: calc(max(4px, 0.25em)) 1em;
  border-bottom: calc(max(1px, 0.0625em)) solid var(--border-color);
}

td:not(:first-child) {
  border-left: calc(max(1px, 0.0625em)) solid var(--border-color);
}

.custom-dl .dl-row {
  display: grid;
  grid-template-columns: 1fr 3fr;
  margin-bottom: 0;
  align-items: center;

  border: calc(max(1px, 0.0625em)) solid var(--border-color);
  border-bottom: 0;
}

.custom-dl .dl-row:last-child {
  border-bottom: calc(max(1px, 0.0625em)) solid var(--border-color);
}

.custom-dl .dl-row:nth-child(3n+1) {
  background: var(--background-color);
  /* border: calc(max(1px, 0.0625em)) solid var(--table-p1-color); */
}

.custom-dl .dl-row:nth-child(3n+2) {
  background: var(--table-p1-color);
}

.custom-dl .dl-row:nth-child(3n+3) {
  background: var(--table-p2-color);
}

dd {
  margin-left: 0;
  padding-left: 1em;
}

dt {
  width: 100%;
}

.custom-dl .dt-column,
.custom-dl .dd-content {
  margin-top: 0.125em;
  margin-bottom: 0.125em;
}

.custom-dl .dd-column {
  padding-left: 0.25em;
  grid-column: 2;
}

.custom-dl .dt-column {
  margin-left: 0.25em;
  grid-column: 1;
}

.custom-dl .dd-content > * {
  margin-top: 0.25em;
  margin-bottom: 0.25em;
}

.custom-dl .dt-column:first-of-type {
  margin-top: 0;
}

.custom-dl .dd-content > *:first-child {
  margin-top: 0;
}

.custom-dl .dd-content > *:last-child {
  margin-bottom: 0;
}

audio {
  margin-left: 0.25em;
  margin-right: 0.25em;
  vertical-align: middle;
}

label {
  vertical-align: middle;
}

code {
  white-space: pre-wrap;
}

:not(pre) > code {
  margin-left: 0.25em;
  margin-right: 0.25em;
  color: var(--code-inline-color);
}

div.highlight {
  overflow: auto;
  margin: 1em 0;
  /* padding: 0.75em 0.5em; */
  /* outline: calc(max(1px, 0.0625em)) solid var(--border-color); */
}

div.highlight pre {
  border: none;
  padding: 0;
  margin: 0;
  overflow: visible;
}

ul {
  padding-left: 1em;
}

li {
  margin: 0.125em 0;
}

summary:hover {
  background-color: var(--table-p2-color);
}

header {
  border-bottom: calc(max(1px, 0.0625em)) var(--border-color) solid;
  padding: 0.5em 0;
  margin-bottom: 1em;
}

.grid-a {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
}

.grid-a > .nav-group {
  display: flex;
  align-items: center;
  gap: 1em;
  margin: 0;
}

.nav-group > .nav-link {
  margin: 0;
  line-height: 1;
  display: block;
}

.nav-group > .nav-language-selector {
  margin: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5em;
}

.lang-item {
  display: inline-block;
  justify-content: center;
  box-sizing: border-box;
  line-height: 1;

  text-align: center;
  padding: 0.25em 0.5em;
  font-size: 0.875em;
  text-decoration: none;

  color: var(--foreground-color);
  background-color: var(--background-color);
  border-color: var(--background-color);
  border-width: calc(max(4px, 0.25em));
  border-style: outset;
  cursor: pointer;
}

[data-theme="dark"] .lang-item {
  border-color: var(--border-dark-color);
}

a.lang-item:hover {
  border-style: groove;
  background-color: var(--link-hover-background-color);
  color: var(--foreground-color);
}

a.lang-item:active {
  border-style: inset;
}

span.lang-item.is-active {
  border-style: inset;
  background-color: var(--table-p2-color);
  cursor: default;
}

.grid-a > button {
  margin: 0;
}

.grid-a > .meta-dates {
  display: flex;
  flex-wrap: wrap;
  gap: 1em;
  text-align: left;
  margin: 0;
}

.meta-dates > p {
  margin: 0;
  line-height: 1;
}

footer {
  border-top: calc(max(1px, 0.0625em)) var(--border-color) solid;
  padding: 0.5em 0;
  margin-top: 1em;
}

button {
  background-color: var(--background-color);
  color: var(--foreground-color);
  border-color: var(--background-color);
  border-width: calc(max(4px, 0.25em));
  border-style: outset;
  padding: 0.25em 1em;
  font-family: inherit;
  font-size: 0.875em;
  vertical-align: middle;
  cursor: pointer;
  line-height: 1;
}

[data-theme="dark"] button {
  border-color: var(--border-dark-color);
}

button:hover {
  border-style: groove;
  outline: none;
}

button:active {
  border-style: inset;
}

/* .fallback, .mac-only, and .pc-only are used to switch OS specific text. For example, ⌘ and Ctrl. */
.fallback {
  display: inline;
}

.mac-only,
.pc-only {
  display: none;
}

.is-mac .fallback,
.is-mac .pc-only {
  display: none;
}

.is-mac .mac-only {
  display: inline;
}

.is-pc .fallback,
.is-pc .mac-only {
  display: none;
}

.is-pc .pc-only {
  display: inline;
}

/*
Firefox specific fix. Heights may change depending on the `lang` attribute.
If the layout is breaking, try adding more tags, including `::before` and `::after`.
*/
li::marker,
summary::marker {
  line-height: 1;
}


/* Screen reader specifics. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}