@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;600&display=swap");

/* esmoe docs theme.
   The site's one visual idea is routing: four experts, two lit. It appears in the logo, the hero,
   and in place of section rules - everywhere it means "top-2 of 4", never as decoration. */

:root {
  --es-ink: #131a2b;
  --es-ink-soft: #223049;
  --es-paper: #f7f8fa;
  --es-signal: #e8a33d;
  --es-route: #3e7c8c;
  --es-edge: #c9cfda;

  --md-primary-fg-color: var(--es-ink);
  --md-primary-fg-color--dark: #0d1320;
  --md-accent-fg-color: var(--es-route);
  --md-text-font: "Source Sans 3", "Noto Sans SC", system-ui, sans-serif;
  --md-code-font: "JetBrains Mono", "Noto Sans Mono", "Noto Sans SC", ui-monospace, monospace;
}

[data-md-color-scheme="default"] {
  --md-default-bg-color: var(--es-paper);
  --md-typeset-a-color: #2f6a79;
}

[data-md-color-scheme="slate"] {
  --md-default-bg-color: var(--es-ink);
  --md-default-bg-color--light: var(--es-ink-soft);
  --md-typeset-a-color: #7ec3d2;
  --es-edge: #33405a;
}

.md-header,
.md-tabs {
  background-color: var(--es-ink);
}

/* Display face is used only for headings, so the technical voice stays a punctuation mark rather
   than a costume. */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-nav__title,
.es-hero__claim {
  font-family: "Space Grotesk", var(--md-text-font);
  letter-spacing: -0.02em;
}

.md-typeset h1 {
  font-weight: 600;
  color: inherit;
}

.md-typeset h2 {
  margin-top: 2.4rem;
  font-weight: 600;
}

/* Section rule as the routing motif: four slots, the first two carrying signal. */
.md-typeset hr {
  border: none;
  display: flex;
  gap: 0.3rem;
  height: 0.35rem;
  margin: 2.6rem 0;
}

.md-typeset hr::before,
.md-typeset hr::after {
  content: "";
  height: 100%;
  border-radius: 999px;
}

.md-typeset hr::before {
  width: 3.2rem;
  background: linear-gradient(90deg, var(--es-signal) 0 46%, transparent 46% 54%, var(--es-signal) 54% 100%);
}

.md-typeset hr::after {
  flex: 1;
  background: linear-gradient(90deg, var(--es-edge) 0 46%, transparent 46% 54%, var(--es-edge) 54% 100%);
  opacity: 0.55;
}

/* Hero */
.es-hero {
  margin: 0 0 2.6rem;
  padding: 2.2rem 0 2rem;
  border-bottom: 1px solid var(--es-edge);
}

.es-hero__eyebrow {
  font-family: var(--md-code-font);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--es-route);
}

.es-hero__claim {
  font-size: clamp(1.9rem, 1.1rem + 2.4vw, 3.1rem);
  line-height: 1.08;
  font-weight: 600;
  text-wrap: balance;
  margin: 0.6rem 0 0.9rem;
  max-width: 22ch;
}

.es-hero__claim em {
  font-style: normal;
  color: var(--es-signal);
}

.es-hero__lede {
  max-width: 58ch;
  font-size: 0.94rem;
  opacity: 0.86;
}

/* Router: four experts, two active. Hover walks the active pair one slot to the right, which is
   exactly what a different input would do. */
.es-router {
  display: inline-flex;
  gap: 0.4rem;
  margin: 1.4rem 0 0.2rem;
}

.es-router span {
  width: 2.6rem;
  height: 0.42rem;
  border-radius: 999px;
  background: var(--es-edge);
  transition: background-color 240ms ease;
}

.es-router span:nth-child(-n + 2) {
  background: var(--es-signal);
}

.es-hero:hover .es-router span:nth-child(-n + 2) {
  background: var(--es-edge);
}

.es-hero:hover .es-router span:nth-child(n + 3) {
  background: var(--es-signal);
}

.es-router__label {
  font-family: var(--md-code-font);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

/* Proof strip: three claims, each with the evidence that backs it. */
.md-typeset ul.es-proof {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  gap: 1rem;
  margin: 1.8rem 0 0;
  padding: 0;
  list-style: none;
}

.md-typeset ul.es-proof > li {
  list-style: none;
  border: 1px solid var(--es-edge);
  border-left: 3px solid var(--es-signal);
  border-radius: 0.2rem;
  padding: 0.9rem 1rem;
  margin: 0;
}

.md-typeset ul.es-proof > li::marker {
  content: "";
}

.es-proof strong {
  display: block;
  font-family: "Space Grotesk", var(--md-text-font);
  font-size: 0.98rem;
  line-height: 1.25;
  text-wrap: balance;
  margin-bottom: 0.35rem;
}

.es-proof span {
  font-size: 0.78rem;
  opacity: 0.75;
}

.md-typeset table:not([class]) {
  border: 1px solid var(--es-edge);
  border-radius: 0.2rem;
  font-size: 0.76rem;
}

.md-typeset table:not([class]) th {
  background: color-mix(in srgb, var(--es-route) 12%, transparent);
  font-weight: 600;
}

.md-typeset .highlight pre {
  border-left: 2px solid var(--es-route);
}

@media (prefers-reduced-motion: reduce) {
  .es-router span {
    transition: none;
  }
}

.mermaid-chart {
  margin: 1.8rem 0;
  text-align: center;
  overflow-x: auto;
}

/* Chinese pages: the tracking and small caps that give the English headings their voice turn CJK
   into loose, unreadable characters, and the Latin-only mono face drops them to a fallback. */
[lang="zh"] {
  --md-text-font: "Noto Sans SC", "Source Sans 3", system-ui, sans-serif;
}

[lang="zh"] .es-hero__eyebrow,
[lang="zh"] .es-router__label {
  font-family: var(--md-text-font);
  letter-spacing: 0.04em;
  text-transform: none;
}

[lang="zh"] .md-typeset h1,
[lang="zh"] .md-typeset h2,
[lang="zh"] .md-typeset h3,
[lang="zh"] .es-hero__claim {
  letter-spacing: 0;
}

[lang="zh"] .md-typeset {
  line-height: 1.8;
}

/* The chart host needs a height before ECharts measures it; an inline style on a markdown
   block is easy to lose, a class is not. */
.esmoe-chart {
  width: 100%;
  height: 420px;
}

/* Metric switch above the effect chart, built in JS so both language pages stay identical. */
.esmoe-metric {
  display: flex;
  gap: 0.4rem;
  margin: 0 0 0.5rem;
}

.esmoe-metric button {
  border: 1px solid var(--md-default-fg-color--lightest);
  background: transparent;
  color: var(--md-default-fg-color--light);
  border-radius: 999px;
  padding: 0.18rem 0.72rem;
  font-size: 0.72rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.esmoe-metric button:hover {
  border-color: var(--md-default-fg-color--light);
  color: var(--md-default-fg-color);
}

.esmoe-metric button.is-on {
  border-color: var(--md-primary-fg-color);
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
}

/* Figures on the experiments page: one height per role so a row of two stays level. */
.esmoe-figure {
  width: 100%;
  height: 380px;
  margin: 1.2rem 0 1.6rem;
  border: 1px solid var(--es-edge);
  border-radius: 0.7rem;
  background: color-mix(in srgb, var(--md-default-bg-color) 92%, var(--es-route) 8%);
}

.esmoe-figure--tall {
  height: 460px;
}

.es-duo {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
  gap: 1rem;
}

.es-duo .esmoe-figure {
  margin: 0.4rem 0 1rem;
}

/* Headline numbers: the figure is the claim, the caption says what it counts. */
.md-typeset .es-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 8rem), 1fr));
  gap: 0.8rem;
  margin: 1.4rem 0 2rem;
}

.md-typeset .es-stats > div {
  padding: 0.9rem 1rem 0.8rem;
  border: 1px solid var(--es-edge);
  border-radius: 0.7rem;
  background: linear-gradient(160deg, color-mix(in srgb, var(--es-signal) 10%, transparent), transparent 60%);
}

.md-typeset .es-stats strong {
  display: block;
  font-family: "Space Grotesk", var(--md-text-font);
  font-size: 1.9rem;
  line-height: 1.05;
  font-weight: 600;
  color: var(--es-signal);
}

.md-typeset .es-stats span {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.74rem;
  opacity: 0.8;
}

/* Signposts on the home page: each card is a page, and the whole card is the link. */
.md-typeset .es-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: 0.9rem;
  margin: 1.2rem 0 2rem;
}

.md-typeset .es-cards > a {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid var(--es-edge);
  border-radius: 0.7rem;
  color: inherit;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.md-typeset .es-cards > a:hover,
.md-typeset .es-cards > a:focus-visible {
  border-color: var(--es-route);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--es-route) 18%, transparent);
}

.md-typeset .es-cards strong {
  display: block;
  font-family: "Space Grotesk", var(--md-text-font);
  font-size: 1rem;
  margin-bottom: 0.3rem;
  color: var(--md-typeset-a-color);
}

.md-typeset .es-cards span {
  font-size: 0.76rem;
  opacity: 0.8;
}

@media (prefers-reduced-motion: reduce) {
  .md-typeset .es-cards > a {
    transition: none;
  }
  .md-typeset .es-cards > a:hover {
    transform: none;
  }
}

[lang="zh"] .md-typeset .es-stats strong,
[lang="zh"] .md-typeset .es-cards strong {
  letter-spacing: 0;
}

/* Layout: figures need the width; the two sidebars stay narrow, small and quiet. */
.md-grid {
  max-width: 74rem;
}

html {
  scroll-behavior: smooth;
}

.md-progress {
  background: var(--es-signal);
}

.md-nav {
  font-size: 0.66rem;
}

.md-nav__title {
  font-size: 0.64rem;
  font-weight: 600;
  color: var(--md-default-fg-color--light);
}

.md-nav__link {
  margin-top: 0.5em;
  color: var(--md-default-fg-color--light);
  transition: color 140ms ease;
}

.md-nav__link:hover,
.md-nav__link:focus-visible {
  color: var(--md-typeset-a-color);
}

.md-nav__item .md-nav__link--active,
.md-nav__item .md-nav__link--active code {
  color: var(--md-default-fg-color);
  font-weight: 600;
}

/* The right-hand outline marks where the reader is with the signal colour, nothing else. */
.md-sidebar--secondary .md-nav__link--active {
  position: relative;
}

.md-sidebar--secondary .md-nav__link--active::before {
  content: "";
  position: absolute;
  left: -0.55rem;
  top: 0.15em;
  bottom: 0.15em;
  width: 2px;
  border-radius: 2px;
  background: var(--es-signal);
}

/* Scrollbars: thin, tinted to the page, and out of sight until the pointer is over them. */
* {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--md-default-fg-color) 20%, transparent) transparent;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: 999px;
  background: color-mix(in srgb, var(--md-default-fg-color) 18%, transparent) padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background-color: color-mix(in srgb, var(--md-default-fg-color) 36%, transparent);
}

.md-sidebar__scrollwrap {
  scrollbar-color: transparent transparent;
}

.md-sidebar__scrollwrap:hover {
  scrollbar-color: color-mix(in srgb, var(--md-default-fg-color) 20%, transparent) transparent;
}

/* Figure cards: a number, a title and a note above the chart, the data source below it. */
:root {
  --es-card: #ffffff;
}

[data-md-color-scheme="slate"] {
  --es-card: #151c2a;
}

.md-typeset .es-fig {
  margin: 1.6rem 0 1.8rem;
  padding: 0.85rem 1rem 0.6rem;
  border: 1px solid var(--es-edge);
  border-radius: 0.8rem;
  background: var(--es-card);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--es-ink) 5%, transparent);
}

.md-typeset .es-fig figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.15rem 0.55rem;
  max-width: none;
  margin: 0 0 0.55rem;
  padding: 0;
  text-align: left;
}

.md-typeset .es-fig figcaption b {
  font-family: var(--md-code-font);
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--es-route);
}

.md-typeset .es-fig figcaption span {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--md-default-fg-color);
}

.md-typeset .es-fig figcaption em {
  font-size: 0.66rem;
  font-style: normal;
  color: var(--md-default-fg-color--light);
}

.md-typeset .es-fig small {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.6rem;
  color: var(--md-default-fg-color--light);
}

.md-typeset .es-fig small code {
  padding: 0;
  font-size: 0.6rem;
  background: transparent;
}

.md-typeset .es-fig .esmoe-figure {
  height: 330px;
  margin: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.md-typeset .es-fig--tall .esmoe-figure {
  height: 430px;
}

.md-typeset .es-fig--diagram .mermaid-chart {
  margin: 0.2rem 0;
}

.md-typeset .es-fig .esmoe-metric {
  margin-bottom: 0.3rem;
}

.md-typeset .es-duo {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: 1rem;
  margin: 1.6rem 0;
}

.md-typeset .es-duo .es-fig {
  margin: 0;
}

.mermaid-chart svg {
  max-width: none;
}

/* Tables: Chinese headers stay whole, identifiers stay on one line. */
.md-typeset table:not([class]) {
  word-break: keep-all;
}

.md-typeset table:not([class]) td code {
  white-space: nowrap;
}

.md-typeset table:not([class]) tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--md-default-fg-color) 2.5%, transparent);
}

.md-typeset .es-stats span,
.md-typeset .es-cards span {
  overflow-wrap: anywhere;
}

@media (width <= 44.9375em) {
  .md-typeset .es-fig {
    padding: 0.7rem 0.55rem 0.5rem;
    border-radius: 0.6rem;
  }

  .md-typeset .es-fig .esmoe-figure {
    height: 320px;
  }

  .md-typeset .es-fig--tall .esmoe-figure {
    height: 420px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.es-outdated {
  padding: 0.45rem 1rem;
  font-size: 0.68rem;
  text-align: center;
  color: var(--md-default-fg-color);
  background: color-mix(in srgb, var(--es-signal) 16%, var(--md-default-bg-color));
  border-bottom: 1px solid color-mix(in srgb, var(--es-signal) 40%, transparent);
}

.es-outdated a {
  margin-left: 0.4rem;
  font-weight: 600;
  color: var(--md-typeset-a-color);
}

/* Material shrinks a figure to its content and centres an italic caption; a chart card needs the column. */
.md-typeset figure.es-fig {
  display: block;
  width: auto;
  max-width: none;
}

.md-typeset figure.es-fig figcaption {
  font-style: normal;
}