/*
 * Hugging Face docs styling for MkDocs Material.
 *
 * Approximates the huggingface.co/docs look: a white shell with hairline
 * borders instead of a colored header bar, HF yellow/orange as the only accent,
 * Source Sans for prose, IBM Plex Mono for code, and a near-black dark mode.
 */

:root {
  /* Hugging Face brand */
  --hf-yellow: #ffd21e;
  --hf-orange: #ff9d00;
  --hf-blue: #2563eb;

  /* Light shell */
  --hf-bg: #ffffff;
  --hf-bg-subtle: #f9fafb;
  --hf-border: #ebedf0;
  --hf-text: #1f2937;
  --hf-text-muted: #6b7280;
  --hf-code-bg: #f6f7f9;

  --md-text-font: "Source Sans 3", "Source Sans Pro", system-ui, sans-serif;
  --md-code-font: "IBM Plex Mono", ui-monospace, monospace;
}

/* ---------------------------------------------------------------- palette */

[data-md-color-scheme="default"] {
  --md-default-bg-color: var(--hf-bg);
  --md-default-fg-color: var(--hf-text);
  --md-default-fg-color--light: var(--hf-text-muted);
  --md-default-fg-color--lighter: #9ca3af;
  --md-default-fg-color--lightest: var(--hf-border);

  --md-primary-fg-color: var(--hf-bg);
  --md-primary-bg-color: var(--hf-text);
  --md-primary-bg-color--light: var(--hf-text-muted);

  --md-accent-fg-color: var(--hf-orange);
  --md-typeset-a-color: var(--hf-blue);

  --md-code-bg-color: var(--hf-code-bg);
  --md-code-fg-color: #24292f;

  --md-footer-bg-color: var(--hf-bg);
  --md-footer-bg-color--dark: var(--hf-bg-subtle);
  --md-footer-fg-color: var(--hf-text);

  color-scheme: light;
}

[data-md-color-scheme="slate"] {
  --hf-bg: #0f0f0f;
  --hf-bg-subtle: #161616;
  --hf-border: #262626;
  --hf-text: #e5e7eb;
  --hf-text-muted: #9ca3af;
  --hf-code-bg: #161b22;

  --md-default-bg-color: var(--hf-bg);
  --md-default-fg-color: var(--hf-text);
  --md-default-fg-color--light: var(--hf-text-muted);
  --md-default-fg-color--lighter: #6b7280;
  --md-default-fg-color--lightest: var(--hf-border);

  --md-primary-fg-color: var(--hf-bg);
  --md-primary-bg-color: var(--hf-text);
  --md-primary-bg-color--light: var(--hf-text-muted);

  --md-accent-fg-color: var(--hf-yellow);
  --md-typeset-a-color: #7aa2f7;

  --md-code-bg-color: var(--hf-code-bg);
  --md-code-fg-color: #c9d1d9;

  --md-footer-bg-color: var(--hf-bg);
  --md-footer-bg-color--dark: var(--hf-bg-subtle);
  --md-footer-fg-color: var(--hf-text);

  --md-typeset-kbd-color: #21262d;
  --md-typeset-table-color: var(--hf-border);

  color-scheme: dark;
}

/* ----------------------------------------------------------------- header */

/* HF has no colored header band — a white bar separated by a hairline. */
.md-header {
  background-color: var(--hf-bg);
  color: var(--hf-text);
  border-bottom: 1px solid var(--hf-border);
  box-shadow: none;
}

.md-header--shadow {
  box-shadow: none;
}

.md-header__title {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.md-tabs {
  background-color: var(--hf-bg);
  color: var(--hf-text);
  border-bottom: 1px solid var(--hf-border);
}

/* Search box: pill-shaped, subtle fill — the HF search affordance. */
.md-search__form {
  background-color: var(--hf-bg-subtle);
  border: 1px solid var(--hf-border);
  border-radius: 8px;
  box-shadow: none;
}

.md-search__form:hover {
  background-color: var(--hf-bg-subtle);
  border-color: var(--hf-text-muted);
}

[data-md-toggle="search"]:checked ~ .md-header .md-search__form {
  border-radius: 8px 8px 0 0;
}

/* ---------------------------------------------------------------- sidebar */

.md-sidebar {
  padding-top: 1.2rem;
}

.md-nav {
  font-size: 0.72rem;
}

.md-nav__title {
  color: var(--hf-text-muted);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.md-nav__link {
  border-radius: 6px;
  color: var(--hf-text-muted);
  margin: 1px 0;
  padding: 0.22rem 0.42rem;
  transition: background-color 80ms, color 80ms;
}

.md-nav__link:hover {
  background-color: var(--hf-bg-subtle);
  color: var(--hf-text);
}

/* Active page: HF marks it with a soft fill and weight, not a color shift. */
.md-nav__item .md-nav__link--active,
.md-nav__item .md-nav__link--active:hover {
  background-color: var(--hf-bg-subtle);
  color: var(--hf-text);
  font-weight: 600;
}

.md-nav--secondary .md-nav__link--active {
  background-color: transparent;
  box-shadow: inset 2px 0 0 var(--hf-yellow);
}

.md-nav--primary .md-nav__title[for="__drawer"] {
  background-color: var(--hf-bg);
  color: var(--hf-text);
  border-bottom: 1px solid var(--hf-border);
  box-shadow: none;
}

/* Section headers in the sidebar, e.g. an assignment's name. */
.md-nav__item--section > .md-nav__link {
  color: var(--hf-text);
  font-weight: 700;
}

/* ------------------------------------------------------------------ prose */

.md-typeset {
  font-size: 0.79rem;
  line-height: 1.68;
}

.md-typeset h1 {
  color: var(--hf-text);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.md-typeset h2 {
  border-bottom: 1px solid var(--hf-border);
  font-weight: 650;
  letter-spacing: -0.01em;
  margin-top: 2.2em;
  padding-bottom: 0.3em;
}

.md-typeset h3,
.md-typeset h4 {
  font-weight: 600;
  letter-spacing: -0.005em;
}

.md-typeset a {
  text-decoration: none;
}

.md-typeset a:hover {
  text-decoration: underline;
  text-decoration-color: var(--hf-yellow);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

/* ------------------------------------------------------------------- code */

.md-typeset code {
  background-color: var(--md-code-bg-color);
  border-radius: 4px;
  font-size: 0.86em;
  padding: 0.12em 0.34em;
}

.md-typeset pre > code {
  border: 1px solid var(--hf-border);
  border-radius: 10px;
  padding: 0.8rem 0.9rem;
}

.md-typeset .highlight span.filename {
  background-color: var(--hf-bg-subtle);
  border: 1px solid var(--hf-border);
  border-bottom: none;
  border-radius: 10px 10px 0 0;
  color: var(--hf-text-muted);
  font-weight: 600;
}

/* ----------------------------------------------------------------- tables */

/* The ADR indexes are tables — they carry a lot of this site. */
.md-typeset table:not([class]) {
  border: 1px solid var(--hf-border);
  border-radius: 10px;
  box-shadow: none;
  font-size: 0.72rem;
}

.md-typeset table:not([class]) th {
  background-color: var(--hf-bg-subtle);
  color: var(--hf-text);
  font-weight: 600;
}

.md-typeset table:not([class]) td {
  border-top: 1px solid var(--hf-border);
}

/* ------------------------------------------------------- admonitions etc. */

.md-typeset .admonition,
.md-typeset details {
  border: 1px solid var(--hf-border);
  border-left-width: 3px;
  border-radius: 8px;
  box-shadow: none;
  font-size: 0.74rem;
}

.md-typeset blockquote {
  border-left: 3px solid var(--hf-yellow);
  color: var(--hf-text-muted);
}

.md-typeset hr {
  border-bottom: 1px solid var(--hf-border);
}

/* ----------------------------------------------------------------- footer */

.md-footer {
  border-top: 1px solid var(--hf-border);
}

.md-footer-meta {
  background-color: var(--hf-bg);
}

.md-footer__link:hover {
  color: var(--hf-orange);
  opacity: 1;
}

.md-copyright {
  color: var(--hf-text-muted);
}

/* Selection and focus pick up the brand yellow. */
::selection {
  background-color: rgba(255, 210, 30, 0.4);
}

.md-typeset :target {
  --md-scroll-margin: 4rem;
}

/* Screenshots. A full-page capture runs to several thousand pixels, so every
   image is capped to a readable thumbnail here and opened at full size by
   glightbox — see the plugin block in mkdocs.yml. */
.md-typeset img {
  max-width: 100%;
  max-height: 30rem;
  width: auto;
  border: 1px solid var(--hf-border);
  border-radius: 6px;
}

/* glightbox wraps each image in an inline anchor; block-level so the capped
   image centres in the text column instead of sitting flush left. */
.md-typeset a.glightbox {
  display: block;
  text-align: center;
}

.md-typeset a.glightbox img {
  cursor: zoom-in;
  transition: border-color 120ms ease;
}

.md-typeset a.glightbox:hover img {
  border-color: var(--hf-orange);
}

/* The default backdrop is light enough that the page reads through it. */
.glightbox-container .goverlay {
  background: rgba(0, 0, 0, 0.85);
}

.glightbox-clean .gslide-description {
  background: var(--hf-bg);
}

.glightbox-clean .gslide-title,
.glightbox-clean .gslide-desc {
  color: var(--hf-text);
  font-family: var(--md-text-font-family), sans-serif;
}