/* =============================================================================
 * Guard Eval Harness — documentation theme
 *
 * Light-first, indigo accent, Inter (body) + JetBrains Mono (code).
 * Light gray code/table surfaces with hairline borders, a clean white
 * header, soft-tinted sidebar, and 0.4rem corners throughout.
 * ========================================================================== */

:root {
  /* Indigo scale (Tailwind indigo) — primary accent. */
  --geh-indigo:         #4f46e5;  /* indigo-600 */
  --geh-indigo-dark:    #4338ca;  /* indigo-700 */
  --geh-indigo-darker:  #3730a3;  /* indigo-800 — links */
  --geh-indigo-darkest: #312e81;  /* indigo-900 — link hover */
  --geh-indigo-light:   #6366f1;  /* indigo-500 */
  --geh-indigo-lighter: #818cf8;  /* indigo-400 — dark-mode links */
  --geh-indigo-wash:    rgba(79, 70, 229, 0.05);

  /* Neutral slate scale. */
  --geh-text:    #262626;
  --geh-heading: #404040;
  --geh-muted:   #525252;
  --geh-faint:   #737373;
  --geh-line:    #d4d4d4;
  --geh-border:  #e5e5e5;
  --geh-surface: #f5f5f5;
  --geh-sidebar: #fafafa;

  --md-text-font: "Inter";
  --md-code-font: "JetBrains Mono";

  /* Global corner radius — matches the reference's 0.4rem. */
  --geh-radius: 0.4rem;
}

/* ── Light mode (default) ──────────────────────────────────── */

[data-md-color-scheme="default"] {
  /* White header with dark contents. */
  --md-primary-fg-color: #ffffff;
  --md-primary-fg-color--light: #ffffff;
  --md-primary-fg-color--dark: #ffffff;
  --md-primary-bg-color: var(--geh-text);
  --md-primary-bg-color--light: var(--geh-muted);

  --md-accent-fg-color: var(--geh-indigo);
  --md-typeset-a-color: var(--geh-indigo-darker);

  --md-default-fg-color: var(--geh-text);
  --md-default-bg-color: #ffffff;
  --md-code-bg-color: var(--geh-surface);
  --md-code-fg-color: #171717;

  --md-footer-bg-color: #000000;
  --md-footer-bg-color--dark: #000000;
}

/* ── Dark mode (slate) — coherent dark counterpart ─────────── */

[data-md-color-scheme="slate"] {
  --md-primary-fg-color: #111114;
  --md-primary-fg-color--light: #1a1a1f;
  --md-primary-fg-color--dark: #0b0b0d;
  --md-primary-bg-color: #e5e5e5;
  --md-primary-bg-color--light: #a3a3a3;

  --md-accent-fg-color: var(--geh-indigo-lighter);
  --md-typeset-a-color: var(--geh-indigo-lighter);

  --md-default-bg-color: #0b0b0d;
  --md-default-fg-color--light: #a3a3a3;
  --md-code-bg-color: #16161a;

  --md-footer-bg-color: #000000;
  --md-footer-bg-color--dark: #000000;
}

/* ── Header ────────────────────────────────────────────────── */

.md-header {
  box-shadow: none;
  border-bottom: 1px solid var(--geh-border);
}

[data-md-color-scheme="slate"] .md-header {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

/* Header logo — 20% larger than Material's default 1.2rem. */
.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 1.44rem;
  width: auto;
}

/* Tabs bar reads as a continuation of the header, not a colored strip. */
.md-tabs {
  background: transparent;
  border-bottom: 1px solid var(--geh-border);
  color: var(--md-default-fg-color);
}

[data-md-color-scheme="slate"] .md-tabs {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.md-tabs__link {
  opacity: 0.85;
  font-weight: 500;
}

.md-tabs__link--active,
.md-tabs__link:hover {
  opacity: 1;
  color: var(--geh-indigo);
}

[data-md-color-scheme="slate"] .md-tabs__link--active,
[data-md-color-scheme="slate"] .md-tabs__link:hover {
  color: var(--geh-indigo-lighter);
}

/* Search on a soft surface. The surface, border, and radius live on the
 * form (the visual container); the input stays transparent so the rounded
 * corners are clean — otherwise the form's near-square corner peeks out
 * behind a rounded input. `overflow: hidden` clips any inner square edges. */
.md-search__form {
  background-color: var(--geh-surface);
  border: 1px solid var(--geh-border);
  border-radius: var(--geh-radius);
  box-shadow: none;
  overflow: hidden;
}

.md-search__form:hover {
  background-color: var(--geh-surface);
}

.md-search__input {
  background-color: transparent;
  border-radius: var(--geh-radius);
}

[data-md-color-scheme="slate"] .md-search__form {
  background-color: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.08);
}

[data-md-color-scheme="slate"] .md-search__form:hover {
  background-color: rgba(255, 255, 255, 0.06);
}

/* ── Sidebar navigation ────────────────────────────────────── */

@media screen and (min-width: 76.25em) {
  .md-sidebar--primary {
    background-color: var(--geh-sidebar);
    box-shadow: 1px 0 0 0 var(--geh-border);
  }

  [data-md-color-scheme="slate"] .md-sidebar--primary {
    background-color: #0d0d10;
    box-shadow: 1px 0 0 0 rgba(255, 255, 255, 0.06);
  }
}

/* Top-level section labels → uppercase eyebrows, like the reference. */
.md-nav__item--section > .md-nav__link {
  text-transform: uppercase;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--geh-faint);
}

.md-nav__link {
  font-size: 0.78rem;
  font-weight: 500;
  border-radius: 0;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.md-nav__link:is([href]):hover {
  color: var(--geh-indigo);
}

/* Active item — indigo text + left-bar accent, not a pill. */
.md-nav__item .md-nav__link--active {
  color: var(--geh-indigo);
  font-weight: 600;
  background-color: var(--geh-indigo-wash);
  border-left: 2px solid var(--geh-indigo);
  padding-left: 0.55rem;
}

[data-md-color-scheme="slate"] .md-nav__link:is([href]):hover,
[data-md-color-scheme="slate"] .md-nav__item .md-nav__link--active {
  color: var(--geh-indigo-lighter);
  border-left-color: var(--geh-indigo-lighter);
}

[data-md-color-scheme="slate"] .md-nav__item .md-nav__link--active {
  background-color: rgba(129, 140, 248, 0.1);
}

/* ── Table of contents (right) ─────────────────────────────── */

.md-nav--secondary .md-nav__title {
  text-transform: uppercase;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--geh-faint);
}

.md-nav--secondary .md-nav__link--active {
  color: var(--geh-indigo);
  font-weight: 600;
}

[data-md-color-scheme="slate"] .md-nav--secondary .md-nav__link--active {
  color: var(--geh-indigo-lighter);
}

/* ── Typography ────────────────────────────────────────────── */

.md-typeset {
  line-height: 1.7;
}

.md-typeset h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--geh-heading);
  margin-bottom: 1.25rem;
}

.md-typeset h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--geh-heading);
  margin-top: 2rem;
}

.md-typeset h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--geh-heading);
  margin-top: 1.5rem;
}

.md-typeset h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--geh-heading);
}

[data-md-color-scheme="slate"] .md-typeset h1,
[data-md-color-scheme="slate"] .md-typeset h2,
[data-md-color-scheme="slate"] .md-typeset h3,
[data-md-color-scheme="slate"] .md-typeset h4 {
  color: #e5e5e5;
}

/* ── Links ─────────────────────────────────────────────────── */

.md-typeset a {
  font-weight: 500;
}

.md-typeset a:hover {
  color: var(--geh-indigo-darkest);
  text-decoration: underline;
}

[data-md-color-scheme="slate"] .md-typeset a:hover {
  color: #c4c3ff;
}

/* ── Inline code ───────────────────────────────────────────── */

.md-typeset code {
  border-radius: var(--geh-radius);
  font-size: 0.85em;
  padding: 0.06rem 0.32rem;
  background-color: var(--md-code-bg-color);
  border: 1px solid rgba(23, 23, 23, 0.06);
}

[data-md-color-scheme="slate"] .md-typeset code {
  border-color: rgba(255, 255, 255, 0.08);
}

/* ── Code blocks ───────────────────────────────────────────── */

.md-typeset pre > code,
.md-typeset .highlight {
  border-radius: var(--geh-radius);
}

.md-typeset pre > code {
  border: 1px solid var(--geh-border);
}

[data-md-color-scheme="slate"] .md-typeset pre > code {
  border-color: rgba(255, 255, 255, 0.08);
}

.md-typeset .highlight .filename {
  background: var(--geh-surface);
  border: 1px solid var(--geh-border);
  border-bottom: none;
  border-top-left-radius: var(--geh-radius);
  border-top-right-radius: var(--geh-radius);
}

[data-md-color-scheme="slate"] .md-typeset .highlight .filename {
  background: #16161a;
  border-color: rgba(255, 255, 255, 0.08);
}

.md-clipboard:hover {
  color: var(--geh-indigo);
}

/* ── Tables — rounded, light header strip, hairline rows ───── */

.md-typeset table:not([class]) {
  border: 1px solid var(--geh-border);
  border-radius: var(--geh-radius);
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
}

.md-typeset table:not([class]) th {
  background-color: var(--geh-surface);
  color: var(--geh-text);
  font-weight: 700;
  text-align: center;
  border: none;
  border-bottom: 1px solid var(--geh-border);
}

.md-typeset table:not([class]) td {
  border: none;
  border-bottom: 1px solid var(--geh-border);
  vertical-align: top;
}

.md-typeset table:not([class]) tr:last-child td {
  border-bottom: none;
}

.md-typeset table:not([class]) tbody tr:hover {
  background-color: var(--geh-indigo-wash);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) {
  border-color: rgba(255, 255, 255, 0.1);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background-color: rgba(255, 255, 255, 0.04);
  color: #ffffff;
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) th,
[data-md-color-scheme="slate"] .md-typeset table:not([class]) td {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

/* ── Admonitions / callouts ────────────────────────────────── */

.md-typeset .admonition,
.md-typeset details {
  border-radius: var(--geh-radius);
  border-width: 1px;
  border-left-width: 4px;
  font-size: 0.78rem;
}

.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-color: var(--geh-indigo-light);
}

.md-typeset .tip > .admonition-title,
.md-typeset .tip > summary {
  background-color: var(--geh-indigo-wash);
}

.md-typeset .tip > .admonition-title::before,
.md-typeset .tip > summary::before {
  background-color: var(--geh-indigo);
}

.md-typeset .admonition.info,
.md-typeset details.info {
  border-color: var(--geh-indigo);
}

.md-typeset .info > .admonition-title,
.md-typeset .info > summary {
  background-color: var(--geh-indigo-wash);
}

/* ── Content tabs ──────────────────────────────────────────── */

.md-typeset .tabbed-labels > label:hover,
.md-typeset .tabbed-set > input:checked + label {
  color: var(--geh-indigo);
}

.md-typeset .tabbed-set > input:checked + label {
  border-color: var(--geh-indigo);
}

[data-md-color-scheme="slate"] .md-typeset .tabbed-labels > label:hover,
[data-md-color-scheme="slate"] .md-typeset .tabbed-set > input:checked + label {
  color: var(--geh-indigo-lighter);
  border-color: var(--geh-indigo-lighter);
}

/* ── Buttons ───────────────────────────────────────────────── */

.md-typeset .md-button {
  border-radius: var(--geh-radius);
  font-weight: 600;
}

.md-typeset .md-button--primary {
  background-color: var(--geh-indigo);
  border-color: var(--geh-indigo);
  color: #ffffff;
}

.md-typeset .md-button--primary:hover {
  background-color: var(--geh-indigo-dark);
  border-color: var(--geh-indigo-dark);
  box-shadow: 0 4px 12px -4px rgba(79, 70, 229, 0.45);
}

/* ── Home page feature cards ───────────────────────────────── */

.md-typeset .grid.cards > ul > li,
.md-typeset .grid > .card {
  background: #ffffff;
  border: 1px solid var(--geh-border);
  border-radius: var(--geh-radius);
  padding: 1.2rem 1.25rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease,
    transform 0.15s ease;
}

.md-typeset .grid.cards > ul > li:hover,
.md-typeset .grid > .card:hover {
  border-color: rgba(79, 70, 229, 0.4);
  box-shadow: 0 8px 22px -14px rgba(79, 70, 229, 0.35);
  transform: translateY(-1px);
}

.md-typeset .grid.cards > ul > li > hr {
  margin: 0.6rem 0;
}

.md-typeset .grid.cards .twemoji,
.md-typeset .grid.cards .md-typeset .twemoji {
  color: var(--geh-indigo);
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > ul > li,
[data-md-color-scheme="slate"] .md-typeset .grid > .card {
  background: #16161a;
  border-color: rgba(255, 255, 255, 0.08);
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > ul > li:hover,
[data-md-color-scheme="slate"] .md-typeset .grid > .card:hover {
  border-color: rgba(129, 140, 248, 0.4);
}

/* ── Footer ────────────────────────────────────────────────── */

.md-footer-meta {
  background-color: #000000;
}

/* ── Scrollbar (subtle) ────────────────────────────────────── */

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

::-webkit-scrollbar-thumb {
  background: var(--geh-line);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--geh-indigo-light);
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-thumb {
  background: #2b2c2c;
}

[data-md-color-scheme="slate"] ::-webkit-scrollbar-thumb:hover {
  background: var(--geh-indigo);
}

/* ── Progress bar (navigation.instant.progress) ────────────── */

.md-progress {
  background: linear-gradient(90deg, var(--geh-indigo), var(--geh-indigo-light));
}

/* ── Mermaid diagrams ──────────────────────────────────────── */

.mermaid {
  background: transparent;
}

/* ── Home page badges ──────────────────────────────────────── */

.md-typeset img[alt="PyPI"],
.md-typeset img[alt="License"],
.md-typeset img[alt="Datasets"],
.md-typeset img[alt="Modalities"] {
  display: inline;
  margin: 0 2px;
}