/* Bloomberg-terminal theme for the docs site.
 *
 * Design rules:
 * - fixed dark: no light scheme, no toggle (mkdocs.yml sets a single `slate` palette)
 * - amber-on-black, monospace everywhere, high information density
 * - system font stack only — no external font requests
 * - WCAG 2.2 AA: body text >= 4.5:1, large text and UI >= 3:1, visible focus, targets >= 24px
 *
 * Palette contrast against the #0b0b0b page background:
 *   #e6e6e6  15.9:1   body text
 *   #cfcfcf  12.5:1   secondary text
 *   #b0b0b0   9.0:1   muted text
 *   #ffb000  10.6:1   headings, links, accents
 *   #ffd580  12.1:1   inline code
 *   #7ee787  10.4:1   "shipped" / success
 *   #ff8a7a   8.5:1   danger
 * The values are asserted by tests/test_theme.py.
 */

:root {
  --term-bg: #0b0b0b;
  --term-surface: #111111;
  --term-surface-2: #161616;
  --term-rule: #2a2a2a;
  --term-rule-strong: #3d3d3d;
  --term-text: #e6e6e6;
  --term-text-2: #cfcfcf;
  --term-muted: #b0b0b0;
  --term-amber: #ffb000;
  --term-amber-soft: #ffd580;
  --term-green: #7ee787;
  --term-red: #ff8a7a;

  --term-mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
    "DejaVu Sans Mono", "Liberation Mono", monospace;

  /* Material overrides */
  --md-text-font-family: var(--term-mono);
  --md-code-font-family: var(--term-mono);
  --md-typeset-font-size: 0.72rem;
}

[data-md-color-scheme="slate"] {
  --md-hue: 0;

  --md-default-bg-color: var(--term-bg);
  --md-default-bg-color--light: var(--term-surface);
  --md-default-bg-color--lighter: var(--term-surface-2);
  --md-default-bg-color--lightest: var(--term-rule);

  --md-default-fg-color: var(--term-text);
  --md-default-fg-color--light: var(--term-text-2);
  --md-default-fg-color--lighter: var(--term-muted);
  --md-default-fg-color--lightest: var(--term-rule);

  --md-primary-fg-color: var(--term-bg);
  --md-primary-bg-color: var(--term-amber);
  --md-accent-fg-color: var(--term-amber-soft);

  --md-typeset-color: var(--term-text);
  --md-typeset-a-color: var(--term-amber);
  --md-typeset-mark-color: #4a3a00;

  --md-code-bg-color: var(--term-surface-2);
  --md-code-fg-color: var(--term-amber-soft);
  --md-code-hl-color: rgba(255, 176, 0, 0.15);
  --md-code-hl-number-color: var(--term-amber-soft);
  --md-code-hl-string-color: var(--term-green);
  --md-code-hl-keyword-color: var(--term-amber);
  --md-code-hl-comment-color: var(--term-muted);

  --md-admonition-bg-color: var(--term-surface);
  --md-footer-bg-color: var(--term-surface);
  --md-footer-fg-color: var(--term-text-2);
}

/* Square, dense, and ruled — the terminal look. */
body,
.md-typeset {
  font-feature-settings: "tnum" 1, "liga" 0;
  letter-spacing: 0;
}

.md-header {
  border-bottom: 2px solid var(--term-amber);
}

.md-tabs {
  border-bottom: 1px solid var(--term-rule);
}

/* Uppercase section labels, tighter leading, amber rules. */
.md-typeset h1 {
  color: var(--term-amber);
  font-size: 1.9rem;
  letter-spacing: 0.01em;
}

.md-typeset h2 {
  color: var(--term-amber);
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--term-rule);
  padding-bottom: 0.25rem;
  margin-top: 1.6rem;
}

.md-typeset h3 {
  color: var(--term-amber-soft);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  color: var(--term-text-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.md-typeset {
  line-height: 1.55;
}

.md-typeset p,
.md-typeset li {
  color: var(--term-text);
}

/* Links: amber, and underlined in prose so colour is never the only cue
 * (WCAG 1.4.1). Dense chrome (nav, tables, header, footer) stays un-underlined. */
.md-typeset a {
  color: var(--term-amber);
  text-decoration: underline;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}

.md-typeset a:hover,
.md-typeset a:focus {
  color: var(--term-amber-soft);
  text-decoration-thickness: 2px;
}

.md-nav a,
.md-header a,
.md-tabs a,
.md-footer a,
.md-typeset table a,
.md-typeset .md-tags a,
.md-typeset .headerlink {
  text-decoration: none;
}

.md-typeset .headerlink:hover,
.md-typeset .headerlink:focus {
  text-decoration: none;
}

/* Material wraps wide tables in a scroll container. Give it a visible boundary so the
 * focus ring added by the a11y script is meaningful. */
.md-typeset__scrollwrap:focus-visible {
  outline: 2px solid var(--term-amber);
  outline-offset: 2px;
}

.md-typeset a:focus-visible,
.md-nav__link:focus-visible,
.md-search__input:focus-visible,
.md-header__button:focus-visible,
.md-footer__link:focus-visible {
  outline: 2px solid var(--term-amber);
  outline-offset: 2px;
}

/* Code: framed blocks, dense gutter. */
.md-typeset code {
  border: 1px solid var(--term-rule);
  border-radius: 0;
  padding: 0.08em 0.3em;
}

.md-typeset pre > code,
.md-typeset .highlight code {
  border: 1px solid var(--term-rule);
  border-left: 3px solid var(--term-amber);
  padding: 0.7rem 0.9rem;
}

.md-typeset .md-clipboard {
  color: var(--term-muted);
}

/* Tables: condensed, ruled, amber header. */
.md-typeset table:not([class]) {
  border: 1px solid var(--term-rule-strong);
  font-size: 0.7rem;
}

.md-typeset table:not([class]) th {
  background-color: var(--term-surface);
  color: var(--term-amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--term-rule-strong);
}

.md-typeset table:not([class]) td {
  border-top: 1px solid var(--term-rule);
  padding: 0.35em 0.6em;
}

.md-typeset table:not([class]) tr:hover {
  background-color: var(--term-surface);
}

/* Admonitions: terminal panels. */
.md-typeset .admonition,
.md-typeset details {
  background-color: var(--term-surface);
  border: 1px solid var(--term-rule);
  border-left: 3px solid var(--term-amber);
  border-radius: 0;
  box-shadow: none;
  font-size: 0.72rem;
}

.md-typeset .admonition-title,
.md-typeset summary {
  background-color: transparent;
  color: var(--term-amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Navigation: dense rows, amber active state, >= 24px targets (WCAG 2.2 §2.5.8). */
.md-nav {
  font-size: 0.68rem;
}

.md-nav__link {
  min-height: 1.5rem;
  display: flex;
  align-items: center;
  padding: 0.15rem 0;
}

.md-nav__link--active,
.md-nav__link--active:hover,
.md-nav__item .md-nav__link--active {
  color: var(--term-amber);
  font-weight: 700;
}

.md-nav__title {
  color: var(--term-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Search: dark input with an amber caret. */
.md-search__input {
  background-color: var(--term-surface);
  color: var(--term-text);
  border: 1px solid var(--term-rule);
  border-radius: 0;
}

.md-search__input::placeholder {
  color: var(--term-muted);
}

.md-search__input:focus {
  border-color: var(--term-amber);
}

/* Mermaid diagrams inherit the palette rather than the default light theme. */
.md-typeset .mermaid {
  text-align: center;
}

/* Scrollbars (WebKit) to keep the terminal feel. */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--term-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--term-rule-strong);
  border-radius: 0;
}

/* Respect the user's motion preference. */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}