/*
 * Bernstein docs theme.
 *
 * Maps the design tokens in docs/design/tokens.md (machine-readable copy:
 * docs/design/tokens.json) onto Material for MkDocs. Light values come from
 * the website surface, dark from the operator UI, per the canonical-accent
 * decision in tokens.md. Every colour below is a token or a token at a stated
 * opacity; the three derived values (--bn-faint, --bn-rule-strong,
 * --bn-code-bg) are the website's own oklch() steps converted to hex, with the
 * contrast measured against the backgrounds they sit on.
 *
 * Layout of this file:
 *   1. tokens (light, dark) and their mapping onto Material variables
 *   2. base: fonts, links, focus, selection, scrollbars
 *   3. chrome: header, tabs, sidebars, table of contents, footer
 *   4. content: headings, code, admonitions, tables, content tabs, cards,
 *      buttons, images
 *   5. search
 *   6. home page
 *   7. reduced motion, print
 */

/* ===================================================================
 * 1. Tokens
 * =================================================================== */

:root {
  --bn-font-display: "Fraunces", "Iowan Old Style", Charter, Georgia, serif;
  --bn-font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --bn-font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Cascadia Code", monospace;

  /* 8px grid, from tokens.md "Spacing and radii". Material sets the root
     font-size to 125% (1rem = 20px), so spacing is written in px. */
  --bn-space-1: 4px;
  --bn-space-2: 8px;
  --bn-space-3: 12px;
  --bn-space-4: 16px;
  --bn-space-5: 24px;
  --bn-space-6: 32px;
  --bn-space-7: 48px;

  --bn-radius-sm: 4px;   /* inline code, focus rings, chips */
  --bn-radius: 8px;      /* code blocks, admonitions, inputs, buttons */
  --bn-radius-lg: 12px;  /* cards, panels */

  --bn-dur-1: 100ms;
  --bn-dur-2: 150ms;
  --bn-dur-3: 200ms;
}

/* Light: Material scheme "default". */
[data-md-color-scheme="default"] {
  --bn-bg: #F8F1E7;           /* bg */
  --bn-surface: #F3EADD;      /* surface */
  --bn-code-bg: #E9E0D4;      /* website --code-paper, oklch(91% 0.018 75) */
  --bn-ink: #181614;          /* text          16.1:1 on bg */
  --bn-muted: #575552;        /* muted          6.6:1 on bg, 5.7:1 on code */
  --bn-faint: #656360;        /* oklch(50% 0.005 60): 5.3:1 on bg, 4.6:1 on code */
  --bn-rule: #D2CDC7;         /* border */
  --bn-rule-strong: #A29E98;  /* oklch(70% 0.01 75), lines only */
  --bn-accent: #A35B48;       /* accent: 4.5:1 on bg, so accent text sits on bg only */
  --bn-accent-ink: #934C3A;   /* oklch(50% 0.10 35): accent text on surface / code, 4.8-5.3:1 */
  --bn-accent-tint: rgba(163, 91, 72, 0.10);
  --bn-success: #376139;
  --bn-warning: #9C622F;      /* 4.4:1 on bg: rails, icons and fills only */
  --bn-danger: #9C433F;
  --bn-selection: rgba(163, 91, 72, 0.22);
  --bn-shadow-pop: 0 6px 16px rgba(24, 22, 20, 0.10);
}

/* Dark: Material scheme "slate". */
[data-md-color-scheme="slate"] {
  --md-hue: 60;

  --bn-bg: #13130F;
  --bn-surface: #1A1A15;
  --bn-code-bg: #1A1A15;
  --bn-ink: #F2EFE6;
  --bn-muted: #A39D8C;        /* 6.9:1 on bg, 6.5:1 on surface */
  --bn-faint: #A39D8C;
  --bn-rule: #33332B;
  --bn-rule-strong: #4A4A40;
  --bn-accent: #DB8E7A;
  --bn-accent-ink: #DB8E7A;   /* 6.8:1 on surface */
  --bn-accent-tint: rgba(219, 142, 122, 0.12);
  --bn-success: #7FC58A;
  --bn-warning: #D9B26B;
  --bn-danger: #E58B80;
  --bn-selection: rgba(219, 142, 122, 0.28);
  --bn-shadow-pop: 0 6px 16px rgba(0, 0, 0, 0.45);
}

/* Token → Material variable mapping, shared by both schemes. */
[data-md-color-scheme] {
  --md-default-bg-color: var(--bn-bg);
  --md-default-bg-color--light: var(--bn-bg);
  --md-default-bg-color--lighter: var(--bn-bg);
  --md-default-bg-color--lightest: var(--bn-surface);
  --md-default-bg-color--dark: var(--bn-surface);

  --md-default-fg-color: var(--bn-ink);
  --md-default-fg-color--light: var(--bn-muted);
  --md-default-fg-color--lighter: var(--bn-rule-strong);
  --md-default-fg-color--lightest: var(--bn-rule);

  /* Header and tabs sit on the page background, as on the website; the
     palette is "custom" in mkdocs.yml so Material adds no colours of its own. */
  --md-primary-fg-color: var(--bn-ink);
  --md-primary-fg-color--light: var(--bn-muted);
  --md-primary-fg-color--dark: var(--bn-ink);
  --md-primary-bg-color: var(--bn-bg);
  --md-primary-bg-color--light: var(--bn-muted);

  --md-accent-fg-color: var(--bn-accent);
  --md-accent-fg-color--transparent: var(--bn-accent-tint);
  --md-accent-bg-color: var(--bn-bg);
  --md-accent-bg-color--light: var(--bn-bg);

  --md-typeset-color: var(--bn-ink);
  --md-typeset-a-color: var(--bn-ink);
  --md-typeset-mark-color: var(--bn-accent-tint);
  --md-typeset-del-color: rgba(156, 67, 63, 0.15);
  --md-typeset-ins-color: rgba(55, 97, 57, 0.15);
  --md-typeset-kbd-color: var(--bn-surface);
  --md-typeset-kbd-accent-color: var(--bn-rule);
  --md-typeset-kbd-border-color: var(--bn-rule-strong);
  --md-typeset-table-color: var(--bn-rule);
  --md-typeset-table-color--light: var(--bn-surface);

  --md-code-bg-color: var(--bn-code-bg);
  --md-code-fg-color: var(--bn-ink);
  --md-code-hl-color: var(--bn-accent);
  --md-code-hl-color--light: var(--bn-accent-tint);

  --md-admonition-fg-color: var(--bn-ink);
  --md-admonition-bg-color: var(--bn-surface);

  --md-footer-bg-color: var(--bn-bg);
  --md-footer-bg-color--dark: var(--bn-bg);
  --md-footer-fg-color: var(--bn-ink);
  --md-footer-fg-color--light: var(--bn-muted);
  --md-footer-fg-color--lighter: var(--bn-faint);

  --md-shadow-z1: none;
  --md-shadow-z2: var(--bn-shadow-pop);
  --md-shadow-z3: var(--bn-shadow-pop);

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

/* Syntax highlighting: four semantic roles plus ink and muted, the same
   rule the terminal palette follows. Every colour clears 4.5:1 on the
   code background in its scheme. */
[data-md-color-scheme="default"] {
  --md-code-hl-keyword-color: #934C3A;     /* 4.8:1 */
  --md-code-hl-string-color: #376139;      /* 5.5:1 */
  --md-code-hl-number-color: #8C541F;      /* 4.7:1 */
  --md-code-hl-constant-color: #8C541F;
  --md-code-hl-special-color: #9C433F;     /* 4.9:1 */
  --md-code-hl-function-color: #181614;
  --md-code-hl-name-color: #181614;
  --md-code-hl-variable-color: #181614;
  --md-code-hl-operator-color: #575552;    /* 5.7:1 */
  --md-code-hl-punctuation-color: #575552;
  --md-code-hl-comment-color: #656360;     /* 4.6:1 */
  --md-code-hl-generic-color: #575552;
}
[data-md-color-scheme="slate"] {
  --md-code-hl-keyword-color: #DB8E7A;     /* 6.8:1 */
  --md-code-hl-string-color: #7FC58A;      /* 8.5:1 */
  --md-code-hl-number-color: #D9B26B;      /* 8.8:1 */
  --md-code-hl-constant-color: #D9B26B;
  --md-code-hl-special-color: #E58B80;     /* 6.9:1 */
  --md-code-hl-function-color: #F2EFE6;
  --md-code-hl-name-color: #F2EFE6;
  --md-code-hl-variable-color: #F2EFE6;
  --md-code-hl-operator-color: #A39D8C;    /* 6.5:1 */
  --md-code-hl-punctuation-color: #A39D8C;
  --md-code-hl-comment-color: #A39D8C;
  --md-code-hl-generic-color: #A39D8C;
}

/* ===================================================================
 * 2. Base
 * =================================================================== */

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1;
}

body,
input {
  font-family: var(--bn-font-body);
}

code,
kbd,
pre {
  font-family: var(--bn-font-mono);
  font-feature-settings: "kern" 1, "zero" 0;
}

::selection {
  background-color: var(--bn-selection);
  color: var(--bn-ink);
}

/* Focus: one accent ring with an offset, everywhere. */
:focus-visible,
.md-typeset a:focus-visible,
.md-nav__link:focus-visible,
.md-tabs__link:focus-visible,
.md-header__button:focus-visible,
.md-search__input:focus-visible,
.md-typeset .tabbed-labels > label:focus-visible,
.md-clipboard:focus-visible {
  outline: 2px solid var(--bn-accent);
  outline-offset: 2px;
  border-radius: var(--bn-radius-sm);
}

/* Scrollbars stay on the warm neutrals. */
html {
  scrollbar-color: var(--bn-rule-strong) transparent;
}
.md-sidebar__scrollwrap,
.md-search__scrollwrap,
.md-typeset pre > code {
  scrollbar-color: var(--bn-rule-strong) transparent;
}
.md-sidebar__scrollwrap:hover,
.md-typeset pre > code:hover {
  scrollbar-color: var(--bn-faint) transparent;
}

/* Links in running text: ink with a hairline underline; hover moves both
   to the accent. Colour alone never carries the link. */
.md-typeset a {
  color: var(--bn-ink);
  text-decoration: underline;
  text-decoration-color: var(--bn-rule-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color var(--bn-dur-2) ease-out, text-decoration-color var(--bn-dur-2) ease-out;
}
.md-typeset a:hover,
.md-typeset a:focus-visible {
  color: var(--bn-accent);
  text-decoration-color: var(--bn-accent);
}
.md-typeset a code {
  color: inherit;
}
/* Heading permalinks, buttons, cards and footnote refs carry their own
   affordance; the underline would be noise there. */
.md-typeset .headerlink,
.md-typeset .tabbed-labels a,
.md-typeset .md-button,
.md-typeset .footnote-ref,
.md-typeset .footnote-backref,
.md-typeset .grid.cards a:has(> img),
.md-typeset .bn-hero a {
  text-decoration: none;
}

/* ===================================================================
 * 3. Chrome
 * =================================================================== */

/* Header: page background, one hairline, no shadow. */
.md-header {
  background-color: var(--bn-bg);
  color: var(--bn-ink);
  box-shadow: none;
  border-bottom: 1px solid var(--bn-rule);
}
.md-header--shadow {
  box-shadow: none;
}
.md-header__button {
  color: var(--bn-ink);
}
.md-header__button.md-logo {
  padding: var(--bn-space-2);
  margin-right: 0;
}
.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 26px;
  width: auto;
}

/* Lock-up: the mark, then "bernstein" in the display serif, then an
   italic "docs" in the faint ink - the same shape as the website's
   "bernstein.run". */
.md-header__title {
  margin-left: var(--bn-space-1);
  font-family: var(--bn-font-display);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.md-header__topic:first-child .md-ellipsis {
  text-transform: lowercase;
}
.md-header__topic:first-child .md-ellipsis::after {
  content: " docs";
  font-style: italic;
  font-weight: 400;
  color: var(--bn-faint);
}
/* The second topic (current page title, shown on scroll) stays in the
   UI face so it does not compete with the lock-up. */
.md-header__topic + .md-header__topic {
  font-family: var(--bn-font-body);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
}

.md-header__option .md-header__button,
.md-header__source {
  color: var(--bn-muted);
}
.md-header__option .md-header__button:hover,
.md-header__source:hover {
  color: var(--bn-ink);
  opacity: 1;
}
.md-source {
  font-family: var(--bn-font-body);
  font-size: 13px;
  color: var(--bn-muted);
  transition: color var(--bn-dur-2) ease-out;
}
.md-source:hover {
  color: var(--bn-ink);
  opacity: 1;
}
.md-source__facts {
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

/* Section tabs: UI text in muted ink; the active tab goes to ink with a
   1px accent rule under it, the website's nav treatment. */
.md-tabs {
  background-color: var(--bn-bg);
  color: var(--bn-muted);
  border-bottom: 1px solid var(--bn-rule);
}
.md-tabs__list {
  contain: none;
}
.md-tabs__item {
  height: auto;
  padding-left: var(--bn-space-3);
  padding-right: var(--bn-space-3);
}
.md-tabs__link {
  position: relative;
  margin-top: 0;
  padding: 11px 0 12px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--bn-muted);
  opacity: 1;
  transition: color var(--bn-dur-2) ease-out;
}
.md-tabs__link:hover,
.md-tabs__link:focus-visible {
  color: var(--bn-ink);
}
.md-tabs__item--active .md-tabs__link {
  color: var(--bn-ink);
}
.md-tabs__item--active .md-tabs__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background-color: var(--bn-accent);
}

/* Sidebars. */
.md-nav {
  font-size: 14px;
  line-height: 1.4;
}
.md-nav__title {
  color: var(--bn-muted);
}
.md-nav__link {
  margin-top: 6px;
  color: var(--bn-muted);
  transition: color var(--bn-dur-2) ease-out;
}
.md-nav__link:hover,
.md-nav__link:focus-visible,
.md-nav__item .md-nav__link--active:hover {
  color: var(--bn-ink);
}
.md-nav__item .md-nav__link--active,
.md-nav__item .md-nav__link--active code {
  color: var(--bn-ink);
  font-weight: 600;
}

/* Section headings in the primary nav become mono eyebrows. */
.md-nav--primary .md-nav__item--section > .md-nav__link,
.md-nav--primary .md-nav__item--section > .md-nav__link[for] {
  margin-top: var(--bn-space-5);
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bn-faint);
}
.md-nav--primary .md-nav__item--section:first-child > .md-nav__link {
  margin-top: var(--bn-space-2);
}

/* Active page in the primary nav: a 2px accent rail on the left edge. */
@media screen and (min-width: 76.25em) {
  .md-nav--primary .md-nav__item > .md-nav__link--active {
    position: relative;
  }
  .md-nav--primary .md-nav__item > .md-nav__link--active::before {
    content: "";
    position: absolute;
    left: -10px;
    top: 2px;
    bottom: 2px;
    width: 2px;
    border-radius: 1px;
    background-color: var(--bn-accent);
  }
}

/* Table of contents: a hairline rail; the section in view is ink with the
   rail segment in the accent. */
.md-nav--secondary > .md-nav__title {
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bn-faint);
  box-shadow: none;
  background: transparent;
}
@media screen and (min-width: 60em) {
  .md-nav--secondary > .md-nav__list {
    border-left: 1px solid var(--bn-rule);
  }
  .md-nav--secondary .md-nav__link {
    position: relative;
    font-size: 13px;
    margin-top: 0;
    padding: 4px 0 4px 12px;
  }
  .md-nav--secondary .md-nav .md-nav__link {
    padding-left: 24px;
  }
  .md-nav--secondary .md-nav__link--active {
    font-weight: 500;
  }
  .md-nav--secondary .md-nav__link--active::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 4px;
    bottom: 4px;
    width: 1px;
    background-color: var(--bn-accent);
  }
  .md-nav--secondary .md-nav__list .md-nav__list {
    border-left: 0;
  }
}

/* Mobile drawer: page background, lock-up row on a hairline instead of
   Material's coloured band. */
@media screen and (max-width: 76.234375em) {
  .md-nav--primary,
  .md-nav--primary .md-nav {
    background-color: var(--bn-bg);
  }
  .md-nav--primary .md-nav__title {
    background-color: var(--bn-bg);
    color: var(--bn-ink);
    border-bottom: 1px solid var(--bn-rule);
    font-family: var(--bn-font-display);
    font-weight: 500;
    font-size: 20px;
    letter-spacing: -0.01em;
  }
  .md-nav--primary .md-nav__title .md-nav__icon {
    color: var(--bn-muted);
  }
  .md-nav--primary .md-nav__title[for="__drawer"] {
    background-color: var(--bn-bg);
    color: var(--bn-ink);
    border-bottom: 1px solid var(--bn-rule);
    font-family: var(--bn-font-display);
    font-weight: 500;
    font-size: 20px;
    text-transform: lowercase;
  }
  .md-nav--primary .md-nav__title .md-nav__button.md-logo img {
    height: 32px;
    width: auto;
  }
  .md-nav__source {
    background-color: var(--bn-surface);
    color: var(--bn-muted);
    border-bottom: 1px solid var(--bn-rule);
  }
  .md-nav--primary .md-nav__item {
    border-top: 0;
  }
  .md-nav--primary .md-nav__link {
    margin-top: 0;
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .md-nav--primary .md-nav__item--section > .md-nav__link {
    margin-top: var(--bn-space-4);
  }
}

/* Footer: page background with one hairline above, as on the website. */
.md-footer {
  background-color: var(--bn-bg);
  color: var(--bn-ink);
  border-top: 1px solid var(--bn-rule);
}
.md-footer__link {
  color: var(--bn-muted);
  opacity: 1;
  transition: color var(--bn-dur-2) ease-out;
}
.md-footer__link:hover,
.md-footer__link:focus-visible {
  color: var(--bn-ink);
  opacity: 1;
}
.md-footer__direction {
  font-family: var(--bn-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bn-faint);
  opacity: 1;
}
.md-footer__title .md-ellipsis {
  font-family: var(--bn-font-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.md-footer-meta {
  background-color: var(--bn-bg);
  border-top: 1px solid var(--bn-rule);
}
.md-footer-meta.md-typeset a {
  color: var(--bn-muted);
}
.md-footer-meta.md-typeset a:hover {
  color: var(--bn-ink);
}
.md-copyright {
  color: var(--bn-faint);
  font-size: 13px;
}
.md-social__link {
  color: var(--bn-muted);
}
.md-social__link:hover {
  color: var(--bn-ink);
}

/* Back-to-top and the instant-loading progress bar. */
.md-top {
  background-color: var(--bn-surface);
  color: var(--bn-ink);
  border: 1px solid var(--bn-rule);
  box-shadow: none;
  font-size: 13px;
}
.md-top:hover,
.md-top:focus-visible {
  background-color: var(--bn-surface);
  color: var(--bn-ink);
  border-color: var(--bn-rule-strong);
}
.md-progress {
  background-color: var(--bn-accent);
}

/* ===================================================================
 * 4. Content
 * =================================================================== */

.md-grid {
  max-width: 1320px;
}

.md-typeset {
  font-size: 16px;
  line-height: 1.7;
  color: var(--bn-ink);
}
.md-typeset p,
.md-typeset li {
  text-wrap: pretty;
}
.md-typeset strong {
  font-weight: 600;
}

/* Headings: the display serif at weight 500 with tight tracking, sized
   from the website's display and title steps. */
.md-typeset h1,
.md-typeset h2,
.md-typeset h3 {
  font-family: var(--bn-font-display);
  font-weight: 500;
  color: var(--bn-ink);
  text-wrap: balance;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}
.md-typeset h1 {
  font-size: clamp(32px, 22px + 1.6vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 var(--bn-space-5);
}
.md-typeset h2 {
  font-size: clamp(24px, 21px + 0.6vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.014em;
  margin: var(--bn-space-7) 0 var(--bn-space-3);
  padding-top: var(--bn-space-5);
  border-top: 1px solid var(--bn-rule);
}
.md-typeset h1 + h2,
.md-typeset hr + h2,
.md-typeset .bn-hero + figure + h2 {
  border-top: 0;
  padding-top: 0;
}
.md-typeset h3 {
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: var(--bn-space-6) 0 var(--bn-space-2);
}
.md-typeset h4,
.md-typeset h5,
.md-typeset h6 {
  font-family: var(--bn-font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--bn-ink);
  text-transform: none;
  margin: var(--bn-space-5) 0 var(--bn-space-2);
}
.md-typeset .headerlink {
  color: var(--bn-rule-strong);
  font-family: var(--bn-font-body);
  font-weight: 400;
}
.md-typeset .headerlink:hover,
.md-typeset .headerlink:focus-visible,
.md-typeset :target > .headerlink {
  color: var(--bn-accent);
}

.md-typeset hr {
  border-bottom: 1px solid var(--bn-rule);
  margin: var(--bn-space-6) 0;
}

.md-typeset blockquote {
  border-left: 2px solid var(--bn-accent);
  color: var(--bn-muted);
  padding-left: var(--bn-space-4);
}

.md-typeset figcaption {
  max-width: 44rem;
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-style: normal;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--bn-faint);
}

.md-typeset img,
.md-typeset figure img {
  border-radius: var(--bn-radius);
}

/* Inline code: code paper with a hairline, 4px radius. */
.md-typeset code {
  font-size: 0.875em;
  border-radius: var(--bn-radius-sm);
}
.md-typeset :not(pre) > code {
  padding: 0.1em 0.35em;
  background-color: var(--bn-code-bg);
  border: 1px solid var(--bn-rule);
  color: var(--bn-ink);
  word-break: break-word;
}
.md-typeset h1 code,
.md-typeset h2 code,
.md-typeset h3 code {
  font-size: 0.8em;
}

/* Code blocks: code paper, hairline border, 8px radius, no shadow. */
.md-typeset pre {
  margin: var(--bn-space-5) 0;
}
.md-typeset pre > code {
  padding: var(--bn-space-4) var(--bn-space-5);
  font-size: 13px;
  line-height: 1.6;
  background-color: var(--bn-code-bg);
  border: 1px solid var(--bn-rule);
  border-radius: var(--bn-radius);
  box-shadow: none;
}
.md-typeset .highlight {
  border-radius: var(--bn-radius);
}
.md-typeset .highlight span.filename,
.md-typeset .highlighttable .filename {
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--bn-faint);
  background-color: var(--bn-surface);
  border: 1px solid var(--bn-rule);
  border-bottom: 0;
  border-radius: var(--bn-radius) var(--bn-radius) 0 0;
  padding: var(--bn-space-2) var(--bn-space-4);
}
.md-typeset .highlight span.filename + pre > code {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.md-typeset .highlight .hll {
  background-color: var(--bn-accent-tint);
  box-shadow: inset 2px 0 0 var(--bn-accent);
}
.md-typeset .highlighttable .linenos {
  background-color: var(--bn-code-bg);
  border-radius: var(--bn-radius) 0 0 var(--bn-radius);
}
.md-typeset .highlight .linenodiv pre,
.md-typeset .highlight [data-linenos]::before {
  color: var(--bn-faint);
  background-color: transparent;
  box-shadow: none;
}
.md-typeset .highlight .c,
.md-typeset .highlight .c1,
.md-typeset .highlight .ch,
.md-typeset .highlight .cm,
.md-typeset .highlight .cs {
  font-style: italic;
}

/* Copy button: quiet until hovered. */
.md-clipboard {
  color: var(--bn-faint);
  opacity: 1;
  transition: color var(--bn-dur-2) ease-out;
}
.md-clipboard:hover,
.md-clipboard:focus-visible,
.md-typeset .md-code__button:hover {
  color: var(--bn-accent);
}
.md-typeset .md-code__nav {
  background-color: transparent;
}

/* Keyboard keys. */
.md-typeset kbd {
  font-size: 0.8em;
  border-radius: var(--bn-radius-sm);
  color: var(--bn-ink);
}

/* Admonitions and details: surface card with a hairline and a 2px rail in
   the role colour. The title is ink UI text; the icon carries the role. */
.md-typeset .admonition,
.md-typeset details {
  --bn-role: var(--bn-accent);
  margin: var(--bn-space-5) 0;
  padding: 0 var(--bn-space-4);
  font-size: 15px;
  line-height: 1.6;
  background-color: var(--bn-surface);
  border: 1px solid var(--bn-rule);
  border-left: 2px solid var(--bn-role);
  border-radius: 0 var(--bn-radius) var(--bn-radius) 0;
  box-shadow: none;
  color: var(--bn-ink);
}
.md-typeset .admonition > .admonition-title,
.md-typeset details > summary {
  margin: 0 calc(-1 * var(--bn-space-4));
  padding: var(--bn-space-3) var(--bn-space-4) var(--bn-space-2) 44px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.003em;
  color: var(--bn-ink);
  background-color: transparent;
  border: 0;
}
.md-typeset .admonition > .admonition-title::before,
.md-typeset details > summary::before {
  left: var(--bn-space-4);
  top: 14px;
  width: 18px;
  height: 18px;
  background-color: var(--bn-role);
}
.md-typeset .admonition > .admonition-title::after,
.md-typeset details > summary::after {
  color: var(--bn-muted);
  top: 14px;
}
.md-typeset details:not([open]) > summary {
  padding-bottom: var(--bn-space-3);
}
.md-typeset .admonition > :last-child,
.md-typeset details > :last-child {
  margin-bottom: var(--bn-space-4);
}
.md-typeset .admonition pre > code,
.md-typeset details pre > code {
  background-color: var(--bn-bg);
}
/* Accent text on the admonition surface uses the darker accent step,
   which clears 4.5:1 there (the canonical accent measures 4.25:1). */
.md-typeset .admonition a:hover,
.md-typeset details a:hover {
  color: var(--bn-accent-ink);
  text-decoration-color: var(--bn-accent-ink);
}

/* Role colours. The site defines no info token, so the informational
   kinds use the accent and the neutral kinds use muted. */
.md-typeset :is(.admonition, details):is(.note, .info, .todo, .abstract, .summary, .tldr) {
  --bn-role: var(--bn-accent);
  border-color: var(--bn-rule);
  border-left-color: var(--bn-role);
}
.md-typeset :is(.admonition, details):is(.tip, .hint, .important, .success, .check, .done) {
  --bn-role: var(--bn-success);
  border-color: var(--bn-rule);
  border-left-color: var(--bn-role);
}
.md-typeset :is(.admonition, details):is(.warning, .caution, .attention, .question, .help, .faq) {
  --bn-role: var(--bn-warning);
  border-color: var(--bn-rule);
  border-left-color: var(--bn-role);
}
.md-typeset :is(.admonition, details):is(.danger, .error, .failure, .fail, .missing, .bug) {
  --bn-role: var(--bn-danger);
  border-color: var(--bn-rule);
  border-left-color: var(--bn-role);
}
.md-typeset :is(.admonition, details):is(.example, .quote, .cite) {
  --bn-role: var(--bn-muted);
  border-color: var(--bn-rule);
  border-left-color: var(--bn-role);
}

/* Tables: no outer box, no zebra. Mono uppercase header row in the faint
   ink, hairlines between rows, numbers aligned. */
.md-typeset table:not([class]) {
  font-size: 14px;
  line-height: 1.5;
  background-color: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  font-variant-numeric: tabular-nums;
}
.md-typeset table:not([class]) th {
  min-width: 0;
  padding: var(--bn-space-2) var(--bn-space-3);
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bn-faint);
  background-color: transparent;
  border-bottom: 1px solid var(--bn-rule-strong);
  vertical-align: bottom;
}
.md-typeset table:not([class]) td {
  padding: var(--bn-space-2) var(--bn-space-3);
  border-top: 1px solid var(--bn-rule);
  vertical-align: top;
}
.md-typeset table:not([class]) td:has(> img:only-child) {
  vertical-align: middle;
}
.md-typeset table:not([class]) tbody tr:first-child td {
  border-top: 0;
}
.md-typeset table:not([class]) tbody tr {
  transition: background-color var(--bn-dur-1) ease-out;
}
.md-typeset table:not([class]) tbody tr:hover {
  background-color: var(--bn-surface);
  box-shadow: none;
}
.md-typeset table:not([class]) th:first-child,
.md-typeset table:not([class]) td:first-child {
  padding-left: 0;
}
.md-typeset table:not([class]) tbody tr:hover td:first-child {
  padding-left: 0;
}
.md-typeset__scrollwrap {
  margin: var(--bn-space-4) 0;
}

/* Content tabs: UI labels in muted ink; the active label is ink with the
   accent indicator on a hairline. */
.md-typeset .tabbed-set {
  margin: var(--bn-space-5) 0;
  border-radius: 0;
}
.md-typeset .tabbed-labels {
  box-shadow: inset 0 -1px 0 var(--bn-rule);
}
.md-typeset .tabbed-labels > label {
  padding: var(--bn-space-2) var(--bn-space-4) 10px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.003em;
  color: var(--bn-muted);
  border-bottom: 0;
  transition: color var(--bn-dur-2) ease-out;
}
.md-typeset .tabbed-labels > label:hover {
  color: var(--bn-ink);
}
.md-typeset .tabbed-set > input:checked + label,
.md-typeset .tabbed-labels > label.tabbed-labels__active {
  color: var(--bn-ink);
}
.js .md-typeset .tabbed-labels::before {
  height: 2px;
  background-color: var(--bn-accent);
}
.md-typeset .tabbed-content > .tabbed-block > .highlight:first-child > pre {
  margin-top: var(--bn-space-3);
}
.md-typeset .tabbed-button {
  color: var(--bn-muted);
}
.md-typeset .tabbed-button:hover {
  background-color: var(--bn-surface);
  color: var(--bn-ink);
}

/* Grid cards: surface panel, hairline, 12px radius; hover raises the
   border to the strong rule. No shadow, no lift. */
.md-typeset .grid {
  grid-gap: var(--bn-space-4);
}
.md-typeset .grid.cards > ul > li,
.md-typeset .grid > .card {
  padding: var(--bn-space-5);
  background-color: var(--bn-surface);
  border: 1px solid var(--bn-rule);
  border-radius: var(--bn-radius-lg);
  box-shadow: none;
  transition: border-color var(--bn-dur-2) ease-out;
}
.md-typeset .grid.cards > ul > li:hover,
.md-typeset .grid > .card:hover,
.md-typeset .grid.cards > ul > li:focus-within,
.md-typeset .grid > .card:focus-within {
  border-color: var(--bn-rule-strong);
  box-shadow: none;
}
.md-typeset .grid.cards > ul > li > hr,
.md-typeset .grid > .card > hr {
  margin: var(--bn-space-3) 0;
  border-bottom-color: var(--bn-rule);
}
.md-typeset .grid.cards > ul > li > p:first-child strong,
.md-typeset .grid > .card > p:first-child strong {
  font-family: var(--bn-font-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.md-typeset .grid.cards .twemoji,
.md-typeset .grid.cards .md-icon {
  color: var(--bn-accent);
}
.md-typeset .grid.cards > ul > li > p,
.md-typeset .grid.cards > ul > li > :not(p:first-child) {
  font-size: 15px;
  line-height: 1.6;
}

/* Buttons: the website's primary (ink fill) and secondary (hairline). */
.md-typeset .md-button {
  display: inline-flex;
  align-items: center;
  gap: var(--bn-space-2);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.3;
  color: var(--bn-ink);
  background-color: transparent;
  border: 1px solid var(--bn-rule-strong);
  border-radius: var(--bn-radius);
  transition: background-color var(--bn-dur-2) ease-out, border-color var(--bn-dur-2) ease-out, color var(--bn-dur-2) ease-out;
}
.md-typeset .md-button:hover,
.md-typeset .md-button:focus-visible {
  color: var(--bn-ink);
  background-color: var(--bn-surface);
  border-color: var(--bn-ink);
}
.md-typeset .md-button--primary {
  color: var(--bn-bg);
  background-color: var(--bn-ink);
  border-color: var(--bn-ink);
}
.md-typeset .md-button--primary:hover,
.md-typeset .md-button--primary:focus-visible {
  color: var(--bn-bg);
  background-color: var(--bn-accent);
  border-color: var(--bn-accent);
}
[data-md-color-scheme="default"] .md-typeset .md-button--primary:hover,
[data-md-color-scheme="default"] .md-typeset .md-button--primary:focus-visible {
  background-color: var(--bn-accent-ink);
  border-color: var(--bn-accent-ink);
}

/* Page action icons (edit on GitHub) stay quiet. */
.md-content__button {
  color: var(--bn-faint);
}
.md-content__button:hover {
  color: var(--bn-ink);
}

/* Feedback widget and tags. */
.md-feedback__icon:not(:disabled):hover {
  color: var(--bn-accent);
}
.md-typeset .md-tag {
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--bn-muted);
  background-color: var(--bn-surface);
  border: 1px solid var(--bn-rule);
  border-radius: var(--bn-radius-sm);
}

/* Announcement bar. */
.md-banner {
  background-color: var(--bn-surface);
  color: var(--bn-ink);
  border-bottom: 1px solid var(--bn-rule);
}

/* Cookie consent: page background on a hairline, the site's buttons. */
.md-consent__inner {
  background-color: var(--bn-bg);
  border-top: 1px solid var(--bn-rule);
  box-shadow: 0 -6px 16px rgba(24, 22, 20, 0.06);
}
.md-consent__overlay {
  background-color: rgba(19, 19, 15, 0.45);
  backdrop-filter: none;
}
.md-consent .md-typeset h4 {
  margin-top: 0;
}

/* Mermaid diagrams inherit the palette. */
.mermaid {
  --md-mermaid-font-family: var(--bn-font-body);
  --md-mermaid-edge-color: var(--bn-muted);
  --md-mermaid-node-bg-color: var(--bn-surface);
  --md-mermaid-node-fg-color: var(--bn-ink);
  --md-mermaid-label-bg-color: var(--bn-bg);
  --md-mermaid-label-fg-color: var(--bn-ink);
}

/* ===================================================================
 * 5. Search
 * =================================================================== */

.md-search__form {
  background-color: var(--bn-surface);
  border: 1px solid var(--bn-rule);
  border-radius: var(--bn-radius);
  box-shadow: none;
  transition: border-color var(--bn-dur-2) ease-out, background-color var(--bn-dur-2) ease-out;
}
.md-search__form:hover {
  background-color: var(--bn-surface);
  border-color: var(--bn-rule-strong);
}
.md-search__input,
.md-search__suggest {
  font-family: var(--bn-font-body);
  font-size: 14px;
  color: var(--bn-ink);
  background: transparent;
}
.md-search__input::placeholder {
  color: var(--bn-faint);
}
.md-search__input + .md-search__icon,
.md-search__icon {
  color: var(--bn-faint);
}
.md-search__input:focus-visible {
  outline: none;
}
.md-search__form:focus-within {
  border-color: var(--bn-accent);
  box-shadow: 0 0 0 1px var(--bn-accent);
}
[data-md-toggle="search"]:checked ~ .md-header .md-search__form {
  background-color: var(--bn-bg);
  border-color: var(--bn-accent);
  border-radius: var(--bn-radius) var(--bn-radius) 0 0;
}
.md-search__output {
  border-radius: 0 0 var(--bn-radius) var(--bn-radius);
}
.md-search__scrollwrap {
  background-color: var(--bn-bg);
}
@media screen and (min-width: 60em) {
  .md-search__output {
    border: 1px solid var(--bn-rule);
    border-top: 0;
    box-shadow: var(--bn-shadow-pop);
  }
}
.md-search-result {
  color: var(--bn-ink);
}
.md-search-result__meta {
  font-family: var(--bn-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bn-faint);
  background-color: var(--bn-surface);
  border-bottom: 1px solid var(--bn-rule);
}
.md-search-result__item {
  box-shadow: 0 -1px var(--bn-rule);
}
.md-search-result__link:hover,
.md-search-result__link:focus,
.md-search-result__more > summary:hover,
.md-search-result__more > summary:focus {
  background-color: var(--bn-surface);
}
.md-search-result__article h1 {
  font-family: var(--bn-font-display);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--bn-ink);
}
.md-search-result__article h2 {
  font-family: var(--bn-font-body);
  font-weight: 600;
  font-size: 14px;
  border-top: 0;
  padding-top: 0;
  margin: 0;
}
.md-search-result__teaser {
  color: var(--bn-muted);
}
.md-search-result mark,
.md-search-result__teaser mark {
  color: var(--bn-ink);
  background-color: var(--bn-accent-tint);
  text-decoration: underline;
  text-decoration-color: var(--bn-accent);
  text-underline-offset: 0.15em;
}
.md-search-result__icon {
  color: var(--bn-faint);
}
.md-search__suggest {
  color: var(--bn-faint);
}
.md-search__options > .md-icon {
  color: var(--bn-faint);
}
.md-search__options > .md-icon:hover {
  color: var(--bn-ink);
}

/* ===================================================================
 * 6. Home page (docs/index.md)
 * =================================================================== */

.md-typeset .bn-hero {
  margin: var(--bn-space-2) 0 var(--bn-space-7);
}
.md-typeset .bn-eyebrow {
  margin: 0 0 var(--bn-space-4);
  font-family: var(--bn-font-mono);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bn-faint);
}
.md-typeset .bn-hero h1 {
  max-width: 18ch;
  margin: 0 0 var(--bn-space-4);
  font-size: clamp(36px, 22px + 3vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  font-weight: 400;
}
.md-typeset .bn-hero h1 em {
  font-style: italic;
  color: var(--bn-accent);
}
.md-typeset .bn-lede {
  max-width: 62ch;
  margin: 0 0 var(--bn-space-5);
  font-size: 17px;
  line-height: 1.6;
  color: var(--bn-muted);
}
.md-typeset .bn-actions,
.md-typeset .bn-actions > p {
  display: flex;
  flex-wrap: wrap;
  gap: var(--bn-space-3);
  margin: 0;
}
.md-typeset .bn-actions > p {
  flex: 1 1 100%;
}
.md-typeset .bn-actions .md-button {
  margin: 0;
}
.md-typeset .bn-hero + hr {
  display: none;
}

/* The demo recording and the two surface renders are the page's evidence:
   framed like the website's panels. */
.md-typeset .bn-proof img,
.md-typeset .bn-hero ~ figure img {
  border: 1px solid var(--bn-rule);
  border-radius: var(--bn-radius-lg);
}
.md-typeset .bn-hero ~ figure {
  margin: 0 0 var(--bn-space-7);
}

@media screen and (max-width: 44.984375em) {
  /* Material bleeds top-level code blocks to the screen edge here. */
  .md-content__inner > pre > code,
  .md-content__inner > .highlight > pre > code,
  .md-content__inner > .highlight > .filename,
  .md-content__inner > .tabbed-set pre > code {
    border-left: 0;
    border-right: 0;
    border-radius: 0;
  }
  .md-typeset .bn-hero {
    margin-bottom: var(--bn-space-6);
  }
  .md-typeset .bn-actions .md-button {
    flex: 1 1 100%;
    justify-content: center;
  }
}

/* ===================================================================
 * 7. Reduced motion, print
 * =================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  .md-typeset a {
    text-decoration: none;
  }
  .md-typeset h2 {
    border-top: 0;
  }
}