/**
 * jQuery Form Validator — documentation site
 *
 * Design direction: Minimalism & Swiss Style, which is the matched style for
 * documentation sites — grid-based, strong type hierarchy, one accent colour,
 * decoration kept out of the way of the content. Structure carries the design;
 * borders do the work shadows would otherwise do.
 *
 * Palette: the "Knowledge Base / Documentation" scheme (neutral slate plus a
 * link blue) for light, and the "Developer Tool / IDE" scheme for dark, so the
 * two themes read as one system rather than two.
 *
 * No build step and no framework: plain CSS custom properties, so the files in
 * this folder can be opened directly, served from GitHub Pages, or dropped on
 * any static host without anything being compiled first.
 */

/* ------------------------------------------------------------------ *
 * Fonts
 *
 * Self-hosted, latin subset, so the site stays self-contained and makes no
 * network request. Both are SIL OFL 1.1 — see assets/fonts/LICENSE.md.
 * ------------------------------------------------------------------ */

@font-face {
  font-family: 'Inter Variable';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/inter-variable.woff2') format('woff2-variations');
}

@font-face {
  font-family: 'JetBrains Mono Variable';
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url('../fonts/jetbrains-mono-variable.woff2') format('woff2-variations');
}

/* ------------------------------------------------------------------ *
 * Tokens
 * ------------------------------------------------------------------ */

:root {
  --font-sans: 'Inter Variable', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono Variable', ui-monospace, SFMono-Regular, 'SF Mono',
    Menlo, Consolas, 'Liberation Mono', monospace;

  /* A single spacing scale. Every gap in the layout is one of these. */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Light: Knowledge Base / Documentation */
  --bg: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-sunken: #f1f5f9;   /* lighter than the palette's muted, so accent-on-code clears 4.5:1 */
  --bg-code: #f8fafc;
  --bg-elevated: #ffffff;

  --text: #1e293b;
  --text-muted: #475569;
  --text-faint: #64748b;

  --border: #e2e8f0;
  --border-strong: #cbd5e1;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-subtle: #eff6ff;
  --accent-border: #bfdbfe;

  --ok: #15803d;
  --ok-subtle: #f0fdf4;
  --ok-border: #bbf7d0;

  --warn: #b45309;
  --warn-subtle: #fffbeb;
  --warn-border: #fde68a;

  --danger: #b91c1c;   /* palette says #dc2626; that is 4.41:1 on --danger-subtle, so darkened */
  --danger-subtle: #fef2f2;
  --danger-border: #fecaca;

  /* Swiss style leans on structure rather than elevation. Shadows appear only
   * where something genuinely floats above the page. */
  --shadow-overlay: 0 8px 28px rgba(15, 23, 42, .12), 0 2px 6px rgba(15, 23, 42, .06);

  --sidebar-w: 260px;
  --toc-w: 216px;
  --header-h: 56px;
  --radius: 6px;
  --radius-sm: 4px;
  --content-max: 820px;
}

/* Dark: Developer Tool / IDE. The media query is the default and [data-theme]
 * lets the toggle override whichever way the OS is set. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f172a;
    --bg-subtle: #151e32;
    --bg-sunken: #272f42;
    --bg-code: #131c2f;
    --bg-elevated: #1b2336;

    --text: #f8fafc;
    --text-muted: #cbd5e1;
    --text-faint: #94a3b8;

    --border: #2b3a52;
    --border-strong: #475569;

    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-subtle: #17233d;
    --accent-border: #2f4a77;

    --ok: #4ade80;
    --ok-subtle: #10251a;
    --ok-border: #1f4d31;

    --warn: #fbbf24;
    --warn-subtle: #2a2110;
    --warn-border: #5a451a;

    --danger: #f87171;
    --danger-subtle: #2a1618;
    --danger-border: #5c2427;

    --shadow-overlay: 0 8px 28px rgba(0, 0, 0, .55), 0 2px 6px rgba(0, 0, 0, .4);
  }
}

:root[data-theme="dark"] {
  --bg: #0f172a;
  --bg-subtle: #151e32;
  --bg-sunken: #272f42;
  --bg-code: #131c2f;
  --bg-elevated: #1b2336;

  --text: #f8fafc;
  --text-muted: #cbd5e1;
  --text-faint: #94a3b8;

  --border: #2b3a52;
  --border-strong: #475569;

  --accent: #60a5fa;
  --accent-hover: #93c5fd;
  --accent-subtle: #17233d;
  --accent-border: #2f4a77;

  --ok: #4ade80;
  --ok-subtle: #10251a;
  --ok-border: #1f4d31;

  --warn: #fbbf24;
  --warn-subtle: #2a2110;
  --warn-border: #5a451a;

  --danger: #f87171;
  --danger-subtle: #2a1618;
  --danger-border: #5c2427;

  --shadow-overlay: 0 8px 28px rgba(0, 0, 0, .55), 0 2px 6px rgba(0, 0, 0, .4);
}

/* ------------------------------------------------------------------ *
 * Base
 * ------------------------------------------------------------------ */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--space-4));
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  font-feature-settings: 'cv05' 1, 'cv11' 1;   /* Inter: single-storey l, humanist a */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .15s ease;
}
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* A link inside a block of text cannot be distinguished by colour alone — the
 * contrast between link and body text is below 3:1 — so prose links are
 * underlined. Navigation, cards and buttons are distinguishable by position. */
.content p a,
.content li a,
.content td a,
.callout a {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}
.content .card-grid a { text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

hr { border: 0; border-top: 1px solid var(--border); margin: var(--space-7) 0; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--accent);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  border-radius: 0 0 var(--radius) 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; color: #fff; text-decoration: none; }

/* Icons ------------------------------------------------------------ */

.icon {
  width: 1em;
  height: 1em;
  flex: none;
  display: inline-block;
  vertical-align: -.125em;
  fill: currentColor;
}

/* ------------------------------------------------------------------ *
 * Header
 * ------------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 0 var(--space-5);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

@supports not (background: color-mix(in srgb, red 50%, blue)) {
  .site-header { background: var(--bg); }
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 620;
  font-size: 15px;
  letter-spacing: -.011em;
  color: var(--text);
  white-space: nowrap;
}
.brand:hover { text-decoration: none; color: var(--text); }

.brand-mark {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  flex: none;
  font-size: 15px;
}

.version-badge {
  font: 500 11px/1 var(--font-mono);
  padding: 4px 7px;
  border-radius: var(--radius-sm);
  background: var(--bg-sunken);
  color: var(--text-muted);
  border: 1px solid var(--border);
  letter-spacing: -.01em;
}

.header-spacer { flex: 1; }
.header-actions { display: flex; align-items: center; gap: var(--space-2); }

.icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 16px;
  padding: 0;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.icon-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--bg-subtle);
}

.header-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px var(--space-3);
  border-radius: var(--radius);
  transition: color .15s ease, background .15s ease;
}
.header-link:hover {
  color: var(--text);
  background: var(--bg-subtle);
  text-decoration: none;
}

.nav-toggle { display: none; }

/* The theme toggle carries both icons and CSS reveals the relevant one, so
 * the script never has to rewrite SVG markup to switch them. */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ------------------------------------------------------------------ *
 * Search
 * ------------------------------------------------------------------ */

.search { position: relative; width: 248px; }

.search input {
  width: 100%;
  height: 34px;
  padding: 0 var(--space-3) 0 32px;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}
.search input::placeholder { color: var(--text-faint); }
.search input:focus {
  background: var(--bg);
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  color: var(--text-faint);
  pointer-events: none;
  fill: currentColor;
}

.search-results {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  right: 0;
  max-height: 62vh;
  overflow-y: auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-overlay);
  padding: var(--space-1);
  display: none;
}
.search-results.open { display: block; }
.search-results ul { margin: 0; padding: 0; }
.search-results li { list-style: none; }

.search-results a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
}
.search-results a:hover,
.search-results a.active {
  background: var(--accent-subtle);
  color: var(--accent);
  text-decoration: none;
}
.search-results .r-page {
  display: block;
  font: 400 11px/1.5 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-faint);
  margin-top: 1px;
}
.search-empty {
  padding: var(--space-4) var(--space-3);
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
}

/* ------------------------------------------------------------------ *
 * Layout
 * ------------------------------------------------------------------ */

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  align-items: start;
  max-width: 1400px;
  margin: 0 auto;
}
.layout.with-toc {
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
}

/* Sidebar ---------------------------------------------------------- */

.sidebar {
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: var(--space-6) var(--space-3) var(--space-8) var(--space-5);
  border-right: 1px solid var(--border);
}

.sidebar h2 {
  font: 600 11px/1 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-faint);
  margin: var(--space-6) 0 var(--space-2) var(--space-3);
  font-weight: 600;
}
.sidebar h2:first-child { margin-top: 0; }

.sidebar ul { list-style: none; margin: 0; padding: 0; }

.sidebar a {
  display: block;
  padding: 6px var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.45;
  border-left: 2px solid transparent;
  transition: color .15s ease, background .15s ease;
}
.sidebar a:hover {
  color: var(--text);
  background: var(--bg-subtle);
  text-decoration: none;
}
.sidebar a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-subtle);
  border-left-color: var(--accent);
  font-weight: 600;
}

/* Content ---------------------------------------------------------- */

.content { min-width: 0; padding: var(--space-7) var(--space-7) var(--space-8); }
.content-inner { max-width: var(--content-max); }

/* On this page ----------------------------------------------------- */

.toc {
  position: sticky;
  top: var(--header-h);
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: var(--space-7) var(--space-5) var(--space-8) var(--space-1);
  font-size: 13.5px;
}
.toc h2 {
  font: 600 11px/1 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-faint);
  margin: 0 0 var(--space-3);
}
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc a {
  display: block;
  padding: 5px var(--space-3);
  color: var(--text-muted);
  border-left: 2px solid var(--border);
  line-height: 1.45;
  transition: color .15s ease, border-color .15s ease;
}
.toc a:hover { color: var(--text); text-decoration: none; border-left-color: var(--border-strong); }
.toc a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 550;
}
.toc .toc-h3 { padding-left: var(--space-6); font-size: 13px; }

/* ------------------------------------------------------------------ *
 * Typography
 *
 * Swiss style puts the hierarchy in the type, so the steps are decisive and
 * the tracking tightens as the size grows.
 * ------------------------------------------------------------------ */

.content h1 {
  font-size: 36px;
  line-height: 1.15;
  letter-spacing: -.032em;
  margin: 0 0 var(--space-3);
  font-weight: 680;
}

.content h2 {
  font-size: 23px;
  line-height: 1.3;
  letter-spacing: -.021em;
  margin: var(--space-8) 0 var(--space-4);
  padding-top: var(--space-5);
  font-weight: 640;
  border-top: 1px solid var(--border);
}
.content h2:first-of-type { border-top: 0; padding-top: 0; margin-top: var(--space-7); }

.content h3 {
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -.012em;
  margin: var(--space-6) 0 var(--space-3);
  font-weight: 620;
}

.content h4 {
  font-size: 14.5px;
  margin: var(--space-5) 0 var(--space-2);
  font-weight: 620;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.content p { margin: 0 0 var(--space-4); }
.content ul, .content ol { margin: 0 0 var(--space-4); padding-left: var(--space-5); }
.content li { margin-bottom: var(--space-1); }
.content li > ul, .content li > ol { margin-top: var(--space-1); }
.content li::marker { color: var(--text-faint); }

.lede {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: var(--space-6);
  letter-spacing: -.008em;
  text-wrap: pretty;
}

.anchor {
  opacity: 0;
  margin-left: var(--space-2);
  font-weight: 400;
  color: var(--text-faint);
  font-size: .8em;
  text-decoration: none;
  transition: opacity .15s ease;
}
h2:hover .anchor, h3:hover .anchor, .anchor:focus { opacity: 1; }

/* ------------------------------------------------------------------ *
 * Code
 * ------------------------------------------------------------------ */

code {
  font-family: var(--font-mono);
  font-size: .875em;
  /* Explicit rather than inherited: inline code inside muted or faint text
   * would otherwise carry that colour onto the code background and fall
   * below the contrast threshold. */
  color: var(--text);
  background: var(--bg-sunken);
  padding: .12em .36em;
  border-radius: var(--radius-sm);
  word-break: break-word;
  font-feature-settings: 'liga' 0;   /* keep => and -> as written */
}

.code-block { position: relative; margin: 0 0 var(--space-5); }

.code-block .code-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  font: 500 11px/1 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-faint);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  padding: var(--space-2) var(--space-3);
  min-height: 34px;
}

.code-block pre {
  margin: 0;
  padding: var(--space-4);
  overflow-x: auto;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13.5px;
  line-height: 1.65;
  tab-size: 2;
}
.code-block .code-label + pre { border-radius: 0 0 var(--radius) var(--radius); }

a code { color: inherit; }   /* inside a link, follow the link */

.code-block pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  word-break: normal;
}

.copy-btn {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-muted);
  font: 500 11px/1 var(--font-sans);
  padding: 5px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  letter-spacing: 0;
  text-transform: none;
  transition: color .15s ease, border-color .15s ease;
}
.copy-btn:hover { color: var(--text); border-color: var(--border-strong); }
.copy-btn.copied { color: var(--ok); border-color: var(--ok-border); background: var(--ok-subtle); }

.code-block > .copy-btn.floating {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  opacity: 0;
  transition: opacity .15s ease;
}
.code-block:hover > .copy-btn.floating,
.code-block > .copy-btn.floating:focus { opacity: 1; }

/* Scrollable regions carry tabindex="0" so they can be reached by keyboard;
 * that needs a visible focus ring. */
.table-wrap:focus-visible,
.code-block pre:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Syntax tokens ---------------------------------------------------- */

.tok-comment { color: var(--text-faint); font-style: italic; }
.tok-string  { color: #0e7490; }
.tok-keyword { color: #7c3aed; font-weight: 550; }
.tok-number  { color: #b45309; }
.tok-tag     { color: #be123c; }
.tok-attr    { color: #7c3aed; }
.tok-fn      { color: #1d4ed8; }
.tok-doctype { color: var(--text-faint); }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tok-string  { color: #67e8f9; }
  :root:not([data-theme="light"]) .tok-keyword { color: #c4b5fd; }
  :root:not([data-theme="light"]) .tok-number  { color: #fcd34d; }
  :root:not([data-theme="light"]) .tok-tag     { color: #fda4af; }
  :root:not([data-theme="light"]) .tok-attr    { color: #c4b5fd; }
  :root:not([data-theme="light"]) .tok-fn      { color: #93c5fd; }
}
:root[data-theme="dark"] .tok-string  { color: #67e8f9; }
:root[data-theme="dark"] .tok-keyword { color: #c4b5fd; }
:root[data-theme="dark"] .tok-number  { color: #fcd34d; }
:root[data-theme="dark"] .tok-tag     { color: #fda4af; }
:root[data-theme="dark"] .tok-attr    { color: #c4b5fd; }
:root[data-theme="dark"] .tok-fn      { color: #93c5fd; }

/* ------------------------------------------------------------------ *
 * Tables
 * ------------------------------------------------------------------ */

.table-wrap {
  overflow-x: auto;
  margin: 0 0 var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table { width: 100%; border-collapse: collapse; font-size: 14.5px; }

th {
  text-align: left;
  font: 600 11.5px/1.4 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-faint);
  background: var(--bg-subtle);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--bg-subtle); }

td code, th code { white-space: nowrap; }

/* ------------------------------------------------------------------ *
 * Callouts
 * ------------------------------------------------------------------ */

.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--text-faint);
  background: var(--bg-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: var(--space-4) var(--space-5);
  margin: 0 0 var(--space-5);
}
.callout > :last-child { margin-bottom: 0; }
.callout .callout-title {
  font: 600 11.5px/1.4 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: var(--space-1);
  display: block;
}

.callout.note    { border-left-color: var(--accent); background: var(--accent-subtle); border-color: var(--accent-border); }
.callout.note .callout-title { color: var(--accent); }

.callout.tip     { border-left-color: var(--ok); background: var(--ok-subtle); border-color: var(--ok-border); }
.callout.tip .callout-title { color: var(--ok); }

.callout.warning { border-left-color: var(--warn); background: var(--warn-subtle); border-color: var(--warn-border); }
.callout.warning .callout-title { color: var(--warn); }

.callout.danger  { border-left-color: var(--danger); background: var(--danger-subtle); border-color: var(--danger-border); }
.callout.danger .callout-title { color: var(--danger); }

/* ------------------------------------------------------------------ *
 * Home page
 * ------------------------------------------------------------------ */

.hero { padding: var(--space-5) 0 0; }
.hero h1 {
  font-size: 46px;
  letter-spacing: -.038em;
  line-height: 1.08;
  margin-bottom: var(--space-4);
  font-weight: 700;
  text-wrap: balance;
}
.hero .lede { font-size: 19px; max-width: 40em; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-6) 0 var(--space-7);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px var(--space-5);
  border-radius: var(--radius);
  font-weight: 560;
  font-size: 14.5px;
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 42px;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover { text-decoration: none; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-secondary:hover { background: var(--bg-subtle); color: var(--text); border-color: var(--text-faint); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(232px, 1fr));
  gap: var(--space-4);
  margin: 0 0 var(--space-6);
}

.card {
  display: block;
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  color: var(--text);
  transition: border-color .15s ease, background .15s ease;
}
a.card:hover {
  border-color: var(--accent);
  text-decoration: none;
  color: var(--text);
  background: var(--bg-subtle);
}
.card h3 { margin: 0 0 var(--space-1); font-size: 15.5px; font-weight: 620; letter-spacing: -.01em; }
.card p { margin: 0; font-size: 14px; color: var(--text-muted); line-height: 1.55; }

.card-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}
.card-icon .icon { width: 17px; height: 17px; }

/* ------------------------------------------------------------------ *
 * Live demos
 * ------------------------------------------------------------------ */

.demo {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 0 0 var(--space-5);
  overflow: hidden;
  background: var(--bg-elevated);
}

.demo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  font: 600 11.5px/1.4 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-faint);
}

.demo-live { padding: var(--space-5); }
.demo-live p { margin: 0 0 var(--space-4); }
.demo-live p:last-of-type { margin-bottom: 0; }

.demo-live label {
  display: block;
  font-size: 13.5px;
  font-weight: 560;
  margin-bottom: var(--space-1);
  color: var(--text);
}

.demo-live input[type="text"],
.demo-live input[type="email"],
.demo-live input[type="password"],
.demo-live input[type="url"],
.demo-live input[type="number"],
.demo-live input[type="tel"],
.demo-live input[type="date"],
.demo-live textarea,
.demo-live select {
  width: 100%;
  max-width: 400px;
  padding: 9px var(--space-3);
  font: inherit;
  font-size: 14.5px;
  color: var(--text);
  /* background-color, not the shorthand: the plugin theme puts a status icon
   * in background-image on .error / .valid fields, and the shorthand would
   * wipe it — losing the non-colour affordance the theme provides. */
  background-color: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  min-height: 40px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.demo-live textarea { min-height: 80px; }

.demo-live input:focus, .demo-live textarea:focus, .demo-live select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.demo-live button[type="submit"] {
  padding: 10px var(--space-5);
  font: inherit;
  font-size: 14.5px;
  font-weight: 560;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-height: 42px;
  transition: background .15s ease;
}
.demo-live button[type="submit"]:hover { background: var(--accent-hover); }
.demo-live button[type="submit"]:disabled { opacity: .5; cursor: not-allowed; }

.demo-live .form-error { font-size: 13px; }

.demo-note {
  font-size: 13.5px;
  color: var(--text-muted);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  margin: 0;
}

.demo-result {
  font-size: 13.5px;
  font-weight: 500;
  padding: var(--space-3) var(--space-4);
  margin: 0;
  border-top: 1px solid var(--border);
  display: none;
}
.demo-result.show { display: block; }
.demo-result.pass { background: var(--ok-subtle); color: var(--ok); }
.demo-result.fail { background: var(--danger-subtle); color: var(--danger); }

/* ------------------------------------------------------------------ *
 * Misc
 * ------------------------------------------------------------------ */

.pill {
  display: inline-block;
  font: 500 11.5px/1.6 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 1px 7px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  background: var(--bg-subtle);
  vertical-align: middle;
  white-space: nowrap;
}
.pill.core { color: var(--accent); background: var(--accent-subtle); border-color: var(--accent-border); }
.pill.new  { color: var(--ok); background: var(--ok-subtle); border-color: var(--ok-border); }
.pill.dep  { color: var(--warn); background: var(--warn-subtle); border-color: var(--warn-border); }
.pill.net  { color: var(--danger); background: var(--danger-subtle); border-color: var(--danger-border); }

.filter-bar {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 var(--space-5);
  padding: var(--space-4);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.filter-bar input {
  flex: 1;
  min-width: 200px;
  height: 38px;
  padding: 0 var(--space-3);
  font: inherit;
  font-size: 14.5px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
}
.filter-bar input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}
.filter-count {
  font: 500 12.5px/1 var(--font-mono);
  color: var(--text-faint);
  white-space: nowrap;
}

.validator {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  margin: 0 0 var(--space-3);
  background: var(--bg-elevated);
}
.validator.is-hidden { display: none; }
.validator h3 {
  margin: 0 0 var(--space-1);
  font-size: 16px;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.validator > p { margin: 0 0 var(--space-3); color: var(--text-muted); font-size: 14.5px; }
.validator .code-block { margin-bottom: 0; }
.validator .code-block + .code-block { margin-top: var(--space-2); }
.validator .table-wrap { margin-bottom: var(--space-3); }

.no-results {
  padding: var(--space-7);
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}

.page-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}
.page-nav a {
  flex: 1;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 48%;
  transition: border-color .15s ease, background .15s ease;
}
.page-nav a:hover { border-color: var(--accent); background: var(--bg-subtle); text-decoration: none; }
.page-nav .dir {
  display: block;
  font: 500 11px/1.6 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--text-faint);
  margin-bottom: 2px;
}
.page-nav .ttl { font-weight: 570; color: var(--text); font-size: 15px; }
.page-nav .next { text-align: right; margin-left: auto; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-6) var(--space-5);
  text-align: center;
  color: var(--text-muted);
  font-size: 13.5px;
}
.site-footer a { color: var(--text-muted); text-decoration: underline; }
.site-footer a:hover { color: var(--accent); }

/* ------------------------------------------------------------------ *
 * Responsive
 * ------------------------------------------------------------------ */

@media (max-width: 1180px) {
  .layout.with-toc { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .toc { display: none; }
}

@media (max-width: 860px) {
  .layout, .layout.with-toc { grid-template-columns: minmax(0, 1fr); }

  .nav-toggle { display: grid; }

  .sidebar {
    position: fixed;
    top: var(--header-h);
    left: 0;
    width: min(86vw, 312px);
    height: calc(100vh - var(--header-h));
    background: var(--bg);
    border-right: 1px solid var(--border);
    box-shadow: var(--shadow-overlay);
    transform: translateX(-102%);
    transition: transform .22s ease;
    z-index: 70;
  }
  .sidebar.open { transform: translateX(0); }

  .sidebar-backdrop {
    position: fixed;
    inset: var(--header-h) 0 0;
    background: rgba(15, 23, 42, .5);
    z-index: 65;
    display: none;
  }
  .sidebar-backdrop.open { display: block; }

  .content { padding: var(--space-5) var(--space-4) var(--space-8); }
  .hero h1 { font-size: 32px; }
  .hero .lede { font-size: 17px; }
  .content h1 { font-size: 27px; }
  .content h2 { font-size: 21px; margin-top: var(--space-7); }
  .search { width: 100%; max-width: 180px; }
  .header-link.hide-sm { display: none; }
  .page-nav { flex-direction: column; }
  .page-nav a { max-width: 100%; }
  .page-nav .next { text-align: left; }
}

@media (max-width: 480px) {
  .search { display: none; }
  .brand span.brand-text { display: none; }
  .site-header { padding: 0 var(--space-4); gap: var(--space-3); }
}

/* ------------------------------------------------------------------ *
 * Touch targets
 *
 * Compact controls are fine for a mouse but too small for a finger. These
 * only enlarge on coarse pointers, so the desktop density is untouched.
 * ------------------------------------------------------------------ */

@media (pointer: coarse) {
  .icon-btn {
    width: 44px;
    height: 44px;
  }

  .copy-btn {
    min-height: 44px;
    padding: 0 var(--space-4);
  }

  .code-block .code-label { min-height: 52px; }

  .code-block > .copy-btn.floating {
    /* No hover on touch, so it cannot be revealed on hover. */
    opacity: 1;
  }

  .sidebar a { padding-top: 10px; padding-bottom: 10px; }
  .toc a { padding-top: 9px; padding-bottom: 9px; }
  .header-link { padding-top: 11px; padding-bottom: 11px; }
}

/* ------------------------------------------------------------------ *
 * Print
 * ------------------------------------------------------------------ */

@media print {
  .site-header, .sidebar, .toc, .page-nav, .copy-btn, .sidebar-backdrop { display: none !important; }
  .layout, .layout.with-toc { grid-template-columns: 1fr; }
  .content { padding: 0; }
  .content-inner { max-width: none; }
  a { color: inherit; text-decoration: underline; }
  .code-block pre { white-space: pre-wrap; word-break: break-word; }
}