/* RisqBase Design System site — shared base.
   Token bindings mirror the system's own tokens — the site styles itself with what it documents. */

:root {
  /* Surfaces */
  --color-surface-default: #FFFFFF;
  --color-surface-subtle: #FAFAF9;
  --color-surface-muted: #F5F5F4;
  --color-surface-inverse: #1C1917;

  /* Text */
  --color-text-default: #292524;
  --color-text-subtle: #57534E; /* AAA text tier (PR-B): mirrors color.text.subtle stone-600 */
  --color-text-on-action: #FFFFFF;
  --color-text-on-inverse: #FFFFFF;
  --color-text-on-inverse-subtle: #A8A29E;

  /* Borders */
  --color-border-default: #E7E5E4;
  --color-border-subtle: #F5F5F4;
  --color-border-inverse: #44403C;
  --color-border-focus: #6366F1;

  /* Action — indigo-600 brand */
  --color-action-primary: #4F46E5;
  --color-action-primary-hover: #4338CA;
  --color-action-primary-subtle: #E0E7FF;

  /* Brand mark v3 (rev. A1) — mirrors color.brand.mark (tokens/semantic/color.tokens.json
     → indigo-700; deliberately diverges from action-primary). Keep in sync with the token. */
  --color-header-logo: #4338CA;

  /* Iris teal — system signature accent */
  --color-iris: #0D9488;
  --color-iris-subtle: #CCFBF1;

  /* Spacing rhythm */
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-6: 24px; --space-8: 32px; --space-12: 48px; --space-16: 64px;

  /* Radius */
  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 12px; --radius-xl: 16px; --radius-full: 9999px;

  /* Typography */
  --font-sans: "Geist", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, "JetBrains Mono", monospace;

  /* Layout */
  --nav-w: 256px;
  --content-max: 768px;
  --container-max: 1280px;
}

/* ── Dark theme (v4.4 B4 — values mirror the dark token set) ── */
[data-theme="dark"] {
  --color-surface-default: #101214;
  --color-surface-subtle: #1A1D1F;
  --color-surface-muted: #212528;
  --color-surface-inverse: #F3F5F7;

  --color-text-default: #E3E7E9;
  --color-text-subtle: #A2A7AB;
  --color-text-on-action: #FFFFFF;
  --color-text-on-inverse: #101214;
  --color-text-on-inverse-subtle: #4C5054;

  --color-border-default: #5E6266;
  --color-border-subtle: #3B3D3F;
  --color-border-inverse: #D1D5D7;
  --color-border-focus: #818CF8;

  --color-action-primary: #4768DB;
  --color-action-primary-hover: #678AF6;
  --color-action-primary-subtle: #182241;

  --color-header-logo: #A5B4FC; /* mirrors color.brand.mark dark override (indigo-300) */

  --color-iris: #1E9B8F;
  --color-iris-subtle: #16302E;
}

.theme-toggle {
  margin-left: var(--space-3);
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-subtle);
  cursor: pointer;
  font-size: 14px; line-height: 1;
}
.theme-toggle:hover { color: var(--color-text-default); border-color: var(--color-text-subtle); }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 16px/1.55 var(--font-sans);
  color: var(--color-text-default);
  background: var(--color-surface-default);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-action-primary); }
::selection { background: var(--color-action-primary-subtle); color: var(--color-action-primary-hover); }

/* ── Top bar ───────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: var(--space-6);
  padding: 0 var(--space-6);
  height: 56px;
  background: var(--color-surface-default);
  border-bottom: 1px solid var(--color-border-subtle);
}
.topbar .logo { display: flex; align-items: baseline; gap: var(--space-2); font-weight: 700; letter-spacing: -0.015em; color: var(--color-header-logo); font-size: 17px; }
.topbar .logo .logo-mark { width: 20px; height: 20px; align-self: center; flex: none; }
.topbar .logo .subtitle { color: var(--color-text-subtle); font-weight: 500; font-size: 13px; letter-spacing: 0; }
.topbar nav { display: flex; gap: var(--space-6); margin-left: auto; }
.topbar nav a { font-size: 14px; font-weight: 500; color: var(--color-text-subtle); }
.topbar nav a:hover, .topbar nav a.is-active { color: var(--color-text-default); }
.topbar .version-pill { font-family: var(--font-mono); font-size: 12px; color: var(--color-text-subtle); padding: 4px 10px; border: 1px solid var(--color-border-default); border-radius: var(--radius-full); }

/* ── Layout shell ──────────────────────────────────────────── */
.shell { max-width: var(--container-max); margin: 0 auto; display: grid; grid-template-columns: var(--nav-w) 1fr; gap: var(--space-12); padding: var(--space-8) var(--space-6); align-items: start; }
.shell.wide { grid-template-columns: var(--nav-w) 1fr; max-width: 1400px; }
.shell.solo { display: block; max-width: var(--container-max); }

/* ── Side nav ──────────────────────────────────────────────── */
.sidenav { position: sticky; top: 72px; align-self: start; }
.sidenav .group { margin-bottom: var(--space-6); }
.sidenav .group h4 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-subtle); margin: 0 0 var(--space-2); font-weight: 600; font-family: var(--font-mono); }
.sidenav .group ul { list-style: none; padding: 0; margin: 0; }
.sidenav .group li a { display: block; padding: 6px 10px; font-size: 14px; color: var(--color-text-default); border-radius: var(--radius-sm); }
.sidenav .group li a:hover { background: var(--color-surface-muted); }
.sidenav .group li a.is-active { background: var(--color-action-primary-subtle); color: var(--color-action-primary-hover); font-weight: 500; }
.sidenav .group li a .badge { font-family: var(--font-mono); font-size: 10px; padding: 1px 6px; border-radius: 4px; background: var(--color-surface-muted); margin-left: 6px; color: var(--color-text-subtle); }

/* ── Content ───────────────────────────────────────────────── */
.content { max-width: var(--content-max); }
.content.wide { max-width: 100%; }
.eyebrow { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-action-primary); margin: 0 0 var(--space-3); font-weight: 600; }
h1 { font-size: 40px; line-height: 1.12; letter-spacing: -0.02em; font-weight: 600; margin: 0 0 var(--space-4); }
h2 { font-size: 24px; line-height: 1.2; letter-spacing: -0.015em; font-weight: 600; margin: var(--space-12) 0 var(--space-3); scroll-margin-top: 72px; }
h3 { font-size: 17px; line-height: 1.3; font-weight: 600; margin: var(--space-8) 0 var(--space-2); }
p { margin: 0 0 var(--space-4); max-width: 65ch; }
.lede { font-size: 18px; line-height: 1.55; color: var(--color-text-subtle); margin-bottom: var(--space-8); max-width: 65ch; }
ul, ol { padding-left: 1.4em; margin: 0 0 var(--space-4); }
li { margin: 0 0 6px; max-width: 65ch; }

code { font-family: var(--font-mono); font-size: 0.88em; background: var(--color-surface-muted); padding: 1px 6px; border-radius: var(--radius-sm); color: var(--color-text-default); }
pre { font-family: var(--font-mono); font-size: 13px; line-height: 1.6; background: #1C1917; color: #F5F5F4; padding: var(--space-4) var(--space-6); border-radius: var(--radius-md); overflow-x: auto; margin: 0 0 var(--space-4); }
pre code { background: transparent; color: inherit; padding: 0; }

/* ── Component primitives ──────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--radius-lg); font-weight: 600; font-size: 14px; border: 1px solid transparent; cursor: pointer; font-family: inherit; transition: background-color 100ms, color 100ms, border-color 100ms; }
.btn-primary { background: var(--color-action-primary); color: var(--color-text-on-action); }
.btn-primary:hover { background: var(--color-action-primary-hover); color: var(--color-text-on-action); }
.btn-secondary { background: var(--color-surface-default); color: var(--color-action-primary); border-color: var(--color-action-primary); }
.btn-secondary:hover { background: var(--color-action-primary-subtle); }
.btn-ghost { background: transparent; color: var(--color-action-primary); }
.btn-ghost:hover { background: var(--color-action-primary-subtle); }

/* ── Cards / surfaces ──────────────────────────────────────── */
.card { background: var(--color-surface-default); border: 1px solid var(--color-border-default); border-radius: var(--radius-lg); padding: var(--space-6); }
.card.compact { padding: var(--space-4) var(--space-6); }
.card-grid { display: grid; gap: var(--space-4); }
.card-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 880px) { .card-grid.cols-2, .card-grid.cols-3, .card-grid.cols-4 { grid-template-columns: 1fr; } }

/* ── Status pills ──────────────────────────────────────────── */
.pill { display: inline-flex; align-items: center; gap: 4px; padding: 2px 10px; border-radius: var(--radius-full); font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; }
.pill-stable { background: #DCFCE7; color: #166534; }
.pill-beta { background: #FEF3C7; color: #7A5A04; }
.pill-deferred { background: var(--color-surface-muted); color: var(--color-text-subtle); }
.pill-new { background: var(--color-action-primary-subtle); color: var(--color-action-primary-hover); }
.pill i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ── Token swatch / chip ───────────────────────────────────── */
.swatch { width: 100%; height: 64px; border-radius: var(--radius-md); display: flex; align-items: flex-end; justify-content: space-between; padding: 6px 10px; font-family: var(--font-mono); font-size: 11px; color: #fff; text-shadow: 0 1px 0 rgba(0,0,0,0.25); cursor: pointer; transition: transform 80ms; }
.swatch.tint { color: var(--color-text-default); text-shadow: none; }
.swatch:hover { transform: translateY(-1px); }
.swatch .stop { opacity: 0.85; }
.swatch .hex { font-weight: 700; }

/* ── Anchor nav / on-this-page ─────────────────────────────── */
.toc { position: sticky; top: 72px; font-size: 13px; padding-left: var(--space-4); border-left: 1px solid var(--color-border-default); align-self: start; }
.toc h5 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-subtle); margin: 0 0 var(--space-2); font-family: var(--font-mono); }
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { margin: 0 0 4px; }
.toc a { color: var(--color-text-subtle); }
.toc a:hover { color: var(--color-action-primary); }

/* ── Tables ────────────────────────────────────────────────── */
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; margin: 0 0 var(--space-6); }
.tbl th { text-align: left; font-weight: 600; padding: 10px 12px; border-bottom: 2px solid var(--color-text-default); font-size: 13px; }
.tbl td { padding: 10px 12px; border-bottom: 1px solid var(--color-border-default); vertical-align: top; }
.tbl td code { font-size: 12px; }
.tbl .num { font-family: var(--font-mono); text-align: right; }

/* ── Code block with copy ──────────────────────────────────── */
.code-block { position: relative; }
.code-block .copy { position: absolute; top: 8px; right: 8px; background: #292524; border: 1px solid #44403C; color: #D6D3D1; padding: 4px 10px; border-radius: var(--radius-sm); font-family: var(--font-mono); font-size: 11px; cursor: pointer; transition: background 100ms; }
.code-block .copy:hover { background: #44403C; color: #FFFFFF; }
.code-block .copy.copied { background: var(--color-iris); color: #FFFFFF; border-color: var(--color-iris); }

/* ── Footer ────────────────────────────────────────────────── */
.sitefoot { background: var(--color-surface-inverse); color: var(--color-text-on-inverse-subtle); padding: var(--space-12) var(--space-6); margin-top: var(--space-16); }
.sitefoot .inner { max-width: var(--container-max); margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-8); }
.sitefoot h5 { font-size: 13px; color: var(--color-text-on-inverse); margin: 0 0 var(--space-3); font-weight: 600; }
.sitefoot a { color: var(--color-text-on-inverse-subtle); font-size: 14px; display: block; padding: 3px 0; }
.sitefoot a:hover { color: var(--color-text-on-inverse); }
.sitefoot .copy { grid-column: 1 / -1; padding-top: var(--space-6); border-top: 1px solid var(--color-border-inverse); margin-top: var(--space-6); font-size: 13px; color: var(--color-text-on-inverse-subtle); }
@media (max-width: 720px) { .sitefoot .inner { grid-template-columns: 1fr 1fr; } }

/* ── Misc ──────────────────────────────────────────────────── */
.kbd { font-family: var(--font-mono); background: var(--color-surface-muted); padding: 1px 6px; border-radius: var(--radius-sm); font-size: 12px; border: 1px solid var(--color-border-default); }
hr { border: 0; border-top: 1px solid var(--color-border-default); margin: var(--space-12) 0; }
.muted { color: var(--color-text-subtle); }
.tabular { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }