/* rsenn project sites — base stylesheet, shared by every site.
 *
 * Design contract (see tools/site/README.md, "Theming"):
 *   - Every colour, font and shape is a custom property on :root, defined ONCE
 *     with light-dark(light, dark). color-scheme follows the OS, and the header
 *     toggle pins it through [data-theme]. A site's theme.css therefore
 *     overrides a token in one place instead of three.
 *   - theme.css is loaded after this file and may also add rules; the hooks it
 *     is expected to use are listed in the "imprint hooks" block below.
 *   - Markup vocabulary: shell/doc pages (.topbar .layout .sidebar .doc .toc),
 *     landing pages (.hero .section .cards .grid .split .checks .note, plus the
 *     centred variant .hero-center with .badges/.promise/.demo/.start), and the
 *     playground (.play*). Both landing vocabularies are supported.
 */

:root {
  color-scheme: light dark;

  --bg:          light-dark(#fbfbfa, #14161a);
  --bg-raised:   light-dark(#ffffff, #1a1d22);
  --bg-sunken:   light-dark(#f2f2f0, #101216);
  --bg-code:     light-dark(#f6f6f4, #1a1d22);
  --fg:          light-dark(#1b1c1a, #e6e8e3);
  --fg-muted:    light-dark(#5e625c, #9aa0a6);
  --fg-faint:    light-dark(#8c918a, #6d747b);
  --line:        light-dark(#e2e3df, #272b31);
  --line-strong: light-dark(#cdcfc9, #3a3f47);

  --accent:      light-dark(#0b7c72, #3fd0bd);
  --accent-fg:   light-dark(#ffffff, #0d1114);
  --accent-soft: light-dark(#e2f2f0, #17302f);

  /* syntax colours: t-kw t-str t-num t-cm t-fn t-type t-atom t-op t-var t-pre */
  --t-kw:   light-dark(#8a3ba8, #c792ea);
  --t-str:  light-dark(#0a7d43, #9ad48a);
  --t-num:  light-dark(#b5581a, #f0a05a);
  --t-cm:   light-dark(#8c918a, #6d747b);
  --t-fn:   light-dark(#1c5fbe, #82aaff);
  --t-type: var(--accent);
  --t-atom: var(--t-num);
  --t-op:   var(--fg-muted);
  --t-var:  var(--t-num);
  --t-pre:  var(--t-kw);

  /* terminal panes (playground output) */
  --term-bg: light-dark(#16151a, #0d0d11);
  --term-fg: #e6e4de;
  --ok:  #7fd18a;
  --bad: #e08a8a;

  /* type and shape */
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Inter, Roboto, "Helvetica Neue", sans-serif;
  --font-display: var(--sans);   /* h1/h2 of docs and landing */
  --font-brand: var(--mono);     /* topbar brand and hero title */
  --heading-tracking: -0.015em;
  --radius: 8px;
  --w-side: 15rem;
  --w-toc: 13rem;
  --wide: 1180px;

  /* imprint hooks: decoration a theme can switch on without touching rules */
  --hero-bg: none;               /* any CSS background, e.g. a gradient/pattern */
  --hero-fg: var(--fg);
  --topbar-bg: color-mix(in srgb, var(--bg) 85%, transparent);
  --mark-bg: transparent;        /* brand mark chip */
  --mark-fg: var(--accent);
  --mark-pad: 0;
  --card-bg: var(--bg-raised);
  --card-shadow: none;
  --h2-rule: 1px solid var(--line);
  --logo-h: 1.7rem;              /* height of the header logo (config.art.logo) */
  --wallpaper-opacity: 0.35;     /* live background (config.art.wallpaper) */
  --wallpaper-veil: 78%;         /* how opaque the reading column is over it */
}

:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

/* legacy aliases: hand-written landing/play markup predates the token rename */
:root {
  --bg-soft: var(--bg-sunken);
  --fg-soft: var(--fg-muted);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 var(--sans);
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent); text-underline-offset: 2px; }
a:hover { text-decoration-color: currentColor; }

/* ------------------------------------------------------------------ topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 1.25rem;
  height: 3.5rem;
  background: var(--topbar-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font: 600 1.05rem/1 var(--font-brand);
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand .mark {
  display: inline-block;
  color: var(--mark-fg);
  background: var(--mark-bg);
  border-radius: 5px;
  padding: var(--mark-pad);
  margin-right: 0.35rem;
}

.topnav { display: flex; gap: 1.25rem; flex-wrap: wrap; margin-left: auto; font-size: 0.92rem; }
.topnav a { color: var(--fg-muted); text-decoration: none; }
.topnav a:hover { color: var(--accent); }

.brand .logo { display: inline-flex; height: var(--logo-h); margin-right: 0.5rem; vertical-align: middle; }
.brand .logo svg, .brand .logo img { height: 100%; width: auto; }

/* ---------------------------------------------------------- live wallpaper */
/* The svg is inlined so its shapes can use var(--accent) etc. It sits behind
   everything; the page background moves from body to html to stay visible. */

.wallpaper { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; opacity: var(--wallpaper-opacity); }
.wallpaper svg { display: block; width: 100%; height: 100%; }
html:has(.wallpaper) { background: var(--bg); }
body:has(.wallpaper) { background: transparent; }
.wallpaper ~ .layout .doc {
  background: color-mix(in srgb, var(--bg) var(--wallpaper-veil), transparent);
  border-radius: var(--radius);
  padding: 0.25rem 1.25rem 1rem;
}

/* ------------------------------------------------------------------ search */

.search { position: relative; width: 16rem; max-width: 30vw; }
.search input {
  width: 100%;
  font: 0.88rem/1 var(--sans);
  color: var(--fg);
  background: var(--bg-sunken);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.45rem 0.7rem;
}
.search input:focus { outline: none; border-color: var(--accent); }
.search input::-webkit-search-cancel-button { cursor: pointer; }

.search-results {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  width: max(100%, 22rem);
  max-height: 60vh;
  overflow-y: auto;
  background: var(--bg-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px -12px rgba(0, 0, 0, 0.35);
  z-index: 30;
}
.search-results a {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.5rem 0.8rem;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
.search-results a:last-child { border-bottom: 0; }
.search-results a:hover, .search-results a.active { background: var(--bg-sunken); }
.search-results .sr-title { color: var(--fg); font: 600 0.88rem/1.3 var(--mono); }
.search-results .sr-meta { color: var(--fg-faint); font-size: 0.76rem; }

.themetoggle {
  border: 1px solid var(--line);
  background: var(--bg-raised);
  color: var(--fg-muted);
  border-radius: var(--radius);
  width: 2rem;
  height: 2rem;
  font-size: 0.9rem;
  cursor: pointer;
  line-height: 1;
}
.themetoggle:hover { color: var(--fg); border-color: var(--line-strong); }

/* ------------------------------------------------------------------ layout */

.layout {
  display: grid;
  grid-template-columns: var(--w-side) minmax(0, 1fr) var(--w-toc);
  gap: 2.5rem;
  max-width: 84rem;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  align-items: start;
}

.sidebar, .toc {
  position: sticky;
  top: 4.5rem;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
  font-size: 0.88rem;
}

.navgroup { margin-bottom: 1.5rem; }
.navgroup h3, .toc h3 {
  margin: 0 0 0.5rem;
  font: 600 0.72rem/1 var(--sans);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.navgroup ul, .toc ul { list-style: none; margin: 0; padding: 0; }
.navgroup li a {
  display: block;
  padding: 0.22rem 0.6rem;
  margin-left: -0.6rem;
  border-radius: 6px;
  color: var(--fg-muted);
  text-decoration: none;
}
.navgroup li a:hover { background: var(--bg-sunken); color: var(--fg); }
.navgroup li a.here { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.toc li a { display: block; padding: 0.16rem 0; color: var(--fg-muted); text-decoration: none; }
.toc li a:hover { color: var(--accent); }
.toc li.lvl3 a { padding-left: 0.9rem; font-size: 0.84rem; }

.doc { min-width: 0; }

/* -------------------------------------------------------------- typography */

.doc h1, .doc h2, .doc h3, .doc h4, .doc h5, .doc h6 {
  font-family: var(--font-display);
  line-height: 1.25;
  letter-spacing: var(--heading-tracking);
  scroll-margin-top: 5rem;
  position: relative;
}
.doc h1 { font-size: 2.1rem; margin: 0 0 1.5rem; }
.doc h2 { font-size: 1.45rem; margin: 3rem 0 1rem; padding-top: 1.5rem; border-top: var(--h2-rule); }
.doc h3 { font-size: 1.12rem; margin: 2rem 0 0.75rem; }
.doc h4 { font-size: 1rem; margin: 1.5rem 0 0.5rem; color: var(--fg-muted); }

.doc h1 code, .doc h2 code, .doc h3 code, .doc h4 code {
  font-size: 0.92em;
  background: none;
  padding: 0;
  border: 0;
  color: inherit;
}

.anchor {
  position: absolute;
  left: -1.1rem;
  color: var(--fg-faint);
  text-decoration: none;
  opacity: 0;
  font-weight: 400;
}
h1:hover > .anchor, h2:hover > .anchor, h3:hover > .anchor, h4:hover > .anchor, .anchor:focus { opacity: 1; }

.doc p, .doc li { overflow-wrap: break-word; }
.doc ul, .doc ol { padding-left: 1.35rem; }
.doc li { margin: 0.3rem 0; }
.doc li > ul, .doc li > ol { margin: 0.3rem 0; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }
.doc blockquote { margin: 1rem 0; padding-left: 1rem; border-left: 3px solid var(--line); color: var(--fg-muted); }

/* -------------------------------------------------------------------- code */

code, pre, kbd { font-family: var(--mono); }

code {
  font-size: 0.875em;
  background: var(--bg-code);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.1em 0.35em;
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 1.25rem 0;
}
pre code { background: none; border: 0; padding: 0; font-size: 0.85rem; line-height: 1.6; }

.codeblock {
  position: relative;
  margin: 1.25rem 0;
  background: var(--bg-code);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.codeblock[data-lang]::after {
  content: attr(data-lang);
  position: absolute;
  top: 0.45rem;
  right: 0.6rem;
  font: 600 0.65rem/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.codeblock pre { margin: 0; padding: 1rem 1.1rem; overflow-x: auto; border: 0; border-radius: 0; background: none; }
.codeblock code { background: none; border: 0; padding: 0; font-size: 0.85rem; line-height: 1.6; color: var(--fg); }

.t-kw, .t-keyword { color: var(--t-kw); }
.t-str, .t-string { color: var(--t-str); }
.t-num, .t-number { color: var(--t-num); }
.t-cm, .t-comment { color: var(--t-cm); font-style: italic; }
.t-fn, .t-builtin { color: var(--t-fn); }
.t-type { color: var(--t-type); }
.t-atom { color: var(--t-atom); }
.t-op { color: var(--t-op); }
.t-var { color: var(--t-var); }
.t-pre, .t-preproc { color: var(--t-pre); }
.t-prop, .t-id { color: inherit; }

/* ------------------------------------------------------------------ tables */

.tablewrap { overflow-x: auto; margin: 1.25rem 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { text-align: left; padding: 0.55rem 0.9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--bg-sunken); font-weight: 600; white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
td code { white-space: nowrap; }

/* member-table anchors: one per documented function/property/constant */
td:has(> .member-anchor) { position: relative; }
.member-anchor {
  margin-left: 0.4rem;
  color: var(--fg-faint);
  text-decoration: none;
  opacity: 0;
  font-weight: 400;
}
tr:hover .member-anchor, td:has(> .member-anchor):hover .member-anchor { opacity: 1; }
td code:target { background: var(--accent-soft); border-color: var(--accent); }

.editlink { margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--line); font-size: 0.88rem; }
.editlink a { color: var(--fg-muted); text-decoration: none; }
.editlink a:hover { color: var(--accent); }

/* ----------------------------------------------------------------- landing */

.landing main, .landing > section { max-width: 68rem; margin: 0 auto; padding: 0 1.5rem; }
.landing > section { max-width: var(--wide); padding: 0 clamp(1rem, 4vw, 2.5rem); }
.landing h2 { font-family: var(--font-display); }

.hero {
  padding: 4.5rem 0 3.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: center;
  background: var(--hero-bg);
  color: var(--hero-fg);
}
.hero h1 {
  font: 700 clamp(2.2rem, 5vw, 3.1rem)/1.1 var(--font-display);
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}
.hero .lede { font-size: 1.12rem; color: var(--fg-muted); margin: 0 0 1.5rem; max-width: 34rem; }
.hero .codeblock { margin: 0; box-shadow: 0 10px 40px -20px rgba(0, 0, 0, 0.45); }

/* centred hero: a title over a tagline, no sample beside it */
.hero.hero-center { display: block; text-align: center; padding-top: clamp(2.5rem, 7vw, 5rem); }
.hero-center h1 { font: 700 clamp(3rem, 9vw, 5.5rem)/1 var(--font-brand); letter-spacing: -0.045em; }
.tagline { max-width: 46rem; margin: 0 auto; font-size: clamp(1.05rem, 2.2vw, 1.3rem); color: var(--fg-muted); }
.hero-center .cta { justify-content: center; margin: 2rem 0 1.5rem; }

.eyebrow {
  display: inline-block;
  font: 600 0.7rem/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.4rem 0.7rem;
  margin-bottom: 1.25rem;
}

.cta { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  color: var(--fg);
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.btn.primary:hover { color: var(--accent-fg); filter: brightness(1.08); }
.btn.ghost { background: none; }

.badges {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  justify-content: center;
  padding: 0;
  margin: 0 0 1rem;
  color: var(--fg-faint);
  font-size: 0.9rem;
}
.badges b { color: var(--fg); font-family: var(--mono); }

.section { padding: 3.5rem 0; border-top: 1px solid var(--line); }
.section > h2 { font-size: 1.6rem; letter-spacing: -0.02em; margin: 0 0 0.5rem; }
.section > .sub { color: var(--fg-muted); margin: 0 0 2rem; max-width: 44rem; }

/* section-per-block landing (centred variant): rule + heading + prose */
.landing > section:not(.hero) h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); letter-spacing: -0.02em; margin: 3.5rem 0 1.5rem; }
.promise, .status { border-top: 1px solid var(--line); padding-top: 0.5rem; }
.promise p, .status p, .demo p, .start p { max-width: 46rem; color: var(--fg-muted); }
.promise b, .status b { color: var(--fg); }
.sample { margin: 0 0 1.2rem; }

.grid, .cards { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.cards { grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); }
.card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 1.25rem;
}
.card h3 { margin: 0 0 0.4rem; font-size: 1rem; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--fg-muted); font-size: 0.92rem; }
.cards .card p { margin: 0 0 0.8rem; }
.card .more { font-size: 0.9rem; font-weight: 600; }
.card .ico { display: block; font-size: 1.1rem; margin-bottom: 0.6rem; color: var(--accent); font-family: var(--mono); }

.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); gap: 2rem; }
.split h3 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.split p { color: var(--fg-muted); margin: 0 0 1rem; }

.checks { list-style: none; padding: 0; margin: 0; }
.checks li { padding-left: 1.5rem; position: relative; margin: 0.5rem 0; color: var(--fg-muted); }
.checks li::before { content: "→"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }
.checks strong { color: var(--fg); font-weight: 600; }

.note {
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--bg-raised);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  color: var(--fg-muted);
  font-size: 0.92rem;
}
.note strong { color: var(--fg); }

.sizes { border-collapse: collapse; width: 100%; max-width: 34rem; margin: 1.5rem 0 0.6rem; font-size: 0.95rem; }
.sizes th, .sizes td { text-align: left; padding: 0.45rem 0.8rem; border-bottom: 1px solid var(--line); }
.sizes th { color: var(--fg-faint); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; background: none; }
.sizes td:nth-child(2) { font-family: var(--mono); }
.sizes tr.me td { background: var(--accent-soft); font-weight: 600; }
.fineprint { color: var(--fg-faint); font-size: 0.85rem; }

/* tabbed hero example (qjs-lws) */
.hero-example .tab-btn { font: 600 0.8rem var(--mono); padding: 0.35rem 0.8rem; border: 1px solid var(--line); border-radius: 6px 6px 0 0; background: none; color: var(--fg-muted); cursor: pointer; }
.hero-example .tab-btn:hover { color: var(--fg); }
.hero-example .tab-btn.active { color: var(--accent-fg); background: var(--accent); border-color: var(--accent); }
.hero-example .tab-pane { display: none; }
.hero-example .tab-pane.active { display: block; }

/* ---------------------------------------------------------------- playground */

.play .playhead, .play .playgrid { max-width: var(--wide); margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2.5rem); }
.play .playhead { padding-top: 2.5rem; }
.play .playhead h1 { font: 700 2.4rem/1 var(--font-brand); letter-spacing: -0.03em; margin: 0 0 0.8rem; }
.play .playhead p { max-width: 46rem; color: var(--fg-muted); }

.playgrid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(22rem, 1fr)); margin-top: 1.5rem; }
.playgrid[hidden] { display: none; }

/* spans every column of the grid: panels that need the full playground width */
.playfull { grid-column: 1 / -1; }
.playsrc.wide { min-height: 16rem; }
.playcol { min-width: 0; display: flex; flex-direction: column; }
.playcol label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--fg-faint); margin-bottom: 0.4rem; }

.playsrc {
  width: 100%;
  min-height: 19rem;
  resize: vertical;
  background: var(--bg-code);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  font: 0.875rem/1.55 var(--mono);
}
.playsrc:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.playsrc[readonly] { color: var(--fg-muted); }
.playsrc.bad { border-color: var(--bad); }

.term {
  background: var(--term-bg);
  color: var(--term-fg);
  border-color: transparent;
  min-height: 19rem;
  max-height: 19rem;
  overflow: auto;
  white-space: pre-wrap;
  font-size: 0.875rem;
  margin: 0;
}

.playbar { display: flex; align-items: center; gap: 1rem; margin-top: 0.8rem; flex-wrap: wrap; }
.examples { color: var(--fg-faint); font-size: 0.88rem; }
.examples a { margin-left: 0.5rem; }
.exit { display: block; margin-top: 0.8rem; color: var(--ok); font-size: 0.8rem; }
.exit.bad { color: var(--bad); }

.playtabs { display: flex; gap: 0.5rem; max-width: var(--wide); margin: 1.5rem auto 0; padding: 0 clamp(1rem, 4vw, 2.5rem); }
.playtab, .astmodetab {
  font: 500 0.85rem var(--mono);
  padding: 0.45rem 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: none;
  color: var(--fg-muted);
  cursor: pointer;
}
.astmodetab { font-size: 0.8rem; padding: 0.3rem 0.7rem; }
.playtab:hover, .astmodetab:hover { color: var(--fg); border-color: var(--accent); }
.playtab.active, .astmodetab.active { color: var(--accent-fg); background: var(--accent); border-color: var(--accent); }
.astmodetabs { display: flex; gap: 0.4rem; margin: 0.8rem 0 0.6rem; }

.rename-label { font-size: 0.8rem; color: var(--fg-faint); }
.playbar input[type="text"] {
  font: 0.85rem var(--mono);
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg-code);
  color: var(--fg);
}

.asttree { overflow: auto; font-size: 0.8rem; padding: 0.75rem; }
.asttree summary { cursor: pointer; color: var(--accent); }
.asttree .astbody { margin-left: 1.1rem; border-left: 1px dashed var(--line); padding-left: 0.6rem; }
.asttree .astrow { margin: 0.15rem 0; }
.asttree .astkey { color: var(--fg-faint); margin-right: 0.3rem; }
.asttree .astleaf { color: var(--fg-muted); }

/* ------------------------------------------------------------------ footer */

.sitefoot {
  border-top: 1px solid var(--line);
  margin-top: 2rem;
  padding: 2rem 1.5rem 3rem;
  text-align: center;
  color: var(--fg-faint);
  font-size: 0.85rem;
}
.sitefoot p { margin: 0; }
.sitefoot a { color: var(--fg-muted); }

/* -------------------------------------------------------------- responsive */

@media (max-width: 68rem) {
  .layout { grid-template-columns: var(--w-side) minmax(0, 1fr); }
  .toc { display: none; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 2rem; padding-top: 3rem; }
}

@media (max-width: 48rem) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; padding-top: 1.25rem; }
  .sidebar {
    position: static;
    max-height: none;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    background: var(--bg-raised);
  }
  .navgroup { margin-bottom: 1rem; }
  .topnav { gap: 0.9rem; font-size: 0.85rem; }
  .doc h1 { font-size: 1.7rem; }
  .anchor, .member-anchor { display: none; }
  .topbar { flex-wrap: wrap; height: auto; gap: 0.75rem; padding: 0.6rem 0.9rem; }
  .search { order: 3; width: 100%; max-width: none; }
  .search-results { width: 100%; }
}