/* =========================================================================
   astorlm — documentation site
   Direction: technical / terminal. Paper light, graphite dark, one signal.
   ========================================================================= */

/* ---------------------------------- tokens ------------------------------- */
:root {
  color-scheme: light;

  --bg: #f7f5f0;
  --bg-raised: #fdfcf8;
  --bg-sunken: #eeebe3;
  --fg: #16181a;
  --fg-muted: #55595d;
  --fg-faint: #63676a;

  --rule: #ded9cd;
  --rule-strong: #c4beb1;

  --signal: #8a4f00;
  --signal-hover: #6d3d00;
  --signal-fg: #fffaf1;
  --signal-soft: #f4e9d3;
  --signal-line: #e2cda8;

  /* code panes stay dark in both themes: the terminal is the signature */
  --code-bg: #14161a;
  --code-bg-bar: #0f1113;
  --code-bd: #262a2e;
  --code-fg: #dadde2;
  --code-kw: #f5b04c;
  --code-str: #a3cfa3;
  --code-fn: #92c5e8;
  --code-com: #7c8794;
  --code-ui: #98a1a9;

  --sans: "IBM Plex Sans", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --r-xs: 3px;
  --r-sm: 5px;
  --r-md: 8px;
  --r-lg: 10px;

  --topbar-h: 56px;
  --sidebar-w: 264px;

  --t-fast: 120ms;
  --t-base: 180ms;
  --ease: cubic-bezier(.2, .7, .3, 1);

  --shadow-pop: 0 24px 48px -24px rgba(22, 20, 15, .5), 0 2px 8px rgba(22, 20, 15, .08);
  --shadow-lift: 0 1px 2px rgba(22, 20, 15, .06);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --bg: #101112;
    --bg-raised: #16181a;
    --bg-sunken: #1a1c1e;
    --fg: #e8e4db;
    --fg-muted: #a5a29a;
    --fg-faint: #85837d;

    --rule: #26282a;
    --rule-strong: #3a3d40;

    --signal: #f2b83f;
    --signal-hover: #ffcb63;
    --signal-fg: #1a1508;
    --signal-soft: #211b10;
    --signal-line: #4a3a1a;

    --code-bg: #0c0d0f;
    --code-bg-bar: #101214;
    --code-bd: #262a2e;

    --shadow-pop: 0 28px 56px -28px rgba(0, 0, 0, .8), 0 2px 8px rgba(0, 0, 0, .5);
    --shadow-lift: none;
  }
}

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

  --bg: #101112;
  --bg-raised: #16181a;
  --bg-sunken: #1a1c1e;
  --fg: #e8e4db;
  --fg-muted: #a5a29a;
  --fg-faint: #85837d;

  --rule: #26282a;
  --rule-strong: #3a3d40;

  --signal: #f2b83f;
  --signal-hover: #ffcb63;
  --signal-fg: #1a1508;
  --signal-soft: #211b10;
  --signal-line: #4a3a1a;

  --code-bg: #0c0d0f;
  --code-bg-bar: #101214;
  --code-bd: #262a2e;

  --shadow-pop: 0 28px 56px -28px rgba(0, 0, 0, .8), 0 2px 8px rgba(0, 0, 0, .5);
  --shadow-lift: none;
}

/* ---------------------------------- base --------------------------------- */
* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 24px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

::selection { background: var(--signal); color: var(--signal-fg); }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

.skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: 8px 12px;
  background: var(--bg-raised);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-sm);
  font: 500 12px var(--mono);
  color: var(--fg);
}
.skip:focus { top: 12px; }

/* ---------------------------------- topbar -------------------------------- */
.progress {
  position: fixed;
  inset: 0 auto auto 0;
  height: 2px;
  width: 0;
  background: var(--signal);
  z-index: 90;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 4px 6px 4px 2px;
  color: var(--fg);
  border-radius: var(--r-sm);
}
.brand:hover { text-decoration: none; background: var(--bg-sunken); }
.brand .mark { width: 22px; height: 22px; color: var(--signal); flex: none; }
.brand-word {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -.02em;
}

.ver {
  font: 500 10.5px var(--mono);
  letter-spacing: .02em;
  color: var(--signal);
  border: 1px solid var(--signal-line);
  background: var(--signal-soft);
  padding: 2px 6px;
  border-radius: var(--r-xs);
  white-space: nowrap;
}

.spacer { flex: 1; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--fg-muted);
  cursor: pointer;
  padding: 0;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.icon-btn:hover { background: var(--bg-sunken); color: var(--fg); }
.icon-btn svg { width: 17px; height: 17px; }

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  width: 236px;
  padding: 0 7px 0 10px;
  border: 1px solid var(--rule);
  border-radius: var(--r-sm);
  background: var(--bg-raised);
  color: var(--fg-faint);
  font: 400 12.5px var(--mono);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.search-trigger:hover { border-color: var(--rule-strong); color: var(--fg-muted); }
.search-trigger svg { width: 14px; height: 14px; flex: none; }
.search-trigger .kbd-hint { margin-left: auto; }
.search-trigger kbd { font-size: 9.5px; padding: 3px 4px; }

kbd {
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1;
  padding: 3px 5px;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: var(--r-xs);
  background: var(--bg);
  color: var(--fg-faint);
  white-space: nowrap;
}

.tb-link {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 8px;
  border-radius: var(--r-xs);
  font: 500 11px var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--fg-muted);
}
.tb-link:hover { color: var(--fg); background: var(--bg-sunken); text-decoration: none; }

#menuBtn { display: none; }

/* ---------------------------------- shell --------------------------------- */
.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: var(--topbar-h);
  align-self: start;
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 26px 14px 64px 20px;
  border-right: 1px solid var(--rule);
  scrollbar-width: thin;
  scrollbar-color: var(--rule-strong) transparent;
}

.sidebar .group {
  font: 500 10px var(--mono);
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 24px 8px 8px;
}
.sidebar .group:first-child { margin-top: 0; }

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

.sidebar a {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 5px 8px;
  border-radius: var(--r-xs);
  font-size: 13.4px;
  line-height: 1.45;
  color: var(--fg-muted);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.sidebar a:hover { background: var(--bg-sunken); color: var(--fg); text-decoration: none; }

.sidebar a .num {
  flex: none;
  width: 18px;
  font: 400 10px var(--mono);
  color: var(--fg-faint);
  font-variant-numeric: tabular-nums;
}
.sidebar a .lbl { flex: 1; min-width: 0; }

.sidebar a.active {
  background: var(--signal-soft);
  color: var(--fg);
  box-shadow: inset 2px 0 0 var(--signal);
}
.sidebar a.active .num { color: var(--signal); }

.tag-exp {
  font: 500 8.5px var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--signal);
  border: 1px solid var(--signal-line);
  border-radius: 2px;
  padding: 0 3px;
  margin-left: 4px;
  vertical-align: 1px;
}

main { min-width: 0; }

/* ---------------------------------- hero ---------------------------------- */
.hero { padding: 60px 64px 0; }

.hero-inner {
  max-width: 900px;
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(290px, .82fr);
  gap: 56px;
  align-items: start;
  padding-bottom: 52px;
}

.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  margin: 0 0 22px;
  font: 500 10.5px var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.meta-line span + span::before {
  content: "/";
  color: var(--signal-line);
  margin: 0 9px;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(2.45rem, 4.6vw, 3.85rem);
  line-height: 1.04;
  letter-spacing: -.035em;
  font-weight: 600;
  text-wrap: balance;
}

.lede {
  margin: 0 0 28px;
  max-width: 46ch;
  font-size: 16.5px;
  line-height: 1.62;
  color: var(--fg-muted);
}
.lede strong { color: var(--fg); font-weight: 600; }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--rule-strong);
  background: transparent;
  color: var(--fg);
  font: 500 13.5px var(--sans);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.btn:hover { background: var(--bg-sunken); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn svg { width: 15px; height: 15px; }

.btn.primary {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--signal-fg);
  font-weight: 600;
}
.btn.primary:hover { background: var(--signal-hover); border-color: var(--signal-hover); }

.install {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 300px;
  padding: 8px 8px 8px 12px;
  border: 1px solid var(--rule);
  border-radius: var(--r-sm);
  background: var(--bg-raised);
  font: 400 13px var(--mono);
  color: var(--fg);
}
.install .prompt { color: var(--signal); user-select: none; }
.install .cmd { flex: 1; white-space: nowrap; }
.install button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--r-xs);
  background: transparent;
  color: var(--fg-faint);
  cursor: pointer;
  line-height: 0;
}
.install button:hover { background: var(--bg-sunken); color: var(--fg); border-color: var(--rule); }
.install button svg { width: 14px; height: 14px; }
.install button.done { color: var(--signal); }

.hero-foot {
  margin: 18px 0 0;
  font: 400 11px var(--mono);
  color: var(--fg-faint);
  letter-spacing: .01em;
}
.hero-foot a { color: var(--fg-muted); }

/* spec sheet: the signature element */
.spec {
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  background: var(--bg-raised);
  overflow: hidden;
}
.spec-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--rule);
  background: var(--bg-sunken);
  font: 500 10px var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.spec-head b { color: var(--fg-muted); font-weight: 500; }

.spec dl { margin: 0; }
.spec-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--rule);
}
.spec-row:last-of-type { border-bottom: 0; }
.spec-row dt {
  font: 500 10.5px var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--signal);
  padding-top: 2px;
}
.spec-row dd {
  margin: 0;
  font-size: 12.8px;
  line-height: 1.5;
  color: var(--fg-muted);
}
.spec-row dd b { color: var(--fg); font-weight: 500; }

.spec-foot {
  padding: 9px 14px;
  border-top: 1px solid var(--rule);
  font: 400 9.5px var(--mono);
  color: var(--fg-faint);
  letter-spacing: .01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------------------------------- capabilities --------------------------- */
.caps {
  padding: 0 64px;
}
.caps-inner {
  max-width: 900px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--r-md);
  overflow: hidden;
}
.cap {
  background: var(--bg-raised);
  padding: 18px 20px 20px;
}
.cap-n {
  display: block;
  font: 500 9.5px var(--mono);
  letter-spacing: .12em;
  color: var(--signal);
  margin-bottom: 8px;
}
.cap-t {
  margin: 0 0 5px;
  font-size: 13.8px;
  font-weight: 600;
  letter-spacing: -.005em;
  color: var(--fg);
}
.cap-d {
  margin: 0;
  font-size: 12.9px;
  line-height: 1.55;
  color: var(--fg-muted);
}

/* ---------------------------------- document ------------------------------- */
.doc {
  padding: 8px 64px 112px;
  max-width: 900px;
  counter-reset: sec;
}

.doc > h2:first-child { margin-top: 30px; }

.doc h2 {
  counter-increment: sec;
  display: flex;
  align-items: baseline;
  gap: 11px;
  margin: 56px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
  font-size: 1.68rem;
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -.022em;
}
.doc h2::before {
  content: counter(sec, decimal-leading-zero);
  flex: none;
  font: 500 11px var(--mono);
  letter-spacing: .08em;
  color: var(--signal);
}

.doc h3 {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin: 34px 0 6px;
  font-size: 1.06rem;
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: -.008em;
}

.doc h4 {
  margin: 28px 0 10px;
  font: 500 10px var(--mono);
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

.doc h2 .pill, .doc h3 .pill { margin-left: 0; }

.anchor {
  opacity: 0;
  font: 400 .72em var(--mono);
  color: var(--fg-faint);
  transition: opacity var(--t-fast) var(--ease);
}
h2:hover .anchor, h3:hover .anchor, .anchor:focus-visible { opacity: 1; }

.doc p { margin: 13px 0; max-width: 68ch; }
.doc p a, .doc li a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; text-decoration-color: var(--signal-line); }
.doc p a:hover, .doc li a:hover { text-decoration-color: var(--signal); }

.doc ul, .doc ol { margin: 12px 0; padding-left: 22px; max-width: 68ch; }
.doc li { margin: 6px 0; }
.doc li::marker { color: var(--fg-faint); }

.doc hr { display: none; }

/* inline code */
.doc code {
  font-family: var(--mono);
  font-size: .855em;
  padding: .14em .36em;
  border: 1px solid var(--rule);
  border-radius: var(--r-xs);
  background: var(--bg-sunken);
  color: var(--fg);
  overflow-wrap: anywhere;
}

/* code panes */
.code-wrap {
  position: relative;
  margin: 18px 0;
  border: 1px solid var(--code-bd);
  border-radius: var(--r-md);
  background: var(--code-bg);
  overflow: hidden;
}

.code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 33px;
  padding: 0 7px 0 14px;
  border-bottom: 1px solid var(--code-bd);
  background: var(--code-bg-bar);
}
.code-lang {
  font: 500 9.5px var(--mono);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--code-ui);
}

.doc pre {
  margin: 0;
  padding: 15px 18px;
  background: transparent;
  color: var(--code-fg);
  font: 400 12.9px/1.72 var(--mono);
  tab-size: 2;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: #3a4046 transparent;
}
.doc pre code {
  display: block;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  overflow-wrap: normal;
}

.kw { color: var(--code-kw); }
.str { color: var(--code-str); }
.com { color: var(--code-com); font-style: italic; }
.fn { color: var(--code-fn); }

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 23px;
  padding: 0 7px;
  border: 1px solid transparent;
  border-radius: var(--r-xs);
  background: transparent;
  color: var(--code-ui);
  font: 500 9.5px var(--mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.copy-btn:hover { color: #e8e4db; background: rgba(255, 255, 255, .06); border-color: #30353a; }
.copy-btn.done { color: var(--code-kw); border-color: #4a3a1a; }
.copy-btn svg { width: 12px; height: 12px; }

/* tables */
.table-wrap {
  margin: 18px 0;
  border: 1px solid var(--rule);
  border-radius: var(--r-sm);
  background: var(--bg-raised);
  overflow-x: auto;
  scrollbar-width: thin;
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.4px;
  line-height: 1.55;
  font-variant-numeric: tabular-nums;
}
.doc th {
  padding: 9px 12px;
  text-align: left;
  vertical-align: bottom;
  font: 500 9.5px var(--mono);
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--fg-faint);
  border-bottom: 1px solid var(--rule-strong);
  white-space: nowrap;
}
.doc td {
  padding: 9px 12px;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
  overflow-wrap: break-word;
}
.doc tr:last-child td { border-bottom: 0; }
.doc tbody tr:hover { background: var(--bg-sunken); }
.doc td code { white-space: normal; overflow-wrap: break-word; font-size: 11.3px; background: var(--bg-sunken); border-color: transparent; }
.doc td:first-child { color: var(--fg); }
.doc td:first-child, .doc th:first-child { min-width: 190px; }
.doc td:nth-child(2), .doc th:nth-child(2) { min-width: 150px; }

/* callouts */
.note {
  margin: 20px 0;
  padding: 13px 18px;
  border-left: 2px solid var(--signal);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--bg-sunken);
  color: var(--fg);
  font-size: 14px;
  line-height: 1.62;
  max-width: 72ch;
}
.note > strong:first-child { color: var(--signal); font-weight: 600; }
.note code { background: var(--bg-raised); }
.note a { text-decoration: underline; text-underline-offset: 2px; }

/* tags */
.pill {
  display: inline-flex;
  align-items: center;
  height: 17px;
  padding: 0 5px;
  margin-left: 8px;
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-xs);
  font: 500 8.5px var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--fg-muted);
  vertical-align: 2px;
}
.pill.node { color: var(--fg-muted); }
.pill.exp { color: var(--signal); border-color: var(--signal-line); background: var(--signal-soft); }

/* -------------------------------- search overlay --------------------------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  padding: 12vh 20px 20px;
  background: rgba(14, 12, 8, .46);
}
.overlay.open { display: block; }

.search-box {
  max-width: 620px;
  margin: 0 auto;
  background: var(--bg-raised);
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-pop);
  overflow: hidden;
}

.search-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--rule);
}
.search-head svg { width: 16px; height: 16px; color: var(--fg-faint); flex: none; }
#searchInput {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--fg);
  font: 400 15.5px var(--sans);
  outline: none;
}
#searchInput::placeholder { color: var(--fg-faint); }
#searchInput::-webkit-search-cancel-button,
#searchInput::-webkit-search-decoration { -webkit-appearance: none; appearance: none; }
.search-head kbd { flex: none; }

#results { max-height: 56vh; overflow-y: auto; padding: 6px; }

.res {
  display: block;
  padding: 9px 11px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  color: var(--fg);
}
.res:hover, .res.sel {
  background: var(--bg-sunken);
  border-color: var(--rule);
  text-decoration: none;
}
.res .t {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13.8px;
  font-weight: 500;
}
.res .crumb {
  font: 400 9.5px var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.res .s {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 3px;
  font-size: 12.4px;
  line-height: 1.5;
  color: var(--fg-muted);
}
.res mark {
  background: var(--signal-soft);
  color: var(--fg);
  border-bottom: 1px solid var(--signal);
  border-radius: 2px;
  padding: 0 1px;
}

.search-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 8px 16px;
  border-top: 1px solid var(--rule);
  background: var(--bg-sunken);
  font: 400 10.5px var(--mono);
  color: var(--fg-faint);
}
.search-foot span { display: inline-flex; align-items: center; gap: 5px; }

.empty {
  padding: 34px 16px;
  text-align: center;
  font: 400 12px var(--mono);
  color: var(--fg-faint);
}

/* ---------------------------------- footer -------------------------------- */
footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  max-width: 900px;
  padding: 26px 64px 48px;
  border-top: 1px solid var(--rule);
  font: 400 11.5px var(--mono);
  color: var(--fg-faint);
}
footer .f-sp { flex: 1; }
footer a { color: var(--fg-muted); }
footer a:hover { color: var(--signal); text-decoration: none; }

/* ---------------------------------- back to top ---------------------------- */
.backtop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--rule-strong);
  border-radius: var(--r-sm);
  background: var(--bg-raised);
  color: var(--fg-muted);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.backtop.show { opacity: 1; pointer-events: auto; }
.backtop:hover { color: var(--signal); border-color: var(--signal); }
.backtop svg { width: 15px; height: 15px; }

/* ---------------------------------- responsive ----------------------------- */
@media (max-width: 1140px) {
  :root { --sidebar-w: 244px; }
  .hero, .caps, .doc { padding-left: 40px; padding-right: 40px; }
  footer { padding-left: 40px; padding-right: 40px; }
  .hero-inner { gap: 40px; }
}

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .lede { max-width: 60ch; }
  .spec { max-width: 520px; }
  .caps-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  #menuBtn { display: inline-flex; }
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    z-index: 55;
    width: min(300px, 84vw);
    height: calc(100vh - var(--topbar-h));
    background: var(--bg);
    border-right: 1px solid var(--rule-strong);
    box-shadow: var(--shadow-pop);
    transform: translateX(-102%);
    transition: transform var(--t-base) var(--ease);
    visibility: hidden;
  }
  .sidebar.open { transform: translateX(0); visibility: visible; }
  .scrim {
    position: fixed;
    inset: var(--topbar-h) 0 0;
    z-index: 54;
    display: none;
    background: rgba(14, 12, 8, .44);
  }
  .scrim.open { display: block; }
  .search-trigger { width: 34px; padding: 0; justify-content: center; font-size: 0; }
  .search-trigger .ph, .search-trigger .kbd-hint { display: none; }
}

@media (max-width: 720px) {
  .hero { padding: 40px 22px 0; }
  .hero-inner { padding-bottom: 40px; }
  .caps { padding: 0 22px; }
  .caps-inner { grid-template-columns: minmax(0, 1fr); }
  .doc { padding: 0 22px 88px; }
  footer { padding: 24px 22px 40px; }
  .doc h2 { font-size: 1.42rem; margin-top: 48px; }
  .doc h2::before { font-size: 10px; }
  .install { width: 100%; min-width: 0; }
  body { font-size: 15px; }
}

@media (max-width: 560px) {
  .topbar { padding: 0 10px; gap: 4px; }
  .ver { display: none; }
  .tb-link { display: none; }
  .hero h1 { font-size: clamp(2.1rem, 9vw, 2.7rem); }
  .lede { font-size: 15.5px; }
  .cta-row { gap: 8px; }
  .cta-row .btn { flex: 1 1 0; justify-content: center; padding: 0 10px; font-size: 13px; white-space: nowrap; }
  .spec-row { grid-template-columns: 76px minmax(0, 1fr); }
  .backtop { right: 12px; bottom: 12px; }
}

/* ---------------------------------- print --------------------------------- */
@media print {
  .topbar, .sidebar, .backtop, .overlay, .progress, .search-trigger, .code-bar { display: none !important; }
  .shell { display: block; }
  .hero, .caps, .doc, footer { padding-left: 0; padding-right: 0; max-width: none; }
  .hero-inner { grid-template-columns: 1fr; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .doc h2 { break-after: avoid; }
  .code-wrap { break-inside: avoid; background: #fff; border-color: #bbb; }
  .doc pre { color: #111; }
  .kw, .str, .fn { color: #111; }
  .com { color: #555; }
  a { color: #000; }
}

/* ---------------------------------- motion -------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}