/* linux-labs site styles: shared by index.html, catalog.html and docs/*.html.
   System fonts only, no external resources. Light and dark follow the
   system setting; the terminal panels stay dark in both. */

:root {
  --bg: #f7f8fa;
  --fg: #16202a;
  --muted: #56626f;
  --accent: #2457c5;
  --border: #d9dee6;
  --surface: #eceff3;
  --term: #0d1117;
  --term-fg: #c9d1d9;
  --term-dim: #8b949e;
  --term-line: #222a33;
  --pass: #3fb950;
  --fail: #ff6b63;
  --prompt: #79c0ff;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Liberation Sans", sans-serif;
  --page: 1120px;
  --gutter: 24px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f14;
    --fg: #e3e8ee;
    --muted: #9ba7b3;
    --accent: #7aa7ff;
    --border: #252d37;
    --surface: #151b22;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  overflow-wrap: break-word;
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

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

.skip {
  position: absolute; left: 8px; top: -40px;
  background: var(--fg); color: var(--bg);
  padding: 6px 10px; border-radius: 6px; z-index: 10;
}
.skip:focus { top: 8px; }

/* ---------- header ---------- */
.top {
  max-width: var(--page); margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap;
  padding: 14px var(--gutter);
}
.brand { font-family: var(--mono); font-weight: 700; color: var(--fg); text-decoration: none; }
.brand span { color: var(--accent); }
.top nav ul { display: flex; gap: 6px 20px; flex-wrap: wrap; list-style: none; margin: 0; padding: 0; font-size: 14px; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a:hover, .top nav a[aria-current="page"] { color: var(--accent); }

/* ---------- footer ---------- */
.foot {
  max-width: var(--page); margin: 0 auto;
  border-top: 1px solid var(--border);
  padding: 14px var(--gutter) 24px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: var(--muted);
}
.foot a { color: var(--muted); }
.foot a:hover { color: var(--accent); }
.foot code { font-size: 12.5px; }

/* ---------- code ---------- */
code, pre, kbd { font-family: var(--mono); }
code { font-size: 0.9em; }
pre {
  background: var(--term); color: var(--term-fg);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 12px 14px; margin: 12px 0;
  overflow-x: auto; font-size: 13px; line-height: 1.55;
}
pre code { font-size: inherit; background: none; padding: 0; }
:not(pre) > code { background: var(--surface); padding: 0.1em 0.35em; border-radius: 4px; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 12px 0 20px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: 13px; }
table.labs td:first-child code { white-space: nowrap; }
.prose td { min-width: 8em; }

/* ---------- content pages (catalog, docs) ---------- */
.page { max-width: var(--page); margin: 0 auto; padding: 20px var(--gutter) 40px; }
.prose { max-width: 760px; }
.page h1 { font-size: clamp(26px, 3.6vw, 34px); line-height: 1.15; letter-spacing: -.015em; margin: 8px 0 12px; }
.page h2 { font-size: 21px; line-height: 1.25; margin: 32px 0 8px; }
.page h3 { font-size: 17px; margin: 24px 0 6px; }
.page p, .page li { max-width: 72ch; }
.page ul, .page ol { padding-left: 1.4em; }
.page li + li { margin-top: 4px; }
.lead { color: var(--muted); font-size: 16px; margin: 0 0 20px; max-width: 60ch; }
.page h2[id], .page h3[id] { scroll-margin-top: 12px; }

.page .subnav, .subnav { display: flex; flex-wrap: wrap; gap: 6px 8px; list-style: none; padding: 0; margin: 0 0 24px; font-size: 14px; }
.page .subnav li { margin: 0; }
.subnav a { display: inline-block; padding: 4px 10px; border: 1px solid var(--border); border-radius: 999px; text-decoration: none; color: var(--fg); }
.subnav a:hover { border-color: var(--accent); color: var(--accent); }
.subnav a[aria-current="page"] { background: var(--fg); border-color: var(--fg); color: var(--bg); }

/* ---------- front page ---------- */
.hero {
  max-width: var(--page); margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: 32px; padding: 28px var(--gutter) 36px; align-items: start;
}
.hero > * { min-width: 0; }
.hero h1 { font-size: clamp(26px, 3.6vw, 36px); line-height: 1.15; margin: 0 0 12px; text-wrap: balance; letter-spacing: -.015em; }
.cmd {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; background: var(--bg); min-width: 0;
}
.cmd code { flex: 1; min-width: 0; white-space: pre-wrap; word-break: break-all; font-size: 13.5px; background: none; padding: 0; }
.copy {
  font: 12px/1 var(--sans); padding: 6px 10px; border-radius: 6px; cursor: pointer;
  border: 1px solid currentColor; background: transparent; color: var(--accent); white-space: nowrap;
}
.req { margin: 10px 0 0; font-size: 13px; color: var(--muted); }

.term {
  background: var(--term); color: var(--term-fg);
  border-radius: 10px; border: 1px solid var(--border);
  font-family: var(--mono); font-size: 12.5px; line-height: 1.55;
  overflow: hidden; min-width: 0; margin: 0;
}
.term-bar { padding: 10px 12px; border-bottom: 1px solid var(--term-line); color: var(--term-dim); font-size: 12px; }
.term pre { margin: 0; padding: 14px 16px; border: 0; border-radius: 0; font-size: inherit; background: none; }
.term .p { color: var(--prompt); }
.term .d { color: var(--term-dim); }
.term .ok { color: var(--pass); font-weight: 700; }
.term .no { color: var(--fail); font-weight: 700; }

.steps {
  max-width: var(--page); margin: 0 auto;
  padding: 8px var(--gutter) 32px; list-style: none;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px;
}
.step { border-top: 2px solid var(--accent); padding-top: 10px; min-width: 0; }
.step b { display: block; font-size: 14px; margin-bottom: 4px; }
.step code { font-size: 13px; color: var(--muted); word-break: break-word; background: none; padding: 0; }

.more { max-width: var(--page); margin: 0 auto; padding: 0 var(--gutter) 28px; }
details summary { cursor: pointer; color: var(--accent); font-size: 14px; }
details p { font-size: 14px; color: var(--muted); margin: 10px 0 0; max-width: 72ch; }
.more pre { margin: 10px 0 0; }

@media (max-width: 760px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 520px) {
  :root { --gutter: 16px; }
}