/* absd.dev: text first, one column, system fonts, light and dark. */

:root {
  --bg: #fafaf8;
  --bg-inset: #f0f1ee;
  --fg: #16181a;
  --fg-muted: #4b5157;
  --border: #d3d6d8;
  --accent: #1d4f91;
  --accent-hover: #123a6d;
  --l-mq: #2c6636;
  --l-cq: #1c5f69;
  --l-exp: #7f5300;
  --l-planned: #505b66;
  --l-unsupported: #962a2a;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "DejaVu Sans Mono", Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121416;
    --bg-inset: #1a1d20;
    --fg: #d7dadd;
    --fg-muted: #9ea5ac;
    --border: #2e3338;
    --accent: #8fb5e8;
    --accent-hover: #b4cff3;
    --l-mq: #8cc59a;
    --l-cq: #7fc7d0;
    --l-exp: #e2b764;
    --l-planned: #aab4be;
    --l-unsupported: #ee9393;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.6;
}

.skip {
  position: absolute;
  left: -999rem;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  background: var(--bg);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
}

header.site, main, footer.site {
  max-width: 46rem;
  margin: 0 auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

header.site {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  padding-top: 1.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.875rem;
}

.wordmark {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  color: var(--fg);
  text-decoration: none;
}

header.site nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
}

header.site nav a { color: var(--fg-muted); text-decoration: none; }
header.site nav a:hover { color: var(--accent); }
header.site nav a[aria-current="page"] { color: var(--fg); text-decoration: underline; text-underline-offset: 0.25em; }

main { padding-top: 2.25rem; padding-bottom: 2.5rem; }

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--accent-hover); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

h1, h2, h3 {
  font-family: var(--sans);
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.005em;
}
h1 { font-size: 1.7rem; margin: 0 0 1rem; }
h2 { font-size: 1.2rem; margin: 2.4rem 0 0.6rem; padding-top: 0.2rem; }
h3 { font-size: 1.02rem; margin: 1.6rem 0 0.4rem; }

p, ul, ol, dl, table, pre { margin: 0 0 1rem; }
ul, ol { padding-left: 1.3rem; }
li { margin: 0.2rem 0; }

.lead { font-size: 1.3rem; line-height: 1.45; margin-bottom: 0.9rem; }
.lead strong { font-weight: 600; }
.sub { color: var(--fg-muted); }

code, pre, kbd, .mono { font-family: var(--mono); font-size: 0.86em; }
code { overflow-wrap: anywhere; }

pre {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
  line-height: 1.45;
  font-size: 0.82rem;
  tab-size: 8;
}

.terminal figcaption, .note, .provenance {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--fg-muted);
}

figure { margin: 0 0 1.25rem; }
figure.terminal figcaption { margin-top: 0.4rem; }

/* Labels: the text carries the meaning; colour only repeats it. */
.label {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.3;
  padding: 0.05rem 0.35rem;
  border: 1px solid currentColor;
  border-radius: 3px;
  vertical-align: 0.12em;
  white-space: nowrap;
}
.l-mq { color: var(--l-mq); }
.l-rq { color: var(--l-mq); }
.l-val { color: var(--l-cq); }
.l-exp { color: var(--l-exp); }
.l-planned { color: var(--l-planned); }
.l-unsupported { color: var(--l-unsupported); }

/* Status block on the home page and fact lists elsewhere. */
.facts {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.9rem 1.1rem 0.3rem;
  margin: 1.5rem 0;
}
.facts h2 { margin-top: 0; font-size: 1rem; }
.facts dl { display: grid; grid-template-columns: minmax(7rem, max-content) 1fr; gap: 0.3rem 1.1rem; }
.facts dt { font-family: var(--sans); font-size: 0.9rem; color: var(--fg-muted); }
.facts dd { margin: 0; }

ul.claims { list-style: none; padding-left: 0; }
ul.claims li { margin: 0.55rem 0; padding-left: 0; }
ul.claims .label { margin-right: 0.4rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
  display: block;
  overflow-x: auto;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.4rem 0.7rem 0.4rem 0;
  border-bottom: 1px solid var(--border);
}
th { font-family: var(--sans); font-weight: 600; font-size: 0.85rem; }
td.num { font-variant-numeric: tabular-nums; }

dl.terms dt { font-weight: 600; font-family: var(--sans); font-size: 0.95rem; margin-top: 0.8rem; }
dl.terms dd { margin: 0.15rem 0 0 0; }

dl.manindex { display: grid; grid-template-columns: minmax(9rem, max-content) 1fr; gap: 0.3rem 1rem; }
dl.manindex dt { font-family: var(--mono); font-size: 0.9rem; }
dl.manindex dd { margin: 0; }

.manpage h1 { font-family: var(--mono); font-weight: 600; }
pre.man { font-size: 0.8rem; background: var(--bg-inset); }
pre.man .sh { font-weight: 700; }

.receipt dt { font-family: var(--sans); font-weight: 600; font-size: 0.9rem; margin-top: 0.9rem; }
.receipt dd { margin: 0.2rem 0 0; }

footer.site {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  padding-bottom: 2.5rem;
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--fg-muted);
}
footer.site p { margin: 0 0 0.5rem; }

@media (max-width: 34rem) {
  body { font-size: 1rem; }
  h1 { font-size: 1.45rem; }
  .lead { font-size: 1.15rem; }
  .facts dl, dl.manindex { grid-template-columns: 1fr; gap: 0.1rem; }
  .facts dd, dl.manindex dd { margin-bottom: 0.5rem; }
  pre { font-size: 0.74rem; padding: 0.7rem; }
  pre.man { font-size: 0.66rem; }
}

/* The emblem on /about/: modest, never wider than the text column. */
figure.emblem { margin: 2rem 0 0; max-width: 28rem; }
figure.emblem img { display: block; width: 100%; height: auto; border-radius: 3px; }
figure.emblem figcaption { font-size: 0.85rem; color: var(--fg-muted); margin-top: 0.4rem; }