:root {
  color-scheme: dark;
  --paper: #15131c;
  --surface: #1d1a26;
  --ink: #eeeaf4;
  --muted: #bcb3cb;
  --accent: #d1b6ff;
  --line: #413750;
  --wash: #332545;
  --measure: 68ch;
  font-family: system-ui, -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.6;
}

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

body {
  min-height: 100vh;
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
}

h1, h2, h3, p { margin: 0; }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }

.shell { width: min(100% - 3rem, 70rem); margin-inline: auto; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.topbar, .footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem 1.5rem;
  padding-block: .85rem;
}

.skip-link {
  position: fixed;
  z-index: 1;
  top: .75rem;
  left: .75rem;
  padding: .5rem .75rem;
  background: var(--surface);
  transform: translateY(-200%);
}
.skip-link:focus { transform: translateY(0); }

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: var(--ink);
  font-weight: 720;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: .55rem;
  background: var(--wash);
  color: var(--accent);
}

.language-nav, .document-nav { display: flex; flex-wrap: wrap; gap: .25rem; }
.language-nav { padding: .2rem; border: 1px solid var(--line); border-radius: .75rem; }
.language-nav a, .document-nav a {
  display: flex;
  align-items: center;
  min-height: 2.5rem;
  padding: .3rem .7rem;
  border-radius: .55rem;
  color: var(--muted);
  font-size: .875rem;
  font-weight: 650;
  text-decoration: none;
}
:is(.language-nav, .document-nav) a:is(:hover, [aria-current="page"]) {
  background: var(--wash);
  color: var(--accent);
}

.home, .legal { flex: 1; padding-block: clamp(1.5rem, 5vw, 3.25rem) 4rem; }
.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .75fr);
  align-items: center;
  min-height: 20rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: radial-gradient(circle at 76% 45%, #362548, #251c32 51%, #1e1928 85%);
}
.hero::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  border-radius: inherit;
  background-image: radial-gradient(circle, #8f72b7 1px, transparent 1px);
  background-size: 1.25rem 1.25rem;
  opacity: .26;
  content: "";
}
.hero-copy { padding: clamp(1.35rem, 5.5vw, 4.25rem); }
.eyebrow {
  display: flex;
  align-items: center;
  gap: .6rem;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 760;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.eyebrow span { width: .55rem; height: .55rem; background: currentColor; transform: rotate(45deg); }
.hero h1, .legal h1 {
  margin-block: .65rem .85rem;
  font-family: Georgia, "Songti TC", "Noto Serif TC", serif;
  font-size: clamp(2.25rem, 6vw, 4.75rem);
  font-weight: 500;
  letter-spacing: -.045em;
  line-height: 1.06;
  overflow-wrap: break-word;
}
:lang(zh-Hant) .hero h1 { font-weight: 700; letter-spacing: .025em; }
.hero-copy > p:not(.eyebrow), .legal-intro { max-width: 52ch; color: var(--muted); font-size: 1.06rem; }
.hero-art { width: min(100%, 25rem); height: auto; justify-self: center; }

.badge {
  width: fit-content;
  padding: .2rem .65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--wash);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
}
.legal-header {
  padding-block: .25rem 2rem;
  border-bottom: 1px solid var(--line);
}
.back-link { display: inline-block; margin-bottom: 1.5rem; font-size: .9rem; font-weight: 650; }
.legal-header .badge { margin-bottom: .65rem; }
.legal-intro { max-width: var(--measure); }
.document-layout {
  display: grid;
  grid-template-columns: minmax(12rem, 15rem) minmax(0, var(--measure));
  gap: 1.5rem clamp(1.5rem, 5vw, 4.5rem);
  align-items: start;
  padding-top: 2rem;
}
.toc { padding: 1rem 1.15rem; border: 1px solid var(--line); border-radius: .85rem; background: var(--surface); }
.toc h2 { font-size: 1rem; }
.toc ol { margin: .45rem 0 0; padding-inline-start: 1.35rem; }
.toc li { padding-inline-start: .15rem; font-size: .9rem; }
.toc a { display: inline-block; padding-block: .18rem; }
.document { overflow-wrap: break-word; }
.document section + section { margin-top: 1.65rem; padding-top: 1.45rem; border-top: 1px solid var(--line); }
.document section { scroll-margin-top: 1rem; }
.document h2 { margin-bottom: .55rem; font-size: 1.3rem; line-height: 1.3; }
.document p + p, .document li + li { margin-top: .55rem; }
.document ul { margin-block: .6rem; padding-inline-start: 1.35rem; }
.document code { padding: .08em .25em; border-radius: .2rem; background: var(--wash); color: var(--accent); font-size: .92em; }
.document dl { margin-block: .7rem 0; }
.document dt { font-weight: 700; }
.document dd { margin-inline-start: 0; margin-bottom: .55rem; color: var(--muted); }

.guide-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.35rem; }
.guide-actions a {
  display: inline-block;
  padding: .45rem .7rem;
  border: 1px solid var(--line);
  border-radius: .55rem;
  background: var(--surface);
  font-size: .875rem;
  font-weight: 650;
  text-decoration: none;
}
.guide-actions a:hover { border-color: var(--accent); }
.guide-actions a:first-child { background: var(--wash); }
.guide-layout { padding-top: 2.5rem; }
.guide-nav ul { margin: .45rem 0 0; padding: 0; list-style: none; }
.guide-nav a { padding: .2rem .15rem; }
.command-entry {
  margin-top: 1rem;
  padding: clamp(.85rem, 2.5vw, 1.25rem);
  border: 1px solid var(--line);
  border-radius: .85rem;
  background: var(--surface);
  scroll-margin-top: 1rem;
}
.command-entry h3 { margin-bottom: .5rem; font-size: 1.05rem; }
.command-options dt { margin-top: .8rem; }
.command-options dd { margin-top: .15rem; }
.option-status, .command-example { color: var(--muted); font-size: .875rem; }
.option-status { margin-inline-start: .35rem; font-weight: 500; }
.command-entry .command-example { margin-top: .85rem; }

@media (min-width: 45.01rem) {
  .guide-nav { position: sticky; top: 1rem; max-height: calc(100vh - 2rem); overflow: auto; }
}

.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
.footer-inner { padding-block: 1rem; }
.footer-inner > span:first-child { font-weight: 700; }
.footer-links { display: flex; flex-wrap: wrap; gap: .25rem 1rem; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--accent); }

@media (max-width: 45rem) {
  .document-layout { grid-template-columns: minmax(0, 1fr); }
  .hero { min-height: auto; }
}

@media (max-width: 34rem) {
  .shell { width: calc(100% - 2rem); }
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero-copy { padding-bottom: .15rem; }
  .hero-art { width: min(75%, 14rem); }
}

@media print {
  :root {
    color-scheme: light;
    --paper: #fff;
    --ink: #15131c;
    --muted: #453c52;
    --accent: #4f2a80;
    --line: #d7d0df;
    --wash: #f3edf9;
  }
  .site-header, .site-footer, .skip-link, .back-link, .toc { display: none; }
  .legal { width: auto; padding: 0; }
  .document-layout { display: block; }
  .document h2 { break-after: avoid; }
}