:root {
  --bg: #ffffff;
  --fg: #1c2024;
  --muted: #6b7280;
  --accent: #2563eb;
  --border: #e6e8eb;
  --card: #f7f8fa;
  --maxw: 44rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e6e8eb;
    --muted: #9aa1ac;
    --accent: #7aa7ff;
    --border: #262b33;
    --card: #161a20;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }

header.site { border-bottom: 1px solid var(--border); padding: 1.4rem 0; }
header.site .wrap { display: flex; align-items: baseline; gap: .6rem; }
header.site .name { font-weight: 700; letter-spacing: -0.01em; }
header.site .name a { color: inherit; }
header.site .kind { color: var(--muted); font-size: .95rem; }

main { padding: 2.5rem 0 1rem; }
h1 { font-size: 1.9rem; letter-spacing: -0.02em; margin: 0 0 .3rem; }
.updated { color: var(--muted); font-size: .9rem; margin: 0 0 1.5rem; }

h2 {
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  margin: 2.6rem 0 .5rem;
  padding-top: .4rem;
  scroll-margin-top: 1.5rem;
}
p { margin: .8rem 0; }
ul { padding-left: 1.3rem; margin: .8rem 0; }
li { margin: .35rem 0; }
strong { font-weight: 650; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.toc {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0 2.5rem;
  font-size: .92rem;
}
.toc-title { font-weight: 650; margin: 0 0 .5rem; }
.toc ol { margin: 0; padding-left: 1.2rem; columns: 2; column-gap: 2rem; }
.toc li { margin: .22rem 0; }
.toc a { color: var(--fg); }

footer.site {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding: 1.4rem 0 3rem;
  color: var(--muted);
  font-size: .9rem;
}
footer.site .wrap { display: flex; flex-wrap: wrap; gap: .35rem 1.5rem; justify-content: space-between; }

@media (max-width: 480px) { .toc ol { columns: 1; } }
@media print {
  header.site, footer.site, .toc { display: none; }
  a { color: inherit; text-decoration: none; }
  body { color: #000; }
}

/* Support page */
h3 { font-size: 1rem; letter-spacing: -0.005em; margin: 1.8rem 0 .3rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  margin: 1.25rem 0 2rem;
}
.card > :first-child { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }
.email { font-size: 1.2rem; font-weight: 650; }
.facts { list-style: none; padding: 0; }
.facts li { display: flex; flex-wrap: wrap; gap: 0 .5rem; margin: .3rem 0; }
.facts b { font-weight: 650; min-width: 9rem; }