:root {
  --bg: #fbfaf7;
  --fg: #1d2030;
  --muted: #5a5f73;
  --border: #dcdce6;
  --accent: #3b3fb5;
  --accent-fg: #ffffff;
  --note-bg: #fff6df;
  --note-border: #c98a00;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12131c;
    --fg: #ecedf5;
    --muted: #a6aabf;
    --border: #2b2d40;
    --accent: #9aa0ff;
    --accent-fg: #12131c;
    --note-bg: #2a2412;
    --note-border: #d9a520;
    --card: #1a1c2a;
  }
}
:root { color-scheme: light dark; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 1rem/1.7 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.skip {
  position: absolute; left: 1rem; top: -4rem; padding: .5rem 1rem;
  background: var(--accent); color: var(--accent-fg); z-index: 10;
}
.skip:focus { top: 1rem; }
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1rem; }
header.site { border-bottom: 1px solid var(--border); }
header.site .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: .5rem 1.5rem; padding-top: .9rem; padding-bottom: .9rem;
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; }
nav.main ul { list-style: none; display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; margin: 0; padding: 0; }
nav.main a { display: inline-block; padding: .4rem 0; color: var(--fg); }
nav.main a[aria-current="page"] { color: var(--accent); font-weight: 600; }
main { padding: 2rem 0 3rem; }
h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); line-height: 1.2; margin: 0 0 .5rem; }
h2 { font-size: 1.3rem; line-height: 1.3; margin: 2rem 0 .5rem; }
p, ul, ol { margin: .6rem 0; }
ul, ol { padding-left: 1.4rem; }
li { margin: .3rem 0; }
.meta { color: var(--muted); font-size: .9rem; margin: 0 0 1rem; }
.lead { font-size: 1.1rem; color: var(--muted); }
.note {
  background: var(--note-bg); border: 1px solid var(--note-border); border-radius: .5rem;
  padding: .75rem 1rem; margin: 1rem 0; font-size: .95rem;
}
.toc { border: 1px solid var(--border); border-radius: .5rem; padding: .25rem 1rem; margin: 1.25rem 0; }
.toc summary { cursor: pointer; font-weight: 600; padding: .5rem 0; }
.toc ul { list-style: none; padding: 0 0 .5rem; }
.cards { display: grid; gap: 1rem; margin: 1.5rem 0; }
@media (min-width: 40rem) { .cards { grid-template-columns: 1fr 1fr; } }
.card { background: var(--card); border: 1px solid var(--border); border-radius: .75rem; padding: 1rem 1.25rem; }
.card h2 { margin-top: 0; font-size: 1.1rem; }
.card p { margin: .4rem 0; }
.break { overflow-wrap: anywhere; }
address { font-style: normal; }
footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; }
footer.site .wrap { padding-top: 1.25rem; padding-bottom: 2rem; }
footer.site ul { list-style: none; display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; padding: 0; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }