:root {
  --paper: #f7f6f2;
  --ink: #16191d;
  --muted: #5b6168;
  --line: #dedbd2;
  --accent: #0e6b68;
  --accent-ink: #ffffff;
  --max: 40rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121417;
    --ink: #ecebe6;
    --muted: #9aa0a6;
    --line: #2a2e33;
    --accent: #5cc4bd;
    --accent-ink: #0b1514;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--paper); padding: 0.5rem 0.75rem; }
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
header.site { padding: 2rem 0 0; }
.mark {
  display: inline-grid; place-items: center;
  width: 2.75rem; height: 2.75rem; border-radius: 0.6rem;
  background: var(--ink); color: var(--paper);
  font-weight: 700; letter-spacing: 0.02em; text-decoration: none;
}
main { flex: 1; padding: 4.5rem 0 3rem; }
h1 { font-size: clamp(2.25rem, 6vw, 3.25rem); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 1rem; }
h2 { font-size: 1.25rem; margin: 2.5rem 0 0.5rem; }
.lead { font-size: 1.25rem; color: var(--muted); margin: 0 0 2rem; max-width: 34rem; }
.links { display: flex; flex-wrap: wrap; gap: 0.75rem; list-style: none; padding: 0; margin: 0; }
.btn {
  display: inline-block; padding: 0.7rem 1.1rem; border-radius: 0.5rem;
  border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 600;
}
.btn:hover { border-color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.prose p, .prose li { max-width: 36rem; }
.note { color: var(--muted); font-size: 0.95rem; }
footer.site { border-top: 1px solid var(--line); padding: 1.25rem 0 2rem; color: var(--muted); font-size: 0.9rem; }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; justify-content: space-between; }
footer.site nav { display: flex; gap: 1.25rem; }
footer.site a { color: var(--muted); }