:root {
  --bg: #fbfaf7;
  --ink: #1d1d1b;
  --ink2: #4a4a46;
  --muted: #7a7a74;
  --line: #e4e2dc;
  --accent: #0f766e;
  --card: #ffffff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141412;
    --ink: #ecebe6;
    --ink2: #b9b8b1;
    --muted: #87867f;
    --line: #2c2c29;
    --accent: #5eead4;
    --card: #1c1c1a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
header.site { padding: 28px 0 8px; display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
header.site .brand { font-weight: 650; letter-spacing: 0.01em; color: var(--ink); font-size: 18px; }
header.site nav a { color: var(--ink2); margin-left: 18px; font-size: 15px; }
main { padding: 36px 0 48px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 14px; letter-spacing: -0.01em; }
h2 { font-size: 21px; margin: 40px 0 10px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
p { margin: 0 0 14px; color: var(--ink2); }
p.lead { font-size: 20px; color: var(--ink); }
ul { padding-left: 20px; color: var(--ink2); }
li { margin: 4px 0; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 18px 0;
}
.card p:last-child { margin-bottom: 0; }
.tag { display: inline-block; font-size: 14px; font-weight: 500; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 1px 10px; margin-left: 8px; vertical-align: middle; }
footer.site { border-top: 1px solid var(--line); padding: 20px 0 40px; font-size: 14px; color: var(--muted); }
footer.site a { color: var(--muted); }
footer.site span + span::before { content: " · "; }
@media (max-width: 480px) {
  h1 { font-size: 28px; }
  p.lead { font-size: 18px; }
  header.site { flex-direction: column; gap: 6px; }
  header.site nav a { margin-left: 0; margin-right: 18px; }
}