:root {
  --bg: #fbfaf7;
  --text: #1d1c1a;
  --muted: #6b6862;
  --line: #e6e2da;
  --accent: #c2410c;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141312;
    --text: #ecebe8;
    --muted: #9c988f;
    --line: #2b2926;
    --accent: #fb923c;
    --card: #1b1a18;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", 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 {
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { font-weight: 700; font-size: 19px; letter-spacing: -0.01em; color: var(--text); }
.brand:hover { text-decoration: none; }
nav a { color: var(--muted); margin-left: 20px; font-size: 15px; }
nav a:hover { color: var(--text); text-decoration: none; }
main { padding: 64px 0 80px; }
h1 { font-size: 40px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 24px; letter-spacing: -0.01em; margin: 48px 0 12px; }
h3 { font-size: 18px; margin: 28px 0 8px; }
p, li { color: var(--text); }
.lead { font-size: 20px; color: var(--muted); margin: 0 0 40px; }
.muted { color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px;
  margin: 24px 0;
}
.card h2 { margin-top: 0; }
.tag {
  display: inline-block; font-size: 13px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; margin-left: 8px;
  vertical-align: middle;
}
ul { padding-left: 22px; }
footer.site { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 14px; color: var(--muted); }
footer.site a { color: var(--muted); margin-right: 18px; }
@media (max-width: 520px) {
  h1 { font-size: 32px; }
  nav a { margin-left: 14px; }
  .card { padding: 20px; }
}