:root {
  --bg: #ffffff;
  --surface: #f5f5f7;
  --ink: #1c1c1e;
  --muted: #6b6b70;
  --accent: #2f5d4a;
  --hairline: #e3e3e6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131315;
    --surface: #1e1e21;
    --ink: #f2f2f4;
    --muted: #a0a0a6;
    --accent: #7fb79f;
    --hairline: #2e2e33;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 20px 80px;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 720px; margin: 0 auto; }

header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 40px;
}

header a.home {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

nav { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 18px; }
nav a { color: var(--accent); text-decoration: none; font-size: 15px; }
nav a:hover { text-decoration: underline; }

h1 { font-size: 32px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 20px; letter-spacing: -0.01em; margin: 40px 0 12px; }
h3 { font-size: 17px; margin: 28px 0 8px; }

p, li { color: var(--ink); }
ul { padding-left: 22px; }
li { margin-bottom: 8px; }

.lede { font-size: 19px; color: var(--muted); margin: 0 0 32px; }
.updated { color: var(--muted); font-size: 15px; margin: 0 0 40px; }

a { color: var(--accent); }

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px 22px;
  margin: 16px 0;
}
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  color: var(--muted);
  font-size: 14px;
}
footer a { color: var(--muted); }

table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--hairline); vertical-align: top; }
th { font-weight: 600; }