:root {
  --mint: #5cc7a6;
  --ink: #26292f;
  --muted: #737a85;
  --bg: #faf8f2;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #edeff1;
    --muted: #9ea5ae;
    --bg: #17191c;
    --card: #232629;
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 24px 96px; }
header { margin-bottom: 40px; }
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.brand-dot {
  width: 40px; height: 40px; border-radius: 12px; background: var(--mint);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.brand a { color: var(--ink); text-decoration: none; font-weight: 700; font-size: 18px; }
h1 { font-size: 32px; margin-bottom: 8px; letter-spacing: -0.02em; }
h2 { font-size: 20px; margin: 32px 0 8px; letter-spacing: -0.01em; }
p, li { color: var(--ink); margin-bottom: 12px; }
ul { padding-left: 22px; margin-bottom: 12px; }
.meta { color: var(--muted); font-size: 14px; }
a { color: #2f9c78; }
nav.footer { margin-top: 56px; padding-top: 24px; border-top: 1px solid rgba(128,128,128,0.25);
  display: flex; gap: 20px; font-size: 14px; }
.card { background: var(--card); border-radius: 16px; padding: 24px; margin: 16px 0; }