:root { --ink: #1c2b2a; --muted: #5b6b69; --accent: #0f9b8e; --bg: #ffffff; --code: #eef4f3; }
@media (prefers-color-scheme: dark) {
  :root { --ink: #e6efee; --muted: #9db0ad; --accent: #3cc7b8; --bg: #121a19; --code: #1c2827; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 2rem; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 2rem 0 .4rem; }
.meta { color: var(--muted); margin-top: 0; }
.back { margin: 0 0 1.5rem; font-size: .9rem; }
a { color: var(--accent); }
ul { padding-left: 1.25rem; }
li { margin: .3rem 0; }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: .9em; }