:root { --bg: #ffffff; --fg: #15231d; --muted: #5b6b64; --accent: #0b4f3a; --rule: #e3e8e5; }
@media (prefers-color-scheme: dark) { :root { --bg: #101614; --fg: #e8efeb; --muted: #9fb0a8; --accent: #7fc8ad; --rule: #243029; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; }
header .mark { width: 40px; height: 40px; border-radius: 10px; background: var(--accent); display: grid; place-items: center; color: #fff; font-weight: 700; }
header a { color: var(--fg); text-decoration: none; font-weight: 600; }
nav a { color: var(--accent); margin-right: 16px; }
h1 { font-size: 1.8rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 32px 0 8px; }
p.meta { color: var(--muted); margin: 0 0 24px; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 40px 0; }
footer { color: var(--muted); font-size: 0.9rem; margin-top: 48px; }
li { margin: 6px 0; }
a { color: var(--accent); }