:root { --bg: #fbfbf9; --ink: #1d2126; --muted: #5b6470; --rule: #dcdfe3; --link: #1f5f8b; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #15181c; --ink: #e3e6ea; --muted: #9aa3ae; --rule: #2c3138; --link: #8cc0e6; }
}
body { margin: 0; background: var(--bg); color: var(--ink);
       font: 17px/1.6 Georgia, "Times New Roman", serif; }
main { max-width: 42rem; margin: 0 auto; padding: 3rem 1rem 4rem; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .4rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .4rem; }
p, li { margin: .5rem 0; }
.meta { color: var(--muted); font-size: .95rem; margin: 0 0 2rem; }
a { color: var(--link); }
nav { border-top: 1px solid var(--rule); margin-top: 3rem; padding-top: 1rem; font-size: .95rem; }
nav a { margin-right: 1.2rem; }