:root { color-scheme: dark; }
body { margin: 0; background: #0d1017; color: #f2f4f8; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; line-height: 1.55; }
main { max-width: 640px; margin: 0 auto; padding: 48px 24px 64px; }
h1 { font-size: 2rem; letter-spacing: 0.06em; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
p, li { color: #d5d9e3; }
.dim { color: #8b93a7; }
a { color: #3ae6ce; }
nav a { margin-right: 18px; }
ul { padding-left: 20px; }