:root { color-scheme: light dark; font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif; line-height: 1.85; }
body { max-width: 760px; margin: auto; padding: 24px; color: #20242c; background: #f4f5f7; }
header { padding: 16px 0 28px; border-bottom: 1px solid #bbc2cd; }
nav { display: flex; flex-wrap: wrap; gap: 12px 24px; }
a { color: #1757a6; text-underline-offset: .2em; }
a:focus-visible { outline: 3px solid #1757a6; outline-offset: 4px; }
main { padding: 24px 0; }
h1 { font-size: 2rem; line-height: 1.4; }
h2 { font-size: 1.3rem; margin-top: 2em; }
p, li { overflow-wrap: anywhere; }
footer { border-top: 1px solid #bbc2cd; padding: 20px 0; font-size: .875rem; }
@media (prefers-color-scheme: dark) { body { color: #f2f3f5; background: #17181c; } a { color: #a3c8ff; } }