body{font-family:system-ui,Segoe UI,Arial,sans-serif;max-width:42rem;margin:2rem auto;padding:0 1rem;line-height:1.6;color:#1b1b1b;background:#fff}
h1,h2{line-height:1.25}nav a{margin-right:1rem}footer{margin-top:2rem;color:#555;font-size:.9rem}
@media (prefers-color-scheme:dark){body{background:#151515;color:#eee}a{color:#8ab4f8}footer{color:#aaa}}