html{color-scheme:light dark;font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f5f5f7;color:#202124}body{margin:0}main,nav,footer{max-width:850px;margin:auto;padding:24px}nav{display:flex;gap:24px;border-bottom:1px solid #bbb}a{color:#0069cf}h1{font-size:38px;line-height:1.2}h2{font-size:23px;margin-top:32px}.note{background:#e8edf3;padding:18px;border-radius:14px}.lang{border-top:1px solid #bbb;margin-top:44px;padding-top:24px}footer{font-size:14px;color:#666}@media(prefers-color-scheme:dark){html{background:#151619;color:#eee}a{color:#79b7ff}.note{background:#252b35}footer{color:#bbb}}