:root{color-scheme:light dark}*{box-sizing:border-box}body{margin:0;padding:24px;font-family:DM Sans,Segoe UI,system-ui,sans-serif;background:var(--page-bg, #ffffff);color:var(--page-fg, #1a1a1a)}@media (prefers-color-scheme: dark){body{--page-bg: #0f172a;--page-fg: #e5e7eb}}main{max-width:1100px;margin:0 auto}