:root{color:#1d2733;background:#f5f7fa;font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.5}@media (prefers-color-scheme:dark){:root{color:#e3e8ef;background:#151b23}}main{max-width:40rem;margin:4rem auto;padding:0 1.5rem}h1{margin-bottom:.5rem;font-size:2.25rem}.error{color:#b3261e}