:root { color-scheme: light dark; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
       background: Canvas; color: CanvasText; line-height: 1.55; }
main { max-width: 40rem; margin: 0 auto; padding: 3rem 1.25rem; }
main.start { min-height: 100vh; box-sizing: border-box; display: flex; flex-direction: column;
             justify-content: center; text-align: center; padding-top: 0; padding-bottom: 0; }
h1 { font-size: 1.75rem; margin: 0 0 .75rem; overflow-wrap: anywhere; }
h2 { font-size: 1.1rem; margin: 2rem 0 .5rem; }
.start p { margin: 0 0 2rem; opacity: .8; }
footer { font-size: .875rem; margin-top: 2.5rem; }
a { color: inherit; }