body { margin: 0; background: #f4f6f9; color: #142030; font-family: system-ui, "Segoe UI", sans-serif; }
main { max-width: 40rem; margin: 15vh auto; padding: 0 1.25rem; line-height: 1.6; }
h1 { font-size: 2rem; margin: 0.25rem 0 1rem; }
.etiquette { font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: #1b4f9b; margin: 0; }
@media (prefers-color-scheme: dark) { body { background: #0e1520; color: #e3e9f1; } .etiquette { color: #8bb7f2; } }