body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: #1a1a1a; line-height: 1.5; }
main, footer { max-width: 720px; margin: 0 auto; padding: 24px 16px; }
footer { color: #666; font-size: 14px; }
a { color: #1a56db; }