body { margin: 0; font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; color: #1b2533; background: #fff; }
main { max-width: 640px; margin: 0 auto; padding: 48px 16px; }
h1 { color: #042044; font-size: 1.7rem; line-height: 1.2; }
h2 { color: #042044; font-size: 1.15rem; margin-top: 2em; }
a { color: #012c62; }