body { font: 16px/1.5 system-ui, sans-serif; margin: 2rem auto; max-width: 40rem; padding: 0 1rem; color: #1d2433; }
header { display: flex; align-items: center; gap: 1rem; }
h1 { font-size: 1.5rem; }
a { color: #2457d6; }