body { font-family: system-ui, sans-serif; max-width: 42rem; margin: 3rem auto; padding: 0 1rem; line-height: 1.6; color: #1a1a1a; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
nav a { margin-right: 1rem; }
footer { margin-top: 3rem; font-size: 0.9rem; color: #555; }