body { max-width: 760px; margin: 40px auto; padding: 0 20px; font-family: system-ui, sans-serif; line-height: 1.6; color: #1a1a1a; }
h1, h2, h3 { line-height: 1.3; }
a { color: #2563eb; }
hr { border: none; border-top: 1px solid #ddd; margin: 2em 0; }