body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  color: #0f172a;
  background: #f8fafc;
  margin: 0;
}
h1, h2, h3 { 
  line-height: 1.2;
  margin: 0 0 .75em;
}
p { 
  font-size: 1.125rem;
  line-height: 1.7;
  margin: 0 0 1.5em;
}
a {
  color: #2563eb;
  text-decoration: none;
}
a:hover { text-decoration: underline; }
h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: 2rem; }
header.hero, main, footer.site-footer, section { padding: 16px; }