body {
  font-family: "Segoe UI", system-ui, sans-serif;
  max-width: 860px;
  margin: 0 auto;
  padding: 2rem;
  color: #111;
  background: #fff;
  line-height: 1.7;
}

h1 { font-size: 2rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.5rem; }
h3 { font-size: 1rem; margin-bottom: 0.25rem; }
p  { margin-bottom: 1rem; }

a { color: #111; }