/* Base layout */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  max-width: 720px;
  margin: 4rem auto;
  padding: 0 1.25rem;
  color: #1f2937;
  background-color: #ffffff;
}

/* Headings */
h1, h2, h3 {
  line-height: 1.25;
}

h1 {
    margin-top: 0;
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
}

h2 {
  margin-top: 3rem;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 0.25rem;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2.5rem;
}

/* Links */
a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Lists */
ul {
  padding-left: 1.25rem;
}

/* Subtle emphasis */
strong {
  font-weight: 600;
}