:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #4a4a4a;
  --link: #0b4f8a;
  --link-hover: #073761;
  --border: #d4d4d4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.125rem;
  line-height: 1.6;
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -4rem;
  padding: 0.5rem 1rem;
  background: var(--text);
  color: var(--bg);
  z-index: 10;
}

.skip-link:focus {
  top: 0.5rem;
}

.site-header,
main,
.site-footer {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
}

main {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.375rem;
  line-height: 1.3;
  margin: 2rem 0 0.5rem;
}

.lead {
  font-size: 1.25rem;
  color: var(--muted);
}

a {
  color: var(--link);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--link-hover);
}

a:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 2px;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}