:root {
  --color-bg: #ffffff;
  --color-text: #222222;
  --color-muted: #666666;
  --color-accent: #0a6e4e;
  --max-width: 760px;
}

* {
  box-sizing: border-box;
}

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

.site-header,
.site-footer,
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  border-bottom: 1px solid #eee;
}

.site-header .logo {
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
  font-size: 1.1rem;
}

.site-header nav a {
  margin-left: 1rem;
  color: var(--color-text);
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--color-accent);
}

main h1 {
  font-size: 1.8rem;
  margin-top: 1.5rem;
}

main h2 {
  font-size: 1.3rem;
  margin-top: 2rem;
}

.site-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid #eee;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--color-muted);
}