:root {
  --max: 1100px;
  --pad: 16px;
  --border: rgba(0,0,0,0.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.5;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px var(--pad);
}

.site-header {
  position: sticky;
  top: 0;
  background: white;
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 12px var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { font-weight: 700; text-decoration: none; color: inherit; }
.nav-links a {
  margin-left: 12px;
  text-decoration: none;
  color: inherit;
  opacity: 0.85;
}
.nav-links a:hover { opacity: 1; text-decoration: underline; }

.site-footer {
  border-top: 1px solid var(--border);
}