:root {
  --bg: #f4f4f8;
  --surface: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #d1d5db;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-dark);
}

header {
  position: relative;
  min-height: 320px;
  padding: 4rem 1rem;
  background-size: cover;
  background-position: center;
  color: white;
  text-align: center;
}

body:has(.site-navbar) header {
  scroll-margin-top: var(--navbar-height, 64px);
}

header h1 {
  margin: 0;
  font-size: clamp(2.4rem, 4vw, 4rem);
}

header p {
  margin: 1rem auto 0;
  max-width: 720px;
  font-size: 1rem;
  line-height: 1.75;
  opacity: 0.95;
}