:root {
  --brand: #2563eb;
  --brand-dark: #1e40af;
  --text: #111827;
  --muted: #4b5563;
  --background: #ffffff;
  --alt-background: #f3f4f6;
}

* {
  box-sizing: border-box;
}

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

.container {
  width: min(1100px, 92%);
  margin-inline: auto;
}

.site-header {
  padding: 18px 0;
  border-bottom: 1px solid #e5e7eb;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 800;
  text-decoration: none;
  color: var(--text);
}

nav {
  display: flex;
  gap: 18px;
}

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

.button {
  display: inline-block;
  padding: 12px 20px;
  background: var(--brand);
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}

.button:hover {
  background: var(--brand-dark);
}

.hero {
  padding: 96px 0;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 16px;
}

.hero p {
  max-width: 640px;
  margin: 0 auto 28px;
  color: var(--muted);
}

.section {
  padding: 72px 0;
}

.section.alt {
  background: var(--alt-background);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  padding: 24px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
}

.site-footer {
  padding: 28px 0;
  border-top: 1px solid #e5e7eb;
  color: var(--muted);
  text-align: center;
}