:root {
  --bg: #0b1f33;
  --bg-accent: #123456;
  --card: #ffffff;
  --card-border: #d7dee6;
  --text: #1b2733;
  --muted: #5b6b7b;
  --brand: #0d6efd;
  --brand-dark: #0a58ca;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: #f4f6f9;
  line-height: 1.5;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  background: linear-gradient(135deg, var(--bg), var(--bg-accent));
  color: #fff;
  padding: 3rem 0 2.5rem;
}

.site-header h1 {
  margin: 0 0 0.25rem;
  font-size: 2rem;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 0;
  color: #b9c7d6;
}

.tiles {
  list-style: none;
  margin: 2.5rem 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.tile a {
  display: block;
  height: 100%;
  padding: 1.5rem;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}

.tile a:hover,
.tile a:focus {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(11, 31, 51, 0.12);
  border-color: var(--brand);
  outline: none;
}

.tile h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--brand-dark);
}

.tile p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: 0.85rem;
}