* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(120deg, #0f2027, #203a43, #2c5364);
  color: #fff;
  min-height: 100vh;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.nav-group {
  margin-bottom: 30px;
}

.nav-group h2 {
  margin-bottom: 15px;
}

.links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 15px;
}

.links a {
  background: rgba(255, 255, 255, 0.12);
  padding: 12px;
  text-align: center;
  border-radius: 8px;
  text-decoration: none;
  color: #fff;
  transition: 0.2s;
}

.links a:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

footer {
  text-align: center;
  margin-top: 50px;
  opacity: 0.7;
}