header {
  background-image: linear-gradient(90deg, #00c6ff, #478de3);
  color: white;
  padding: 12px;
  text-align: center;
}

header h1 {
  margin-bottom: 0.5rem;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
}