body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #f7f7f7;
  color: #222;
  line-height: 1.6;
}
h1, h2, h3, h4 {
  color: #0d1a40;
}
a {
  color: #004080;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
header {
  background-color: #0d1a40;
  color: white;
  padding: 2rem 1rem;
  text-align: center;
}
button {
  background-color: gold;
  color: black;
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}