body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  margin: 0;
  background-color: #ffffff;
  color: #333;
  font-size: 1.1em;
  line-height: 1.5em;
}

header, footer, nav, main {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.2rem;
}

header h1 a {
  text-decoration: none;
  color: #2c3e50;
}

nav {
  background-color: #003366;
  text-align: center;
  padding: 0.5em;
}

nav ul {
  list-style: none;
  justify-content: center;
  padding: 0;
  display: flex;
  gap: 4rem;
}

nav a {
  text-decoration: none;
  color: #ffffff;
  font-size: 1.2em;
}

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

footer {
  background-color: #004080;
  color: white;
  text-align: center;
  padding: 1em 0;
  font-size: 0.9em;
  margin-top: 2em;
}