body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f8f9fa;
  color: #333;
}
header {
  background: #0d1b2a;
  color: #f4d35e;
  padding: 1em;
  text-align: center;
}
nav {
  background: #1d3557;
  text-align: center;
}
nav a {
  color: white;
  text-decoration: none;
  margin: 0 15px;
  display: inline-block;
  padding: 1em;
}
nav a:hover {
  background: #457b9d;
}
main {
  padding: 1em 2em;
}
footer {
  background: #0d1b2a;
  color: white;
  text-align: center;
  padding: 1em;
}
.cover-image {
  max-width: 100%;
  height: auto;
  display: block;
  margin: auto;
}