body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: url('../images/background.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #333;
}
header {
  background: #0056b3;
  color: white;
  padding: 15px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
nav a {
  color: white;
  text-decoration: none;
  margin-left: 20px;
  font-weight: bold;
}
nav a:hover {
  text-decoration: underline;
}
main {
  max-width: 900px;
  margin: 30px auto;
  background: white;
  padding: 30px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  border-radius: 6px;
}
footer {
  text-align: center;
  padding: 15px;
  background: #0056b3;
  color: white;
  position: fixed;
  bottom: 0; left: 0; right: 0;
}