body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

header {
  background-color: #00274d; /* Dark blue background */
  color: white; /* White text */
  padding: 1rem;
  text-align: center;
}

main {
  max-width: 800px; /* Single column width */
  margin: 2rem auto; /* Centered with margins on large screens */
  padding: 0 1rem; /* Padding for smaller screens */
}