* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background: #f5f7fa;
  color: #333;
}

header {
  background: #0a3d44;
  color: #fff;
  padding: 20px;
  text-align: center;
}

main {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

section {
  margin-bottom: 25px;
}

h2 {
  color: #0a3d44;
}

footer {
  text-align: center;
  padding: 15px;
  background: #eaeaea;
}

footer a {
  color: #0a3d44;
  text-decoration: none;
  font-weight: bold;
  margin: 0 5px;
}

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