* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: lightblue;
  color: #222;
  font-family: Arial, sans-serif;
}

header {
  background-color: #075985;
  color: white;
  padding: 25px;
  text-align: center;
}

nav {
  margin-top: 15px;
}

nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
  font-weight: bold;
}

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

main {
  max-width: 800px;
  margin: 35px auto;
  padding: 25px;
  background-color: white;
  border-radius: 10px;
}

.card {
  background-color: #e0f2fe;
  padding: 20px;
  margin-top: 20px;
  border-radius: 8px;
}

footer {
  background-color: #075985;
  color: white;
  text-align: center;
  padding: 18px;
  margin-top: 40px;
}