body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
}
header, footer {
  background: #0a3d62;
  color: white;
  padding: 20px;
  text-align: center;
}
nav {
  background: #3c6382;
  padding: 10px;
  text-align: center;
}
nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
}
section {
  padding: 20px;
}
.block {
  margin-bottom: 30px;
  background: white;
  padding: 20px;
  border-radius: 10px;
}
h1, h2, h3 {
  color: #0a3d62;
}
.button {
  background-color: #38ada9;
  color: white;
  padding: 10px 15px;
  text-decoration: none;
  border-radius: 5px;
  display: inline-block;
}