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

header {
  background: #0a74da;
  color: #fff;
  padding: 20px;
  text-align: center;
}

nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
}

main {
  padding: 20px;
}

form {
  display: flex;
  flex-direction: column;
  max-width: 400px;
}

form input, form textarea, form button {
  margin: 10px 0;
  padding: 10px;
}