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

header {
  background-color: #333;
  color: white;
  padding: 10px;
  text-align: center;
}

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

main {
  padding: 20px;
  text-align: center;
}

form {
  display: flex;
  flex-direction: column;
  width: 300px;
  margin: 0 auto;
}

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

button {
  background-color: #333;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #555;
}