body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background-color: #111;
  color: #fff;
  padding: 20px;
  text-align: center;
}
nav a {
  color: #fff;
  margin: 0 10px;
  text-decoration: none;
}
section {
  padding: 20px;
}
footer {
  background-color: #111;
  color: #fff;
  text-align: center;
  padding: 10px;
}
form {
  display: flex;
  flex-direction: column;
}
form input, form textarea {
  margin-bottom: 10px;
  padding: 8px;
}
button {
  background-color: #007BFF;
  color: #fff;
  border: none;
  padding: 10px;
  cursor: pointer;
}