body {
  margin: 0;
  font-family: sans-serif;
  background-color: #f5f5f5;
}

header {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 30px;
}

section {
  background: white;
  margin: 20px;
  padding: 20px;
  border-radius: 10px;
}

h2 {
  margin-bottom: 10px;
}

button {
  padding: 10px 15px;
  border: none;
  background-color: #333;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

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

footer {
  text-align: center;
  padding: 10px;
  color: gray;
}