body {
  font-family: "Sarabun", sans-serif;
  background-color: #f0f0f0;
  margin: 0;
  padding: 0;
}

header {
  background-color: #007bff;
  color: white;
  text-align: center;
  padding: 1.5rem 0;
}

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

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

button {
  background-color: #28a745;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #218838;
}