.buttons-container {
  text-align: center;
  margin-top: 20px;
}

button {
  background-color: #4CAF50; /* Màu xanh */
  color: white;
  padding: 15px 32px;
  font-size: 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin: 10px;
}

button:hover {
  background-color: #45a049; /* Màu xanh đậm hơn khi hover */
}
body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
}

header {
  background-color: #333;
  color: white;
  padding: 20px;
  text-align: center;
}

footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 10px;
  position: fixed;
  bottom: 0;
  width: 100%;
}