.checkout-container {
  padding: 20px;
  max-width: 600px;
  margin: auto;
}

.form-section input,
.form-section textarea {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
}

button {
  padding: 12px;
  margin-top: 10px;
  cursor: pointer;
  width: 100%;
}