.coupon-container {
  text-align: center;

  width: 500px;
  margin: 20px auto;
}

.coupon-container input {
  font-size: 20px;
  text-align: center;
}

.coupon-container button {
  margin-top: 10px;

  width: 100%;
  background-color: #004f9f;
}

#code-error,
#code-success {
  margin-top: 10px;
}