.react-error {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 80px;
  margin-top: -40px;
  margin-left: -150px;
  line-height: 40px;
  text-align: center;
  color: #999;
}

.react-error button {
  height: 30px;
  padding: 0 10px;
  line-height: 28px;
  border: 1px solid #ccc;
  background-color: #f9f9f9;
  outline: none;
  color: #999;
  border-radius: 4px;
  cursor: pointer;
}