div {
  align-items: center;
  text-align: center;
  border-radius: 25px;
  height: 300px;
  width: 1000px;
  background: linear-gradient(to bottom, #000000 0%, #020094 100%);
}

body {
  background-image: url("https://www.bridalmakeup.com.au/wp-content/uploads/2017/09/bg-purple-pink-gradient.jpg");
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}