html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #000;
}

body {
  min-height: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 20%, #002a2a, #000);
}

div {
  padding: 0px 10px 20px;
  border-radius: 40px;
  box-shadow: 0 0 50px 50px #000;
  background: #000;
}