html,
body {
  height: 100%;
}

body {
  margin: 0;
  background-color: #aeb1b8;
  background-image: radial-gradient(
      1100px 700px at 18% 12%,
      rgba(255, 255, 255, 0.55),
      rgba(255, 255, 255, 0) 65%
    ),
    radial-gradient(
      900px 600px at 78% 22%,
      rgba(255, 255, 255, 0.35),
      rgba(255, 255, 255, 0) 62%
    ),
    radial-gradient(
      1200px 800px at 50% 88%,
      rgba(0, 0, 0, 0.18),
      rgba(0, 0, 0, 0) 66%
    ),
    linear-gradient(180deg, #747981 0%, #b4b7be 50%, #6c7179 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}