body {
  background-color: #121212;
}

body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 70%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
  animation: flotando 20s linear infinite;
  z-index: -1;
}


@keyframes flotando {
  0% {
    background-position: 0% 0%;
  }
  100% {
    background-position: 100% 100%;
  }
}