body {
  background: linear-gradient(203deg, #1d1e1e, #393939, #3c3a3a);
  background-size: 600% 600%;
  -webkit-animation: gradient 8s ease infinite;
  -moz-animation: gradient 8s ease infinite;
  -o-animation: gradient 8s ease infinite;
  animation: gradient 8s ease infinite;
}

@keyframes gradient {
  0% {
    background-position: 86% 0%;
  }
  50% {
    background-position: 15% 100%;
  }
  100% {
    background-position: 86% 0%;
  }
}

a:hover {
  text-decoration: none;
}