/* Can be whatever you want */
:root {
  --black: #000;
}

body {
  background-color: var(--black);
}

/* Preloader */
#preloader {
  background: var(--black)
    url("/MISC/planet.gif")
    no-repeat center;
  align-items: center;
  justify-content: center;
  width: 100%;
  display: flex;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  z-index: 9999;
}