#particles-js {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

#background {
  position: fixed;
  inset: 0;
  background-color: #fff;
  opacity: 1;
  z-index: 9999;
  transition: opacity 10s;
}

#background.transparent {
  opacity: 0;
  z-index: -1;
}

#logo {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 260px;
  max-width: 70vw;
  transform: translate(-50%, -50%);
  opacity: 0;
  z-index: 99999;
  animation: fade-in 2s forwards;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fade-out {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}