body {
  position: relative;
  margin: 0;
  z-index: 0;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("img/packetarena_bkgr.png") no-repeat center/cover;
  opacity: 0.2; /* 80% transparent = 0.2 visible */
  z-index: -1;
}
img {
	border-radius: 5px;
	opacity: 0.8;
}
a:hover{
}