html {
  font: 1em Helvetica, Tahoma;
  color: darkgrey;
}
.centered {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
#logo {
  background: url(badcat4.png) center center / contain no-repeat;
  width: 100vw;
  height: 45px;
  margin: 10px;
}
#logo {
  background: url(badcat4.png) center center / contain no-repeat;
  width: 120vw;
  height: 80px;
  margin: 10px;
}