.bloginfo::after {
  content: "";
  background-image: url(../../img/cgalkulfi/cgallogo.jpg);
  position: absolute;
  background-position: center;
  background-repeat: no-repeat;
  width: 90vw;
  height: inherit;
  z-index: -1;
  opacity: 0.9;
}
@media screen and (max-width: 1398px) {
  .bloginfo::after {
    background-size: 100vw 40vw;
  }
}