.icon-stacked-logo {
  background-image: url('png/stacked-logo.png');
  background-repeat: no-repeat;
}
.icon-logo {
  background-image: url('png/wide-logo.png');
  background-repeat: no-repeat;
}
.icon-search {
  background-image: url('png/search.png');
  background-repeat: no-repeat;
}
.icon-logo-mark {
  background-image: url('png/logo-mark.png');
  background-repeat: no-repeat;
}