.card-marquee_item .card-content{
  background-color: rgba(7,7,7,0);
  transition: background-color .35s cubic-bezier(.16,1,.3,1);
}
.card-marquee_item .card-content .btn{
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .35s cubic-bezier(.16,1,.3,1),
              transform .35s cubic-bezier(.16,1,.3,1);
}
@media (hover: hover){
  .card-marquee_item:hover .card-content{ background-color: rgba(7,7,7,.4); }
  .card-marquee_item:hover .card-content .btn{ opacity: 1; transform: none; }
}
/* Touch: kein Hover -> dauerhaft sichtbar */
@media (hover: none){
  .card-marquee_item .card-content{ background-color: rgba(7,7,7,.4); }
  .card-marquee_item .card-content .btn{ opacity: 1; transform: none; }
}