.container {
  position: relative;
  padding-right: 50px;
  border-radius: 5px;
  padding-left: 5px;
  left: -10px;
}

.activeContainer {
  composes: container;
  cursor: pointer;
}

.activeContainer:hover {
  background: lightgray;
  transition: 1s cubic-bezier(.25,.8,.5,1);
}

.icon {
  display: none;
  position: absolute;
  right: 0;
  top: 50%;
  bottom: 0;
  transform: translateY(-25px);
}

.activeContainer:hover .icon {
  display: block;
}