.carthighlight::after{
  content: "";
  position:absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background-color: white;
  z-index: -1;
}

.carthighlight::before{
  content: "";
  background: linear-gradient(45deg, #7bad42, #ceb641, #535794, #00ffd5, #ff00c8,
  #df7676);
  position:absolute;
  width: calc(100% + 8px);
  height: calc(100% + 8px);
  filter: blur(8px);
  border-radius: inherit;
  opacity: 1;
  z-index: -1;
  animation: glowing 20s linear infinite;
  transition: opacity .3s ease-in-out;
  background-size: 600%;
}

@keyframes glowing{
  0% {background-position: 0 0;}
  50% {background-position: 400% 0;}
  100% {background-position: 0 0;}
}

/* .carthighlight:active::before, .carthighlight:hover::before{
  opacity: 1;
} */