.crt::after {
  content: " ";
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(18, 16, 16, 0.1);
  opacity: 0;
  z-index: 2;
  pointer-events: none;
}
.crt::before {
  content: " ";
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
  z-index: 2;
  background-size: 100% 2px, 3px 100%;
  pointer-events: none;
}
/* width */
::-webkit-scrollbar {
  width: 10px;
}
/* Track */
::-webkit-scrollbar-track {
  background: yellow; 
  border-radius: 10px;
}
/* Handle */
::-webkit-scrollbar-thumb {
  background: blue; 
  border-radius: 10px;
}
/* Handle on hover */
::-webkit-scrollbar-thumb:hover {
  background: red; 
  border-radius: 10px;
}