@supports not selector(::-webkit-scrollbar) {
  scrollbar-color: rgba(0, 0, 0, 0.8) transparent;
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 7px;
}
::-webkit-scrollbar-track {
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
}
::-webkit-scrollbar-thumb {
  background-color: darkslategray;
  outline: 1px solid slategrey;
  border-radius: 99px;
}
::webkit-scrollbar-thumb:hover {
  background-color: slategray;
}