custom scrollbar ::-webkit-scrollbar

custom_scrollbar.css

/* total width */
::-webkit-scrollbar {
  width: 14px;
}

::-webkit-scrollbar-track {
  box-shadow: inset 0 0 14px 14px transparent;
  border: solid 4px transparent;
}

::-webkit-scrollbar-thumb {
  box-shadow: inset 0 0 14px 14px #bbbbbe;
  border: solid 4px transparent;
  border-radius: 14px;
}

/* set button(top and bottom of the scrollbar) */
::-webkit-scrollbar-button {
  display: none;
}