I was having an issue with the scrollbars being very narrow. I used this to make them thicker:
div::-webkit-scrollbar-track {
-webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
border-radius: 15px;
}
div::-webkit-scrollbar {
width: 15px;
background-color: #F5F5F5;
}
div::-webkit-scrollbar-thumb {
border-radius: 10px;
-webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, .3);
}