body ::-webkit-scrollbar {
    width: 3px;
}

/* Track */
body ::-webkit-scrollbar-track {
    background: #f1f1f1;
}

/* Handle */
body ::-webkit-scrollbar-thumb {
    background: #f1f1f1;
    transition: .3s;
}

/* Handle on hover */
body ::-webkit-scrollbar-thumb:hover {
    background: #999;
}