@mixin scroll-bar() {

    /* width */
    &::-webkit-scrollbar {
        width: 20px;
    }

    /* Track */
    &::-webkit-scrollbar-track {
        box-shadow: inset 0 0 5px grey;
        border-radius: 10px;
    }

    /* Handle */
    &::-webkit-scrollbar-thumb {
        background: red;
        border-radius: 10px;
    }

    /* Handle on hover */
    &::-webkit-scrollbar-thumb:hover {
        background: #b30000;
    }

}