@media screen and (max-width: 1099px) {
    div#main_nav {
        max-height: calc(100vh - 130px);
        overflow-x: hidden;
        overflow-y: auto;
        padding-right: 25px;
    }

    div#main_nav::-webkit-scrollbar {
        width: 10px;
    }

    div#main_nav::-webkit-scrollbar-track {
        background: #61269d;
        border-radius: 20px;
    }

    div#main_nav::-webkit-scrollbar-thumb {
        background-color: #fff;
        border-radius: 20px;
        border: 3px solid #61269d;
    }
}