@media screen and (max-width: 768px) {
    .box {
        margin-bottom: 100px;

        & .navbar {
            position: fixed;
            bottom: 0;
            left: 0px;
            width: 100%;
            justify-content: center;
            background-color: #fff;
            padding-top: 5px;
            box-shadow: 0 -5px 3px 0 #FEDC00;
            z-index: 10;
        }
    }
}