.side_nav {
    height: 100%;
    width: 15vw;
    position: fixed;
    z-index: 1;
    top: 0;
    right: 0;
    background-color: #171a1d;
    overflow-x: hidden;
    padding-top: 4vh;
    transition: 0.5s;
    opacity: 0.7;
}

.side_nav a {
    padding: 3vh 1.2vw 1.2vh 2.6vw;
    text-decoration: none;
    font-size: 1vw;
    color: #ffffff;
    display: block;
    transition: 0.3s;
}

#content {
    transition: margin-left .5s;
    padding: 2vw;
}

#top_banner {
    transition: margin-left .5s;
}

@media screen and (max-height: 450vh) {
    .side_nav {padding-top:  15vh}
    .side_nav a {font-size: 1.5vw}
}