@media (max-width: 55em) {
    #nav-icon1, #nav-icon2, #nav-icon3, #nav-icon4 {
        width: 30px;
        height: 20px;
        position: relative;
        float: right;
        margin: 1rem 1rem 0 0;
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        -o-transform: rotate(0deg);
        transform: rotate(0deg);
        -webkit-transition: .5s ease-in-out;
        -moz-transition: .5s ease-in-out;
        -o-transition: .5s ease-in-out;
        transition: .5s ease-in-out;
        cursor: pointer;
    }

    #nav-icon1 span, #nav-icon3 span, #nav-icon4 span {
        display: block;
        position: absolute;
        height: 4px;
        width: 100%;
        background: #333;
        border-radius: 2px;
        opacity: 1;
        left: 0;
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        -o-transform: rotate(0deg);
        transform: rotate(0deg);
        -webkit-transition: .25s ease-in-out;
        -moz-transition: .25s ease-in-out;
        -o-transition: .25s ease-in-out;
        transition: .25s ease-in-out;
    }

    #nav-icon1 span:nth-child(1) {
        top: 0px;
    }

    #nav-icon1 span:nth-child(2) {
        top: 8px;
    }

    #nav-icon1 span:nth-child(3) {
        top: 16px;
    }

    #nav-icon1.open span:nth-child(1) {
        top: 8px;
        -webkit-transform: rotate(135deg);
        -moz-transform: rotate(135deg);
        -o-transform: rotate(135deg);
        transform: rotate(135deg);
    }

    #nav-icon1.open span:nth-child(2) {
        opacity: 0;
        right: 200px;
    }

    #nav-icon1.open span:nth-child(3) {
        top: 8px;
        -webkit-transform: rotate(-135deg);
        -moz-transform: rotate(-135deg);
        -o-transform: rotate(-135deg);
        transform: rotate(-135deg);
    }

    #menu.open {
        display: block;
        transform: translateX(0);
        transition: 0.5s ease-in-out;
    }

    #menu {
        /*display: none;*/
        width: 213px;
        position: fixed;
        z-index: 1000;
        background-color: black;
        transform: translateX(-100%);
        transition: 0.5s ease-in-out;
        overflow-y: hidden;
        top: 0;
        padding-top: 44px;
        height: 100%;
    }
    .menu-entries {
        overflow: auto;
        height: 100%;
    }
}