#nav-ul {
    transition: 0.4s;
    line-height: 100px;
}

.show-menu-btn, .hide-menu-btn {
    transition: 0.4s;
    font-size: 4vh;
    cursor: pointer;
    display: none;
}

.show-menu-btn:hover, .hide-menu-btn:hover {
    color: #0be811;
}

.show-menu-btn {
    float: right;
}

.show-menu-btn i {
    line-height: 100px;
    padding-right: 35px;
}

#chk {
    position: absolute;
    visibility: hidden;
    display: inline;
}

@media screen and (max-width: 650px) {
    .show-menu-btn, .hide-menu-btn {
        display: block;
    }

    #nav-ul {
        position: fixed;
        width: 100%;
        height: 5vh;
        background: #1e272e;
        right: -110%;
        top: 0;
        text-align: center;
        padding: 80px 0;
        line-height: normal;
        transition: 0.7s;
        border-radius: 0 0 0 40px;
        box-shadow: 0 0 10px 4px #34495e;
    }
    
    .hide-menu-btn {
        position: absolute;
        top: 40px;
        right: 40px;
    }
    
    #chk:checked ~ #nav-ul {
        right: 0;
    }
}