@media only screen and (max-width: 991px) {
    .menu {
        margin-top: 50px;
        list-style: none;
        width: 60%;
        background: rgba(0, 0, 0, 0.8);
        box-shadow: 2px 0px 8px rgba(0, 0, 0, 0.8);
        position: fixed;
        height: 100%;
        left: -60%;
        transition: 1s;
    }

    .sub-menu {
        display: block !important;
    }

    .nav .open {
        left: 0%;
    }

    .menu > li {
        line-height: 50px;
        display: list-item;
        margin: 0 10px;
    }

    .nav ul {
        list-style: none;
        padding-left: 15px;
    }

    .brand {
        left: 15px;
        line-height: 50px;
        height: 50px;
        text-align: center;
        position: relative;
    }

    .nav {
        float: left;
    }

}

@media only screen and (min-width: 992px) {
    .nav > div {
        position: absolute;
    }

    .brand {
        line-height: 50px;
        float: left;
        margin: auto 20px;
    }


    .toggle {
        display: none;
    }

    .menu {
        list-style: none;
        float: left;
        display: flex;
        align-items: center;
        justify-content: flex-end;
        width: 100%;
    }

    .menu-item {
        display: inline-block;
        width: auto;
        margin: auto 20px;
    }

    .sub-menu {
        padding-top: 10px;
        display: none;
        list-style: none;
        position: absolute;
        padding-left: 0;
        background-color: black;
    }

    .sub-menu .sub-menu-item {
        margin: 10px 20px;
    }

    .nav:after {
        content: "";
        display: block;
    }
}

.nav {
    background-color: black;
    position: fixed;
    height: 50px;
    z-index: 100;
    width: 100%;
    top: 0;
    color: white;    
    transition-delay: 1s;
    transition-timing-function: ease;
    transition-duration:1s;
}

.nav a {
    color: white;
    text-decoration: none;
}

.toggle {
    right: 15px;
    float: right;
    padding: 6px 5px 0px 5px;
    position: absolute;
    border: 2px solid #fff;
    border-radius: 5px;
    height: 34px;
    margin: auto 0px;
}

.toggle span {
    height: 2px;
    width: 20px;
    display: block;
    background: #fff;
    border-radius: 10px;
}

.toggle span + span {
    margin-top: 6px;
}