centering navigation with flexbox display

Centering navigation items with floating & positioning requires to much calculations. Flexbox display offers a way to solve this task quickly.

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<nav class="container">
    <div class="row visible-xs text-center">
        <div class="col-xs-12">	<a href="#"><img src="http://icicnr.indiancattle.com/images/sample_logo.png"  width="200" alt="BLUE|BERY"/></a>

        </div>
    </div>
    <div class="row">
        <div class="col-sm-12">
            <ul class="text-center">
                <li><a href="#">Who We Are</a>
                </li>
                <li><a href="#">Our Food</a>
                </li>
                <li><a href="#">Our Food</a>
                </li>
                <li class="hidden-xs"><a href="#"><img src="http://icicnr.indiancattle.com/images/sample_logo.png" width="200" alt="BLUE|BERY"/></a>
                </li>
                <li><a href="#">Book a Table</a>
                </li>
                <li><a href="#">Promotions</a>
                </li>
                <li><a href="#">Our Food</a>
                </li>
                <li><a href="#">Our Food</a>
                </li>
            </ul>
        </div>
    </div>
</nav>
<div class="container">
    <div class="row">
            <img src="image.jpg" width="100%" height="300" alt="image-goes-here" />
    </div>
</div>

CSS

body {
    background-color: #333333;
    font-size: 1.8rem;
}
nav {
    background-color: #000000;
    padding: 15px 0 10px;
}
nav ul {
    display: flex;
    list-style-type: none;
    padding-left: 0;
}
nav ul > li {
    margin: auto;
    padding: 10px;
}
nav ul > li > a:link, :visited, :hover, :active {
    color: #ffffff;
    text-decoration:none;
}
@media all and (max-width:767px) {
    nav a > img {
        margin: 20px auto;
    }
    nav ul {
        flex-direction: column;
    }
}
@media all and (min-width:1200px) {
    nav {
        margin-top: 40px;
        padding: 30px 0;
    }
}