Navbar Hover Transition

HTML

<ul id="navbar">
    <li class="active"><a href="#">Home</a></li>
    <li><a href="#">About</a></li>
    <li><a href="#">Portfolio</a></li>
    <li><a href="#">Contact</a></li>
</ul>

<link href='http://fonts.googleapis.com/css?family=Oswald:400,300' rel='stylesheet' type='text/css'>

CSS

html, body {
    height: 100%;
}
body {
    margin: 0;
    background-color: lightsteelblue;
    background-image: url('http://hdw.datawallpaper.com/architecture/vintage-new-york-city-299988.jpg');
    background-position: center;
    background-size: cover;
    background-blend-mode: overlay;
    -moz-background-blend-mode: overlay;
}

#navbar {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    height: 60px;
    margin: 0;
    padding: 0;
    list-style: none;
    background: #222;
    font-family: 'Oswald', sans-serif;
    font-size: 18px;
    font-weight: 300;
}

#navbar li {
    position: relative;
    float: left;
    line-height: 60px;
    background: inherit;
    text-align: center;
    transition: all .2s;
}

#navbar li a {
    position: relative;
    display: block;
    padding: 0 20px;
    line-height: inherit;

    text-decoration: none;
}

#navbar li:before {
    content: '';
    display: block;
    position: absolute;
    left: 50%;
    margin-left: -30px;
    width: 60px;
    height: 60px;
    background: #222;
    border-radius: 50%;
    transform: rotate(45deg);
    transition: all 0, background .2s;
}
#navbar li:hover:before {
    margin-top: 1px;
    border-radius: 50% 50% 0 50%;
    transition: all .1s, background .2s, margin-top .2s cubic-bezier(.5,30,.2,0);
}
#navbar li:hover,
#navbar li:hover:before {
    background: #3a3a3a;
}
#navbar li.active,
#navbar li.active:before {
    background: steelblue;
}

JavaScript

$('#navbar li').click(function() {
    $(this).addClass('active').siblings('li').removeClass('active');
});