Full Page Search Box

HTML:
<ul class="nav navbar-nav navbar-right">
 	<li><a href="#search">Search</a></li>
</ul>

CSS:
#search {
    position: fixed;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);

    -webkit-transition: all 0.5s ease-in-out;
	-moz-transition: all 0.5s ease-in-out;
	-o-transition: all 0.5s ease-in-out;
	-ms-transition: all 0.5s ease-in-out;
	transition: all 0.5s ease-in-out;

    -webkit-transform: translate(0px, -100%) scale(0, 0);
	-moz-transform: translate(0px, -100%) scale(0, 0);
	-o-transform: translate(0px, -100%) scale(0, 0);
	-ms-transform: translate(0px, -100%) scale(0, 0);
	transform: translate(0px, -100%) scale(0, 0);

    opacity: 0;
}

#search.open {
    -webkit-transform: translate(0px, 0px) scale(1, 1);
    -moz-transform: translate(0px, 0px) scale(1, 1);
	-o-transform: translate(0px, 0px) scale(1, 1);
	-ms-transform: translate(0px, 0px) scale(1, 1);
	transform: translate(0px, 0px) scale(1, 1);
    opacity: 1;
}

#search input[type="search"] {
    position: absolute;
    top: 50%;
    width: 100%;
    color: rgb(255, 255, 255);
    background: rgba(0, 0, 0, 0);
    font-size: 60px;
    font-weight: 300;
    text-align: center;
    border: 0px;
    margin: 0px auto;
    margin-top: -51px;
    padding-left: 30px;
    padding-right: 30px;
    outline: none;
}
#search .btn {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: 61px;
    margin-left: -45px;
  	background-color: limegreen;
  border: black;

}
#search .close {
    position: fixed;
    top: 15px;
    right: 15px;
    color: #fff;
	background-color: limegreen;
	border-color: green;
	opacity: 1;
	padding: 10px 17px;
	font-size: 27px;
}

JS:
$(function () {
    $('a[href="#search"]').on('click', function(event) {
        event.preventDefault();
        $('#search').addClass('open');
        $('#search > form > input[type="search"]').focus();
    });

    $('#search, #search button.close').on('click keyup', function(event) {
        if (event.target == this || event.target.className == 'close' || event.keyCode == 27) {
            $(this).removeClass('open');
        }
    });

    $('form').submit(function(event) {
        event.preventDefault();
        return false;
    })
});