*,
*:before,
*:after {
	margin:0;
	padding: 0;
	box-sizing: border-box;
	-moz-box-sizing: border-box;
	-webkit-box-sizing: border-box;
}

.right {float: right;}
.left {float: left;}
.clear {clear: both;}
.hidden {display: none;}
.invisible {visibility: hidden;}
.center {text-align: center;}
.relative {position: relative;}

a img {border: 0;}

nav li {list-style-type: none; display: block; float: left;}
nav li a {text-decoration: none;}

a.invert {text-decoration: none;}
a.invert:hover {text-decoration: underline;}