.headroom{position:fixed;top:0;left:50%;-moz-transform:translate(-50%);-webkit-transform:translate(-50%);transform:translate(-50%);transition:all .2s ease-in-out;z-index:100}.headroom--unpinned{top:-100px;visibility:hidden}.headroom+*{margin-top:50px}.headroom--pinned{top:0}