#menu{position:fixed;top:0;left:0;right:0;transform:translate3d(0,-100%,0);will-change:transform;backface-visibility:hidden;transition:transform 0.35s cubic-bezier(0.25,0.8,0.25,1);z-index:1000}body.menu-visible #menu{transform:translate3d(0,0,0)}#menu-placeholder{display:none}body.menu-fixed.menu-visible #menu-placeholder{display:block}