.toggle-button { top: 10px; left: 10px; position: absolute; box-shadow: 0 0 2px 2px whitesmoke; z-index: 100; } body { width: 100%; height: 100%; } .slideout-menu { position: fixed; left: 0; top: 0; bottom: 0; right: 0; z-index: 0; width: 256px; overflow-y: auto; -webkit-overflow-scrolling: touch; display: none; } .slideout-panel { position:relative; z-index: 1; } .slideout-open, .slideout-open body, .slideout-open .slideout-panel { overflow: hidden; } .slideout-open .slideout-menu { display: block; } #panel > header > button { box-shadow: 0 0 2px 2px whitesmoke; }