.scroll-to-top,.scroll-to-bottom{padding:2px;position:fixed;max-width:64px;max-height:64px;opacity:.7;cursor:pointer;z-index:9999}.sttb-middle-right .scroll-to-top{top:42%;right:10px}.sttb-middle-right .scroll-to-bottom{bottom:42%;right:10px}.sttb-middle-left .scroll-to-top{top:42%;right:inherit;left:10px}.sttb-middle-left .scroll-to-bottom{bottom:42%;right:inherit;left:10px}.sttb-bottom-right .scroll-to-top{bottom:20px;right:10px}.sttb-bottom-right .scroll-to-bottom{bottom:20px;right:46px}.sttb-bottom-left .scroll-to-top{right:inherit;bottom:20px;left:10px}.sttb-bottom-left .scroll-to-bottom{right:inherit;bottom:20px;left:46px}@media screen and (max-width:500px){.sttb-container{display:none}}