img{height:auto;max-width:100%}.ft-section{max-height:100%}.ft-page{font-size:200%;line-height:200%;overflow:hidden;padding-left:1rem;padding-right:1rem}.stack,.stack-center{height:0;padding-top:56.25%;position:relative}.stacked,.stacked-center{position:absolute;top:0}.stacked-center{left:5%;right:5%}.stacked.ft-fragment.revealed,.stacked-center.ft-fragment.revealed{opacity:0 !important}.stack.ft-fragment.revealed.actual,.stacked-center.ft-fragment.revealed.actual{opacity:1 !important}.stacked-center{text-align:center}.sub-page{background-color:rgba(0,0,0,0.9);bottom:100%;color:rgba(255,255,255,0.8);left:0;opacity:0;overflow:auto;padding:2rem;position:absolute;right:0;top:0;transition:all 0.25s ease}.sub-page .sub-back{display:block;text-align:left}.sub-page.revealed{bottom:0;left:0;opacity:1 !important;right:0;top:0 !important}.popup-help{background-color:rgba(0,0,0,0.85);bottom:5%;left:5%;padding:5rem;position:absolute;right:5%;text-align:center;transition:all 0.5s ease;z-index:9000 !important}.popup-help ol{list-style:none;padding:0}.popup-help ol li{display:inline-block;margin:0}.popup-help img{height:auto}