.bkstt-wrap{position:fixed;z-index:9990;pointer-events:none;opacity:0;transition:opacity 0.3s ease,transform 0.3s ease}.bkstt-wrap.bkstt-visible{opacity:1!important;transform:translateY(0)!important;pointer-events:auto}.bkstt-btn{cursor:pointer;font-family:inherit;position:relative;z-index:1;transition:transform 0.2s ease,box-shadow 0.2s ease}.bkstt-btn:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgb(0 0 0 / .25)!important}.bkstt-btn:active{transform:translateY(0)}@keyframes bksttPulse{0%{transform:scale(1);opacity:.6}70%{transform:scale(1.6);opacity:0}100%{transform:scale(1.6);opacity:0}}.bkstt-pulse{position:absolute;inset:-6px;animation:bksttPulse 1.8s ease-out infinite}