.fb-stack{z-index:900;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:32px;right:28px}.fb-btn{cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:46px;height:46px;text-decoration:none;display:flex}.fb-btn--top{color:#ffffffd1;opacity:0;pointer-events:none;background:linear-gradient(145deg,#1d2d42 0%,#0e1b2a 100%);transition:opacity .28s,transform .28s,box-shadow .22s;transform:translateY(10px);box-shadow:0 4px 16px #0e1b2a38}.fb-btn--top.fb-btn--visible{opacity:1;pointer-events:auto;transform:translateY(0)}.fb-btn--top:hover{color:#fffffffa;transform:translateY(-3px);box-shadow:0 8px 26px #0e1b2a52}.fb-btn--wa{color:#fff;background:#25d366;transition:transform .22s,box-shadow .22s;box-shadow:0 4px 16px #25d36647}.fb-btn--wa:hover{transform:translateY(-3px);box-shadow:0 8px 26px #25d36666}@media (max-width:768px){.fb-stack{bottom:24px;right:18px}.fb-btn{width:44px;height:44px}}