.sentivo-fab{position:fixed;right:12px;top:40%;z-index:9999}
.sentivo-fab a{display:block;background:#38aebf;color:#fff;text-decoration:none;padding:10px 8px;border-radius:10px;letter-spacing:1px;font-weight:600;writing-mode:vertical-rl;transform:rotate(180deg);box-shadow:0 2px 8px rgba(0,0,0,.15)}
.sentivo-fab a:hover{background:#2a92a1}
@media(max-width:640px){.sentivo-fab{top:auto;bottom:16px;right:12px}.sentivo-fab a{writing-mode:vertical-rl;transform:rotate(180deg);border-radius:16px;padding:6px 8px;font-size:0.8rem;letter-spacing:0.5px}}