.back-to-top{z-index:1400;background:var(--btt-bg,var(--gold,#b8935a));width:44px;height:44px;color:var(--white,#fff);cursor:pointer;opacity:0;visibility:hidden;border:none;border-radius:50%;justify-content:center;align-items:center;transition:opacity .25s,visibility .25s,transform .25s,background .2s;display:flex;position:fixed;bottom:20px;right:20px;transform:translateY(10px)scale(.92);box-shadow:0 4px 16px #00000038}.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)scale(1)}.back-to-top:hover{background:var(--btt-bg-hover,var(--gold-lt,#d4b07a))}.back-to-top:focus-visible{outline:2px solid var(--btt-bg-hover,var(--gold-lt,#d4b07a));outline-offset:2px}body:has(.whatsapp-fab) .back-to-top{bottom:88px}@media (prefers-reduced-motion:reduce){.back-to-top{transition:opacity .15s,visibility .15s;transform:none}.back-to-top.visible{transform:none}}