.dd-back-top{position:fixed;right:20px;bottom:92px;z-index:145;width:44px;height:44px;border-radius:50%;background:var(--dd-ink,#0A0A0A);color:#fff;border:1px solid rgba(255,255,255,0.08);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 20px rgba(10,10,10,0.18);opacity:0;visibility:hidden;transform:translateY(12px) scale(0.9);transition:opacity 220ms ease,transform 220ms cubic-bezier(.2,.7,.2,1),visibility 0ms linear 220ms,background 160ms ease;font-family:inherit}.dd-back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0) scale(1);transition:opacity 220ms ease,transform 220ms cubic-bezier(.2,.7,.2,1),background 160ms ease}.dd-back-top:hover{background:var(--dd-accent,#7A1F2B);transform:translateY(-3px) scale(1.05)}.dd-back-top:focus-visible{outline:2px solid var(--dd-gold,#E6C06C);outline-offset:2px}.dd-back-top svg{transition:transform 180ms ease}.dd-back-top:hover svg{transform:translateY(-2px)}@media (max-width:900px){.dd-back-top{right:16px;bottom:calc(142px+env(safe-area-inset-bottom,0px));width:40px;height:40px}.dd-back-top svg{width:16px;height:16px}}@media (prefers-reduced-motion:reduce){.dd-back-top{transition:opacity 220ms ease,visibility 0ms linear 220ms}.dd-back-top.is-visible{transition:opacity 220ms ease}.dd-back-top:hover{transform:none}.dd-back-top:hover svg{transform:none}}