.scrollToTop{width:44px;height:44px;padding:8px;position:fixed;bottom:calc(16px + env(safe-area-inset-bottom,0px));left:max(16px,env(safe-area-inset-left,0px));opacity:0;z-index:999;transform:translate3d(0,12px,0);transition:opacity var(--motion-duration-fast, .16s) ease,transform var(--motion-duration-base, .28s) var(--motion-ease, cubic-bezier(.22, 1, .36, 1));pointer-events:all;background:linear-gradient(135deg,#6366f1,#4f46e5);border-radius:50%;box-shadow:0 4px 12px rgba(99,102,241,.4)}.scrollToTop:focus-visible{outline:2px solid #c7d2fe;outline-offset:3px}.scroll-to-top-btn-icon{fill:none;stroke:#fff;stroke-width:2px;fill-rule:evenodd;stroke-linecap:round}.showScrollTop{opacity:1;pointer-events:all;transform:translate3d(0,0,0)}@media (prefers-reduced-motion:reduce){.scrollToTop{transition:none;transform:none}}