button.scrollTopBtn{position:fixed;right:24px;bottom:calc(24px + env(safe-area-inset-bottom, 0px));left:auto;top:auto;width:48px;height:48px;min-width:48px;padding:0;margin:0;display:flex;align-items:center;justify-content:center;border:1px solid #d5eae7;border-radius:50%;background:#fff;color:var(--teal,#0d6c66);cursor:pointer;z-index:99999;box-shadow:0 4px 14px rgba(0,0,0,.2);-webkit-tap-highlight-color:transparent;touch-action:manipulation;-webkit-appearance:none;-moz-appearance:none;appearance:none;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(16px);transition:opacity .3s ease,transform .25s ease,background-color .25s ease,color .25s ease,box-shadow .25s ease,visibility .3s}button.scrollTopBtn.isVisible{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}.scrollTopIcon{display:block;transition:transform .25s ease}@media (hover:hover){button.scrollTopBtn.isVisible:hover{background:var(--teal,#0d6c66);color:#fff;border-color:var(--teal,#0d6c66);transform:translateY(-4px);box-shadow:0 8px 20px rgba(13,108,102,.45)}button.scrollTopBtn.isVisible:hover .scrollTopIcon{transform:translateY(-2px)}}button.scrollTopBtn.isVisible:active{transform:translateY(-1px) scale(.95)}button.scrollTopBtn:focus-visible{outline:3px solid rgba(13,108,102,.4);outline-offset:3px}@media (max-width:640px){button.scrollTopBtn{right:16px;bottom:calc(16px + env(safe-area-inset-bottom, 0px));width:44px;height:44px;min-width:44px}}@media (prefers-reduced-motion:reduce){.scrollTopIcon,button.scrollTopBtn{transition:none}}