.back-to-top{position:fixed;right:max(18px,calc((100vw - 1120px)/2));bottom:calc(20px + env(safe-area-inset-bottom));z-index:6;display:flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:12px 18px;border:1px solid #ffffffed;border-radius:100px;background:#ffffffeb;color:var(--ink);box-shadow:0 8px 28px #173c3526,inset 0 1px 0 #fff;backdrop-filter:blur(20px) saturate(1.3);-webkit-backdrop-filter:blur(20px) saturate(1.3);font-size:15px;font-weight:600;line-height:1.3;touch-action:manipulation}
.back-to-top svg{width:20px;height:20px;flex:none}.back-to-top:focus-visible{outline:3px solid #258b6b;outline-offset:4px}body:has(dialog[open])>.back-to-top{visibility:hidden}.guest-page,.legal-page{padding-bottom:calc(84px + env(safe-area-inset-bottom))}
@media(hover:hover){.back-to-top:hover{background:var(--mint);transform:translateY(-2px)}}
@media(prefers-reduced-motion:reduce){.back-to-top{transition:none}.back-to-top:hover{transform:none}}
@media(prefers-reduced-transparency:reduce){.back-to-top{background:var(--paper);backdrop-filter:none;-webkit-backdrop-filter:none}}
@media print{.back-to-top{display:none!important}.guest-page,.legal-page{padding-bottom:0}}