.back-to-top{position:fixed;right:24px;bottom:max(24px,env(safe-area-inset-bottom));z-index:60;display:flex;align-items:center;gap:9px;min-height:48px;padding:12px 18px;background:var(--a-card);color:var(--a-ink);border:1px solid var(--a-line);border-radius:999px;box-shadow:0 6px 25px #0002;font:600 12px var(--r-body);cursor:pointer}.back-to-top svg{width:20px;height:20px}.back-to-top:hover{border-color:var(--a-accent)}.back-to-top:focus-visible{outline:3px solid var(--a-accent);outline-offset:4px}@media(max-width:600px){.back-to-top{right:14px;bottom:max(14px,env(safe-area-inset-bottom));padding:12px;gap:6px;font-size:11px}}