.road-back-to-top{--btt-face: var(--road-paper, #eeeae1);--btt-ink: var(--road-accent-ink, #7a4f12);--btt-edge: color-mix(in srgb, var(--road-text, #211e19) 20%, transparent);--btt-edge-hover: var(--road-accent, #d99a34);--btt-shadow: color-mix(in srgb, var(--road-text, #211e19) 10%, transparent);position:fixed;right:clamp(16px,3vw,32px);bottom:calc(clamp(16px,3vw,30px) + var(--compare-tray-lift, 0px));z-index:25;display:inline-flex;align-items:center;gap:6px;min-width:48px;min-height:44px;padding:9px 10px;border:0;border-top:1px solid var(--btt-edge);border-bottom:1px solid var(--btt-edge);border-radius:0;background:color-mix(in srgb,var(--btt-face) 94%,transparent);color:var(--btt-ink);box-shadow:0 5px 18px var(--btt-shadow);font:600 .72rem / 1 var(--font-ui);cursor:pointer;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(8px);transition:opacity var(--dur-pop) ease,visibility var(--dur-pop) ease,transform var(--dur-pop) ease,background-color var(--dur-pop) ease}.road-back-to-top.is-visible{opacity:1;visibility:visible;pointer-events:auto;transform:none}.road-back-to-top:hover,.road-back-to-top:focus-visible{background:var(--btt-face);border-color:var(--btt-edge-hover)}.road-back-to-top.is-visible:active{transform:scale(var(--press));transition-duration:var(--dur-press)}@media (prefers-reduced-motion: reduce){.road-back-to-top.is-visible:active{transform:none}}