.z-to-top{background:var(--z-surface);border:1px solid var(--z-border);border-radius:var(--z-radius-pill);bottom:var(--z-space-6);box-shadow:var(--z-shadow-md,0 6px 20px rgba(0,0,0,.25));color:var(--z-text);cursor:pointer;display:grid;height:44px;place-items:center;position:fixed;right:var(--z-space-6);transition:transform .15s ease,background-color .15s ease;width:44px;z-index:40}.z-to-top:hover{background:var(--z-surface-raised,var(--z-surface));transform:translateY(-2px)}.z-to-top[hidden]{display:none}@media (prefers-reduced-motion:reduce){.z-to-top{transition:none}}