/* cube — 전역 UI 조각: 맨 위로 버튼 등 (배지·페이지네이션은 30/31, 드롭다운은 40에 있다) */

.cube-top-btn {
	position: fixed;
	right: 20px;
	bottom: 20px;
	width: 44px;
	height: 44px;
	border-radius: 50%;
	background: var(--cube-bg);
	border: 1px solid var(--cube-border-strong);
	box-shadow: 0 2px 10px rgba(0, 0, 0, .12);
	display: flex;
	align-items: center;
	justify-content: center;
	color: var(--cube-text-muted);
	z-index: 30;
}
.cube-top-btn:hover {
	color: var(--cube-text);
}
.cube-top-btn svg {
	width: 18px;
	height: 18px;
}

@media (prefers-reduced-motion: no-preference) {
	html:has(.cube) {
		scroll-behavior: smooth;
	}
}