/* 歌麿廻転灯籠 — Zeitgeist イントロ埋め込み */
.intro-with-ring {
	display: grid;
	grid-template-columns: 1fr min(440px, 42%);
	gap: 2rem;
	align-items: center;
	max-width: 1200px;
	margin: 0 auto;
}

.intro-ring {
	min-width: 0;
}

.utamaro-ring-wrap {
	--ring-accent: rgba(30, 60, 150, 0.85);
	--ring-border: rgba(30, 60, 150, 0.18);
	--ring-muted: rgba(0, 0, 0, 0.55);
}

.utamaro-ring-meta {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	margin-bottom: 0.65rem;
	font-size: 0.75rem;
	color: var(--ring-muted);
}

.utamaro-ring-stage {
	position: relative;
	width: 100%;
	height: 340px;
	perspective: 1100px;
	overflow: hidden;
	border-radius: 6px;
	cursor: grab;
	background: rgba(255, 255, 255, 0.55);
	border: 1px solid var(--ring-border);
	box-shadow: 0 8px 28px rgba(30, 60, 150, 0.12);
	backdrop-filter: blur(6px);
	-webkit-backdrop-filter: blur(6px);
}

.utamaro-ring-stage:active {
	cursor: grabbing;
}

.utamaro-ring-glow {
	position: absolute;
	inset: 0;
	pointer-events: none;
	background: radial-gradient(ellipse 80% 60% at 50% 45%, rgba(255, 200, 120, 0.18), transparent 70%);
	mix-blend-mode: multiply;
	opacity: 0.85;
	transition: opacity 0.4s ease;
}

.utamaro-ring-paper {
	position: absolute;
	inset: 0;
	pointer-events: none;
	background: repeating-linear-gradient(
		0deg,
		transparent,
		transparent 3px,
		rgba(255, 240, 220, 0.04) 3px,
		rgba(255, 240, 220, 0.04) 4px
	);
	opacity: 0.7;
}

.utamaro-ring {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 120px;
	height: 175px;
	margin: -87.5px 0 0 -60px;
	transform-style: preserve-3d;
	will-change: transform;
}

.utamaro-ring-panel {
	position: absolute;
	width: 120px;
	height: 175px;
	border-radius: 5px;
	overflow: hidden;
	cursor: pointer;
	border: 1px solid rgba(30, 60, 150, 0.2);
	box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
	backface-visibility: hidden;
	transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.utamaro-ring-panel::before {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(180deg, rgba(255, 230, 200, 0.1) 0%, transparent 40%, rgba(0, 0, 0, 0.3) 100%);
	pointer-events: none;
	z-index: 1;
}

.utamaro-ring-panel::after {
	content: "";
	position: absolute;
	inset: 0;
	background: rgba(255, 235, 210, 0.1);
	pointer-events: none;
	z-index: 2;
}

.utamaro-ring-panel img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	object-position: top center;
	display: block;
	filter: saturate(0.92) brightness(0.95);
}

.utamaro-ring-panel-label {
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	padding: 7px 8px 9px;
	font-size: 0.65rem;
	font-weight: 500;
	line-height: 1.35;
	color: #fff;
	background: linear-gradient(transparent, rgba(20, 12, 8, 0.82));
	z-index: 3;
	text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

.utamaro-ring-panel.is-active {
	box-shadow: 0 0 22px rgba(30, 60, 150, 0.35), 0 10px 32px rgba(0, 0, 0, 0.35);
	border-color: rgba(30, 60, 150, 0.45);
}

.utamaro-ring-shadow {
	position: absolute;
	bottom: 12px;
	left: 50%;
	transform: translateX(-50%);
	width: 55%;
	height: 14px;
	background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.28), transparent 70%);
	pointer-events: none;
}

.utamaro-ring-loading {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 0.82rem;
	color: var(--ring-muted);
}

.utamaro-ring-caption {
	margin-top: 0.85rem;
	padding-top: 0.75rem;
	border-top: 1px solid var(--ring-border);
	min-height: 64px;
}

.utamaro-ring-caption .series {
	font-size: 0.72rem;
	color: var(--ring-accent);
	margin: 0 0 0.2rem;
}

.utamaro-ring-caption h3 {
	font-size: 0.95rem;
	font-weight: 600;
	margin: 0 0 0.25rem;
	color: rgba(0, 0, 0, 0.88);
}

.utamaro-ring-caption p {
	font-size: 0.78rem;
	color: var(--ring-muted);
	line-height: 1.5;
	margin: 0;
}

.utamaro-ring-caption a {
	display: inline-block;
	margin-top: 0.4rem;
	font-size: 0.72rem;
	color: var(--ring-accent);
	text-decoration: none;
}

.utamaro-ring-caption a:hover {
	text-decoration: underline;
}

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

@media only screen and (max-width: 900px) {
	.intro-with-ring {
		grid-template-columns: 1fr;
		gap: 1.5rem;
	}

	.utamaro-ring-stage {
		height: 300px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.utamaro-ring-glow {
		transition: none;
	}
}