/* art-walk/utamaro — 3段組コラム体裁 */

.utamaro-page {
	--utamaro-column-gap: 2rem;
	--utamaro-ink: #2f2721;
	--utamaro-heading: #1a1714;
	--utamaro-accent: #8b2e24;
	--utamaro-rule: rgba(176, 137, 104, 0.38);
}

.utamaro-page__shell {
	max-width: min(96vw, 72rem);
}

.utamaro-page__masthead {
	border-bottom: 1px solid var(--utamaro-rule);
	padding-bottom: 2rem;
}

.utamaro-page__lead {
	max-width: 42rem;
	line-height: 2;
	text-wrap: pretty;
}

.utamaro-page__container {
	margin-top: 2.5rem;
}

.utamaro-page__container--intro {
	margin-top: 2.5rem;
}

.utamaro-page__container--evolution {
	margin-top: 3.5rem;
	padding-top: 2.75rem;
	border-top: 1px solid var(--utamaro-rule);
}

.utamaro-page__crossnav {
	padding-top: 2rem;
	border-top: 1px solid var(--utamaro-rule);
}

/* 3グリッド — 左右 Ken Burns + 中央コラム */
.utamaro-kb-grid {
	display: grid;
	grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) minmax(0, 1fr);
	gap: var(--utamaro-column-gap);
	align-items: stretch;
}

.utamaro-kb-grid__body {
	min-width: 0;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	min-height: calc(100vh - 2.5rem);
	padding: 1.5rem 0;
}

.utamaro-kb-grid__prose {
	width: min(100%, 26rem);
	text-align: left;
}

.utamaro-kb-grid__panel {
	position: sticky;
	top: 1.25rem;
	height: calc(100vh - 2.5rem);
	min-height: 22rem;
	max-height: 52rem;
	overflow: hidden;
	border-radius: 2px;
	background: #1a1412;
	box-shadow:
		0 14px 36px rgba(43, 34, 28, 0.14),
		inset 0 0 0 1px rgba(176, 137, 104, 0.22);
	opacity: 0;
	transition: opacity 1.2s ease-out;
}

.utamaro-kb-grid__panel.is-panel-visible {
	opacity: 1;
}

.utamaro-kb-grid__panel .ken-burns-viewport {
	position: absolute;
	inset: 0;
}

.utamaro-kb-grid__panel .kenburns-col-vignette {
	position: absolute;
	inset: 0;
	pointer-events: none;
	z-index: 2;
}

.utamaro-kb-grid__panel--left .kenburns-col-vignette {
	background: linear-gradient(90deg, rgba(26, 20, 18, 0.42) 0%, transparent 58%);
}

.utamaro-kb-grid__panel--right .kenburns-col-vignette {
	background: linear-gradient(270deg, rgba(26, 20, 18, 0.42) 0%, transparent 58%);
}

.utamaro-page__columns--intro {
	font-family: 'Shippori Mincho', 'Noto Serif JP', 'Yu Mincho', serif;
	color: var(--utamaro-ink);
	font-size: clamp(0.92rem, 1.05vw, 1rem);
	line-height: 1.9;
	text-align: left;
	hyphens: auto;
}

.utamaro-page__columns--intro h2 {
	text-align: left;
	border-bottom: none;
	padding-bottom: 0;
	margin-bottom: 1.1rem;
	font-size: clamp(1.15rem, 1.8vw, 1.35rem);
	font-weight: 600;
	letter-spacing: 0.06em;
	color: var(--utamaro-heading);
	line-height: 1.5;
}

.utamaro-page__columns--intro h2:not(:first-child) {
	margin-top: 2.5rem;
	padding-top: 2rem;
	border-top: 1px solid var(--utamaro-rule);
}

.utamaro-page__columns--intro p {
	margin: 0 0 1rem;
	text-wrap: pretty;
}

.utamaro-page__columns--intro ul {
	margin: 0;
	padding-left: 1.15em;
	list-style: disc;
}

.utamaro-page__columns--intro li {
	margin-bottom: 0.85rem;
}

.utamaro-page__columns {
	font-family: 'Shippori Mincho', 'Noto Serif JP', 'Yu Mincho', serif;
	color: var(--utamaro-ink);
	font-size: clamp(0.92rem, 1.05vw, 1rem);
	line-height: 1.9;
	text-align: justify;
	hyphens: auto;
}

.utamaro-page__columns--triple {
	column-count: 3;
	column-gap: var(--utamaro-column-gap);
	column-rule: 1px solid var(--utamaro-rule);
}

.utamaro-page__columns h2 {
	column-span: all;
	margin: 0 0 1rem;
	padding-bottom: 0.65rem;
	border-bottom: 1px solid var(--utamaro-rule);
	font-size: clamp(1.15rem, 1.8vw, 1.35rem);
	font-weight: 600;
	letter-spacing: 0.06em;
	color: var(--utamaro-heading);
	line-height: 1.5;
	text-align: left;
}

.utamaro-page__columns h2:not(:first-child) {
	margin-top: 2.25rem;
}

.utamaro-page__columns h3 {
	break-after: avoid;
	margin: 1.35rem 0 0.55rem;
	font-size: clamp(0.98rem, 1.2vw, 1.08rem);
	font-weight: 600;
	color: var(--utamaro-heading);
	line-height: 1.55;
	text-align: left;
}

.utamaro-page__columns p {
	margin: 0 0 1rem;
	break-inside: avoid;
	orphans: 3;
	widows: 3;
}

.utamaro-page__columns ul {
	margin: 0 0 1rem;
	padding-left: 1.15em;
	break-inside: avoid;
}

.utamaro-page__columns li {
	margin-bottom: 0.55rem;
	break-inside: avoid;
}

.utamaro-page__columns strong {
	font-weight: 600;
	color: #3a2f28;
}

.utamaro-page__columns a {
	color: var(--utamaro-accent);
	text-decoration: underline;
	text-decoration-color: rgba(139, 46, 36, 0.35);
	text-underline-offset: 0.15em;
}

.utamaro-page__columns a:hover {
	color: #5c1710;
}

/* 特徴（1列）＋豆知識（2–3列） */
.utamaro-features-trivia-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: var(--utamaro-column-gap);
	margin-top: 2.75rem;
	padding-top: 2.25rem;
	border-top: 1px solid var(--utamaro-rule);
	font-family: 'Shippori Mincho', 'Noto Serif JP', 'Yu Mincho', serif;
	color: var(--utamaro-ink);
	font-size: clamp(0.92rem, 1.05vw, 1rem);
	line-height: 1.9;
}

.utamaro-features-trivia-grid__features {
	grid-column: 1;
	min-width: 0;
}

.utamaro-features-trivia-grid__trivia {
	grid-column: 2 / 4;
	min-width: 0;
	padding-left: 0.15rem;
	border-left: 1px solid var(--utamaro-rule);
}

.utamaro-features-trivia-grid h2 {
	margin: 0 0 1rem;
	padding-bottom: 0.65rem;
	border-bottom: 1px solid var(--utamaro-rule);
	font-size: clamp(1.15rem, 1.8vw, 1.35rem);
	font-weight: 600;
	letter-spacing: 0.06em;
	color: var(--utamaro-heading);
	line-height: 1.5;
	text-align: left;
}

.utamaro-features-trivia-grid ul {
	margin: 0;
	padding-left: 1.15em;
	list-style: disc;
}

.utamaro-features-trivia-grid li {
	margin-bottom: 0.75rem;
	text-align: left;
	text-wrap: pretty;
}

.utamaro-features-trivia-grid li:last-child {
	margin-bottom: 0;
}

.utamaro-features-trivia-grid strong {
	font-weight: 600;
	color: #3a2f28;
}

.utamaro-features-trivia-grid__trivia ul {
	column-count: 2;
	column-gap: var(--utamaro-column-gap);
}

.utamaro-features-trivia-grid__trivia li {
	break-inside: avoid;
}

@media only screen and (max-width: 1100px) {
	.utamaro-kb-grid {
		grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.3fr);
	}

	.utamaro-kb-grid__panel--right {
		display: none;
	}

	.utamaro-page__columns--triple {
		column-count: 2;
	}

	.utamaro-features-trivia-grid {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}

	.utamaro-features-trivia-grid__trivia {
		grid-column: 1 / -1;
		border-left: none;
		padding-left: 0;
		padding-top: 1.5rem;
		border-top: 1px solid var(--utamaro-rule);
	}

	.utamaro-features-trivia-grid__trivia ul {
		column-count: 2;
	}
}

@media only screen and (max-width: 768px) {
	.utamaro-kb-grid {
		grid-template-columns: 1fr;
	}

	.utamaro-kb-grid__panel {
		position: relative;
		top: auto;
		height: 42vh;
		min-height: 16rem;
		max-height: 24rem;
		order: -1;
	}

	.utamaro-kb-grid__panel--right {
		display: none;
	}

	.utamaro-kb-grid__body {
		min-height: 0;
		max-height: none;
		padding: 1.25rem 0 0;
	}

	.utamaro-kb-grid__prose {
		width: 100%;
	}

	.utamaro-page__columns--triple {
		column-count: 1;
		column-rule: none;
		text-align: left;
	}

	.utamaro-page__columns--intro h2:not(:first-child) {
		margin-top: 2rem;
		padding-top: 1.5rem;
	}

	.utamaro-features-trivia-grid {
		grid-template-columns: 1fr;
	}

	.utamaro-features-trivia-grid__trivia {
		grid-column: auto;
		padding-top: 1.5rem;
		border-top: 1px solid var(--utamaro-rule);
	}

	.utamaro-features-trivia-grid__trivia ul {
		column-count: 1;
	}
}

@media (prefers-reduced-motion: reduce) {
	.utamaro-kb-grid__panel {
		opacity: 1;
		transition: none;
	}
}