/* =====================================================================
 * 記事更新履歴ボックス — フロント表示用スタイル
 * ===================================================================== */

.aul-box {
	--aul-accent: #2a4b8d;
	--aul-text: #333;
	--aul-muted: #6b7280;
	--aul-bg: #f6f8fb;
	--aul-line: #dfe5ee;

	margin: 0 0 2em;
	padding: 0;
	font-size: 0.9375em;
	line-height: 1.8;
	color: var(--aul-text);
	box-sizing: border-box;
}

.aul-box *,
.aul-box *::before,
.aul-box *::after {
	box-sizing: inherit;
}

/* ---------- 見出し ---------- */

.aul-box__summary,
.aul-box__heading {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 0.25em 0.85em;
	margin: 0;
	padding: 0.75em 1.1em;
	font-weight: 700;
	line-height: 1.6;
}

.aul-box__title {
	position: relative;
	color: var(--aul-accent);
	font-size: 1em;
	letter-spacing: 0.02em;
}

.aul-box__title::before {
	--aul-icon: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 12a9 9 0 1 0 3-6.7L3 8'/%3E%3Cpath d='M3 3v5h5'/%3E%3Cpath d='M12 7v5l3 2'/%3E%3C/svg%3E");
	content: "";
	display: inline-block;
	width: 1.05em;
	height: 1.05em;
	margin-right: 0.45em;
	vertical-align: -0.17em;
	background-color: currentColor;
	-webkit-mask-image: var(--aul-icon);
	mask-image: var(--aul-icon);
	-webkit-mask-repeat: no-repeat;
	mask-repeat: no-repeat;
	-webkit-mask-position: center;
	mask-position: center;
	-webkit-mask-size: contain;
	mask-size: contain;
}

.aul-box__latest {
	font-size: 0.85em;
	font-weight: 500;
	color: var(--aul-muted);
	letter-spacing: 0.01em;
}

/* ---------- 折りたたみ ---------- */

.aul-box__details {
	margin: 0;
}

.aul-box__summary {
	cursor: pointer;
	list-style: none;
	position: relative;
	padding-right: 2.6em;
	-webkit-tap-highlight-color: transparent;
}

.aul-box__summary::-webkit-details-marker {
	display: none;
}

.aul-box__summary::after {
	content: "";
	position: absolute;
	top: 50%;
	right: 1.1em;
	width: 0.5em;
	height: 0.5em;
	margin-top: -0.35em;
	border-right: 2px solid var(--aul-muted);
	border-bottom: 2px solid var(--aul-muted);
	transform: rotate(45deg);
	transform-origin: center;
	transition: transform 0.2s ease;
}

.aul-box__details[open] > .aul-box__summary::after {
	transform: rotate(-135deg);
	margin-top: -0.1em;
}

.aul-box__summary:hover .aul-box__title {
	text-decoration: underline;
	text-underline-offset: 0.2em;
}

.aul-box__summary:focus-visible {
	outline: 2px solid var(--aul-accent);
	outline-offset: 2px;
}

/* ---------- 履歴リスト ---------- */

.aul-box__body {
	padding: 0 1.1em 0.9em;
}

.aul-box__details[open] > .aul-box__body,
.aul-box__heading + .aul-box__body {
	border-top: 1px dashed var(--aul-line);
	padding-top: 0.85em;
}

.aul-box__list {
	margin: 0;
	padding: 0;
	list-style: none;
}

.aul-box__item {
	display: flex;
	flex-wrap: wrap;
	align-items: baseline;
	gap: 0.2em 0.9em;
	margin: 0;
	padding: 0.3em 0;
	list-style: none;
}

.aul-box__item + .aul-box__item {
	border-top: 1px solid var(--aul-line);
}

.aul-box__date {
	flex: 0 0 auto;
	min-width: 6.2em;
	font-size: 0.9em;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	color: var(--aul-accent);
	white-space: nowrap;
}

.aul-box__note {
	flex: 1 1 14em;
	min-width: 0;
}

.aul-box__note a {
	color: var(--aul-accent);
	text-decoration: underline;
	text-underline-offset: 0.15em;
}

/* =====================================================================
 * デザインバリエーション
 * ===================================================================== */

/* カード：背景 + 角丸 */
.aul-style-card {
	background: var(--aul-bg);
	border: 1px solid var(--aul-line);
	border-radius: 10px;
}

/* ボーダー：枠線のみ */
.aul-style-border {
	background: transparent;
	border: 1px solid var(--aul-line);
	border-radius: 4px;
}

.aul-style-border .aul-box__details[open] > .aul-box__body,
.aul-style-border .aul-box__item + .aul-box__item {
	border-color: var(--aul-line);
}

/* ミニマル：左ラインのみ */
.aul-style-minimal {
	background: transparent;
	border: 0;
	border-left: 3px solid var(--aul-accent);
	border-radius: 0;
}

.aul-style-minimal .aul-box__summary,
.aul-style-minimal .aul-box__heading {
	padding-left: 0.9em;
}

.aul-style-minimal .aul-box__body {
	padding-left: 0.9em;
}

/* ---------- スマートフォン ---------- */

@media screen and (max-width: 600px) {
	.aul-box {
		font-size: 0.9em;
	}

	.aul-box__summary,
	.aul-box__heading {
		padding: 0.7em 0.9em;
	}

	.aul-box__body {
		padding: 0 0.9em 0.8em;
	}

	.aul-box__item {
		gap: 0.1em 0.6em;
	}

	.aul-box__date {
		min-width: 5.6em;
	}
}

/* ---------- 印刷時は開いた状態で ---------- */

@media print {
	.aul-box__body {
		display: block !important;
	}

	.aul-box__summary::after {
		display: none;
	}
}