@charset "UTF-8";

/* ==========================================================================
   技術コラム詳細
   ========================================================================== */


/* ---------- アイキャッチ ---------- */

.column-single__hero {
	margin-top: 32px;
}

.column-single__hero-image {
	position: relative;
	aspect-ratio: 2 / 1;
	overflow: hidden;
	background-color: var(--color-bg-alt);
	border-radius: var(--radius);
}

.column-single__hero-image img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}


/* ---------- ヘッダー ---------- */

.column-single__header {
	margin-bottom: 48px;
	padding-bottom: 32px;
	border-bottom: 1px solid var(--color-border);
}

.column-single__meta {
	display: flex;
	align-items: center;
	gap: 16px;
	flex-wrap: wrap;
	margin-bottom: 16px;
}

.column-single__cat {
	display: inline-block;
	padding: 4px 16px;
	font-size: 0.8125rem;
	font-weight: 500;
	color: var(--color-text-on-dark);
	background-color: var(--color-primary);
	border-radius: var(--radius);
	text-decoration: none;
	transition: background-color var(--transition);
}

.column-single__cat:hover {
	background-color: var(--color-primary-dark);
}

.column-single__date {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-family: var(--font-number);
	font-size: 0.875rem;
	color: var(--color-text-light);
	letter-spacing: 0.05em;
}

.column-single__date-icon {
	color: var(--color-steel);
}

.column-single__title {
	font-size: 1.875rem;
	font-weight: 700;
	line-height: 1.5;
	color: var(--color-primary);
	margin-bottom: 20px;
}

.column-single__title-bar {
	width: 60px;
	height: 3px;
	background-color: var(--color-accent);
}


/* ---------- 本文 ---------- */

.column-single__body {
	font-size: 1rem;
	line-height: 1.9;
	color: var(--color-text);
	margin-bottom: 56px;
}

.column-single__body h2 {
	font-size: 1.5rem;
	font-weight: 700;
	color: var(--color-primary);
	margin: 48px 0 20px;
	padding: 12px 0 12px 16px;
	border-left: 4px solid var(--color-accent);
	background-color: var(--color-bg-alt);
	line-height: 1.5;
}

.column-single__body h3 {
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--color-primary);
	margin: 36px 0 16px;
	padding-bottom: 8px;
	border-bottom: 1px solid var(--color-border);
}

.column-single__body h4 {
	font-size: 1.0625rem;
	font-weight: 700;
	color: var(--color-primary);
	margin: 28px 0 12px;
}

.column-single__body p {
	margin-bottom: 1.5em;
}

.column-single__body a {
	color: var(--color-accent);
	text-decoration: underline;
	text-underline-offset: 3px;
}

.column-single__body a:hover {
	color: var(--color-accent-dark);
}

.column-single__body ul,
.column-single__body ol {
	margin: 0 0 1.5em 1.5em;
}

.column-single__body li {
	margin-bottom: 0.5em;
}

.column-single__body img {
	max-width: 100%;
	height: auto;
	margin: 24px 0;
	border-radius: var(--radius);
}

.column-single__body blockquote {
	margin: 24px 0;
	padding: 16px 20px;
	background-color: var(--color-bg-alt);
	border-left: 4px solid var(--color-steel);
	color: var(--color-text-light);
	font-size: 0.9375rem;
}

.column-single__body table {
	width: 100%;
	margin: 24px 0;
	border-collapse: collapse;
	font-size: 0.9375rem;
}

.column-single__body th,
.column-single__body td {
	padding: 12px 16px;
	border: 1px solid var(--color-border);
	text-align: left;
}

.column-single__body th {
	background-color: var(--color-bg-alt);
	font-weight: 600;
}


/* ---------- 共有 ---------- */

.column-single__share {
	display: flex;
	align-items: center;
	gap: 16px;
	padding: 24px 0;
	margin-bottom: 48px;
	border-top: 1px solid var(--color-border);
	border-bottom: 1px solid var(--color-border);
}

.column-single__share-label {
	font-family: var(--font-english);
	font-size: 0.8125rem;
	letter-spacing: 0.15em;
	color: var(--color-text-light);
}

.column-single__share-links {
	display: flex;
	gap: 8px;
}

.column-single__share-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 36px;
	height: 36px;
	border-radius: var(--radius);
	color: var(--color-text-on-dark);
	background-color: var(--color-primary);
	transition: background-color var(--transition), transform var(--transition);
}

.column-single__share-btn:hover {
	background-color: var(--color-primary-dark);
	transform: translateY(-2px);
}


/* ---------- 前後ナビ ---------- */

.column-single__nav {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 16px;
	margin-bottom: 64px;
}

.column-single__nav-item {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 16px 20px;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	color: inherit;
	text-decoration: none;
	transition: border-color var(--transition), background-color var(--transition);
}

.column-single__nav-item:hover {
	border-color: var(--color-primary);
	background-color: var(--color-primary-light);
}

.column-single__nav-item--empty {
	visibility: hidden;
}

.column-single__nav-item--next {
	justify-content: flex-end;
	text-align: right;
}

.column-single__nav-arrow {
	flex-shrink: 0;
	color: var(--color-primary);
}

.column-single__nav-label {
	display: block;
	font-family: var(--font-english);
	font-size: 0.6875rem;
	letter-spacing: 0.15em;
	color: var(--color-text-light);
	margin-bottom: 4px;
}

.column-single__nav-title {
	display: block;
	font-size: 0.875rem;
	font-weight: 500;
	color: var(--color-primary);
	line-height: 1.5;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}


/* ---------- 関連コラム ---------- */

.column-single__related {
	margin-bottom: 64px;
}

.column-single__related-heading {
	text-align: center;
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--color-primary);
	margin-bottom: 32px;
}

.column-single__related-en {
	display: block;
	font-family: var(--font-english);
	font-size: 0.75rem;
	letter-spacing: 0.2em;
	color: var(--color-accent);
	margin-bottom: 4px;
}

.column-single__related-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 24px;
}

.column-single__related-card {
	display: block;
	color: inherit;
	text-decoration: none;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	overflow: hidden;
	transition: transform var(--transition), box-shadow var(--transition);
}

.column-single__related-card:hover {
	transform: translateY(-4px);
	box-shadow: 0 10px 24px rgba(28, 53, 87, 0.08);
}

.column-single__related-image {
	aspect-ratio: 3 / 2;
	overflow: hidden;
	background-color: var(--color-bg-alt);
}

.column-single__related-image img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.column-single__related-body {
	padding: 16px;
}

.column-single__related-cat {
	display: inline-block;
	font-size: 0.75rem;
	color: var(--color-steel);
	margin-bottom: 8px;
}

.column-single__related-title {
	font-size: 0.9375rem;
	font-weight: 700;
	line-height: 1.6;
	color: var(--color-primary);
}


/* ---------- 一覧へ戻る ---------- */

.column-single__back {
	text-align: center;
}


/* ---------- SP ---------- */

@media (max-width: 768px) {
	.column-single__hero {
		margin-top: 20px;
	}

	.column-single__hero-image {
		aspect-ratio: 16 / 10;
	}

	.column-single__title {
		font-size: 1.375rem;
	}

	.column-single__body {
		font-size: 0.9375rem;
		line-height: 1.8;
	}

	.column-single__body h2 {
		font-size: 1.25rem;
	}

	.column-single__body h3 {
		font-size: 1.0625rem;
	}

	.column-single__nav {
		grid-template-columns: 1fr;
	}

	.column-single__related-grid {
		grid-template-columns: 1fr;
	}
}


/* ==========================================================================
   記事末尾コンポーネント（まとめ／監修者／参考文献）
   アミイダ（actpg）から移植、ソメヤのネイビー＋赤アクセントブランドに合わせて調整
   ========================================================================== */

.single-column .article-summary,
.single-column .article-supervisor,
.single-column .article-references {
	max-width: 100%;
	margin: clamp(40px, 5vw, 64px) auto 0;
	background: var(--color-bg);
	border: 2px solid var(--color-primary);
	border-radius: var(--radius);
}

.single-column .article-summary__head,
.single-column .article-supervisor__head,
.single-column .article-references__head {
	background: var(--color-primary);
	color: var(--color-text-on-dark);
	padding: clamp(14px, 2vw, 18px) clamp(20px, 3vw, 28px);
	display: flex;
	align-items: baseline;
	gap: 14px;
	flex-wrap: wrap;
}

.single-column .article-summary__eyebrow,
.single-column .article-supervisor__eyebrow,
.single-column .article-references__eyebrow {
	font-family: var(--font-english);
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.18em;
	color: var(--color-primary-light);
}

.single-column .article-summary__title,
.single-column .article-supervisor__title,
.single-column .article-references__title {
	font-family: var(--font-heading);
	font-size: clamp(1.15rem, 1.8vw, 1.375rem);
	font-weight: 700;
	margin: 0;
	color: var(--color-text-on-dark);
	letter-spacing: 0.02em;
	border: none;
	padding: 0;
	line-height: 1.3;
	/* .column-single__body h2 の薄グレー背景・赤左線が継承されるのを打ち消し、
	   __head のネイビー背景の上で白文字が読めるようにする */
	background: transparent;
}

/* .column-single__body li / a の汎用スタイルが継承されて
   gap ベースのレイアウトが崩れたり下線が常時付くのを打ち消す */
.single-column .article-summary__points li,
.single-column .article-supervisor__cert li,
.single-column .article-references__item {
	margin-bottom: 0;
}

.single-column .article-references__item a {
	text-decoration: none;
}

/* === まとめ === */
.single-column .article-summary {
	box-shadow: 6px 6px 0 0 var(--color-accent);
}

.single-column .article-summary__lead {
	padding: clamp(20px, 2.5vw, 28px) clamp(20px, 3vw, 28px) 0;
	font-size: clamp(1rem, 1.5vw, 1.0625rem);
	font-weight: 600;
	line-height: 1.85;
	color: var(--color-primary-dark);
	margin: 0;
}

.single-column .article-summary__points {
	list-style: none;
	margin: 0;
	padding: clamp(16px, 2vw, 20px) clamp(20px, 3vw, 28px) clamp(20px, 2.5vw, 28px);
	display: grid;
	gap: 10px;
}

.single-column .article-summary__points li {
	position: relative;
	padding-left: 28px;
	font-size: clamp(0.95rem, 1.4vw, 1rem);
	line-height: 1.75;
	color: var(--color-text);
}

.single-column .article-summary__points li::before {
	content: "▸";
	position: absolute;
	left: 0;
	top: 0;
	color: var(--color-accent);
	font-weight: 700;
	font-size: 1.1em;
}

/* === 監修者 === */
.single-column .article-supervisor {
	box-shadow: 4px 4px 0 0 var(--color-primary);
}

.single-column .article-supervisor__card {
	display: flex;
	gap: clamp(16px, 2.5vw, 24px);
	padding: clamp(20px, 2.5vw, 28px);
	align-items: flex-start;
}

.single-column .article-supervisor__avatar {
	flex: 0 0 auto;
	width: 64px;
	height: 64px;
	background: var(--color-accent);
	color: var(--color-text-on-dark);
	border: 2px solid var(--color-primary);
	display: flex;
	align-items: center;
	justify-content: center;
	font-family: var(--font-heading);
	font-size: 1.75rem;
	font-weight: 700;
	box-shadow: 3px 3px 0 0 var(--color-primary);
}

.single-column .article-supervisor__body {
	flex: 1 1 auto;
	min-width: 0;
}

.single-column .article-supervisor__name {
	font-size: clamp(1.05rem, 1.5vw, 1.125rem);
	font-weight: 700;
	color: var(--color-primary-dark);
	margin: 0 0 4px;
	display: flex;
	align-items: baseline;
	gap: 12px;
	flex-wrap: wrap;
}

.single-column .article-supervisor__role {
	font-size: 0.85rem;
	font-weight: 600;
	color: var(--color-accent);
	letter-spacing: 0.02em;
}

.single-column .article-supervisor__cert {
	list-style: none;
	margin: 8px 0 12px;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
}

.single-column .article-supervisor__cert li {
	padding: 3px 10px;
	background: var(--color-bg-alt);
	border: 1px solid var(--color-border);
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--color-text);
	line-height: 1.4;
}

.single-column .article-supervisor__bio {
	font-size: 0.9375rem;
	line-height: 1.8;
	color: var(--color-text);
	margin: 8px 0 0;
}

/* === 参考文献 === */
.single-column .article-references {
	box-shadow: 4px 4px 0 0 var(--color-primary);
}

.single-column .article-references__list {
	list-style: none;
	counter-reset: ref-counter;
	margin: 0;
	padding: clamp(16px, 2vw, 22px) clamp(20px, 3vw, 28px);
	display: grid;
	gap: 10px;
}

.single-column .article-references__item {
	counter-increment: ref-counter;
	position: relative;
	padding-left: 44px;
	font-size: 0.875rem;
	line-height: 1.7;
	color: var(--color-text);
	border-left: 3px solid var(--color-border);
	padding-top: 4px;
	padding-bottom: 4px;
	padding-right: 4px;
	margin-left: 8px;
}

.single-column .article-references__item::before {
	content: "[" counter(ref-counter) "]";
	position: absolute;
	left: 12px;
	top: 4px;
	font-family: var(--font-english);
	font-weight: 700;
	color: var(--color-accent);
	font-size: 0.8125rem;
}

.single-column .article-references__item a {
	color: var(--color-accent);
	word-break: break-all;
}

.single-column .article-references__item a:hover {
	text-decoration: underline;
}

/* モバイル: 監修者カードを縦積み */
@media (max-width: 600px) {
	.single-column .article-supervisor__card {
		flex-direction: column;
		align-items: flex-start;
	}
}