:root {
	--article-ink: #1c2327;
	--article-accent: #BD271E;
	--article-accent-soft: #e8836f;
	--article-paper: #faf9f7;
	--article-line: #e3e1dc;
	--article-muted: #6b6b6b;
}

.sec-article {
	background-color: #fff;
}

.sec-article .inner {
	max-width: 1100px;
	margin: 0 auto;
	padding: 0 20px;
}

/* ==========================
   記事ヘッダー（日付・タグ）
========================== */
.single-article__header {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	/* margin-bottom: 2rem; */
	padding-bottom: 1.2rem;
	/* border-bottom: 1px solid var(--article-line); */
}

.single-article__header-dates {
	display: flex;
	align-items: center;
	gap: 12px;
	margin-left: auto;
}

.single-article__date,
.single-article__modified {
	font-size: 1.3rem;
	color: var(--article-muted);
	letter-spacing: 0.02em;
}

.single-article__modified {
	position: relative;
	padding-left: 14px;
}

.single-article__modified::before {
	content: "";
	position: absolute;
	left: 0;
	top: 50%;
	transform: translateY(-50%);
	width: 4px;
	height: 4px;
	background: var(--article-accent);
	border-radius: 50%;
}

.single-article__tags {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	list-style: none;
	padding: 0;
	margin: 0;
}

.single-article__tags a {
	display: inline-block;
	font-size: 1.2rem;
	color: #fff;
	background-color: var(--article-accent);
	padding: 4px 14px;
	border-radius: 999px;
	text-decoration: none;
	transition: background-color 0.2s;
}

.single-article__tags a:hover {
	background-color: var(--article-accent);
}

/* ==========================
   アイキャッチ
========================== */
.single-article__thumbnail {
	margin-bottom: 2.5rem;
}

.single-article__thumbnail img {
	width: 100%;
	height: auto;
	border-radius: 4px;
}

/* ==========================
   タイトル
========================== */
.single-article__title {
	position: relative;
	font-size: 2.8rem;
	font-weight: 700;
	line-height: 1.5;
	color: var(--article-ink);
	/* margin-bottom: 2.5rem; */
	padding-bottom: 1.6rem;
}

/* .single-article__title::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: 0;
	width: 60px;
	height: 5px;
	background: linear-gradient(90deg, var(--article-accent), var(--article-accent-soft));
	border-radius: 3px;
} */

/* ==========================
   目次
========================== */
.single-article__toc {
	background-color: #f3f3f4;
	background-image: repeating-linear-gradient(135deg,
			rgba(0, 0, 0, 0.015) 0px,
			rgba(0, 0, 0, 0.015) 1px,
			transparent 1px,
			transparent 6px);
	border-top: 1px solid #d8d8da;
	border-bottom: 1px solid #d8d8da;
	max-width: 85%;
	margin: 0 auto 3rem;
	padding: 1.4rem 3rem 3.4rem 3rem;
}

.single-article__toc-label {
	text-align: center;
	font-size: 1.7rem;
	font-weight: 700;
	color: var(--article-ink);
	margin: 0 0 1.6rem;
}

.single-article__toc-list {
	list-style: none;
	padding: 0;
	margin: 0;
}

/* .single-article__toc-list .toc-h2 {
	margin-bottom: 0.55rem;
} */

.single-article__toc-list .toc-h3 {
	/* margin-bottom: 0.4rem; */
	padding-left: 2.2em;
}

.single-article__toc-list a {
	display: inline-block;
	font-size: 1.4rem;
	color: var(--article-ink);
	text-decoration: none;
	line-height: 1.5;
}

.single-article__toc-list .toc-h3 a {
	font-size: 1.3rem;
	color: var(--article-muted);
}

.single-article__toc-list a:hover {
	color: var(--article-accent);
}

.single-article__toc-list .toc-num {
	font-weight: 700;
	margin-right: 0.4em;
}

.single-article__toc-list .toc-h3 .toc-num {
	font-weight: 400;
}

.single-article__toc-list .toc-sep {
	color: #b8b8ba;
	margin-right: 0.6em;
}

@media screen and (max-width: 767px) {
	.single-article__toc {
		max-width: 100%;
		padding: 2rem 1.8rem 3rem 1.8rem;
	}
}


/* ==========================
   Youtube動画
   //ショート<div class="single-article__video single-article__video--vertical">
   //通常<div class="single-article__video single-article__video--horizontal">
========================== */
.single-article__video {
	position: relative;
	width: 100%;
	margin: 2.5rem auto;
	overflow: hidden;
	border-radius: 6px;
	background-color: #000;
}

.single-article__video iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	border: 0;
}

/* ショート動画（縦長） */
.single-article__video--vertical {
	max-width: 360px;
	aspect-ratio: 9 / 16;
}

/* 通常動画（横長） */
.single-article__video--horizontal {
	max-width: 100%;
	aspect-ratio: 16 / 9;
}

/* ==========================
   リード文
========================== */
.single-article__lead {
	font-size: 1.65rem;
	line-height: 1.9;
	color: #444;
	margin-bottom: 2.2rem;
}

/* ==========================
   本文
========================== */
.single-article__body {
	font-size: 1.6rem;
	line-height: 1.9;
	color: #2c2c2c;
}

.single-article__body p {
	margin-bottom: 1.6em;
}

.single-article__body h2 {
	position: relative;
	font-size: 2.2rem;
	font-weight: 700;
	color: var(--article-ink);
	padding: 0.8rem 0 1rem 24px;
	margin: 3.5rem 0 2rem;
	line-height: 1.5;
	/* border-bottom: 2px solid var(--article-line); */
	scroll-margin-top: 20px;
	background: #f4f4f4;
}

.single-article__body h2::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0;
	bottom: 0;
	width: 6px;
	background-color: var(--article-accent);
	border-radius: 0px;
}

.single-article__body h3 {
	position: relative;
	font-size: 2rem;
	font-weight: 700;
	/* color: #bd281e; */
	color: #686868;
	padding-left: 16px;
	margin: 2.2rem 0 1.2rem;
	/* border-bottom: 2px solid var(--article-line); */
	border-bottom: 2px solid #e9c7c5;
}

.single-article__body h3::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0;
	/* transform: translateY(-50%); */
	width: 8px;
	height: 100%;
	background-color: #e3e1dc;
	/* border-radius: 50%; */
}

.single-article__body blockquote {
	position: relative;
	background-color: var(--article-paper);
	border: 1px solid var(--article-line);
	border-radius: 6px;
	padding: 2.4rem 2.2rem 2rem;
	margin: 2rem 0 2.5rem;
	font-size: 1.55rem;
	line-height: 1.85;
	color: #333;
}

.single-article__body blockquote::before {
	content: "\201C";
	position: absolute;
	top: -0.3rem;
	left: 1.4rem;
	font-size: 5rem;
	font-family: Georgia, serif;
	color: var(--article-accent);
	opacity: 0.35;
	line-height: 1;
}

.single-article__body blockquote::after {
	content: "\201D";
	position: absolute;
	bottom: -1.8rem;
	right: 1.4rem;
	font-size: 5rem;
	font-family: Georgia, serif;
	color: var(--article-accent);
	opacity: 0.35;
	line-height: 1;
}

.single-article__body ul:not(.single-article__tags) {
	list-style: disc;
	list-style-position: outside;
	background-color: var(--article-paper);
	border: 1px solid var(--article-line);
	border-radius: 6px;
	padding: 1.8rem 1.8rem 1.8rem 5.6rem;
	margin: 0 0 2rem;
}

.single-article__body ul:not(.single-article__tags) li {
	position: relative;
	padding-left: 0.5em;
	margin-bottom: 0.6em;
}

.single-article__body ul:not(.single-article__tags) li::marker {
	color: var(--article-ink);
}


/* 画像の横並び */
.single-article__body p.img-row {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 1.2rem;
	margin: 2rem 0;
}

.single-article__body p.img-row img {
	display: block;
	width: calc(33.333% - 0.8rem);
	max-width: 300px;
	height: auto;
	margin: 0;
	border-radius: 4px;
}

/* ステップブロック（画像＋テキスト） */
.single-article__body .step-block {
	display: flex;
	align-items: flex-start;
	gap: 1.6rem;
	margin: 2.5rem 0;
}

.single-article__body .step-block__image {
	flex-shrink: 0;
	width: 280px;
}

.single-article__body .step-block__image img {
	display: block;
	width: 100%;
	height: auto;
	margin: 0;
	border-radius: 4px;
}

.single-article__body .step-block__text {
	flex: 1;
}

.single-article__body .step-block__text h4 {
	font-size: 1.7rem;
	font-weight: 700;
	color: var(--article-ink);
	margin: 0 0 0.6rem;
}

.single-article__body .step-block__text p {
	margin-bottom: 0;
}

@media screen and (max-width: 480px) {
	.single-article__body .step-block__image {
		width: 100px;
	}

	.single-article__body .step-block__text h4 {
		font-size: 1.5rem;
	}
}

/* ==========================
   フッター（一覧へ戻る）
========================== */
.single-article__footer {
	margin-top: 3.5rem;
	padding-top: 2rem;
	border-top: 1px solid var(--article-line);
	text-align: left;
}

.single-article__back-link {
	display: inline-block;
	font-size: 1.4rem;
	color: var(--article-muted);
	text-decoration: none;
	padding: 0;
	border: none;
	border-radius: 0;
	transition: color 0.2s;
}

.single-article__back-link:hover {
	background-color: transparent;
	color: var(--article-accent);
}


/* ==========================
   一覧・タグページ共通
========================== */
.sec-article__lst.new-lst {
	list-style: none;
	padding: 0;
	margin: 0;
}

.sec-article__lst .new-lst__item {
	display: flex;
	align-items: baseline;
	gap: 16px;
	padding: 1.4rem 0;
	border-bottom: 1px solid var(--article-line);
}

.sec-article__lst .new-lst__date {
	flex-shrink: 0;
	font-size: 1.3rem;
	color: var(--article-muted);
}

.sec-article__lst .new-lst__link {
	font-size: 1.55rem;
	color: var(--article-ink);
	text-decoration: none;
}

.sec-article__lst .new-lst__link:hover {
	color: var(--article-accent);
}


/* タグ一覧ページ用カード */
.items {
	display: grid;
	grid-template-columns: 1fr;
	gap: 32px;
	margin-bottom: 80px;
}

.items .item {
	display: block;
	text-decoration: none;
	color: inherit;
}

.items .item-cover {
	margin: 0;
	aspect-ratio: 1.91 / 1;
	overflow: hidden;
	background-color: var(--article-paper);
	/* border-radius: 10px; */
}

.items .item-cover-image {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.3s;
	border-radius: 4px;
}

.items .item:hover .item-cover-image {
	transform: scale(1.04);
}

.items .item-title {
	font-size: 1.8rem;
	font-weight: 700;
	line-height: 1.5;
	color: var(--article-ink);
	margin: 1.4rem 0 0.6rem;
	padding: 0 2px;
}

.items .item-meta {
	display: flex;
	flex-direction: column;
	gap: 0px;
	padding: 0 2px;
}

.items .item-date {
	display: inline-block;
	font-size: 1.3rem;
	color: var(--article-muted);
	margin: 0;
}

.items .item-tags {
	display: flex;
	gap: 6px;
	margin: 0;
}

.items .item-tag {
	font-size: 1.2rem;
	color: var(--article-accent);
	background-color: transparent;
	padding: 0;
	font-weight: 500;
	cursor: pointer;
	position: relative;
	z-index: 1;
}

.items .item-tag:hover {
	text-decoration: underline;
}

.inner--wide {
	max-width: 1140px;
}


/* ==========================
   レスポンシブ
========================== */
@media screen and (min-width: 768px) {
	.single-article__title {
		font-size: 3.6rem;
		/* padding-bottom: 2rem; */
	}

	.single-article__title::after {
		width: 80px;
		height: 6px;
	}

	.single-article__body {
		font-size: 1.65rem;
	}

	.single-article__body h2 {
		font-size: 2.6rem;
	}

	.items {
		grid-template-columns: repeat(3, 1fr);
		gap: 20px;
	}

	/* .items .item-title {
		font-size: 1.6rem;
	} */
}

@media screen and (max-width: 767px) {
	.single-article__body .step-block__image {
		width: 140px;
	}
}