/* =============================================================================
   おすすめ書籍ページ専用スタイル — page-recommended-books.php
   ============================================================================= */

/* =============================================================================
   Section 1: ヒーロー
   ============================================================================= */
.rec-hero {
	position: relative;
	width: 100%;
	min-height: 400px;
	display: flex;
	align-items: center;
	overflow: hidden;
	background: #0D1117 url('../images/rec-books-hero-bg.png') center center / cover no-repeat;
}

.rec-hero-overlay {
	position: absolute;
	inset: 0;
	z-index: 1;
}
.rec-hero-overlay::before {
	content: '';
	position: absolute;
	top: -20%;
	left: -10%;
	width: 60%;
	height: 140%;
	background: linear-gradient(160deg, #2B6CB0 0%, #1E5A9E 100%);
	opacity: 0.14;
	transform: skewX(-18deg);
}
.rec-hero-overlay::after {
	content: '';
	position: absolute;
	top: -30%;
	left: 10%;
	width: 40%;
	height: 160%;
	background: linear-gradient(170deg, #1E5A9E 0%, #2B6CB0 100%);
	opacity: 0.18;
	transform: skewX(-22deg);
}

.rec-hero-slash {
	position: absolute;
	inset: 0;
	z-index: 1;
	pointer-events: none;
}
.rec-hero-slash::before {
	content: '';
	position: absolute;
	top: -25%;
	left: 40%;
	width: 28%;
	height: 150%;
	background: linear-gradient(155deg, #4A90D9 0%, #2B6CB0 100%);
	opacity: 0.07;
	transform: skewX(-15deg);
}
.rec-hero-slash::after {
	content: '';
	position: absolute;
	top: -10%;
	left: 60%;
	width: 50%;
	height: 120%;
	background: linear-gradient(150deg, #1A365D 0%, #0D1117 100%);
	opacity: 0.22;
	transform: skewX(-12deg);
}

.rec-hero-inner {
	position: relative;
	z-index: 2;
	padding: 80px var(--container-padding-x);
	width: 100%;
	max-width: var(--container-max-width);
	margin: 0 auto;
}

.rec-hero-eyebrow {
	font-family: var(--font-family-heading);
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 4px;
	color: var(--color-primary);
	margin-bottom: 20px;
	text-transform: uppercase;
}

.rec-hero-title {
	font-family: var(--font-family-heading);
	font-size: 40px;
	font-weight: 700;
	color: var(--color-white);
	line-height: 1.35;
	margin-bottom: 20px;
}

.rec-hero-sub {
	font-size: 16px;
	color: rgba(255, 255, 255, 0.65);
	line-height: 1.8;
	margin-bottom: 36px;
}

.rec-hero-stats {
	display: flex;
	gap: 40px;
	flex-wrap: wrap;
}

.rec-hero-stat {
	display: flex;
	flex-direction: column;
	gap: 4px;
}

.rec-hero-stat-num {
	font-family: var(--font-family-heading);
	font-size: 36px;
	font-weight: 700;
	color: var(--color-white);
	line-height: 1;
}

.rec-hero-stat-label {
	font-size: 12px;
	color: rgba(255, 255, 255, 0.45);
	letter-spacing: 0.5px;
}

/* =============================================================================
   Section 2: カタログ（フィルター + グリッド）
   ============================================================================= */
.rec-catalog {
	padding: var(--section-padding-y) 0;
	background: var(--color-bg-white);
}

/* カテゴリフィルター */
.rec-filters {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
	margin-bottom: 40px;
}

.rec-filter-btn {
	font-family: var(--font-family-heading);
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.3px;
	padding: 8px 20px;
	border: 1.5px solid var(--color-border);
	background: var(--color-bg-white);
	color: var(--color-sub);
	cursor: pointer;
	border-radius: 999px;
	transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.rec-filter-btn:hover {
	border-color: var(--color-primary);
	color: var(--color-primary);
}

.rec-filter-btn.is-active {
	background: var(--color-primary);
	border-color: var(--color-primary);
	color: #fff;
}

/* 書籍グリッド */
.rec-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 24px;
}

/* =============================================================================
   書籍カード
   ============================================================================= */
.rec-book-card {
	display: flex;
	flex-direction: column;
	border: 1px solid var(--color-border);
	border-top: 4px solid var(--color-primary); /* デフォルト：プライマリブルー */
	background: var(--color-bg-white);
	transition: box-shadow 0.2s, transform 0.2s;
}

.rec-book-card:hover {
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.09);
	transform: translateY(-3px);
}

/* 書籍カバー画像 */
.rec-book-cover-link {
	display: block;
	overflow: hidden;
	border-bottom: 1px solid var(--color-border);
}

.rec-book-cover {
	padding: 24px 20px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: #fafafa;
	min-height: 200px;
}

.rec-book-cover-img {
	max-height: 170px;
	width: auto;
	max-width: 100%;
	object-fit: contain;
	display: block;
	box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.rec-book-cover-link:hover .rec-book-cover-img {
	transform: scale(1.03);
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

/* カテゴリ別ボーダーカラー */
.rec-book-card--pm       { border-top-color: #2B6CB0; }
.rec-book-card--ai       { border-top-color: #7C3AED; }
.rec-book-card--business { border-top-color: #E8956D; }
.rec-book-card--career   { border-top-color: #059669; }

.rec-book-card-body {
	flex: 1;
	padding: 28px 24px 20px;
	display: flex;
	flex-direction: column;
	gap: 0;
}

.rec-book-card-meta {
	margin-bottom: 12px;
}

/* カテゴリバッジ */
.rec-book-cat-badge {
	display: inline-block;
	font-family: var(--font-family-heading);
	font-size: 10px;
	font-weight: 700;
	letter-spacing: 0.5px;
	padding: 3px 10px;
	border-radius: 999px;
	text-transform: uppercase;
}

.rec-book-cat-badge--pm {
	background: rgba(43, 108, 176, 0.1);
	color: #2B6CB0;
}
.rec-book-cat-badge--ai {
	background: rgba(124, 58, 237, 0.1);
	color: #7C3AED;
}
.rec-book-cat-badge--business {
	background: rgba(232, 149, 109, 0.15);
	color: #C06A38;
}
.rec-book-cat-badge--career {
	background: rgba(5, 150, 105, 0.1);
	color: #059669;
}

/* タイトル */
.rec-book-title {
	font-family: var(--font-family-heading);
	font-size: 15px;
	font-weight: 700;
	color: var(--color-heading);
	line-height: 1.55;
	margin-bottom: 8px;
}

/* 著者・出版社 */
.rec-book-author {
	font-size: 12px;
	color: var(--color-sub);
	margin-bottom: 12px;
	line-height: 1.5;
}

.rec-book-publisher {
	color: var(--color-sub);
}

/* タグ（おすすめポイント） */
.rec-book-tag {
	display: inline-block;
	font-family: var(--font-family-heading);
	font-size: 11px;
	font-weight: 600;
	letter-spacing: 0.3px;
	padding: 3px 10px;
	background: var(--color-bg-gray);
	color: var(--color-sub);
	margin-bottom: 14px;
}

/* おすすめ理由 */
.rec-book-reason {
	font-size: 13px;
	color: var(--color-body);
	line-height: 1.8;
	margin-top: auto;
	padding-top: 14px;
	border-top: 1px solid var(--color-border);
}

/* カードフッター */
.rec-book-card-footer {
	padding: 16px 24px;
	border-top: 1px solid var(--color-border);
	background: var(--color-bg-gray);
	display: flex;
	gap: 12px;
	flex-wrap: wrap;
	align-items: center;
}

/* Amazon ボタン */
.rec-book-amazon-btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	font-family: var(--font-family-heading);
	font-size: 13px;
	font-weight: 700;
	color: var(--color-accent);
	text-decoration: none;
	transition: color 0.2s, gap 0.2s;
	padding: 2px 0;
}

.rec-book-amazon-btn:hover {
	color: var(--color-accent-hover, #C06A38);
	gap: 10px;
}

.rec-book-amazon-btn:hover > svg:last-child {
	transform: translate(2px, -2px);
	transition: transform 0.2s;
}

/* 楽天ボタン */
.rec-book-rakuten-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-family: var(--font-family-heading);
	font-size: 12px;
	font-weight: 600;
	color: #BF0000;
	text-decoration: none;
	transition: color 0.2s, gap 0.2s;
	padding: 2px 0;
}

.rec-book-rakuten-btn:hover {
	color: #8B0000;
	gap: 8px;
}

.rec-book-rakuten-btn:hover > svg {
	transform: translate(2px, -2px);
	transition: transform 0.2s;
}

/* リンク準備中テキスト */
.rec-book-link-pending {
	font-size: 12px;
	color: var(--color-sub);
	margin: 0;
}

/* 結果なし */
.rec-no-results {
	text-align: center;
	padding: 48px;
	font-size: 15px;
	color: var(--color-sub);
}

/* =============================================================================
   Section 3: アフィリエイト開示 + CTA
   ============================================================================= */
.rec-cta {
	padding: var(--section-padding-y) 0;
	background: var(--color-bg-gray);
}

/* アフィリエイト開示 */
.rec-disclosure {
	display: flex;
	align-items: flex-start;
	gap: 10px;
	max-width: 720px;
	margin: 0 auto 56px;
	padding: 16px 20px;
	background: var(--color-bg-white);
	border: 1px solid var(--color-border);
	border-radius: 4px;
}

.rec-disclosure svg {
	flex-shrink: 0;
	color: var(--color-sub);
	margin-top: 1px;
}

.rec-disclosure p {
	font-size: 12px;
	color: var(--color-sub);
	line-height: 1.7;
	margin: 0;
}

/* CTA ブロック */
.rec-cta-inner {
	text-align: center;
}

.rec-cta-title {
	font-family: var(--font-family-heading);
	font-size: 28px;
	font-weight: 700;
	color: var(--color-heading);
	margin-bottom: 16px;
}

.rec-cta-sub {
	font-size: 15px;
	color: var(--color-body);
	line-height: 1.8;
	margin-bottom: 36px;
}

.rec-cta-btns {
	display: flex;
	flex-wrap: wrap;
	gap: 16px;
	justify-content: center;
	align-items: center;
}

/* =============================================================================
   レスポンシブ
   ============================================================================= */

/* 1024px */
@media (max-width: 1024px) {
	.rec-grid {
		grid-template-columns: repeat(2, 1fr);
	}
	.rec-hero-title {
		font-size: 34px;
	}
}

/* 768px */
@media (max-width: 768px) {
	.rec-hero {
		min-height: auto;
	}
	.rec-hero-inner {
		padding: 60px var(--container-padding-x);
	}
	.rec-hero-title {
		font-size: 28px;
	}
	.rec-hero-sub {
		font-size: 14px;
	}
	.rec-grid {
		grid-template-columns: 1fr;
	}
	.rec-cta-title {
		font-size: 22px;
	}
	.rec-cta-btns {
		flex-direction: column;
		align-items: center;
	}
}

/* 480px */
@media (max-width: 480px) {
	.rec-hero-stats {
		gap: 24px;
	}
	.rec-hero-stat-num {
		font-size: 28px;
	}
	.rec-filters {
		gap: 6px;
	}
	.rec-filter-btn {
		font-size: 12px;
		padding: 7px 14px;
	}
}