/* =========================================================
   Kitamae Shoten — main.css
   配色:藍鉄 / 縹 / 胡粉(紙白)/ 墨 / 蘇芳
   書体:しっぽり明朝 B1(見出し)/ Noto Serif JP(本文)/ Zen Kaku Gothic New(UI)
   ========================================================= */

:root {
	--c-ink: #26262b;        /* 墨:本文 */
	--c-paper: #f5f3ee;      /* 胡粉:地 */
	--c-paper-deep: #ebe8df; /* 地の陰 */
	--c-ai: #1b3a55;         /* 藍鉄:主 */
	--c-ai-deep: #11273c;    /* 藍の底 */
	--c-hanada: #37648f;     /* 縹:リンク */
	--c-suou: #8e3b3f;       /* 蘇芳:差し色(花布の赤) */
	--c-line: #cfcabc;

	--font-display: "Shippori Mincho B1", serif;
	--font-body: "Noto Serif JP", serif;
	--font-ui: "Zen Kaku Gothic New", sans-serif;

	--w-content: 1080px;
	--w-text: 680px;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
	margin: 0;
	font-family: var(--font-body);
	font-size: 16px;
	line-height: 2;
	letter-spacing: 0.04em;
	color: var(--c-ink);
	background: var(--c-paper);
	font-feature-settings: "palt";
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-hanada); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--c-suou); }
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.6; letter-spacing: 0.06em; }

.screen-reader-text {
	position: absolute; width: 1px; height: 1px;
	clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}
.skip-link {
	position: absolute; left: 8px; top: -48px;
	background: var(--c-ai); color: #fff; padding: 10px 16px;
	font-family: var(--font-ui); z-index: 100; transition: top .2s;
}
.skip-link:focus { top: 8px; }
:focus-visible { outline: 2px solid var(--c-suou); outline-offset: 3px; }

/* ---------- 縦書きユーティリティ ---------- */
.tategaki {
	writing-mode: vertical-rl;
	text-orientation: upright;
	letter-spacing: 0.18em;
}

/* ---------- Header ---------- */
.site-header {
	background: var(--c-paper);
	border-bottom: 1px solid var(--c-line);
	position: sticky; top: 0; z-index: 50;
}
.site-header__inner {
	max-width: var(--w-content);
	margin: 0 auto; padding: 0 20px;
	display: flex; align-items: center; justify-content: space-between;
	min-height: 80px; gap: 24px;
}
.site-brand__title {
	font-family: var(--font-display);
	font-size: 1.35rem; font-weight: 800;
	color: var(--c-ink); text-decoration: none;
	display: inline-flex; align-items: center; gap: 10px;
}
.site-brand__mark {
	width: 14px; height: 14px;
	background: var(--c-ai);
	border-right: 4px solid var(--c-suou); /* 背に貼った花布 */
}
/* カスタムロゴ(横長:帆船左・文字右) */
.site-brand .custom-logo-link { display: inline-flex; align-items: center; }
.site-brand .custom-logo { height: 58px; width: auto; }
@media (max-width: 600px) {
	.site-brand .custom-logo { height: 48px; }
}
.site-nav__list {
	display: flex; gap: 28px; margin: 0; padding: 0; list-style: none;
	font-family: var(--font-ui); font-size: 0.95rem;
}
.site-nav__list a { color: var(--c-ink); text-decoration: none; }
.site-nav__list a:hover { color: var(--c-suou); }

.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero { border-bottom: 1px solid var(--c-line); background:
	linear-gradient(180deg, var(--c-paper) 0%, var(--c-paper-deep) 100%);
}
.hero__inner {
	max-width: var(--w-content); margin: 0 auto;
	padding: 72px 20px 80px;
	display: flex; gap: 56px; align-items: stretch; justify-content: flex-start;
}
.hero__title {
	font-family: var(--font-display);
	font-size: clamp(1.7rem, 3.4vw, 2.6rem);
	font-weight: 600;
	margin: 0;
	min-height: 300px; max-height: 420px;
	padding-left: 28px;
	border-left: 1px solid var(--c-line);
	color: var(--c-ai-deep);
	animation: kitamae-rise .8s ease both;
}
.hero__lead { max-width: 480px; align-self: center; }
.hero__publisher {
	font-family: var(--font-ui); font-size: 0.85rem; letter-spacing: 0.3em;
	color: var(--c-suou); margin: 0 0 8px;
}
.hero__text { margin: 0 0 28px; }
@keyframes kitamae-rise {
	from { opacity: 0; transform: translateY(10px); }
	to   { opacity: 1; transform: none; }
}

/* ---------- Buttons ---------- */
.button {
	display: inline-block;
	font-family: var(--font-ui); font-size: 0.95rem;
	background: var(--c-ai); color: #fff;
	padding: 12px 32px; text-decoration: none;
	border: 1px solid var(--c-ai);
	transition: background .2s, color .2s;
}
.button:hover { background: var(--c-ai-deep); color: #fff; }
.button--ghost { background: transparent; color: var(--c-ai); }
.button--ghost:hover { background: var(--c-ai); color: #fff; }

/* ---------- Home sections ---------- */
.home-section { max-width: var(--w-content); margin: 0 auto; padding: 72px 20px; }
.home-section--alt { background: transparent; border-top: 1px solid var(--c-line); }
.home-section__header {
	display: flex; align-items: baseline; justify-content: space-between;
	margin-bottom: 40px;
}
.home-section__title {
	font-size: 1.5rem; margin: 0;
	padding-left: 14px; border-left: 4px solid var(--c-suou);
}
.home-section__more { font-family: var(--font-ui); font-size: 0.9rem; }

/* ---------- Book cards ---------- */
.book-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
	gap: 40px 28px;
}
.book-card__link { text-decoration: none; color: inherit; display: block; }
.book-card__cover {
	aspect-ratio: 5 / 7;
	background: var(--c-ai);
	display: flex; align-items: center; justify-content: center;
	box-shadow: 3px 4px 0 rgba(38, 38, 43, .12);
	transition: transform .25s, box-shadow .25s;
	overflow: hidden;
}
.book-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.book-card__link:hover .book-card__cover {
	transform: translateY(-4px);
	box-shadow: 5px 8px 0 rgba(38, 38, 43, .16);
}
.book-card__spine { color: #fff; font-family: var(--font-display); font-size: 1.05rem; max-height: 85%; overflow: hidden; }
.book-card__title { font-size: 1.02rem; margin: 14px 0 4px; }
.book-card__author { font-family: var(--font-ui); font-size: 0.82rem; color: #6b6a63; margin: 0; }

/* ---------- Bookshelf(背表紙の棚)---------- */
.bookshelf { max-width: var(--w-content); margin: 0 auto 72px; padding: 0 20px; }
.bookshelf__row {
	display: flex; align-items: flex-end; gap: 6px;
	padding: 0 12px; overflow-x: auto;
}
.bookshelf__spine {
	display: inline-flex; flex-direction: column; justify-content: flex-start;
	gap: 14px;
	min-height: 240px;
	padding: 20px 12px;
	background: var(--c-ai);
	color: #fff; text-decoration: none;
	border-top: 6px solid var(--c-suou); /* 天の花布 */
	transition: transform .2s, background .2s;
}
.bookshelf__spine:nth-child(3n)   { background: var(--c-ai-deep); min-height: 262px; }
.bookshelf__spine:nth-child(4n+2) { background: var(--c-hanada);  min-height: 250px; }
.bookshelf__spine:hover { transform: translateY(-10px); color: #fff; }
.bookshelf__spine-title { font-family: var(--font-display); font-size: 1rem; }
.bookshelf__spine-author { font-family: var(--font-ui); font-size: 0.72rem; opacity: .85; }
.bookshelf__board {
	height: 12px; background: var(--c-ai-deep);
	box-shadow: 0 6px 0 var(--c-paper-deep);
}

/* ---------- Post cards ---------- */
.post-list { display: grid; gap: 0; }
.post-card { border-bottom: 1px solid var(--c-line); }
.post-card:first-child { border-top: 1px solid var(--c-line); }
.post-card__link {
	display: block; padding: 26px 8px; text-decoration: none; color: inherit;
	transition: background .2s;
}
.post-card__link:hover { background: rgba(27, 58, 85, .05); }
.post-card__meta {
	font-family: var(--font-ui); font-size: 0.82rem; color: #6b6a63;
	display: flex; gap: 14px; align-items: center; margin-bottom: 6px;
}
.post-card__category { color: var(--c-suou); }
.post-card__title { font-size: 1.1rem; margin: 0 0 6px; }
.post-card__excerpt { margin: 0; font-size: 0.92rem; color: #4c4b45; }

/* ---------- Page header ---------- */
.page-header {
	max-width: var(--w-content); margin: 0 auto;
	padding: 64px 20px 32px;
}
.page-header__title { font-size: 1.8rem; margin: 0 0 8px; }
.page-header__lead { margin: 0; color: #4c4b45; }

/* ---------- Genre nav ---------- */
.genre-nav {
	max-width: var(--w-content); margin: 0 auto 40px; padding: 0 20px;
	display: flex; flex-wrap: wrap; gap: 10px;
	font-family: var(--font-ui); font-size: 0.9rem;
}
.genre-nav__item {
	padding: 6px 18px; border: 1px solid var(--c-line);
	text-decoration: none; color: var(--c-ink); background: #fff;
}
.genre-nav__item.is-active,
.genre-nav__item:hover { background: var(--c-ai); border-color: var(--c-ai); color: #fff; }

/* ---------- 書籍詳細 ---------- */
.book-single { max-width: var(--w-content); margin: 0 auto; padding: 64px 20px 0; }
.book-single__hero { display: grid; grid-template-columns: minmax(240px, 340px) 1fr; gap: 56px; }
.book-single__cover {
	background: var(--c-ai);
	aspect-ratio: 5 / 7;
	box-shadow: 6px 8px 0 rgba(38, 38, 43, .12);
	display: flex; align-items: center; justify-content: center;
	overflow: hidden;
}
.book-single__cover img { width: 100%; height: 100%; object-fit: cover; }
.book-single__cover-fallback { color: #fff; font-family: var(--font-display); font-size: 1.4rem; }
.book-single__genre { font-family: var(--font-ui); font-size: 0.85rem; margin: 0 0 6px; }
.book-single__genre a { margin-right: 10px; text-decoration: none; color: var(--c-suou); }
.book-single__title { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 0 0 8px; }
.book-single__author { font-family: var(--font-ui); font-size: 1rem; color: #4c4b45; margin: 0 0 20px; }
.book-single__catch { font-size: 1.05rem; border-left: 3px solid var(--c-suou); padding-left: 16px; margin: 0 0 28px; }
.book-single__data { margin: 0 0 28px; font-size: 0.92rem; border-top: 1px solid var(--c-line); }
.book-single__data > div { display: flex; border-bottom: 1px solid var(--c-line); padding: 10px 4px; }
.book-single__data dt { width: 6.5em; font-family: var(--font-ui); color: #6b6a63; }
.book-single__data dd { margin: 0; }
.book-single__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.book-single__body { max-width: var(--w-text); margin: 64px auto 0; padding-bottom: 72px; }

/* ---------- 関連情報 ---------- */
.related-posts {
	border-top: 1px solid var(--c-line);
	background: var(--c-paper-deep);
	padding: 64px 20px 80px;
}
.related-posts__title {
	max-width: var(--w-content); margin: 0 auto 32px;
	font-size: 1.35rem;
	padding-left: 14px; border-left: 4px solid var(--c-suou);
}
.related-posts .post-list { max-width: var(--w-content); margin: 0 auto; }
.related-posts .post-card__link:hover { background: rgba(255, 255, 255, .5); }

/* 記事側:関連書籍カード */
.related-book { max-width: var(--w-text); margin: 0 auto; padding: 0 20px 80px; }
.related-book__heading { font-size: 1.15rem; padding-left: 12px; border-left: 4px solid var(--c-suou); }
.related-book__card {
	display: flex; gap: 24px; align-items: center;
	background: #fff; border: 1px solid var(--c-line);
	padding: 20px; text-decoration: none; color: inherit;
	transition: box-shadow .2s;
}
.related-book__card:hover { box-shadow: 4px 6px 0 rgba(38, 38, 43, .1); }
.related-book__cover { width: 96px; flex-shrink: 0; background: var(--c-ai); aspect-ratio: 5/7; overflow: hidden; }
.related-book__cover img { width: 100%; height: 100%; object-fit: cover; }
.related-book__title { font-family: var(--font-display); font-size: 1.05rem; margin: 0 0 4px; }
.related-book__author { font-family: var(--font-ui); font-size: 0.85rem; color: #6b6a63; margin: 0 0 10px; }
.related-book__more { font-family: var(--font-ui); font-size: 0.85rem; color: var(--c-hanada); }

/* ---------- 記事詳細 ---------- */
.entry { max-width: var(--w-text); margin: 0 auto; padding: 64px 20px; }
.entry__meta {
	font-family: var(--font-ui); font-size: 0.85rem; color: #6b6a63;
	display: flex; gap: 14px; margin-bottom: 10px;
}
.entry__category { color: var(--c-suou); text-decoration: none; }
.entry__title { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 32px; }
.entry__thumbnail { margin: 0 0 40px; }
.entry-content p { margin: 0 0 1.8em; }
.entry-content h2 {
	font-size: 1.35rem; margin: 2.4em 0 1em;
	padding-left: 14px; border-left: 4px solid var(--c-suou);
}
.entry-content h3 { font-size: 1.15rem; margin: 2em 0 0.8em; }
.entry-content blockquote {
	margin: 2em 0; padding: 4px 0 4px 20px;
	border-left: 2px solid var(--c-hanada); color: #4c4b45;
}
.entry-content img { margin: 2em auto; }
.wp-block-image figcaption { font-family: var(--font-ui); font-size: 0.8rem; color: #6b6a63; text-align: center; }

/* ---------- Pagination ---------- */
.pagination { max-width: var(--w-content); margin: 0 auto; padding: 40px 20px 80px; font-family: var(--font-ui); }
.pagination .nav-links { display: flex; gap: 10px; }
.pagination .page-numbers {
	padding: 8px 16px; border: 1px solid var(--c-line);
	text-decoration: none; color: var(--c-ink); background: #fff;
}
.pagination .page-numbers.current,
.pagination .page-numbers:hover { background: var(--c-ai); border-color: var(--c-ai); color: #fff; }

/* ---------- 汎用 ---------- */
.empty-note { max-width: var(--w-content); margin: 0 auto; padding: 40px 20px 100px; color: #6b6a63; }
.post-list--archive,
.book-grid--archive { max-width: var(--w-content); margin: 0 auto 80px; padding: 0 20px; }

/* ---------- Footer ---------- */
.site-footer {
	background: var(--c-ai-deep); color: #d9d6cc;
	padding: 56px 20px 24px; margin-top: 0;
	border-top: 6px solid var(--c-suou);
}
.site-footer__inner {
	max-width: var(--w-content); margin: 0 auto 32px;
	display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.site-footer__name { font-family: var(--font-display); font-size: 1.3rem; color: #fff; margin: 0 0 6px; }
.site-footer__tagline { font-family: var(--font-ui); font-size: 0.85rem; margin: 0; opacity: .8; }
.site-footer__list { list-style: none; display: flex; gap: 24px; margin: 0; padding: 0; font-family: var(--font-ui); font-size: 0.9rem; }
.site-footer__list a { color: #d9d6cc; text-decoration: none; }
.site-footer__list a:hover { color: #fff; }
.site-footer__copy {
	max-width: var(--w-content); margin: 0 auto;
	font-family: var(--font-ui); font-size: 0.78rem; opacity: .6;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
	.hero__inner { flex-direction: row-reverse; gap: 32px; padding: 48px 20px 56px; }
	.hero__title { min-height: 240px; font-size: 1.5rem; }
	.book-single__hero { grid-template-columns: 1fr; gap: 32px; }
	.book-single__cover { max-width: 280px; margin: 0 auto; }
}

@media (max-width: 720px) {
	.nav-toggle {
		display: inline-flex; align-items: center; justify-content: center;
		width: 44px; height: 44px;
		background: transparent; border: 1px solid var(--c-line); cursor: pointer;
	}
	.nav-toggle__bar {
		display: block; width: 18px; height: 2px; background: var(--c-ink);
		position: relative;
	}
	.nav-toggle__bar::before, .nav-toggle__bar::after {
		content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--c-ink);
	}
	.nav-toggle__bar::before { top: -6px; }
	.nav-toggle__bar::after { top: 6px; }
	.nav-toggle__bar, .nav-toggle__bar::before, .nav-toggle__bar::after { transition: transform .25s, top .25s, background .2s; }
	.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
	.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { top: 0; transform: rotate(45deg); }
	.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after { top: 0; transform: rotate(-45deg); }

	.site-nav { display: none; width: 100%; }
	.site-nav.is-open { display: block; }
	.site-header__inner { flex-wrap: wrap; padding-block: 12px; }
	.site-nav__list { flex-direction: column; gap: 0; border-top: 1px solid var(--c-line); }
	.site-nav__list li { border-bottom: 1px solid var(--c-line); }
	.site-nav__list a { display: block; padding: 14px 4px; }

	.book-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 16px; }
	.bookshelf__spine { min-height: 200px; padding: 14px 9px; }
	.home-section { padding: 48px 20px; }
}

@media (prefers-reduced-motion: reduce) {
	*, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ---------- カスタムブック(サービスページ) ---------- */
.service-hero {
	border-bottom: 1px solid var(--c-line);
	background: linear-gradient(180deg, var(--c-paper) 0%, var(--c-paper-deep) 100%);
}
.service-hero__inner { max-width: var(--w-content); margin: 0 auto; padding: 72px 20px; }
.service-hero__eyebrow {
	font-family: var(--font-ui); font-size: 0.82rem; letter-spacing: 0.32em;
	color: var(--c-suou); margin: 0 0 10px;
}
.service-hero__title { font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin: 0 0 20px; color: var(--c-ai-deep); }
.service-hero__lead { max-width: var(--w-text); }
.service-hero__lead p { margin: 0 0 1.2em; }

.service-section { max-width: var(--w-content); margin: 0 auto; padding: 72px 20px; }
.service-section--alt {
	max-width: none;
	background: var(--c-paper-deep);
	border-top: 1px solid var(--c-line);
	border-bottom: 1px solid var(--c-line);
}
.service-section--alt > * { max-width: var(--w-content); margin-left: auto; margin-right: auto; }
.service-section__title { font-size: 1.5rem; margin: 0 0 40px; padding-left: 14px; border-left: 4px solid var(--c-suou); }

.usecase-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.usecase { background: #fff; border: 1px solid var(--c-line); padding: 28px 30px; }
.usecase__title {
	font-size: 1.1rem; margin: 0 0 10px;
	padding-bottom: 10px; border-bottom: 1px solid var(--c-line);
}
.usecase p { margin: 0; font-size: 0.95rem; color: #4c4b45; }

.flow { list-style: none; margin: 0; padding: 0; counter-reset: flow; display: grid; gap: 0; }
.flow__step {
	counter-increment: flow;
	display: grid; grid-template-columns: 64px 1fr; gap: 20px;
	padding: 26px 8px; border-bottom: 1px solid var(--c-line);
	position: relative;
}
.flow__step:first-child { border-top: 1px solid var(--c-line); }
.flow__step::before {
	content: counter(flow, cjk-ideographic);
	font-family: var(--font-display); font-size: 1.5rem; color: var(--c-suou);
	display: flex; align-items: flex-start; justify-content: center;
}
.flow__step h3 { font-size: 1.1rem; margin: 0 0 6px; }
.flow__step p { margin: 0; font-size: 0.95rem; color: #4c4b45; }

.service-price { max-width: var(--w-text); }
.service-price p { margin: 0; }

.service-cta { background: var(--c-ai); color: #fff; }
.service-cta__inner { max-width: var(--w-content); margin: 0 auto; padding: 64px 20px; text-align: center; }
.service-cta__title { color: #fff; font-size: 1.4rem; margin: 0 0 12px; }
.service-cta p { margin: 0 auto 28px; max-width: 34em; opacity: .9; }
.service-cta .button { background: #fff; color: var(--c-ai); border-color: #fff; }
.service-cta .button:hover { background: var(--c-suou); color: #fff; border-color: var(--c-suou); }

@media (max-width: 640px) {
	.usecase-grid { grid-template-columns: 1fr; }
	.flow__step { grid-template-columns: 44px 1fr; gap: 12px; }
	.service-section { padding: 48px 20px; }
}

/* ---------- 北前書店について ---------- */
.about-hero { border-bottom: 1px solid var(--c-line); background: linear-gradient(180deg, var(--c-paper) 0%, var(--c-paper-deep) 100%); }
.about-hero__inner {
	max-width: var(--w-content); margin: 0 auto; padding: 72px 20px;
	display: flex; justify-content: space-between; align-items: flex-start; gap: 40px;
}
.about-hero__eyebrow { font-family: var(--font-ui); font-size: 0.82rem; letter-spacing: 0.32em; color: var(--c-suou); margin: 0 0 10px; }
.about-hero__title { font-size: clamp(1.7rem, 3.4vw, 2.4rem); margin: 0; color: var(--c-ai-deep); }
.about-hero__copy {
	font-family: var(--font-display); font-size: 1.25rem; color: var(--c-ai);
	min-height: 200px; padding-left: 20px; border-left: 1px solid var(--c-line);
}
.about-philosophy { border-bottom: 1px solid var(--c-line); }
.about-philosophy__inner { max-width: var(--w-text); margin: 0 auto; padding: 64px 20px; }
.about-philosophy__inner p { margin: 0 0 1.8em; }
.about-philosophy__inner p:first-child::first-letter { font-size: 1.6em; color: var(--c-suou); }

.about-section { max-width: var(--w-content); margin: 0 auto; padding: 64px 20px 0; }
.about-section--company { padding-bottom: 96px; }
.about-section__title { font-size: 1.4rem; margin: 0 0 28px; padding-left: 14px; border-left: 4px solid var(--c-suou); }
.about-table { width: 100%; max-width: 760px; border-collapse: collapse; font-size: 0.95rem; }
.about-table th, .about-table td { border-bottom: 1px solid var(--c-line); padding: 14px 8px; text-align: left; vertical-align: top; }
.about-table tr:first-child th, .about-table tr:first-child td { border-top: 1px solid var(--c-line); }
.about-table th { width: 9em; font-family: var(--font-ui); font-weight: 500; color: #6b6a63; }

@media (max-width: 640px) {
	.about-hero__copy { display: none; }
	.about-table th { width: 6.5em; }
}