/* ==========================================================================
   橘書房 TACHIBANA BOOKS  共通スタイル
   版の管理：HTML側で style.css?v=1 のように番号を上げる
   ========================================================================== */

:root {
  --paper: #f8f6f0;        /* 生成り */
  --paper-deep: #f0ece2;
  --white: #ffffff;
  --ink: #23211e;          /* 墨 */
  --ink-soft: #55514a;
  --ink-muted: #8a847a;
  --line: #e2dccf;
  --line-strong: #cfc6b4;
  --green: #18403b;        /* 深い緑（差し色の主） */
  --green-deep: #0f2a27;
  --green-ink: #e9e4d6;    /* 深緑の地に置く文字 */
  --gold: #a68a56;         /* 鈍い金（罫線と小さな飾りのみ） */
  --gold-soft: #c8b48a;
  --shu: #b23a2b;          /* 朱（落款マークのみ） */

  --font-serif: 'Noto Serif JP', 'Yu Mincho', 'YuMincho', 'Hiragino Mincho ProN', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-latin: 'Cormorant Garamond', 'Times New Roman', serif;

  --wrap: 1120px;
  --measure: 40em;
  --gutter: 20px;
  --header-h: 76px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.95;
  letter-spacing: 0.04em;
  font-feature-settings: "palt" 0;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--green); }

:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

h1, h2, h3, h4 { font-weight: 500; line-height: 1.5; margin: 0; letter-spacing: 0.08em; }
p { margin: 0 0 1.2em; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link {
  position: absolute; left: 8px; top: -60px; z-index: 200;
  background: var(--ink); color: var(--white); padding: 8px 14px; font-family: var(--font-sans); font-size: 14px;
}
.skip-link:focus { top: 8px; color: var(--white); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

/* --------------------------------------------------------------------------
   ロゴ（仮。正式ロゴができたら .brand の中身を差し替える）
   -------------------------------------------------------------------------- */
.seal {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; flex: none;
  background: var(--shu); color: #faf6ee;
  font-family: var(--font-serif); font-weight: 600; font-size: 19px; line-height: 1;
  border-radius: 2px; letter-spacing: 0;
}

.brand { display: inline-flex; align-items: center; gap: 14px; color: var(--ink); }
.brand-logo { height: 34px; width: auto; }
.brand > .brand-en { margin-top: 0; padding-top: 4px; }
/* ヘッダー左上：篆書＋TACHIBANA BOOKS の一体ロゴ（images/logo-header.png） */
.site-header .brand-logo--header { height: 52px; }
.brand:hover { color: var(--ink); }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-ja { font-size: 19px; font-weight: 600; letter-spacing: 0.32em; }
.brand-en { font-family: var(--font-latin); font-size: 11px; letter-spacing: 0.32em; color: var(--green); margin-top: 3px; }

/* --------------------------------------------------------------------------
   ヘッダー
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  /* backdrop-filter は使わない：付けると全画面メニュー（position: fixed）がヘッダーの高さに閉じ込められ、ロゴと重なる */
  background: rgba(248, 246, 240, 0.97);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.site-header .wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.global-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 28px; }
.global-nav a {
  font-family: var(--font-sans); font-size: 13.5px; letter-spacing: 0.1em; color: var(--ink-soft);
  padding: 6px 0; position: relative;
}
.global-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--gold); transform: scaleX(0); transition: transform .3s ease;
}
.global-nav a:hover, .global-nav a[aria-current="page"] { color: var(--ink); }
.global-nav a:hover::after, .global-nav a[aria-current="page"]::after { transform: scaleX(1); }

.nav-toggle {
  display: none; width: 44px; height: 44px; margin-right: -10px; padding: 0;
  background: none; border: 0; cursor: pointer; position: relative; z-index: 120;
}
.nav-toggle span { position: absolute; left: 11px; width: 22px; height: 1px; background: var(--ink); transition: transform .3s ease, opacity .3s ease; }
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1023px) {
  .nav-toggle { display: block; }
  .global-nav {
    position: fixed; inset: 0; z-index: 110;
    background: var(--paper);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transition: opacity .3s ease, visibility .3s ease;
  }
  .nav-open .global-nav { opacity: 1; visibility: visible; }
  .site-header .brand { position: relative; z-index: 120; }
  .global-nav ul { flex-direction: column; align-items: center; gap: 22px; }
  .global-nav a { font-family: var(--font-serif); font-size: 18px; color: var(--ink); }
  /* スクロール停止は body に掛ける。html に overflow:hidden を掛けると body（overflow-x:hidden）が
     スクロール容器になり、スクロール後にメニューを開くとヘッダー（ロゴと×）が画面外へ消える */
  .nav-open body { overflow: hidden; }
}

/* --------------------------------------------------------------------------
   見出しの型（欧文の小さなラベル＋和文見出し）
   -------------------------------------------------------------------------- */
.sec { padding: 88px 0; }
.sec + .sec { border-top: 1px solid var(--line); }
.sec--white { background: var(--white); }

.sec-head { margin-bottom: 44px; }
.sec-head--center { text-align: center; }
.sec-label {
  display: block; font-family: var(--font-latin); font-size: 13px; letter-spacing: 0.3em;
  color: var(--gold); text-transform: uppercase; margin-bottom: 8px;
}
.sec-title { font-size: 24px; letter-spacing: 0.16em; }
.sec-head--rule .sec-title::after {
  content: ""; display: block; width: 40px; height: 1px; background: var(--gold); margin-top: 18px;
}
.sec-head--center.sec-head--rule .sec-title::after { margin-left: auto; margin-right: auto; }

.more-link {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-sans); font-size: 13.5px; letter-spacing: 0.12em; color: var(--green);
  border-bottom: 1px solid var(--line-strong); padding-bottom: 4px;
}
.more-link::after { content: "→"; font-family: var(--font-sans); transition: transform .3s ease; }
.more-link:hover::after { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   トップ：冒頭
   -------------------------------------------------------------------------- */
.hero { padding: 72px 0 96px; text-align: center; }
.hero-en {
  font-family: var(--font-latin); font-size: 15px; letter-spacing: 0.6em; color: var(--green);
  margin: 0 0 14px; padding-left: 0.6em;
}
.hero-logo {
  /* 社名の3字だけ「しっぽり明朝 B1」を読み込む（index.html の text= 指定） */
  font-family: 'Shippori Mincho B1', var(--font-serif);
  font-size: clamp(40px, 9vw, 64px); font-weight: 600; letter-spacing: 0.5em; padding-left: 0.5em;
  line-height: 1.3; margin: 0;
}
.hero-desc { font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.24em; color: var(--ink-muted); margin: 18px 0 0; }

.hero-book { margin: 64px auto 0; width: min(360px, 72vw); }
.hero-book a { display: block; }
.hero-book img { width: 100%; box-shadow: 0 24px 48px -28px rgba(20, 30, 28, .55); transition: transform .6s ease; }
.hero-book a:hover img { transform: translateY(-4px); }
.hero-book figcaption { margin-top: 26px; line-height: 1.7; }
.hero-book .cap-series { display: block; font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.2em; color: var(--green); }
.hero-book .cap-title { display: block; font-size: 19px; letter-spacing: 0.18em; margin-top: 4px; }
.hero-book .cap-date { display: block; font-family: var(--font-sans); font-size: 12.5px; letter-spacing: 0.12em; color: var(--ink-muted); margin-top: 4px; }

.hero-copy {
  margin: 64px 0 0; font-size: clamp(20px, 4.6vw, 26px); letter-spacing: 0.3em; padding-left: 0.3em; font-weight: 400;
}
.hero-copy::before {
  content: ""; display: block; width: 1px; height: 48px; background: var(--gold); margin: 0 auto 28px;
}

/* --------------------------------------------------------------------------
   書影グリッド（書影は作品として扱い、枠もボタンも重ねない）
   -------------------------------------------------------------------------- */
.book-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 56px 32px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 768px) { .book-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 72px 48px; } }
@media (min-width: 1024px) { .book-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.book-grid--pair { max-width: 720px; margin: 0 auto; }
@media (min-width: 768px) { .book-grid--pair { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 72px 96px; } }
@media (min-width: 1024px) { .book-grid--pair { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.book-card a { display: block; color: var(--ink); }
.book-card .cover { aspect-ratio: 864 / 1233; background: var(--paper-deep); overflow: hidden; }
.book-card .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.book-card a:hover .cover img { transform: scale(1.025); }
.book-card .meta { margin-top: 18px; line-height: 1.7; }
.book-card .label { display: inline-block; font-family: var(--font-sans); font-size: 11.5px; letter-spacing: 0.14em; color: var(--green); }
.book-card .label + .label::before { content: "／"; color: var(--line-strong); margin: 0 4px; }
.book-card .title { display: block; font-size: 17px; letter-spacing: 0.12em; margin-top: 6px; }
.book-card .sub { display: block; font-size: 12.5px; color: var(--ink-soft); letter-spacing: 0.06em; }
.book-card .author { display: block; font-family: var(--font-sans); font-size: 12px; color: var(--ink-soft); letter-spacing: 0.06em; margin-top: 8px; }
.book-card .date { display: block; font-family: var(--font-sans); font-size: 12px; color: var(--ink-muted); letter-spacing: 0.08em; }
.tag {
  display: inline-block; font-family: var(--font-sans); font-size: 11px; letter-spacing: 0.1em;
  color: var(--ink-soft); border: 1px solid var(--line-strong); padding: 1px 8px; margin-top: 10px;
}
.tag--forth { color: var(--green); border-color: var(--green); }

/* --------------------------------------------------------------------------
   叢書（墨・深緑の地を使う要所）
   -------------------------------------------------------------------------- */
.series-band {
  position: relative; color: var(--green-ink);
  background: var(--green-deep);
  overflow: hidden;
}
.series-band::before {
  content: ""; position: absolute; inset: 0;
  background: url("images/texture-bamboo.webp") repeat-x left center / auto 100%;
  opacity: .9;
}
.series-band::after {
  content: ""; position: absolute; inset: 0;
  background: rgba(15, 42, 39, .83);
}
@media (min-width: 768px) {
  .series-band::after {
    background: linear-gradient(90deg, rgba(15, 42, 39, .95) 0%, rgba(15, 42, 39, .82) 55%, rgba(15, 42, 39, .4) 100%);
  }
}
.series-band .wrap { position: relative; z-index: 1; }
.series-band a { color: var(--green-ink); }
.series-band .sec-label { color: var(--gold-soft); }
.series-band .more-link { color: var(--green-ink); border-color: rgba(233, 228, 214, .35); }

.series-inner { display: grid; gap: 40px; padding: 96px 0; }
.series-title { font-size: 26px; letter-spacing: 0.3em; }
.series-text p { max-width: 34em; color: rgba(233, 228, 214, .9); }
@media (min-width: 1024px) {
  .series-inner { grid-template-columns: auto 1fr; gap: 96px; align-items: start; padding: 120px 0; }
  .series-title { writing-mode: vertical-rl; font-size: 30px; letter-spacing: 0.5em; line-height: 1.2; }
  .series-title .sec-label { writing-mode: horizontal-tb; }
}

/* --------------------------------------------------------------------------
   お知らせ一覧
   -------------------------------------------------------------------------- */
.news-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.news-list li { border-bottom: 1px solid var(--line); }
.news-list a, .news-list .news-item {
  display: grid; grid-template-columns: 1fr; gap: 4px; padding: 22px 4px; color: var(--ink);
}
@media (min-width: 768px) {
  .news-list a, .news-list .news-item { grid-template-columns: 120px 150px 1fr; gap: 24px; align-items: baseline; }
}
.news-date { font-family: var(--font-latin); font-size: 15px; letter-spacing: 0.12em; color: var(--ink-muted); }
.news-cat { font-family: var(--font-sans); font-size: 11.5px; letter-spacing: 0.12em; color: var(--green); }
.news-title { font-size: 15.5px; letter-spacing: 0.06em; }
.news-list a:hover .news-title { color: var(--green); }

/* --------------------------------------------------------------------------
   下層ページ共通
   -------------------------------------------------------------------------- */
.page-head { padding: 64px 0 48px; }
.breadcrumb { list-style: none; margin: 0 0 32px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px; font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.08em; color: var(--ink-muted); }
.breadcrumb li + li::before { content: "›"; margin-right: 6px; color: var(--line-strong); }
.breadcrumb a:hover { color: var(--green); }
.page-title { font-size: clamp(24px, 5vw, 32px); letter-spacing: 0.18em; }
.page-lead { margin-top: 20px; max-width: var(--measure); color: var(--ink-soft); }

.prose { max-width: var(--measure); }
.prose h2 { font-size: 21px; letter-spacing: 0.14em; margin: 64px 0 22px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 17px; letter-spacing: 0.1em; margin: 40px 0 12px; }
.prose a { color: var(--green); border-bottom: 1px solid var(--line-strong); }
.prose a:hover { border-color: var(--green); }
.prose ul { padding-left: 1.4em; margin: 0 0 1.2em; }
.prose li { margin-bottom: .3em; }
.note { font-family: var(--font-sans); font-size: 13px; line-height: 1.9; color: var(--ink-muted); letter-spacing: 0.04em; }

.two-col { display: grid; gap: 48px; }
@media (min-width: 1024px) { .two-col { grid-template-columns: 220px 1fr; gap: 80px; } }
.side-title { font-size: 20px; letter-spacing: 0.2em; }
@media (min-width: 1024px) { .side-title { position: sticky; top: calc(var(--header-h) + 32px); } }

/* --------------------------------------------------------------------------
   書籍詳細
   -------------------------------------------------------------------------- */
.book-head { display: grid; gap: 48px; padding-bottom: 32px; }
@media (min-width: 900px) { .book-head { grid-template-columns: minmax(0, 400px) 1fr; gap: 80px; align-items: start; } }
.book-head .cover img { width: 100%; box-shadow: 0 24px 48px -28px rgba(20, 30, 28, .55); }
@media (max-width: 899px) { .book-head .cover { width: min(320px, 76vw); margin: 0 auto; } }
@media (min-width: 900px) { .book-head .cover { position: sticky; top: calc(var(--header-h) + 32px); } }

.book-series { font-family: var(--font-sans); font-size: 12.5px; letter-spacing: 0.22em; color: var(--green); margin: 0 0 12px; }
.book-title { font-size: clamp(30px, 7vw, 44px); letter-spacing: 0.22em; line-height: 1.35; }
.book-title .subtitle { display: block; font-size: clamp(15px, 3.6vw, 18px); letter-spacing: 0.12em; color: var(--ink-soft); margin-top: 14px; font-weight: 400; }
.book-authors { margin: 24px 0 0; font-size: 15.5px; letter-spacing: 0.1em; }
.book-authors span { white-space: nowrap; }
.book-authors span + span { margin-left: 1.2em; }
.book-catch { margin: 32px 0 0; padding: 22px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: 16.5px; line-height: 2; letter-spacing: 0.08em; }

.biblio { margin: 32px 0 0; display: grid; grid-template-columns: 6.5em 1fr; font-size: 14.5px; line-height: 1.8; }
.biblio dt, .biblio dd { padding: 10px 0; border-bottom: 1px solid var(--line); margin: 0; }
.biblio dt { font-family: var(--font-sans); font-size: 12.5px; letter-spacing: 0.14em; color: var(--ink-muted); padding-top: 12px; }
.biblio dd { letter-spacing: 0.06em; }
.biblio--legal { grid-template-columns: 10em 1fr; }
@media (max-width: 767px) {
  .biblio--legal { grid-template-columns: 1fr; }
  .biblio--legal dt { border-bottom: 0; padding-bottom: 0; }
}

.buy-box { margin-top: 32px; padding: 24px; background: var(--white); border: 1px solid var(--line); }
.buy-box-title { font-family: var(--font-sans); font-size: 12.5px; letter-spacing: 0.18em; color: var(--ink-muted); margin: 0 0 14px; }
.buy-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; list-style: none; margin: 0; padding: 0; }
.buy-links .btn { width: 100%; padding: 8px 6px; text-align: center; font-size: 13px; letter-spacing: 0.02em; line-height: 1.4; }
.buy-links .buy-direct .btn { font-size: 14px; letter-spacing: 0.12em; }
.buy-links .buy-direct { grid-column: 1 / -1; }
.store-list { list-style: none; margin: 0 0 1.2em; padding: 0; border-top: 1px solid var(--line); }
.store-list li { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 14px 4px; border-bottom: 1px solid var(--line); }
.store-list .store-name { letter-spacing: 0.08em; }
.store-list .store-kind { font-family: var(--font-sans); font-size: 12px; color: var(--ink-muted); letter-spacing: 0.08em; display: block; }
.store-list .store-link { font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.08em; white-space: nowrap; }
.prose .store-list { padding-left: 0; }
.prose .store-list li { margin-bottom: 0; }
.prose .store-list a { border-bottom: 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 0 22px;
  font-family: var(--font-sans); font-size: 14px; letter-spacing: 0.12em;
  border: 1px solid var(--green); color: var(--green); background: transparent;
  transition: background .3s ease, color .3s ease;
}
.btn:hover { background: var(--green); color: var(--white); }
.btn--solid { background: var(--green); color: var(--white); }
.btn--solid:hover { background: var(--green-deep); border-color: var(--green-deep); }
.btn[aria-disabled="true"] { border-color: var(--line-strong); color: var(--ink-muted); pointer-events: none; }
.prose a.btn { border: 1px solid var(--green); }
.prose a.btn--solid, .prose a.btn:hover { color: var(--white); }
.prose a.btn--solid:hover { border-color: var(--green-deep); }
.buy-box .note { margin: 14px 0 0; }
.buy-free-line { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 12px; margin: 0 0 14px; font-size: 14.5px; line-height: 1.7; color: var(--ink); }
.buy-free { display: inline-block; padding: 4px 12px; background: var(--green); color: var(--white); font-family: var(--font-sans); font-size: 13px; letter-spacing: 0.16em; line-height: 1.5; }
.buy-direct-btn { display: flex; width: 100%; min-height: 52px; font-size: 15px; letter-spacing: 0.14em; }
.buy-other { margin: 14px 0 0; padding-top: 12px; border-top: 1px solid var(--line); font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.04em; color: var(--ink-muted); }
.buy-other a { color: var(--ink-muted); text-decoration: underline; text-underline-offset: 3px; }
.prose .buy-free-line { margin: 0 0 1em; }

.feature { margin-bottom: 36px; }
.feature h3 { font-size: 17px; letter-spacing: 0.12em; margin: 0 0 10px; display: flex; gap: 14px; align-items: baseline; }
.feature h3::before { content: ""; flex: none; width: 18px; height: 1px; background: var(--gold); transform: translateY(-5px); }

.excerpt {
  margin: 0; padding: 32px 28px; background: var(--white); border-left: 2px solid var(--gold);
  font-size: 15.5px; line-height: 2.05;
}
.excerpt p:last-of-type { margin-bottom: 0; }
.excerpt cite { display: block; margin-top: 18px; font-style: normal; font-family: var(--font-sans); font-size: 12.5px; letter-spacing: 0.1em; color: var(--ink-muted); }

/* 目次 */
.toc { display: grid; gap: 0; border-top: 1px solid var(--line); }
@media (min-width: 900px) { .toc { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 56px; } }
.toc-vol { padding: 26px 0; border-bottom: 1px solid var(--line); }
.toc-vol h3 { font-size: 16px; letter-spacing: 0.12em; margin: 0 0 4px; }
.toc-vol h3 small { font-size: 13px; color: var(--ink-soft); letter-spacing: 0.08em; margin-left: .6em; font-weight: 400; }
.toc-vol p { font-size: 14px; line-height: 1.95; color: var(--ink-soft); margin: 8px 0 0; letter-spacing: 0.04em; }

.translator { display: grid; gap: 8px; padding: 32px; background: var(--white); border: 1px solid var(--line); }
.translator-name { font-size: 20px; letter-spacing: 0.24em; margin: 0; }
.translator-role { font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.16em; color: var(--green); margin: 0; }
.translator p { margin: 8px 0 0; font-size: 15px; }

/* 書籍一覧の横長行（新刊・近刊ページ） */
.book-rows { list-style: none; margin: 0; padding: 0; }
.book-row { display: grid; gap: 28px; padding: 48px 0; border-bottom: 1px solid var(--line); }
.book-row:first-child { padding-top: 0; }
@media (min-width: 768px) { .book-row { grid-template-columns: 220px 1fr; gap: 56px; } }
.book-row .cover { width: min(220px, 60vw); aspect-ratio: 864 / 1233; }
.book-row .cover img { width: 100%; height: 100%; object-fit: cover; }
.book-row h3 { font-size: 22px; letter-spacing: 0.18em; }
.book-row h3 small { display: block; font-size: 14px; color: var(--ink-soft); letter-spacing: 0.1em; margin-top: 6px; font-weight: 400; }
.book-row .row-meta { font-family: var(--font-sans); font-size: 13px; color: var(--ink-soft); letter-spacing: 0.06em; margin: 14px 0 18px; line-height: 1.9; }
.book-row p { max-width: var(--measure); }

/* 表（取引情報など） */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 1.6em; }
.data-table { width: 100%; min-width: 520px; border-collapse: collapse; font-size: 14px; line-height: 1.8; }
.data-table th, .data-table td { border-bottom: 1px solid var(--line); padding: 12px 10px; text-align: left; vertical-align: top; }
.data-table thead th { font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.12em; color: var(--ink-muted); font-weight: 500; border-bottom-color: var(--line-strong); }

/* 問い合わせ */
.contact-grid { display: grid; gap: 24px; margin: 8px 0 48px; }
@media (min-width: 768px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.contact-grid--single { grid-template-columns: 1fr; max-width: 640px; }
.contact-card { background: var(--white); border: 1px solid var(--line); padding: 32px 28px; display: flex; flex-direction: column; gap: 14px; }
.contact-card h2 { font-size: 18px; letter-spacing: 0.16em; margin: 0; padding: 0; border: 0; }
.contact-card p { font-size: 14.5px; margin: 0; flex: 1; }

/* --------------------------------------------------------------------------
   フッター（墨色の地）
   -------------------------------------------------------------------------- */
.site-footer { background: var(--ink); color: rgba(240, 236, 226, .82); padding: 72px 0 32px; font-family: var(--font-sans); font-size: 13px; }
.site-footer a { color: rgba(240, 236, 226, .82); }
.site-footer a:hover { color: var(--gold-soft); }
.footer-top { display: grid; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(240, 236, 226, .14); }
@media (min-width: 900px) { .footer-top { grid-template-columns: 1fr 2fr; gap: 64px; } }
.footer-brand .brand { color: #f0ece2; }
.footer-brand .brand-logo { height: 44px; }
.footer-brand .brand-en { color: var(--gold-soft); }
.footer-brand p { margin: 20px 0 0; line-height: 1.9; letter-spacing: 0.06em; color: rgba(240, 236, 226, .66); }
.footer-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
@media (min-width: 768px) { .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.footer-nav h2 { font-family: var(--font-latin); font-size: 12px; letter-spacing: 0.3em; color: var(--gold-soft); font-weight: 500; margin: 0 0 12px; text-transform: uppercase; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; letter-spacing: 0.08em; }
.copyright { margin: 28px 0 0; font-family: var(--font-latin); font-size: 13px; letter-spacing: 0.16em; color: rgba(240, 236, 226, .5); }

/* --------------------------------------------------------------------------
   フェードイン（threshold は script.js 側で 0 のまま運用すること）
   -------------------------------------------------------------------------- */
.js .fade { opacity: 0; transform: translateY(16px); transition: opacity .9s ease, transform .9s ease; }
.js .fade.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .fade { opacity: 1; transform: none; transition: none; }
  * { scroll-behavior: auto !important; }
}

/* --------------------------------------------------------------------------
   スマホ微調整
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  :root { --gutter: 16px; --header-h: 66px; }
  body { font-size: 15.5px; line-height: 1.9; }
  .sec { padding: 64px 0; }
  .hero { padding: 48px 0 72px; }
  .hero-en { font-size: 13px; letter-spacing: 0.4em; padding-left: 0.4em; }
  .hero-book { margin-top: 44px; }
  .hero-copy { margin-top: 48px; }
  .brand-ja { font-size: 17px; }
  .brand-logo { height: 30px; }
  .site-header .brand-en { font-size: 10px; letter-spacing: 0.24em; }
  .site-header .brand-logo--header { height: 46px; }
  .book-grid { gap: 44px 20px; }
  .book-card .title { font-size: 15.5px; }
  .excerpt { padding: 24px 18px; }
  .translator { padding: 24px 20px; }
  .buy-box { padding: 20px 16px; }
}