/* BOOK:// 公開サイト共有CSS — 現代的な出版デザイン×上質なAIサービス。静かなエディトリアル。 */
:root {
  --ink: #1c1a16; --ink-2: #4c463c; --ink-3: #8a8272;
  --paper: #f7f4ee; --paper-2: #fffdf9; --line: #e3ddd0;
  --gold: #a8862f; --gold-2: #c9a84c; --moss: #55603f; --alert: #a0421f;
  --serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --latin: "Cormorant Garamond", Georgia, serif;
  --sans: "Inter", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --maxw: 1080px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); color: var(--ink); background: var(--paper-2); font-size: 15.5px; line-height: 1.95; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; letter-spacing: .03em; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; height: auto; display: block; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.serif { font-family: var(--serif); }
.latin { font-family: var(--latin); }

/* ヘッダー */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,253,249,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; gap: 28px; height: 64px; }
.logo { font-family: var(--latin); font-size: 26px; font-weight: 600; letter-spacing: .04em; }
.logo .slash { color: var(--gold); }
.logo small { display: block; font-family: var(--sans); font-size: 9px; letter-spacing: .4em; color: var(--ink-3); margin-top: -6px; }
.gnav { display: flex; gap: 22px; margin-left: auto; font-size: 13.5px; color: var(--ink-2); align-items: center; }
.gnav a:hover { color: var(--gold); }
.gnav .nav-cta { border: 1px solid var(--ink); background: var(--ink); color: var(--paper-2); border-radius: 4px; padding: 7px 16px; letter-spacing: .05em; }
.gnav .nav-cta:hover { opacity: .82; color: var(--paper-2); }
.lang-switch { font-size: 12px; color: var(--ink-3); border: 1px solid var(--line); border-radius: 20px; padding: 3px 12px; }
.lang-switch:hover { border-color: var(--gold); color: var(--gold); }
.nav-toggle { display: none; }

/* ヒーロー */
.hero { padding: 92px 0 70px; background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%); border-bottom: 1px solid var(--line); overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.kicker { font-size: 12px; letter-spacing: .34em; color: var(--gold); margin-bottom: 18px; font-weight: 500; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); margin-bottom: 22px; }
.hero .lead { color: var(--ink-2); font-size: 16px; margin-bottom: 30px; max-width: 34em; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn { display: inline-block; border: 1px solid var(--ink); background: var(--ink); color: var(--paper-2); border-radius: 4px; padding: 13px 30px; font-size: 15px; letter-spacing: .06em; transition: opacity .15s; }
.btn:hover { opacity: .82; }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--paper); opacity: 1; }
.btn-gold { background: var(--gold); border-color: var(--gold); }
.trust-line { margin-top: 26px; font-size: 12.5px; color: var(--ink-3); border-top: 1px solid var(--line); padding-top: 14px; }
.trust-line b { color: var(--ink-2); font-weight: 600; }

/* セクション */
.section { padding: 76px 0; }
.section-alt { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { margin-bottom: 40px; max-width: 640px; }
.sec-head .kicker { margin-bottom: 12px; }
.sec-head h2 { font-size: clamp(24px, 3.4vw, 34px); margin-bottom: 14px; }
.sec-head p { color: var(--ink-2); }
.center { text-align: center; }
.center .sec-head { margin-left: auto; margin-right: auto; }

/* 本のモックアップ (CSSで本を見せる。人物写真は使わない) */
.book { --bw: 180px; width: var(--bw); flex: none; }
.book .jacket { position: relative; width: var(--bw); height: calc(var(--bw) * 1.44); border-radius: 2px 6px 6px 2px; box-shadow: -6px 8px 20px rgba(28,26,22,.22), inset 6px 0 8px -6px rgba(0,0,0,.4); padding: 14px; display: flex; flex-direction: column; overflow: hidden; transition: transform .25s; }
.book:hover .jacket { transform: translateY(-5px) rotate(-.6deg); }
.book .jacket::before { content: ""; position: absolute; left: 9px; top: 0; bottom: 0; width: 1px; background: rgba(0,0,0,.16); }
.book .b-title { font-family: var(--serif); font-weight: 600; line-height: 1.5; }
.book .b-sub { font-size: 9px; opacity: .75; margin-top: 6px; }
.book .b-author { margin-top: auto; font-size: 9px; letter-spacing: .1em; opacity: .8; }
.book .b-label { font-size: 8px; letter-spacing: .22em; opacity: .6; margin-bottom: 8px; }
.book figcaption { font-size: 12px; color: var(--ink-3); margin-top: 12px; line-height: 1.6; }
.bookshelf { display: flex; gap: 26px; flex-wrap: wrap; justify-content: center; align-items: flex-end; }

/* ジャンルカード */
.genre-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.genre-card { border: 1px solid var(--line); background: var(--paper-2); border-radius: 6px; padding: 18px 16px; transition: border-color .15s, box-shadow .15s; }
.genre-card:hover { border-color: var(--gold); box-shadow: 0 4px 14px rgba(28,26,22,.07); }
.genre-card b { font-family: var(--serif); display: block; font-size: 15px; margin-bottom: 4px; }
.genre-card span { font-size: 11.5px; color: var(--ink-3); line-height: 1.5; display: block; }

/* ステップ */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.step { background: var(--paper-2); border: 1px solid var(--line); border-radius: 6px; padding: 26px 24px; position: relative; }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); font-family: var(--latin); font-size: 34px; color: var(--gold-2); display: block; margin-bottom: 8px; }
.step h3 { font-size: 16.5px; margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--ink-2); }

/* 料金 */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; align-items: stretch; }
.price-card { background: var(--paper-2); border: 1px solid var(--line); border-radius: 8px; padding: 30px 26px; display: flex; flex-direction: column; }
.price-card.featured { border-color: var(--gold); box-shadow: 0 6px 24px rgba(168,134,47,.14); }
.price-card .p-name { font-family: var(--latin); font-size: 19px; letter-spacing: .05em; }
.price-card .p-desc { font-size: 12.5px; color: var(--ink-3); margin: 4px 0 16px; }
.price-card .p-amount { font-family: var(--serif); font-size: 30px; font-weight: 600; }
.price-card .p-amount small { font-size: 12px; color: var(--ink-3); font-weight: 400; }
.price-card ul { list-style: none; margin: 18px 0 22px; font-size: 13px; color: var(--ink-2); flex: 1; }
.price-card li { padding: 5px 0 5px 20px; position: relative; border-bottom: 1px dashed var(--line); }
.price-card li::before { content: "—"; position: absolute; left: 0; color: var(--gold); }
.price-card li.off { color: var(--ink-3); opacity: .6; }
.price-card li.off::before { content: "×"; color: var(--ink-3); }

/* 2カード (JAPAN TO GLOBAL / GLOBAL TO JAPAN) */
.cross-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.cross-card { border: 1px solid var(--line); border-radius: 8px; padding: 34px 30px; background: var(--paper-2); }
.cross-card .kicker { margin-bottom: 10px; }
.cross-card h3 { font-family: var(--latin); font-size: 24px; letter-spacing: .04em; margin-bottom: 10px; }
.cross-card p { font-size: 14px; color: var(--ink-2); margin-bottom: 16px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; }
.tag { font-size: 11.5px; border: 1px solid var(--line); border-radius: 20px; padding: 2px 12px; color: var(--ink-2); background: var(--paper); }

/* FAQ */
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq summary { cursor: pointer; font-family: var(--serif); font-size: 15.5px; font-weight: 600; padding: 14px 30px 14px 0; position: relative; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; color: var(--gold); font-family: var(--latin); font-size: 20px; }
.faq details[open] summary::after { content: "–"; }
.faq .faq-a { padding: 0 0 18px; color: var(--ink-2); font-size: 14px; max-width: 46em; }

/* 引用・実績 */
.founder-quote { border-left: 2px solid var(--gold); padding: 6px 0 6px 26px; color: var(--ink-2); font-size: 14.5px; max-width: 42em; }
.founder-figure { font-size: 12.5px; color: var(--ink-3); margin-top: 14px; }

/* フッター */
.site-footer { background: #26231e; color: #b9b2a4; padding: 56px 0 40px; font-size: 13px; margin-top: 0; }
.site-footer a:hover { color: var(--gold-2); }
.foot-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 30px; margin-bottom: 34px; }
.foot-grid h4 { color: #ddd6c8; font-size: 12.5px; letter-spacing: .12em; margin-bottom: 12px; font-family: var(--sans); font-weight: 600; }
.foot-grid ul { list-style: none; }
.foot-grid li { margin-bottom: 7px; }
.foot-logo { font-family: var(--latin); font-size: 24px; color: #f0e9da; }
.foot-note { border-top: 1px solid #3a362e; padding-top: 22px; font-size: 11.5px; line-height: 1.9; color: #948c7c; }

/* 汎用 */
.notice { background: var(--paper); border: 1px solid var(--line); border-left: 3px solid var(--gold); border-radius: 4px; padding: 16px 20px; font-size: 13.5px; color: var(--ink-2); }
.prose { max-width: 46em; }
.prose h2 { font-size: 21px; margin: 40px 0 14px; }
.prose h3 { font-size: 16.5px; margin: 28px 0 10px; }
.prose p, .prose ul, .prose ol { margin-bottom: 14px; color: var(--ink-2); }
.prose ul, .prose ol { padding-left: 1.4em; }
.legal-date { font-size: 12.5px; color: var(--ink-3); margin-bottom: 30px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

@media (max-width: 860px) {
  .hero .wrap, .cross-grid, .grid-2 { grid-template-columns: 1fr; }
  .steps, .grid-3 { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .gnav { display: none; }
  .gnav.open { display: flex; position: absolute; top: 64px; left: 0; right: 0; background: var(--paper-2); flex-direction: column; padding: 18px 24px; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: block; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 4px; padding: 6px 12px; font-size: 12px; color: var(--ink-2); }
  .hero { padding: 56px 0 46px; }
  .section { padding: 54px 0; }
}