/* =========================================================================
   柱谷ふとん店 ｜ C案 共通サイトCSS（下層ページ共通の"型"）
   site.css — 標準ヘッダー（ナビ6項目＋CTA2本固定）／フッター3カラム／
              ボタン・パンくず・ボトムCTA・reveal などの共通シャーシ。
   ページ固有レイアウトは各 page.css、UI部品は catalog.css（c-*）を併用。
   トーン: エンジ#C0392B × 墨#1A1A1A × 和紙白#F5F5F0 / 明朝見出し
   ========================================================================= */

:root{
  /* C案カラートークン（catalog.css と top.css の和集合） */
  --primary:#C0392B;
  --primary-dark:#922B21;
  --primary-tint:#E08A82;
  --primary-rgb:192,57,43;
  --dark:#1A1A1A;
  --surface-dark:#1A1A1A;
  --mid:#2D2D2D;
  --surface-mid:#2D2D2D;
  --light:#F5F5F0;
  --surface-light:#F5F5F0;
  --white:#FFFFFF;
  --text:#333333;
  --text-base:#333333;
  --muted:#666666;
  --text-muted:#666666;
  --rule:#E5E5E0;
  --rule-line:#E5E5E0;
  --error:#B3261E;
  --overlay-dark:rgba(26,26,26,.55);
  --overlay-light:rgba(255,255,255,.86);
  --serif:'Noto Serif JP', serif;
  --sans:'Noto Sans JP', sans-serif;
  --ease:cubic-bezier(0.22,1,0.36,1);
  --ease-emph:cubic-bezier(0.16,1,0.3,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--text);background:var(--light);line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.container{max-width:1100px;margin:0 auto;padding:0 24px}
.wide{max-width:1320px;margin:0 auto;padding:0 24px}
.narrow{max-width:880px;margin:0 auto;padding:0 24px}
section{position:relative}

/* 下層ページ：固定ヘッダー分の余白 */
main.page{padding-top:72px}

/* ===== Buttons（スイープ） ===== */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;font-weight:600;font-size:14px;letter-spacing:.04em;border-radius:2px;cursor:pointer;border:0;font-family:var(--sans);position:relative;overflow:hidden;transition:color .3s var(--ease);text-align:center}
.btn span.label{position:relative;z-index:2}
.btn span.arrow{position:relative;z-index:2;transition:transform .3s var(--ease)}
.btn:hover span.arrow{transform:translateX(5px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary::before{content:'';position:absolute;inset:0;background:var(--primary-dark);transform:translateX(-101%);transition:transform .4s var(--ease-emph);z-index:1}
.btn-primary:hover::before{transform:translateX(0)}
.btn-secondary{background:transparent;color:var(--primary);border:1px solid var(--primary)}
.btn-secondary::before{content:'';position:absolute;inset:0;background:var(--primary);transform:translateX(-101%);transition:transform .4s var(--ease-emph);z-index:1}
.btn-secondary:hover{color:#fff}
.btn-secondary:hover::before{transform:translateX(0)}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.btn-link{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-weight:600;font-size:14px;border-bottom:1px solid currentColor;padding-bottom:2px;transition:color .25s var(--ease)}
.btn-link::after{content:'→';transition:transform .25s var(--ease)}
.btn-link:hover{color:var(--primary-dark)}
.btn-link:hover::after{transform:translateX(4px)}

/* ===== セクションタイトル ===== */
.eyebrow{font-size:11px;letter-spacing:.28em;font-weight:600;color:var(--accent);font-family:var(--sans);display:inline-block}
.section-title{font-family:var(--serif);font-weight:700;font-size:36px;letter-spacing:.06em;line-height:1.4;margin-top:14px;color:var(--dark);position:relative;padding-bottom:24px;display:block}
.section-title .accent{color:var(--primary)}
.section-title::after{content:'';position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--primary);transition:width .9s var(--ease-emph) .15s}
.reveal.in .section-title::after,.section-title.in::after{width:64px}
.section-head{margin-bottom:52px}
.section-head.center{text-align:center}
.section-head.center .section-title::after{left:50%;transform:translateX(-50%)}
.lead-intro{font-size:15px;color:var(--muted);line-height:1.95;max-width:660px;margin-top:18px}

/* ===== 標準ヘッダー（ナビ6項目＋右端CTA2本固定） ===== */
header.nav{position:fixed;top:0;left:0;right:0;z-index:200;background:var(--white);height:72px;display:flex;align-items:center;transition:background .3s var(--ease),height .3s var(--ease),border-color .3s var(--ease);border-bottom:1px solid transparent}
header.nav.scrolled{background:var(--overlay-light);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);height:60px;border-bottom-color:var(--rule)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:1320px;margin:0 auto;padding:0 24px;gap:20px}
.nav-logo{flex:none}
.nav-logo img{height:36px;width:auto;transition:height .3s var(--ease)}
header.nav.scrolled .nav-logo img{height:30px}
.nav-links{display:flex;gap:20px;font-size:13.5px;font-weight:500}
.nav-links a{padding:6px 0;color:var(--text);position:relative;white-space:nowrap}
.nav-links a::after{content:'';position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--primary);transition:width .3s var(--ease)}
.nav-links a:hover::after,.nav-links a[aria-current="page"]::after{width:100%}
.nav-links a[aria-current="page"]{color:var(--primary);font-weight:700}
.nav-cta{display:flex;gap:8px}
.nav-cta .btn{padding:10px 15px;font-size:12.5px;white-space:nowrap}
.nav-burger{display:none;width:42px;height:42px;border:1px solid var(--rule);background:#fff;border-radius:2px;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-burger span{width:20px;height:1.5px;background:var(--dark);display:block;transition:transform .3s var(--ease),opacity .2s var(--ease)}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* モバイルメニュー */
.nav-mobile{position:fixed;top:72px;left:0;right:0;z-index:190;background:var(--white);border-bottom:1px solid var(--rule);box-shadow:0 22px 40px rgba(26,26,26,.1);transform:translateY(-12px);opacity:0;pointer-events:none;transition:transform .35s var(--ease-emph),opacity .3s var(--ease);max-height:calc(100vh - 72px);overflow-y:auto}
.nav-mobile.open{transform:none;opacity:1;pointer-events:auto}
.nav-mobile a.m-link{display:flex;align-items:center;justify-content:space-between;padding:17px 26px;border-top:1px solid var(--rule);font-size:15px;font-weight:600;color:var(--dark);font-family:var(--serif);letter-spacing:.04em}
.nav-mobile a.m-link:first-child{border-top:0}
.nav-mobile a.m-link::after{content:'→';color:var(--primary)}
.nav-mobile a.m-link[aria-current="page"]{color:var(--primary)}
.nav-mobile .m-cta{display:flex;flex-direction:column;gap:10px;padding:20px 26px 26px;background:var(--light)}
.nav-mobile .m-cta .btn{justify-content:center}

/* ===== パンくず ===== */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);padding:22px 0 0}
.crumbs a{color:var(--muted);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:#bbb}
.crumbs [aria-current="page"]{color:var(--dark);font-weight:600}

/* ===== 下層ページ・ヒーロー（標準型） ===== */
.page-hero{background:var(--white);padding:54px 0 64px;border-bottom:1px solid var(--rule);position:relative}
.page-hero .inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.page-hero .eyebrow{color:var(--accent);border-top:1px solid var(--accent);padding-top:12px}
.page-hero h1{font-family:var(--serif);font-size:46px;font-weight:700;letter-spacing:.06em;line-height:1.35;color:var(--dark);margin:18px 0 22px}
.page-hero h1 .accent{color:var(--primary)}
.page-hero .lead{font-size:15px;line-height:2.05;color:var(--text);max-width:560px}
.page-hero .media{aspect-ratio:4/3;overflow:hidden;border-radius:2px}
.page-hero .media img{width:100%;height:100%;object-fit:cover}
.page-hero.solo{text-align:center}
.page-hero.solo .inner{display:block;max-width:820px;margin:0 auto}
.page-hero.solo .eyebrow{border-top:0;padding-top:0}
.page-hero.solo .lead{margin:0 auto}

/* ===== ボトムCTA（イベント＋ショールーム／墨地・全ページ共通） ===== */
.cta{background:var(--dark);color:#fff;padding:104px 0;text-align:center;position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;left:50%;top:0;transform:translateX(-50%);width:96px;height:1px;background:var(--primary)}
.cta .eyebrow{color:var(--accent-tint)}
.cta h2{font-family:var(--serif);font-size:38px;letter-spacing:.06em;line-height:1.4;margin:14px 0 18px}
.cta h2 .accent{color:var(--primary)}
.cta p{color:#bbb;font-size:14px;margin-bottom:36px;max-width:580px;margin-left:auto;margin-right:auto}
.cta-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:24px}
.cta-row .btn-secondary{color:#fff;border-color:rgba(255,255,255,.6)}
.cta-row .btn-secondary::before{background:#fff}
.cta-row .btn-secondary:hover{color:var(--dark)}
.cta .small{font-size:13px;color:#999}
.cta .small a{text-decoration:underline;color:#ddd}

/* ===== フッター（墨地・3カラム＋会社情報） ===== */
footer.site-foot{background:#0e0e0e;color:#bbb;padding:72px 0 32px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;margin-bottom:56px}
.foot-brand img{height:42px;margin-bottom:18px}
.foot-brand .addr{font-size:12.5px;line-height:1.95;color:#999}
.foot-col h4{font-family:var(--serif);font-size:13px;color:#fff;margin-bottom:18px;letter-spacing:.18em}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:10px;font-size:13px}
.foot-col a{transition:color .2s var(--ease)}
.foot-col a:hover{color:var(--accent-tint)}
.foot-bot{border-top:1px solid #222;padding-top:24px;display:flex;justify-content:space-between;font-size:11.5px;color:#666;letter-spacing:.04em;flex-wrap:wrap;gap:10px}

/* ===== 関連リンク（あわせて読みたい／気になる方は） ===== */
.links{padding:104px 0;background:var(--light)}
.links-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:48px}
.link-card{background:#fff;border:1px solid var(--rule);padding:28px 26px 30px;display:flex;flex-direction:column;gap:8px;transition:transform .4s var(--ease),border-color .3s,box-shadow .4s var(--ease);position:relative;overflow:hidden}
.link-card::before{content:'';position:absolute;left:26px;top:0;height:1px;width:0;background:var(--primary);transition:width .5s var(--ease)}
.link-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:0 14px 32px rgba(26,26,26,.07)}
.link-card:hover::before{width:44px}
.link-card .k{font-size:10px;letter-spacing:.24em;color:var(--accent);font-weight:600}
.link-card h4{font-family:var(--serif);font-size:18px;font-weight:700;color:var(--dark);letter-spacing:.04em;line-height:1.5}
.link-card p{font-size:12.5px;color:var(--muted);line-height:1.8;flex:1}
.link-card .arr{color:var(--primary);font-weight:700;align-self:flex-end;transition:transform .3s var(--ease)}
.link-card:hover .arr{transform:translateX(5px)}

/* ===== reveal ===== */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .7s var(--ease-emph),transform .7s var(--ease-emph)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.08s}
.reveal[data-d="2"]{transition-delay:.16s}
.reveal[data-d="3"]{transition-delay:.24s}

/* ===== レスポンシブ ===== */
@media (max-width:1240px){
  .nav-links{gap:15px;font-size:12.5px}
  .nav-cta .btn{padding:9px 12px;font-size:11.5px}
}
@media (max-width:1140px){
  .nav-links,.nav-cta{display:none}
  .nav-burger{display:flex}
}
@media (max-width:1040px){
  .page-hero .inner{grid-template-columns:1fr;gap:36px}
  .page-hero h1{font-size:34px}
  .links-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section-title{font-size:29px}
}
@media (max-width:560px){
  .links-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:28px}
  .cta h2{font-size:28px}
}

/* ===== reduced-motion ===== */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}
.page-hero .media picture{display:block;width:100%;height:100%}