/* =========================================================
   RUSHAH — 共通コアスタイル（Header/Section/汎用UI）
   ========================================================= */

/* ---------- Version Switcher ---------- */
.vswitch{
  position:fixed;top:22px;left:50%;transform:translateX(-50%);z-index:2000;
  display:flex;gap:0;padding:5px;border-radius:999px;
  background:rgba(6,15,29,.55);backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 20px 50px -20px rgba(0,0,0,.5);
}
.vswitch button{
  appearance:none;background:transparent;border:0;cursor:pointer;
  color:rgba(255,255,255,.75);
  font-family:var(--font-en);font-size:11px;font-weight:600;letter-spacing:.28em;text-transform:uppercase;
  padding:9px 20px 9px;border-radius:999px;
  transition:color .35s ease,background .35s ease;
}
.vswitch button small{display:block;font-family:var(--font-jp);font-size:9px;letter-spacing:.2em;opacity:.6;margin-top:1px;font-weight:500}
.vswitch button.on{background:linear-gradient(135deg,var(--gold-2),var(--gold));color:#0b1a2e;box-shadow:inset 0 0 0 1px rgba(255,255,255,.2),0 6px 18px -6px rgba(185,134,63,.6)}
.vswitch button.on small{opacity:.75}
.vswitch button:not(.on):hover{color:#fff}

/* ヘッダーとの干渉回避:スクロール時に上部にfixed */
body.mode-cine .vswitch{background:rgba(6,15,29,.75)}

/* ---------- Section base ---------- */
section, .section-wrap{position:relative}
.sec-label{
  display:inline-flex;align-items:center;gap:14px;
  font-family:var(--font-en);font-size:11px;font-weight:600;letter-spacing:.42em;text-indent:.42em;
  color:var(--gold);text-transform:uppercase;
  margin-bottom:22px;
}
.sec-label::before{
  content:"";width:34px;height:1px;background:currentColor;opacity:.7;
}
section.dark .sec-label{color:var(--gold-2)}

.sec-head{max-width:820px;margin:0 auto 74px;text-align:center}
.sec-head h2{
  font-family:var(--font-jp-serif);font-weight:600;
  font-size:clamp(28px,4.4vw,46px);line-height:1.5;letter-spacing:.04em;
  margin:0 0 22px;color:var(--ink);
}
.sec-head p{color:var(--ink-2);margin:0;font-size:15px;line-height:2.15}
section.dark .sec-head h2{color:#fff}
section.dark .sec-head p{color:rgba(255,255,255,.75)}

.sec{padding:140px 0}
@media (max-width:720px){.sec{padding:96px 0}}

.soft{background:var(--paper)}
.dark{background:var(--navy-deep);color:#fff}
.dark-abyss{background:var(--navy-abyss);color:#fff}

/* ---------- Site Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:88px;display:flex;align-items:center;color:#fff;
  transition:height .45s var(--ease),background .45s var(--ease),box-shadow .45s var(--ease),color .45s var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:rgba(255,255,255,.14);opacity:1;transition:opacity .4s;
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:1360px}
.site-header.is-scrolled{
  height:66px;background:rgba(255,255,255,.9);
  -webkit-backdrop-filter:saturate(160%) blur(18px);backdrop-filter:saturate(160%) blur(18px);
  color:var(--navy);box-shadow:0 14px 40px -26px rgba(6,15,29,.35);
}
.site-header.is-scrolled::after{opacity:0}

.brand{display:flex;align-items:center;gap:14px;color:currentColor;text-decoration:none}
.brand .logo-mark{
  position:relative;flex:none;
  height:52px;width:auto;
  display:flex;align-items:center;justify-content:center;
  padding:6px 10px;
  border-radius:6px;
  background:rgba(255,255,255,.95);
  transition:height .45s var(--ease),background .45s var(--ease),padding .45s var(--ease),box-shadow .45s var(--ease);
  box-shadow:0 4px 14px -6px rgba(0,0,0,.35);
}
.brand .logo-mark .logo-img{
  height:100%;width:auto;display:block;
}
/* スクロール後: 背景を透明にしてロゴ本来のネイビーが浮かぶ */
.site-header.is-scrolled .brand .logo-mark{
  height:40px;
  background:transparent;
  padding:0;
  box-shadow:none;
}

/* 隣に並ぶ会社名(株式会社 RUSHAH) */
.brand-name{
  display:flex;flex-direction:column;gap:1px;line-height:1;color:currentColor;
}
.brand-name .bn-jp{
  font-family:var(--font-jp-serif);font-weight:500;font-size:10.5px;letter-spacing:.32em;
  opacity:.85;
}
.brand-name .bn-en{
  font-family:var(--font-en-serif);font-weight:400;font-size:20px;letter-spacing:.18em;
  margin-top:3px;
}

/* フッター: 暗背景用に、フルロゴを白ボックス内に上品に置く */
.site-footer .brand .logo-mark{
  height:96px;
  background:transparent;
  padding:0;
  box-shadow:none;
}
.site-footer .brand .logo-img{
  filter:brightness(0) invert(1);  /* PNG の透明部分は保持されるので、白いRHは白のまま、濃紺は白に反転 */
}
/* 上記のフィルタだと、内部の白RHが逆に透明化するので使えない → 別の方法 */
.site-footer .brand .logo-img{filter:none}
.site-footer .brand .logo-mark{
  background:rgba(255,255,255,.95);
  padding:10px 16px;
  border-radius:8px;
  box-shadow:0 4px 20px -8px rgba(0,0,0,.4);
}
.site-footer .brand .brand-name{display:none}

.gnav{display:flex;align-items:center;gap:36px}
.gnav .gl{position:relative;font-size:13px;font-weight:600;letter-spacing:.11em;color:currentColor;padding:6px 0}
.gnav .gl small{display:block;font-family:var(--font-en);font-size:8.5px;font-weight:600;letter-spacing:.34em;opacity:.55;line-height:1.5;margin-top:1px}
.gnav .gl::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .5s var(--ease-cine)}
.gnav .gl:hover::after{transform:scaleX(1);transform-origin:left}

.nav-cta{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;border-radius:999px;font-size:13px;font-weight:700;letter-spacing:.08em;transition:all .4s var(--ease)}
.nav-cta .arw{font-family:var(--font-en);transition:transform .4s var(--ease)}
.nav-cta:hover .arw{transform:translateX(4px)}
.nav-cta.outline{border:1px solid rgba(255,255,255,.55);color:#fff}
.nav-cta.outline:hover{background:rgba(255,255,255,.12);border-color:#fff}
.site-header.is-scrolled .nav-cta.outline{border-color:rgba(15,39,68,.3);color:var(--navy)}
.site-header.is-scrolled .nav-cta.outline:hover{background:rgba(15,39,68,.06)}
.nav-cta.fill{background:#fff;color:var(--navy)}
.nav-cta.fill:hover{background:var(--gold-2);color:var(--navy-deep)}
.site-header.is-scrolled .nav-cta.fill{background:var(--navy);color:#fff}
.site-header.is-scrolled .nav-cta.fill:hover{background:var(--gold);color:#fff}

/* Cinematic mode header — 上部にトップバー */
.top-bar{
  display:none;position:fixed;top:0;left:0;right:0;z-index:1001;
  height:34px;align-items:center;justify-content:space-between;
  padding:0 32px;font-family:var(--font-en);font-size:10.5px;letter-spacing:.36em;
  color:rgba(255,255,255,.65);pointer-events:none;
  transition:opacity .4s ease,color .4s ease;
}
.top-bar span{display:inline-flex;gap:20px;align-items:center}
.top-bar span i{width:3px;height:3px;background:currentColor;border-radius:50%;font-style:normal;opacity:.5}
body.mode-cine .top-bar{display:flex}
body.mode-cine .site-header{top:34px}
body.mode-cine.scrolled-mid .top-bar{opacity:0}

/* ---------- 汎用ボタン ---------- */
.btn-circle{display:inline-flex;align-items:center;gap:20px;color:#fff;font-weight:700}
.btn-circle .bc-label{font-family:var(--font-jp-serif);font-size:15.5px;letter-spacing:.16em;font-weight:600}
.btn-circle .bc-label small{display:block;font-family:var(--font-en);font-size:9px;font-weight:600;letter-spacing:.36em;opacity:.6;line-height:1.5;text-align:left;margin-top:3px}
.btn-circle .bc-icon{
  position:relative;flex:none;width:66px;height:66px;border-radius:50%;
  border:1px solid rgba(255,255,255,.55);display:flex;align-items:center;justify-content:center;
  overflow:hidden;transition:border-color .4s var(--ease);
}
.btn-circle .bc-icon::before{
  content:"";position:absolute;inset:0;border-radius:50%;background:#fff;
  transform:scale(0);transition:transform .55s var(--ease-cine);
}
.btn-circle .bc-icon svg{position:relative;z-index:1;width:22px;height:22px;stroke:#fff;transition:stroke .35s,transform .55s var(--ease-cine)}
.btn-circle:hover .bc-icon{border-color:#fff}
.btn-circle:hover .bc-icon::before{transform:scale(1)}
.btn-circle:hover .bc-icon svg{stroke:var(--navy);transform:translateX(4px)}
.btn-circle.dark{color:var(--navy)}
.btn-circle.dark .bc-icon{border-color:rgba(15,39,68,.4)}
.btn-circle.dark .bc-icon::before{background:var(--navy)}
.btn-circle.dark .bc-icon svg{stroke:var(--navy)}
.btn-circle.dark:hover .bc-icon{border-color:var(--navy)}
.btn-circle.dark:hover .bc-icon svg{stroke:#fff}

.btn-ghost{
  position:relative;color:rgba(255,255,255,.85);font-family:var(--font-jp-serif);font-size:14.5px;font-weight:600;letter-spacing:.18em;padding:10px 2px;
}
.btn-ghost::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:1px;background:rgba(255,255,255,.5);transition:background .3s,transform .45s var(--ease)}
.btn-ghost:hover{color:#fff}
.btn-ghost:hover::after{background:var(--gold-2)}

.tlink{position:relative;display:inline-flex;align-items:center;gap:12px;font-family:var(--font-en);font-size:12px;font-weight:700;letter-spacing:.28em;text-transform:uppercase;color:var(--navy)}
.tlink .arw{font-family:var(--font-en);font-size:14px;transition:transform .4s var(--ease)}
.tlink::after{content:"";position:absolute;left:0;bottom:-8px;width:100%;height:1px;background:rgba(15,39,68,.3);transition:background .3s}
.tlink:hover .arw{transform:translateX(8px)}
.tlink:hover::after{background:var(--gold)}
section.dark .tlink{color:#fff}
section.dark .tlink::after{background:rgba(255,255,255,.35)}

/* ---------- Marquee ---------- */
.marquee{overflow:hidden;background:var(--navy-deep);color:#fff;padding:20px 0;border-top:1px solid var(--hair-dark);border-bottom:1px solid var(--hair-dark)}
.marquee-track{display:flex;gap:2em;white-space:nowrap;animation:marqueeMove 42s linear infinite;font-family:var(--font-en);font-size:12px;letter-spacing:.42em;text-transform:uppercase;color:rgba(255,255,255,.7)}
.marquee-track span{display:inline-block;padding-right:2em}
.marquee-track i{color:var(--gold-2);font-style:normal;margin:0 .6em;font-size:8px;vertical-align:middle}

/* ---------- Hero scroll indicator ---------- */
.hero-scroll{
  position:absolute;left:50%;bottom:34px;transform:translateX(-50%);z-index:4;
  display:flex;flex-direction:column;align-items:center;gap:12px;color:rgba(255,255,255,.75);
  opacity:0;animation:fadeIn 1.4s ease 1.9s forwards;
}
.hero-scroll .hs-label{font-family:var(--font-en);font-size:9.5px;font-weight:600;letter-spacing:.42em;text-indent:.42em}
.hero-scroll .hs-line{width:1px;height:56px;background:rgba(255,255,255,.35);position:relative;overflow:hidden}
.hero-scroll .hs-line::after{content:"";position:absolute;inset:0;background:#fff;animation:scrollDrop 2.4s var(--ease) infinite}
.hero-scroll:hover{color:#fff}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;background:var(--navy-deep);color:#fff;padding:100px 0 30px;overflow:hidden;
}
.site-footer .footer-wm{
  position:absolute;left:0;right:0;bottom:-4vw;text-align:center;
  font-family:var(--font-en-serif);font-size:26vw;font-weight:400;letter-spacing:.02em;line-height:.75;
  color:rgba(255,255,255,.04);pointer-events:none;user-select:none;
}
.site-footer .footer-top{display:grid;grid-template-columns:1.3fr 2fr;gap:60px;position:relative;z-index:1}
.site-footer .brand{color:#fff}
.site-footer .tag{margin:26px 0 0;font-size:13.5px;line-height:2.1;color:rgba(255,255,255,.72);max-width:340px}
.fnav{display:grid;grid-template-columns:repeat(2,1fr);gap:40px}
.fnav .col{display:flex;flex-direction:column;gap:12px}
.fnav .col-title{font-family:var(--font-en);font-size:10.5px;font-weight:600;letter-spacing:.42em;color:var(--gold-2);text-transform:uppercase;margin-bottom:14px;display:inline-flex;align-items:center;gap:12px}
.fnav .col-title::before{content:"";width:22px;height:1px;background:currentColor;opacity:.5}
.fnav .col a{font-size:13.5px;color:rgba(255,255,255,.85);transition:color .3s,letter-spacing .3s;padding:2px 0}
.fnav .col a:hover{color:var(--gold-2);letter-spacing:.06em}
.footer-bottom{
  margin-top:80px;padding-top:26px;border-top:1px solid var(--hair-dark);
  display:flex;justify-content:space-between;align-items:center;
  font-size:11.5px;letter-spacing:.24em;color:rgba(255,255,255,.55);position:relative;z-index:1;
}
.footer-bottom .en{font-family:var(--font-en);letter-spacing:.42em;color:var(--gold-2);opacity:.85}
@media(max-width:820px){
  .site-footer .footer-top{grid-template-columns:1fr;gap:40px}
  .fnav{gap:28px}
  .footer-bottom{flex-direction:column;gap:14px;text-align:center}
}