/* ============================================================
   HOTEL SOSEI — 共通デザインシステム（nah-v1 暗夜影院ベース）
   墨 #111111 × 和紙白 #F5F3EE ／ 朱砂 #C3272B は予約専用
   ============================================================ */
:root{
  color-scheme: light;
  --ink:#0D0D0D; --ink2:#161616; --paper:#F5F3EE; --body:#2B2826;
  --vermilion:#C3272B; --line:rgba(43,40,38,.13); --line-w:rgba(245,243,238,.14);
  --oswald:'Oswald','Arial Narrow',sans-serif;
  --bebas:'Bebas Neue','Oswald','Arial Narrow',sans-serif;
  --gothic:'游ゴシック体','Yu Gothic','YuGothic','Hiragino Sans','Hiragino Kaku Gothic ProN',sans-serif;
  --mincho:'游明朝体','Yu Mincho','YuMincho','Hiragino Mincho ProN',serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--gothic);background:var(--ink);color:#EDEDE8;font-size:15px;letter-spacing:.04em;line-height:1.9;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

/* ---------- ナビ ---------- */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;display:flex;align-items:center;justify-content:space-between;
  padding:0 40px;height:64px;color:#F5F3EE;
  background:linear-gradient(180deg,rgba(0,0,0,.38),transparent);transition:background .4s}
.nav .logo{font-size:21px;font-weight:600;letter-spacing:.22em;mix-blend-mode:difference}
.nav .logo .en{font-family:var(--oswald);font-weight:400;letter-spacing:.32em;font-size:13px;opacity:.6;margin-left:12px}
.nav .links{display:flex;gap:32px;font-size:12px;letter-spacing:.18em;mix-blend-mode:difference;margin-left:auto}
/* 右側クラスター（言語→予約→ログイン→登録）を右端に密着させる。
   space-between の余白は links と lang-sw の auto マージンが吸収し、右側は隙間ゼロに */
.nav .lang-sw{margin-left:auto}
.nav .links a{opacity:.85}
.nav .links a:hover{opacity:.55}
.nav .acct{font-size:12px;letter-spacing:.14em;color:#F5F3EE;text-decoration:none;opacity:.85;
  mix-blend-mode:difference;margin-right:2px;white-space:nowrap}
.nav .acct:hover{opacity:.55}
/* 予約ボタンとログインの間隔 */
.nav .btn-vermilion{margin-right:4px}
/* 新規登録エントリー：朱色の丸ボタンで目立たせる（スマホでも表示） */
.nav .acct-reg{background:var(--vermilion,#C3272B);color:#fff;opacity:1;mix-blend-mode:normal;
  padding:8px 18px;border-radius:999px;margin-right:0;font-weight:600;
  transition:transform .25s,box-shadow .25s}
.nav .acct-reg:hover{opacity:1;transform:translateY(-1px);box-shadow:0 8px 22px rgba(195,39,43,.45)}
@media (max-width:720px){
  .nav{padding:0 16px}
  .nav .logo{font-size:15px;letter-spacing:.14em;white-space:nowrap}
  .nav .logo .en{display:none}
  .nav .acct{display:none}
  .nav .btn-vermilion{margin-right:10px;padding:8px 16px;font-size:11px}
  .nav .acct-reg{display:inline-block;font-size:11px;padding:7px 14px}
}
.btn-vermilion{display:inline-flex;align-items:center;justify-content:center;background:var(--vermilion);color:#fff;
  padding:10px 26px;border-radius:999px;font-size:12px;letter-spacing:.2em;font-weight:600;border:none;cursor:pointer;
  font-family:var(--gothic);white-space:nowrap;transition:transform .25s,box-shadow .25s;text-decoration:none}
.btn-vermilion:hover{transform:translateY(-1px);box-shadow:0 10px 28px rgba(195,39,43,.4)}
.btn-vermilion:disabled{opacity:.55;cursor:default;transform:none;box-shadow:none}

/* ---------- 画像プレースホルダー / ホバー拡大 ---------- */
.ph{background:#1a1a19;overflow:hidden;position:relative}
.ph img{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity 1s ease,transform 1.3s cubic-bezier(.19,1,.22,1)}
.ph img.loaded{opacity:1}
.zoom:hover img{transform:scale(1.08)}

/* ---------- フェードアップ ---------- */
.fade-up{opacity:0;transform:translateY(30px);transition:opacity .9s cubic-bezier(.22,.61,.36,1),transform .9s cubic-bezier(.22,.61,.36,1)}
.fade-up.in{opacity:1;transform:none}

/* ---------- セクション共通 ---------- */
.sec{padding:130px 48px}
.wrap{max-width:1240px;margin:0 auto}
.kick{font-family:var(--oswald);font-weight:300;font-size:12px;letter-spacing:.5em;text-transform:uppercase;margin-bottom:16px}
.title{font-family:var(--mincho);font-weight:500;font-size:36px;letter-spacing:.14em}
.sec-head{margin-bottom:72px}
.on-paper{background:var(--paper);color:var(--body)}
.on-paper .kick{color:#9a948a}
.on-paper .title{color:var(--ink)}
.on-ink .kick{color:rgba(245,243,238,.4)}
.on-ink .title{color:#F5F3EE}

/* ---------- 房型カード ---------- */
.room-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.room-group-title{grid-column:1/-1;font-family:var(--mincho);font-size:22px;font-weight:600;letter-spacing:.08em;color:var(--ink);margin:24px 0 0;padding-bottom:12px;border-bottom:1px solid var(--line)}
.room-card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;transition:box-shadow .4s,transform .4s;color:var(--body)}
.room-card:hover{box-shadow:0 30px 60px rgba(0,0,0,.12);transform:translateY(-4px)}
.room-card .ph{aspect-ratio:3/2;background:#DAD6CC}
.room-body{padding:34px 32px 38px;display:flex;flex-direction:column;flex:1}
.room-en{font-family:var(--oswald);font-weight:500;font-size:28px;letter-spacing:.05em;line-height:1.1;color:var(--ink)}
.room-jp{font-family:var(--mincho);font-size:14px;letter-spacing:.2em;color:#7a746b;margin:10px 0 20px}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.tag{font-size:11px;letter-spacing:.14em;color:#6d675f;border:1px solid var(--line);border-radius:999px;padding:4px 13px}
.room-desc{font-size:13px;color:#5c574f;line-height:2;margin-bottom:26px}
.room-foot{margin-top:auto;display:flex;align-items:flex-end;justify-content:space-between;gap:12px}
.price{font-size:11px;color:#8a857d}
.price strong{display:block;font-family:var(--oswald);font-weight:500;font-size:23px;color:var(--ink);white-space:nowrap;line-height:1.4}
.price strong small{font-size:12px;font-family:var(--gothic);color:#8a857d;font-weight:400}
.btn-room{background:var(--vermilion);color:#fff;border-radius:999px;padding:12px 22px;font-size:12px;letter-spacing:.18em;font-weight:600;white-space:nowrap;transition:box-shadow .3s,transform .3s}
.btn-room:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(195,39,43,.34)}
.avail-badge{display:inline-block;font-size:10px;letter-spacing:.16em;padding:3px 10px;border-radius:999px;margin-bottom:14px}
.avail-badge.ok{background:rgba(46,125,74,.12);color:#2E7D4A}
.avail-badge.ng{background:rgba(43,40,38,.08);color:#8a857d}

/* ---------- フィルター pill ---------- */
.pills{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:48px}
.pill{border:1px solid var(--line);background:transparent;border-radius:999px;padding:9px 22px;
  font-family:var(--gothic);font-size:12px;letter-spacing:.14em;color:#6d675f;cursor:pointer;transition:all .25s}
.pill:hover{border-color:#9a948a;color:var(--body)}
.pill.is-on{background:var(--ink);color:#F5F3EE;border-color:var(--ink)}

/* ---------- フッター ---------- */
.footer{background:#000;padding:140px 48px 60px;text-align:center;color:rgba(245,243,238,.6)}
.seal{width:96px;height:96px;margin:0 auto 46px;background:var(--vermilion);display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 1px rgba(195,39,43,.4),0 18px 44px rgba(195,39,43,.22)}
.seal span{writing-mode:vertical-rl;font-family:var(--mincho);font-weight:600;font-size:34px;letter-spacing:.08em;color:#F5F3EE;line-height:1.05}
.footer .fname{font-family:var(--mincho);font-size:18px;letter-spacing:.34em;color:#F5F3EE;margin-bottom:8px}
.footer .fname-en{font-family:var(--oswald);font-weight:300;font-size:11px;letter-spacing:.5em;color:rgba(245,243,238,.35);text-transform:uppercase;margin-bottom:54px}
.footer .flinks{display:flex;justify-content:center;gap:34px;flex-wrap:wrap;font-size:12px;letter-spacing:.16em;margin-bottom:60px}
.footer .flinks a{opacity:.65}.footer .flinks a:hover{opacity:1}
.footer .copy{font-size:11px;letter-spacing:.14em;color:rgba(245,243,238,.3);line-height:2}
.footer .copy .r{color:rgba(195,39,43,.9)}

/* ---------- ページヒーロー（下層ページ用） ---------- */
.page-hero{position:relative;height:52vh;min-height:400px;background:#000;overflow:hidden;display:flex;align-items:flex-end}
.page-hero .ph{position:absolute;inset:0}
.page-hero::after{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg,rgba(0,0,0,.42) 0%,rgba(0,0,0,.16) 50%,transparent 80%),
             linear-gradient(180deg,rgba(0,0,0,.32) 0%,transparent 32%,transparent 55%,rgba(0,0,0,.5) 100%)}
.page-hero .ph img{filter:brightness(1.14) saturate(1.05)}
.page-hero .inner{position:relative;z-index:2;padding:0 56px 56px;color:#fff;max-width:1240px;width:100%;margin:0 auto}
.page-hero h1{font-family:var(--bebas);font-weight:400;font-size:clamp(48px,6.4vw,88px);line-height:.96;letter-spacing:.02em}
.page-hero .sub{font-family:var(--mincho);font-size:16px;letter-spacing:.24em;color:rgba(255,255,255,.85);margin-top:16px}
.page-hero .kicker{font-family:var(--oswald);font-weight:300;font-size:11px;letter-spacing:.55em;color:rgba(255,255,255,.62);margin-bottom:18px;text-transform:uppercase}

/* ---------- レスポンシブ ---------- */
@media (max-width:960px){
  .nav{padding:0 20px}
  .nav .links{display:none}
  .sec{padding:90px 24px}
  .room-grid{grid-template-columns:1fr;gap:24px}
  .sec-head{margin-bottom:48px}
  .title{font-size:27px}
  .page-hero .inner{padding:0 24px 40px}
}
@media (prefers-reduced-motion: reduce){
  .ph img{transition:opacity .3s}
  .zoom:hover img{transform:none!important}
  .fade-up{opacity:1;transform:none;transition:none}
}