/* =========================================================
   余白 YOHAKU GALLERY  ─  横スクロール・エディトリアル
   パラダイム: 物語が横方向に流れる雑誌的ギャラリー
   ========================================================= */

:root{
  --ink:#16140f;        /* 紙の黒 */
  --ink-2:#26221b;
  --paper:#f4efe6;      /* オフホワイト紙 */
  --paper-2:#e9e1d3;
  --accent:#d4452f;     /* 朱（展覧会ポスターの赤） */
  --accent-deep:#a3331f;
  --line:rgba(22,20,15,.16);
  --serif:"Bodoni Moda", serif;
  --mincho:"Shippori Mincho", serif;
  --gothic:"Zen Kaku Gothic New", sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{ -webkit-text-size-adjust:100%; }
body{
  font-family:var(--gothic);
  background:var(--paper);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  line-height:1.8;
}
img{display:block;width:100%;height:100%;object-fit:cover}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:var(--paper)}

.num{font-feature-settings:"tnum" 1}

/* ---------- ローダー ---------- */
.loader{position:fixed;inset:0;z-index:120;background:var(--paper);
  display:flex;align-items:center;justify-content:center;transition:opacity .7s var(--ease),visibility .7s}
.loader.is-done{opacity:0;visibility:hidden}
.loader__inner{text-align:center;display:flex;flex-direction:column;align-items:center;gap:.7rem}
.loader__num{font-family:var(--serif);letter-spacing:.3em;font-size:.8rem;color:var(--accent)}
.loader__name{font-family:var(--mincho);font-size:clamp(3rem,9vw,6rem);font-weight:800;line-height:1}
.loader__bar{width:170px;height:1px;background:var(--line);overflow:hidden}
.loader__bar i{display:block;height:100%;width:0;background:var(--accent);animation:load 1.1s var(--ease) forwards}
@keyframes load{to{width:100%}}

/* ---------- ヘッダー ---------- */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:90;
  display:flex;align-items:center;justify-content:space-between;
  padding:1.1rem clamp(1.1rem,4vw,2.6rem);mix-blend-mode:difference;color:#fff}
.brand{display:flex;align-items:baseline;gap:.6rem}
.brand__jp{font-family:var(--mincho);font-weight:800;font-size:1.5rem;letter-spacing:.08em}
.brand__en{font-family:var(--serif);font-size:.7rem;letter-spacing:.34em}
.nav{display:flex;gap:1.7rem}
.nav a{font-size:.82rem;letter-spacing:.04em;position:relative;padding-bottom:2px}
.nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:#fff;transition:width .35s var(--ease)}
.nav a:hover::after{width:100%}
.btn-visit{font-family:var(--serif);font-size:.78rem;letter-spacing:.2em;border:1px solid #fff;
  padding:.6rem 1.2rem;border-radius:40px;transition:.35s var(--ease)}
.btn-visit:hover{background:#fff;color:var(--ink)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:#fff;transition:.3s}

.drawer{position:fixed;inset:0;z-index:85;background:var(--ink);color:var(--paper);
  display:flex;flex-direction:column;justify-content:center;gap:1.4rem;padding:0 2rem;
  transform:translateY(-100%);transition:transform .55s var(--ease);visibility:hidden}
.drawer.is-open{transform:translateY(0);visibility:visible}
.drawer a{font-family:var(--mincho);font-size:1.7rem}
.drawer__cta{font-family:var(--serif)!important;font-size:1rem!important;color:var(--accent);letter-spacing:.2em}

/* ---------- 進行バー / スクロールヒント ---------- */
.progress{position:fixed;left:0;bottom:0;width:100%;height:3px;z-index:80;background:var(--line)}
.progress i{display:block;height:100%;width:0;background:var(--accent)}
.scroll-hint{position:fixed;right:clamp(1rem,4vw,2.6rem);bottom:1.6rem;z-index:80;
  display:flex;align-items:center;gap:.6rem;font-family:var(--serif);font-size:.72rem;letter-spacing:.24em;
  color:var(--ink);opacity:.6;transition:opacity .5s}
.scroll-hint svg{width:40px;height:8px}
.scroll-hint.is-hidden{opacity:0}

/* =========================================================
   横スクロール骨格
   ========================================================= */
.h-scroll{position:relative}
.h-track{
  display:flex;
  /* JS有効時はGSAPでpin+横移動。JS無効時は折返さず横スクロール可能（フォールバック） */
}
.h-scroll.no-js .h-track{flex-wrap:nowrap;overflow-x:auto;scroll-snap-type:x mandatory}
.panel{
  position:relative;
  flex:0 0 auto;
  width:100vw;height:100vh;min-height:600px;
  padding:7.5rem clamp(1.4rem,5vw,5rem) 5rem;
  display:flex;align-items:center;
  scroll-snap-align:start;
  overflow:hidden;
}

/* ---------- パネル01 ヒーロー ---------- */
.panel--hero{background:var(--ink);color:var(--paper);align-items:center;gap:clamp(2rem,5vw,6rem)}
/* 雑誌マストヘッド: 上端の罫線バー */
.masthead{position:absolute;top:5.4rem;left:clamp(1.4rem,5vw,5rem);right:clamp(1.4rem,5vw,5rem);
  display:flex;align-items:center;gap:1.4rem;padding-bottom:.7rem;
  border-bottom:1px solid rgba(244,239,230,.28);
  font-family:var(--serif);font-size:.72rem;letter-spacing:.24em;color:rgba(244,239,230,.62);text-transform:uppercase}
.masthead__free{margin-left:auto;color:var(--ink);background:var(--accent);
  padding:.15rem .55rem;letter-spacing:.18em;border-radius:2px}
.hero__index{position:absolute;top:8.4rem;left:clamp(1.4rem,5vw,5rem);
  font-family:var(--serif);font-size:.8rem;letter-spacing:.3em;color:var(--accent)}
/* 作品プレートの外枠タグ（編集的） */
.hero__plate-tag{position:absolute;top:-1.6rem;left:0;font-family:var(--serif);font-size:.7rem;
  letter-spacing:.26em;color:rgba(244,239,230,.55);z-index:3}
.hero__plate::before{content:"";position:absolute;inset:-14px;border:1px solid rgba(244,239,230,.25);z-index:0;pointer-events:none}
.hero__lines{position:relative;z-index:2;max-width:46%}
.hero__small{font-family:var(--serif);font-size:.82rem;letter-spacing:.28em;color:rgba(244,239,230,.6);display:block;margin-bottom:1.4rem}
.hero__title{font-family:var(--mincho);font-weight:800;line-height:1.02;
  font-size:clamp(3rem,7.6vw,7.4rem);letter-spacing:.01em}
/* 見出し語: 各語を行内マスクで隠し、下からせり上げ＋微スキューで「立ち上がる」キネティック */
.hero__title{overflow:visible}
.hero__word{display:inline-block;transform:translateY(115%) skewY(7deg);opacity:0;
  will-change:transform,opacity}
.hero__word--em{color:var(--accent);font-style:normal}
.hero__title .hero__word{clip-path:inset(0 0 -25% 0)}
.hero__read{margin-top:1.8rem;font-size:clamp(1rem,1.5vw,1.2rem);color:rgba(244,239,230,.82);line-height:1.9}
.hero__meta{margin-top:1.6rem;display:flex;gap:.8rem;font-family:var(--serif);font-size:.82rem;letter-spacing:.16em;color:rgba(244,239,230,.7)}
.hero__meta .dot{color:var(--accent)}
.hero__plate{position:relative;z-index:2;width:clamp(260px,30vw,440px);aspect-ratio:1/1;flex:0 0 auto;
  box-shadow:0 50px 90px rgba(0,0,0,.5)}
/* WebGL液状ディスプレイスメント層: canvas が img の上に重なる。canvas成功時は img を不透明度0で隠す */
.hero__plate-gl{position:absolute;inset:0;overflow:hidden}
.hero__plate-gl canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero__plate-gl.gl-on #heroPlateImg{opacity:0}
/* 開いた瞬間にプレートが現像する間の枠の点灯（JS主導で .is-lit を付与） */
.hero__plate::after{content:"";position:absolute;inset:-14px;border:1px solid var(--accent);
  opacity:0;transform:scale(1.04);transition:opacity .9s var(--ease),transform 1.2s var(--ease);z-index:4;pointer-events:none}
.hero__plate.is-lit::after{opacity:.55;transform:scale(1)}
.hero__plate figcaption{position:absolute;left:0;bottom:-2rem;font-family:var(--serif);font-size:.74rem;
  letter-spacing:.12em;color:rgba(244,239,230,.55);font-style:italic}
.hero__bigtype{position:absolute;right:-2vw;bottom:-3vh;font-family:var(--serif);font-weight:900;
  font-size:34vh;line-height:.7;color:rgba(244,239,230,.05);pointer-events:none;z-index:1;letter-spacing:-.02em}

/* ---------- パネル02 会期中 ---------- */
.panel--current{background:var(--paper);gap:clamp(2rem,5vw,6rem)}
.current__num,.about__num,.visit__num{position:absolute;font-family:var(--serif);font-weight:900;
  font-size:22vw;line-height:.7;color:rgba(22,20,15,.05);top:-2vh;left:-1vw;pointer-events:none;z-index:0}
.current__img{width:clamp(280px,30vw,430px);aspect-ratio:4/5;flex:0 0 auto;position:relative;z-index:1;
  box-shadow:0 40px 70px rgba(22,20,15,.22)}
.current__text{position:relative;z-index:1;max-width:42%}
.kicker{font-family:var(--serif);font-size:.78rem;letter-spacing:.26em;color:var(--accent);margin-bottom:1rem;text-transform:uppercase}
.kicker--light{color:var(--accent)}
.current__title{font-family:var(--mincho);font-weight:800;font-size:clamp(2.4rem,4.5vw,4rem);line-height:1.05}
.current__sub{font-family:var(--serif);font-style:italic;font-size:1.05rem;color:var(--ink-2);margin:.4rem 0 1.4rem}
.current__body{font-size:1rem;max-width:34ch;color:var(--ink-2)}
.current__spec{margin:1.6rem 0;border-top:1px solid var(--line)}
.current__spec div{display:flex;gap:1.4rem;padding:.6rem 0;border-bottom:1px solid var(--line);font-size:.9rem}
.current__spec dt{font-family:var(--serif);letter-spacing:.14em;min-width:4.5em;color:var(--accent)}
.btn-line{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--serif);letter-spacing:.16em;
  font-size:.95rem;border-bottom:1px solid var(--ink);padding-bottom:4px;transition:.35s var(--ease)}
.btn-line span{transition:transform .35s var(--ease)}
.btn-line:hover{color:var(--accent);border-color:var(--accent)}
.btn-line:hover span{transform:translateX(6px)}

/* ---------- 作品ギャラリー ---------- */
.panel--works{width:auto;gap:clamp(1.6rem,3vw,3.4rem);background:var(--paper-2);align-items:center}
.works__head{flex:0 0 auto;width:min(34vw,420px);padding-right:2rem}
.works__title{font-family:var(--mincho);font-weight:800;font-size:clamp(2rem,4vw,3.6rem);line-height:1.1}
.card-work{flex:0 0 auto;position:relative;background:#fff;padding:14px;box-shadow:0 30px 60px rgba(22,20,15,.16)}
.card-work figure{overflow:hidden;position:relative}
/* スクロール速度を --vel(px) で受け取り、画像を横へずらし＋縦に伸縮させて「溶け・歪み」を作る。
   transform/filterのみ＝GPU合成で60fps。JSがrAFで --vel と --rgb を更新 */
.card-work img{will-change:transform,filter;
  transform:scale(1.04) translateX(var(--vel,0px)) skewX(calc(var(--vel,0px) * 0.05));
  filter:drop-shadow(calc(var(--rgb,0px) * 1) 0 0 rgba(212,69,47,.5))
         drop-shadow(calc(var(--rgb,0px) * -1) 0 0 rgba(40,120,160,.45))}
.card-work:hover img{transform:scale(1.07)}
.card-work figure::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:2;
  background:linear-gradient(100deg,rgba(244,239,230,0) 40%,rgba(244,239,230,.12) 50%,rgba(244,239,230,0) 60%);
  transform:translateX(calc(var(--vel,0px) * 3));opacity:.0;transition:opacity .3s}
.card-work.is-moving figure::after{opacity:1}
.card-work--tall{width:clamp(240px,24vw,360px)}
.card-work--tall figure{aspect-ratio:3/4}
.card-work--wide{width:clamp(360px,38vw,560px)}
.card-work--wide figure{aspect-ratio:4/3}
.card-work--full{width:clamp(360px,40vw,600px)}
.card-work--full figure{aspect-ratio:3/2}
.card-work__cap{padding:.9rem .3rem .2rem}
.card-work__no{font-family:var(--serif);font-size:.74rem;letter-spacing:.24em;color:var(--accent)}
.card-work__cap h3{font-family:var(--mincho);font-weight:700;font-size:1.25rem;margin:.2rem 0}
.card-work__cap p{font-size:.8rem;color:var(--ink-2);letter-spacing:.04em}
.card-work__cap--over{position:absolute;left:14px;right:14px;bottom:14px;padding:1.2rem;
  background:linear-gradient(0deg,rgba(22,20,15,.82),transparent);color:var(--paper)}
.card-work__cap--over h3{color:var(--paper)}
.card-work__cap--over p{color:rgba(244,239,230,.8)}

/* ---------- About ---------- */
.panel--about{background:var(--ink);color:var(--paper);gap:clamp(2rem,5vw,6rem)}
.panel--about .current__num,.about__num{color:rgba(244,239,230,.05)}
.about__text{position:relative;z-index:1;max-width:46%}
.about__title{font-family:var(--mincho);font-weight:800;font-size:clamp(2rem,3.8vw,3.4rem);line-height:1.18;margin-bottom:1.4rem}
.about__text p{color:rgba(244,239,230,.8);margin-bottom:1rem;max-width:42ch}
.about__who{border-left:2px solid var(--accent);padding-left:1.1rem;font-size:.95rem}
.about__points{list-style:none;margin-top:1.6rem;display:flex;flex-direction:column;gap:.8rem}
.about__points li{display:flex;gap:1rem;align-items:baseline;font-size:.95rem;color:rgba(244,239,230,.9)}
.about__points span{font-family:var(--serif);color:var(--accent);font-size:.8rem;letter-spacing:.1em}
.about__fig{width:clamp(300px,34vw,520px);aspect-ratio:3/2;position:relative;z-index:1;box-shadow:0 40px 80px rgba(0,0,0,.5)}
.about__fig figcaption{position:absolute;left:0;bottom:-1.8rem;font-family:var(--serif);font-style:italic;font-size:.74rem;color:rgba(244,239,230,.5)}

/* ---------- 来場者の声 ---------- */
.panel--voice{width:auto;background:var(--paper);gap:clamp(1.6rem,3vw,3rem);align-items:center}
.voice__head{flex:0 0 auto;width:min(32vw,400px);padding-right:2rem}
.voice__title{font-family:var(--mincho);font-weight:800;font-size:clamp(2rem,3.8vw,3.4rem);line-height:1.1;margin:.4rem 0}
.voice__score{font-family:var(--serif);font-size:2.4rem;display:flex;align-items:baseline;gap:.6rem}
.voice__score .voice__of{font-size:.82rem;letter-spacing:.06em;color:var(--ink-2);font-family:var(--gothic)}
.voice__row{display:flex;gap:1.4rem;align-items:stretch}
.quote{flex:0 0 auto;width:clamp(260px,26vw,360px);background:#fff;padding:1.8rem;
  border:1px solid var(--line);display:flex;flex-direction:column;box-shadow:0 20px 40px rgba(22,20,15,.07)}
.quote__stars{color:var(--accent);letter-spacing:.1em;font-size:.95rem;margin-bottom:1rem}
.quote blockquote{font-family:var(--mincho);font-size:1.02rem;line-height:1.95;color:var(--ink);flex:1}
.quote figcaption{margin-top:1.2rem;display:flex;flex-direction:column;gap:.2rem;border-top:1px solid var(--line);padding-top:1rem}
.quote figcaption span:first-child{font-family:var(--serif);letter-spacing:.1em}
.quote__scene{font-size:.78rem;color:var(--accent)}

/* ---------- Visit / CTA ---------- */
.panel--visit{background:var(--accent);color:var(--paper)}
.visit__inner{position:relative;z-index:1;max-width:680px}
.panel--visit .kicker{color:var(--ink)}
.visit__title{font-family:var(--mincho);font-weight:800;font-size:clamp(2.2rem,4.4vw,4rem);line-height:1.12;margin-bottom:1.2rem}
.visit__lead{font-size:1.05rem;color:rgba(244,239,230,.92);margin-bottom:1.8rem}
.visit__actions{display:flex;gap:1rem;flex-wrap:wrap;margin-bottom:2rem}
.btn-fill{background:var(--ink);color:var(--paper);font-family:var(--serif);letter-spacing:.16em;
  padding:1rem 2rem;border-radius:50px;transition:.35s var(--ease)}
.btn-fill:hover{background:var(--paper);color:var(--ink);transform:translateY(-3px)}
.btn-outline{border:1px solid var(--paper);padding:1rem 1.8rem;border-radius:50px;font-family:var(--serif);
  letter-spacing:.16em;transition:.35s var(--ease)}
.btn-outline:hover{background:var(--paper);color:var(--accent)}
.visit__dl{display:grid;grid-template-columns:repeat(2,1fr);gap:.2rem 2rem;border-top:1px solid rgba(244,239,230,.4)}
.visit__dl div{display:flex;gap:1.2rem;padding:.7rem 0;border-bottom:1px solid rgba(244,239,230,.25);font-size:.92rem}
.visit__dl dt{font-family:var(--serif);letter-spacing:.14em;min-width:4em;color:var(--ink)}
.visit__bigtype{position:absolute;right:-4vw;bottom:-8vh;font-family:var(--mincho);font-weight:800;
  font-size:42vh;line-height:.7;color:rgba(22,20,15,.1);pointer-events:none;z-index:0}

/* ---------- フッター（横スクロール末尾の縦帯） ---------- */
.site-footer{display:flex;align-items:center;gap:1.4rem;flex-wrap:wrap;justify-content:center;
  background:var(--ink);color:rgba(244,239,230,.7);padding:2.4rem 2rem;text-align:center}
.site-footer .brand__jp{color:var(--paper)}
.site-footer__addr{font-size:.84rem}
.site-footer__copy{font-family:var(--serif);font-size:.74rem;letter-spacing:.14em}

/* =========================================================
   レスポンシブ: タブレット以下は縦積みフォールバック
   （横スクロール体験はPC専用。狭幅では素直な縦読みに）
   ========================================================= */
@media (max-width:900px){
  .nav,.btn-visit{display:none}
  .nav-toggle{display:flex}
  .scroll-hint{display:none}
  .h-track{flex-direction:column!important;flex-wrap:nowrap!important;overflow:visible!important;transform:none!important}
  .panel{width:100%;height:auto;min-height:auto;flex-direction:column;align-items:flex-start;
    padding:6rem clamp(1.4rem,6vw,3rem) 4rem;gap:2rem}
  .progress{display:none}
  .hero__lines,.current__text,.about__text,.visit__inner{max-width:100%}
  .hero__plate,.current__img,.about__fig{width:100%;max-width:460px}
  .hero__bigtype,.visit__bigtype{font-size:24vw;bottom:auto;top:auto;right:-2vw}
  .panel--hero{align-items:flex-start}
  .masthead{position:static;margin-bottom:1.4rem;flex-wrap:wrap;gap:.6rem 1rem;font-size:.64rem}
  .hero__index{display:none}
  .works__head,.voice__head{width:100%;padding-right:0}
  .panel--works,.panel--voice{align-items:flex-start}
  .card-work,.quote{width:100%;max-width:520px}
  .card-work--tall figure{aspect-ratio:4/3}
  .voice__row{flex-direction:column}
  .visit__dl{grid-template-columns:1fr}
}
@media (max-width:600px){
  .site-header{padding:.9rem 1.1rem}
  .hero__title{font-size:clamp(2.6rem,12vw,4rem)}
  .visit__actions{flex-direction:column}
  .btn-fill,.btn-outline{text-align:center}
}

/* ---------- reduced-motion: アニメ無効・全要素即可視 ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .hero__word{transform:none!important;opacity:1!important}
  .loader{display:none}
}