:root{
  --bg:#08080a; --fg:#f5f3ef; --muted:rgba(245,243,239,.55);
  --accent:#e8b04b; --gap:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);
  font-family:Inter,system-ui,sans-serif;overflow:hidden;overscroll-behavior:none}
#app{position:fixed;inset:0}

/* ---------- Stage / Slides ---------- */
#stage{position:absolute;inset:0;background:var(--bg)}
.slide{position:absolute;inset:0;opacity:0;display:flex;align-items:center;justify-content:center;
  padding:max(env(safe-area-inset-top),18px) 18px max(env(safe-area-inset-bottom),18px);will-change:opacity,transform}
.slide .media{max-width:100%;max-height:100%;object-fit:contain;display:block;
  box-shadow:0 26px 80px rgba(0,0,0,.55);border-radius:3px;will-change:transform}

/* Mehrbild-Layouts */
.slide.multi{gap:var(--gap)}
.slide.triptych{flex-direction:row}
.slide.triptych .cell{height:100%;flex:1 1 0;min-width:0;display:flex;align-items:center;justify-content:center}
.slide.triptych .cell img{width:100%;height:100%;object-fit:cover;border-radius:3px;box-shadow:0 18px 50px rgba(0,0,0,.5)}
.slide.quad{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;gap:var(--gap);
  align-items:stretch;justify-items:stretch;align-content:stretch;width:100%;height:100%}
.slide.quad .cell{min-height:0;min-width:0;overflow:hidden}
.slide.quad .cell img{width:100%;height:100%;object-fit:cover;border-radius:3px;box-shadow:0 14px 40px rgba(0,0,0,.5)}
@media (max-aspect-ratio:1/1){
  .slide.triptych{flex-direction:column}
  .slide.triptych .cell{height:auto;width:100%;flex:1 1 0;min-height:0}
}

/* Eingangs-Übergänge (zufällig zugewiesen) */
.enter-fade{animation:fade .9s var(--ease) forwards}
.enter-kb{animation:fade 1.1s var(--ease) forwards}
.enter-kb .media{animation:kb 7s ease-out forwards}
.enter-zoom{animation:zoomin 1s var(--ease) forwards}
.enter-zoomblur{animation:zoomblur 1.1s var(--ease) forwards}
.enter-slideL{animation:slideL .85s var(--ease) forwards}
.enter-slideR{animation:slideR .85s var(--ease) forwards}
.enter-rise{animation:rise 1s var(--ease) forwards}
.leave{animation:leave .9s var(--ease) forwards}

@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes leave{from{opacity:1}to{opacity:0}}
@keyframes kb{from{transform:scale(1.02) translateY(0)}to{transform:scale(1.14) translateY(-1.5%)}}
@keyframes zoomin{from{opacity:0;transform:scale(1.12)}to{opacity:1;transform:scale(1)}}
@keyframes zoomblur{from{opacity:0;transform:scale(1.2);filter:blur(14px)}to{opacity:1;transform:scale(1);filter:blur(0)}}
@keyframes slideL{from{opacity:0;transform:translateX(7%)}to{opacity:1;transform:translateX(0)}}
@keyframes slideR{from{opacity:0;transform:translateX(-7%)}to{opacity:1;transform:translateX(0)}}
@keyframes rise{from{opacity:0;transform:translateY(5%) scale(1.04)}to{opacity:1;transform:translateY(0) scale(1)}}

/* ---------- Banner ---------- */
#banner{position:absolute;inset:0;z-index:30;display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity .7s var(--ease);pointer-events:none}
#banner:not(.hidden){opacity:1}
.banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;
  filter:blur(26px) brightness(.42) saturate(1.1);transform:scale(1.2);animation:bgdrift 9s ease-out forwards}
@keyframes bgdrift{from{transform:scale(1.2)}to{transform:scale(1.35)}}
#banner::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at center,rgba(0,0,0,.15),rgba(0,0,0,.72))}
.banner-inner{position:relative;text-align:center;padding:24px;transform:translateY(12px);opacity:0;
  animation:bannerIn .9s .15s var(--ease) forwards}
@keyframes bannerIn{to{transform:translateY(0);opacity:1}}
.banner-kicker{font-size:clamp(11px,2vw,15px);letter-spacing:.42em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.banner-title{font-family:"Playfair Display",serif;font-weight:700;font-size:clamp(40px,9vw,108px);line-height:1.02}
.banner-sub{margin-top:14px;font-weight:300;font-size:clamp(13px,2.4vw,20px);color:var(--muted);letter-spacing:.04em}

/* ---------- HUD ---------- */
#hud{position:absolute;left:0;right:0;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;
  padding:max(env(safe-area-inset-top),14px) 18px 28px;
  background:linear-gradient(to bottom,rgba(0,0,0,.5),transparent);
  opacity:0;transition:opacity .4s;pointer-events:none}
#app.show-hud #hud{opacity:1;pointer-events:auto}
.hud-left{display:flex;flex-direction:column;gap:2px;font-size:13px}
#chapName{font-weight:600;letter-spacing:.02em}
#counter{color:var(--muted);font-size:12px}
.hud-right{display:flex;gap:8px}
.hud-right button{background:rgba(255,255,255,.1);color:var(--fg);border:0;border-radius:999px;
  min-width:38px;height:38px;padding:0 13px;font-size:14px;cursor:pointer;backdrop-filter:blur(8px);
  transition:background .2s}
.hud-right button:hover{background:rgba(255,255,255,.22)}
#axisBtn{font-weight:600}
body.locked #axisBtn,body.locked #gridBtn{display:none}

#progress{position:absolute;left:0;bottom:0;height:3px;background:var(--accent);z-index:20;width:0;
  transition:width .5s var(--ease);box-shadow:0 0 12px var(--accent)}

/* ---------- Übersicht ---------- */
#overview{position:absolute;inset:0;z-index:40;background:rgba(8,8,10,.97);overflow:auto;
  padding:max(env(safe-area-inset-top),28px) 28px 60px}
.hidden{display:none!important}
.ov-head{display:flex;justify-content:space-between;align-items:baseline;max-width:1200px;margin:0 auto 10px}
.ov-head h1{font-family:"Playfair Display",serif;font-weight:700;font-size:clamp(28px,5vw,52px);margin:0}
#ovClose{background:none;border:0;color:var(--fg);font-size:26px;cursor:pointer}
.ov-section{max-width:1200px;margin:0 auto 26px}
.ov-section h2{font-weight:600;font-size:14px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin:24px 0 12px}
.ov-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.ov-card{position:relative;aspect-ratio:4/3;border-radius:12px;overflow:hidden;cursor:pointer;background:#15151a;
  transform:translateY(0);transition:transform .25s var(--ease),box-shadow .25s}
.ov-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(0,0,0,.5)}
.ov-card img{width:100%;height:100%;object-fit:cover;opacity:.82;transition:opacity .25s,transform .5s var(--ease)}
.ov-card:hover img{opacity:1;transform:scale(1.06)}
.ov-card .ov-meta{position:absolute;left:0;right:0;bottom:0;padding:30px 14px 12px;
  background:linear-gradient(to top,rgba(0,0,0,.82),transparent)}
.ov-card .ov-name{font-family:"Playfair Display",serif;font-size:22px;font-weight:700}
.ov-card .ov-count{font-size:12px;color:var(--muted);margin-top:2px}
.ov-card .ov-letter{position:absolute;top:10px;left:12px;font-size:12px;font-weight:600;
  background:var(--accent);color:#000;border-radius:6px;padding:2px 7px}

/* ---------- Hint & Loader ---------- */
#hint{position:absolute;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;
  background:rgba(8,8,10,.92);backdrop-filter:blur(6px)}
.hint-card{max-width:420px;padding:34px;text-align:left}
.hint-card h2{font-family:"Playfair Display",serif;font-size:38px;margin:0 0 18px;text-align:center}
.hint-card ul{list-style:none;padding:0;margin:0 0 24px;line-height:2.1;font-weight:300}
.hint-card b{color:var(--accent);font-weight:600;display:inline-block;min-width:120px}
#hintStart{display:block;margin:0 auto;background:var(--accent);color:#000;border:0;border-radius:999px;
  padding:13px 34px;font-size:15px;font-weight:600;cursor:pointer}
#loader{position:absolute;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;
  color:var(--muted);font-weight:300;letter-spacing:.1em}