:root{
  --bg:#1a1712; --bg2:#211d17; --card:#2a251d; --line:#3a3428;
  --ink:#f3ead9; --ink-dim:#b6a888; --accent:#c9a15a; --accent-ink:#1a1712;
  --ok:#7fae6b; --shadow:0 6px 20px rgba(0,0,0,.35);
  --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:17px;line-height:1.5;overscroll-behavior-y:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
.screen{max-width:640px;margin:0 auto;padding:0 18px}
[hidden]{display:none !important}

/* ---------- Home ---------- */
.home-hero{padding:38px 4px 18px}
.hero-kicker{color:var(--accent);text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:700}
.home-hero h1{margin:.15em 0 .1em;font-size:30px;line-height:1.15;font-weight:800}
.hero-sub{color:var(--ink-dim);font-size:15px}
.build-note{color:var(--ok);font-size:12px;font-weight:600;margin-top:8px;letter-spacing:.02em}

.offline-bar{margin:8px 0 4px}
.download-btn{width:100%;padding:14px;border-radius:14px;background:var(--accent);
  color:var(--accent-ink);font-weight:800;font-size:16px;box-shadow:var(--shadow)}
.download-btn:active{transform:translateY(1px)}
.download-btn[disabled]{opacity:.55}
.progress-wrap{margin-top:10px}
.progress-track{height:10px;border-radius:6px;background:var(--card);overflow:hidden}
.progress-fill{height:100%;width:0;background:var(--accent);transition:width .2s}
.progress-label{font-size:13px;color:var(--ink-dim);margin-top:6px}
.offline-ok{margin-top:10px;color:var(--ok);font-weight:700;font-size:14px}
.offline-ok::before{content:"\2713  "}

.map-figure{margin:20px 0 8px;background:var(--card);border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.map-wrap{position:relative}
.map-wrap img{width:100%;display:block}
.map-figure figcaption{padding:10px 14px;color:var(--ink-dim);font-size:13px}
.map-pins{position:absolute;inset:0}
.map-pin{position:absolute;width:44px;height:44px;transform:translate(-50%,-50%);
  border-radius:50%;padding:0;border:2px solid var(--accent);overflow:visible;
  background:var(--bg2);box-shadow:0 3px 10px rgba(0,0,0,.5)}
.map-pin img{width:100%;height:100%;object-fit:cover;border-radius:50%;display:block}
.map-pin:active{transform:translate(-50%,-50%) scale(1.15)}
.map-pin-num{position:absolute;right:-6px;bottom:-6px;width:19px;height:19px;
  border-radius:50%;background:var(--accent);color:var(--accent-ink);
  font-size:11px;font-weight:800;display:grid;place-items:center;
  border:2px solid var(--bg);line-height:1}

.index{margin:14px 0 8px}
.index-section{color:var(--accent);text-transform:uppercase;letter-spacing:.1em;
  font-size:12px;font-weight:700;margin:20px 2px 8px;border-bottom:1px solid var(--line);padding-bottom:6px}
.index-item{display:flex;align-items:center;gap:12px;padding:11px 8px;border-radius:12px}
.index-item:active{background:var(--bg2)}
.index-num{flex:0 0 26px;height:26px;border-radius:50%;background:var(--card);
  display:grid;place-items:center;font-size:13px;font-weight:700;color:var(--accent)}
.index-txt{flex:1;min-width:0}
.index-title{font-weight:600;font-size:16px;line-height:1.25}
.index-artist{color:var(--ink-dim);font-size:13px}

.start-btn{width:100%;margin:18px 0 8px;padding:15px;border-radius:14px;
  background:var(--card);border:1px solid var(--line);font-weight:800;font-size:17px}
.tiny-note{color:var(--ink-dim);font-size:12px;text-align:center;margin:14px 0 40px}

/* ---------- Tour top bar ---------- */
.tour-top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:8px;
  padding:10px 0;background:linear-gradient(var(--bg),rgba(26,23,18,.86));backdrop-filter:blur(6px)}
.tour-top-title{flex:1;text-align:center;font-weight:800;font-size:16px}
.icon-btn{width:42px;height:42px;border-radius:12px;font-size:20px;background:var(--card);
  border:1px solid var(--line);display:grid;place-items:center}

/* ---------- Feed ---------- */
.feed{padding-top:6px}
.section-rule{display:flex;align-items:center;gap:12px;margin:26px 2px 14px}
.section-rule::before,.section-rule::after{content:"";height:1px;flex:1;background:var(--line)}
.section-rule span{color:var(--accent);text-transform:uppercase;letter-spacing:.12em;
  font-size:12px;font-weight:800;white-space:nowrap}

.piece{background:var(--card);border:1px solid var(--line);border-radius:18px;
  margin:12px 0;overflow:hidden;transition:border-color .2s}
.piece.playing{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}
.piece-head{display:flex;gap:14px;padding:14px}
.thumb-wrap{flex:0 0 92px;position:relative}
.thumb{width:92px;height:92px;border-radius:12px;object-fit:cover;background:var(--bg2)}
.thumb-hint{position:absolute;right:5px;bottom:5px;background:rgba(0,0,0,.6);
  border-radius:8px;font-size:11px;padding:2px 6px;color:var(--ink)}
.piece-head-txt{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:center}
.piece-num{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.08em}
.piece-title{font-size:19px;font-weight:800;line-height:1.15;margin:2px 0}
.piece-meta{color:var(--ink-dim);font-size:13px}
.piece-actions{display:flex;gap:8px;padding:0 14px 14px}
.piece-play{flex:1;padding:11px;border-radius:11px;background:var(--accent);color:var(--accent-ink);
  font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center;gap:8px}
.piece-play.is-playing{background:var(--bg2);color:var(--ink);border:1px solid var(--line)}

.facts{max-height:0;overflow:hidden;transition:max-height .3s ease}
.facts.open{max-height:1400px}
.facts-inner{padding:2px 16px 16px}
.facts ul{margin:0;padding-left:18px}
.facts li{margin:7px 0;font-size:15px;line-height:1.45}
.facts .src{display:block;color:var(--ink-dim);font-size:11px;margin-top:14px;word-break:break-word}
.transcript-toggle{margin-top:12px;color:var(--accent);font-size:13px;font-weight:700}
.transcript{margin-top:8px;color:var(--ink-dim);font-size:14px;line-height:1.7;
  max-height:38vh;overflow-y:auto;padding-right:4px;
  scrollbar-width:thin;scrollbar-color:var(--line) transparent}
.transcript .w{cursor:pointer;border-radius:4px;transition:color .15s,background .15s}
.transcript .w:active{color:var(--accent)}
.transcript .sent-cur{color:var(--ink)}
.transcript .w-cur{color:var(--accent-ink);background:var(--accent);font-weight:700;
  padding:0 3px;margin:0 -3px}

/* ---------- Search ---------- */
.search-launch{width:100%;margin:6px 0 14px;padding:14px 16px;border-radius:14px;
  background:var(--bg2);border:1px solid var(--line);color:var(--ink-dim);
  font-size:15px;text-align:left;display:flex;align-items:center;gap:10px}
.search-glyph{color:var(--accent);font-size:18px;transform:rotate(-45deg);display:inline-block}

.overlay{position:fixed;inset:0;z-index:60;background:var(--bg)}
.search-head{display:flex;gap:8px;align-items:center;padding:12px 14px 8px;
  position:sticky;top:0;background:var(--bg)}
#search-input{flex:1;padding:13px 15px;border-radius:13px;border:1px solid var(--accent);
  background:var(--bg2);color:var(--ink);font-size:17px;outline:none}
#search-input::placeholder{color:var(--ink-dim)}
.search-hint{padding:26px 20px;color:var(--ink-dim);font-size:15px;text-align:center;line-height:1.6}
.search-hint-dim{font-size:13px;opacity:.75}
.search-results{padding:2px 14px 40px;overflow-y:auto;max-height:calc(100vh - 80px)}
.result{display:flex;gap:12px;align-items:center;padding:10px;border-radius:14px;
  background:var(--card);border:1px solid var(--line);margin:8px 0}
.result:active{border-color:var(--accent)}
.result-thumb{flex:0 0 64px;width:64px;height:64px;border-radius:10px;object-fit:cover;background:var(--bg2)}
.result-txt{flex:1;min-width:0}
.result-title{font-weight:700;font-size:16px;line-height:1.2}
.result-sub{color:var(--ink-dim);font-size:13px;margin-top:2px}
.result-room{color:var(--accent);font-size:11px;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;margin-top:3px}
.badge{flex:0 0 auto;font-size:11px;font-weight:800;border-radius:9px;padding:5px 9px;white-space:nowrap}
.badge-audio{background:var(--accent);color:var(--accent-ink)}
.badge-info{background:var(--bg2);color:var(--ink-dim);border:1px solid var(--line)}
.no-results{padding:20px;text-align:center;color:var(--ink-dim);font-size:14px;line-height:1.6}

/* ---------- Detail sheet ---------- */
.sheet{background:rgba(10,8,6,.72)}
.sheet-scrim{position:absolute;inset:0}
.sheet-card{position:absolute;left:0;right:0;bottom:0;max-height:88vh;overflow-y:auto;
  background:var(--bg2);border-radius:22px 22px 0 0;border:1px solid var(--line);border-bottom:0;
  box-shadow:0 -10px 40px rgba(0,0,0,.5)}
.sheet-close{position:absolute;top:12px;right:12px;z-index:2;background:rgba(26,23,18,.75)}
.sheet-img{width:100%;max-height:44vh;object-fit:contain;background:#14110d;border-radius:22px 22px 0 0}
.sheet-body{padding:16px 18px calc(28px + var(--safe-b))}
.sheet-room{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
.sheet-title{margin:.25em 0 .1em;font-size:24px;line-height:1.15}
.sheet-meta{color:var(--ink-dim);font-size:14px;margin-bottom:12px}
.sheet-audio{margin:4px 0 12px}
.sheet-facts{margin:0;padding-left:18px}
.sheet-facts li{margin:8px 0;font-size:15px;line-height:1.5}
.sheet-src{color:var(--ink-dim);font-size:11px;margin-top:16px;word-break:break-word}

/* ---------- Player ---------- */
.player{position:fixed;left:0;right:0;bottom:0;z-index:40;
  background:var(--bg2);border-top:1px solid var(--line);
  padding-bottom:var(--safe-b);box-shadow:0 -6px 20px rgba(0,0,0,.4)}
.player-progress{height:6px;background:var(--card);cursor:pointer}
.player-progress-fill{height:100%;width:0;background:var(--accent)}
.player-row{display:flex;align-items:center;gap:10px;padding:10px 14px}
.play-btn{flex:0 0 58px;height:58px;border-radius:50%;background:var(--accent);
  color:var(--accent-ink);display:grid;place-items:center;box-shadow:var(--shadow)}
.play-btn svg{fill:currentColor}
.player-meta{flex:1;min-width:0}
.player-now{font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.player-time{color:var(--ink-dim);font-size:12px}
.skip-btn{flex:0 0 44px;height:44px;border-radius:12px;background:var(--card);
  border:1px solid var(--line);font-size:13px;letter-spacing:-1px}