:root{--bg:#f5f7fb;--card:#fff;--ink:#111827;--muted:#69707a;--green:#119c5b;--red:#cf2e2e;--blue:#2563eb;--line:#e5e7eb}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink)}body{padding:14px}.shell{width:min(720px,100%);margin:auto}.brand{text-align:center;padding:8px 0 16px}.brand h1{font-size:28px;margin:0}.brand p{margin:5px 0 0;color:var(--muted)}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:18px;margin-bottom:14px;box-shadow:0 8px 28px rgba(0,0,0,.05)}.stack{display:grid;gap:12px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.hidden{display:none!important}button,input{font:inherit}button{width:100%;border:0;border-radius:16px;padding:15px 16px;background:var(--ink);color:#fff;font-size:17px;font-weight:800}button.secondary{background:#eef0f4;color:var(--ink)}button.danger{background:var(--red)}button:disabled{opacity:.45}input{width:100%;border:1px solid #d6dae1;border-radius:14px;padding:14px}.small{font-size:12px;color:var(--muted)}.status{font-size:14px;color:var(--muted);line-height:1.45}.big{font-size:21px;font-weight:850}.pill{display:inline-flex;align-items:center;gap:8px;padding:8px 11px;border-radius:999px;background:#eef0f4;font-size:13px;font-weight:800}.dot{width:9px;height:9px;border-radius:50%;background:#9ca3af}.dot.live{background:var(--green);box-shadow:0 0 0 5px rgba(17,156,91,.12)}.lang-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.lang-btn{background:#f3f4f6;color:var(--ink);text-align:left;border:2px solid transparent}.lang-btn.selected{background:#fff;border-color:var(--ink)}.audio-hero{text-align:center;padding:26px 18px}.audio-icon{font-size:54px;margin-bottom:8px}.audio-state{font-size:22px;font-weight:900}.audio-sub{margin-top:8px;color:var(--muted);line-height:1.45}.sound-meter{height:8px;border-radius:99px;background:#e5e7eb;overflow:hidden;margin-top:16px}.sound-meter>div{height:100%;width:0;background:var(--green);transition:width .12s ease}.controls{display:grid;grid-template-columns:1fr 1fr;gap:10px}.qr{display:block;width:min(250px,80vw);margin:auto}.warning{background:#fff8dd;border:1px solid #efd57c;border-radius:14px;padding:12px 14px;font-size:13px;line-height:1.4}.footer-space{padding-bottom:105px}.talk-footer{position:fixed;z-index:50;left:0;right:0;bottom:0;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:rgba(245,247,251,.94);backdrop-filter:blur(14px);border-top:1px solid rgba(0,0,0,.08);box-shadow:0 -8px 24px rgba(0,0,0,.08)}.talk-footer button{max-width:720px;margin:auto;min-height:58px}.popup{position:fixed;z-index:100;inset:calc(12px + env(safe-area-inset-top)) 12px auto 12px;margin:auto;max-width:700px;background:rgba(17,24,39,.97);color:white;border-radius:22px;padding:18px;box-shadow:0 20px 60px rgba(0,0,0,.35)}.popup h2{margin:0 0 8px;font-size:24px}.popup .translation{font-size:clamp(22px,5vw,34px);line-height:1.28;font-weight:850;max-height:38vh;overflow:auto}.popup .note{margin-top:10px;color:rgba(255,255,255,.72);font-size:13px}.popup.amber{border:2px solid #f59e0b}.transcript-backup{margin-top:10px;font-size:15px;color:#374151;line-height:1.45;max-height:160px;overflow:auto}.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.volume{width:100%}.good{color:var(--green)}.bad{color:var(--red)}
.footer-space{padding-bottom:125px}.talk-footer{position:fixed!important;width:100%;background:rgba(245,247,251,.96);-webkit-backdrop-filter:blur(14px);transform:translateZ(0);-webkit-transform:translateZ(0)}.talk-footer button{display:block;min-height:62px;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
@media(max-width:500px){.lang-grid,.controls,.guide-grid{grid-template-columns:1fr}.brand h1{font-size:25px}.card{border-radius:18px;padding:16px}}