/* Production polish */
:root{
  --bg:#0b0e13; --bg-soft:#0f131a; --card:rgba(255,255,255,.06);
  --text:#e7e7ea; --muted:#98a0ad; --ring:#28324a;
  --accent:#7aa2ff; --ok:#38d39f; --gold:#ffd36a;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#f6f7fb; --bg-soft:#fff; --card:rgba(0,0,0,.04);
    --text:#151922; --muted:#5b6472; --ring:#e8ecff;
    --accent:#3456ff; --ok:#1eae78; --gold:#d9b24a; --shadow:0 10px 22px rgba(0,0,0,.10);
  }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Arial,sans-serif}
.bg{position:fixed;inset:0;pointer-events:none;overflow:hidden}
.bg .beam{position:absolute;top:-30vh;bottom:-30vh;width:20vw;filter:blur(20px);opacity:.08;background:linear-gradient(180deg,#7aa2ff,#38d39f);transform:rotate(20deg)}
.bg .beam.a{left:-5vw;animation:float 12s ease-in-out infinite alternate}
.bg .beam.b{left:30vw;animation:float 16s ease-in-out infinite alternate-reverse}
.bg .beam.c{right:-5vw;animation:float 14s ease-in-out infinite alternate}
@keyframes float{from{transform:translateY(-2vh) rotate(18deg)}to{transform:translateY(2vh) rotate(22deg)}}

.shell{max-width:820px;margin:0 auto;padding:20px}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.brand{display:flex;align-items:center;gap:12px}
.brandname{margin:0;font-size:22px;letter-spacing:.3px}
.icon-btn{background:var(--card);border:1px solid var(--ring);border-radius:12px;color:var(--text);padding:8px 10px;cursor:pointer;box-shadow:var(--shadow);transition:transform .08s}
.icon-btn:active{transform:scale(.98)}

.card.stage{position:relative;border:1px solid var(--ring);background:linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.015));border-radius:16px;padding:10px;box-shadow:var(--shadow);backdrop-filter: blur(6px)}
#game{display:block;margin:0 auto;max-width:100%;height:auto;border-radius:12px;border:1px solid var(--ring);background:#0a0e14}

.hud{position:absolute;left:14px;top:14px;display:flex;gap:8px;flex-wrap:wrap}
.pill{background:var(--bg-soft);border:1px solid var(--ring);border-radius:999px;padding:6px 10px;font-size:12px}
.pill.small{padding:6px 8px}

.tap-hint{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.35);border:1px solid var(--ring);padding:8px 10px;border-radius:999px;font-size:12px;color:#e7e7ea;opacity:.9;pointer-events:none}

.overlay{position:absolute;inset:10px;display:grid;place-items:center}
.panel{background:var(--bg-soft);border:1px solid var(--ring);border-radius:16px;box-shadow:var(--shadow);padding:16px 14px;max-width:92%;text-align:center}
.panel .row{display:flex;gap:10px;justify-content:center;margin-top:8px}
.panel .opt{display:block;margin:6px 0}
.hidden{display:none}

.primary{background:linear-gradient(180deg, var(--accent), #4e7dff);border:none;color:white;padding:10px 14px;border-radius:12px;cursor:pointer;box-shadow:var(--shadow)}
.secondary{background:var(--card);border:1px solid var(--ring);color:var(--text);padding:10px 14px;border-radius:12px;cursor:pointer}

.share-card{margin-top:8px;border:1px dashed var(--ring);border-radius:12px;padding:8px 10px;font-family:ui-monospace, SFMono-Regular, Menlo, monospace;font-size:12px;white-space:pre-wrap;color:var(--muted)}

.foot{text-align:center;opacity:.8;margin-top:10px}
.tiny{font-size:12px}.muted{color:var(--muted)}