:root{
  --bg:#0f1724;
  --card:#0b1220;
  --accent:#10b981;
  --muted:#9ca3af;
  --neon1:#7c3aed;
  --neon2:#06b6d4;
  --glass: rgba(255,255,255,0.04);
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;background:linear-gradient(180deg,var(--bg),#071024);color:#e6eef6;display:flex;align-items:center;justify-content:center;min-height:100vh}
.container{width:min(720px,94vw);padding:20px;background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.03);border-radius:12px;text-align:center}
h1{margin:0 0 8px;font-size:22px}
.score{margin:8px 0;color:var(--muted)}
canvas{display:block;margin:12px auto;background:#061122;border-radius:8px;box-shadow:0 4px 18px rgba(2,6,23,0.6)}
.controls{display:flex;gap:12px;justify-content:center;margin:12px 0}
.container{width:min(820px,96vw);padding:18px;background:linear-gradient(180deg,rgba(255,255,255,0.02),rgba(255,255,255,0.01));border:1px solid rgba(255,255,255,0.03);border-radius:14px;text-align:center;position:relative;overflow:hidden}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.logo{letter-spacing:2px;margin:0;font-size:18px}
.logo span{color:var(--neon1);margin:0 6px}
.hud{display:flex;gap:10px}
.hud-item{background:var(--glass);padding:8px 12px;border-radius:12px;color:var(--muted);font-size:13px}
.hud-item strong{display:block;color:#fff;font-size:16px}
.hud-mute{background:transparent;border:none;color:var(--muted);font-size:16px;padding:6px;border-radius:8px}
.hud-mute[aria-pressed="true"]{color:var(--neon2)}
.stage{position:relative;display:flex;justify-content:center;z-index:1}
.bg-canvas{position:absolute;inset:0;width:100%;height:100%;border-radius:12px;filter:blur(8px) saturate(120%);opacity:.18;z-index:0}
canvas{background:radial-gradient(1200px 400px at 10% 10%, rgba(12,30,50,0.6), rgba(6,17,34,0.95));border-radius:12px;box-shadow:0 12px 34px rgba(2,6,23,0.7);border:1px solid rgba(255,255,255,0.03);position:relative;z-index:1}
.vfx{position:absolute;inset:0;pointer-events:none}
.controls{display:flex;gap:12px;justify-content:center;margin:14px 0}
.neon{background:linear-gradient(90deg,var(--neon1),var(--neon2));border:none;color:#001011;padding:10px 18px;border-radius:12px;font-weight:700;box-shadow:0 6px 28px rgba(124,58,237,0.18),0 2px 6px rgba(6,182,212,0.06);transform:translateY(0);transition:transform .08s ease}
.neon:active{transform:translateY(2px);filter:brightness(.95)}
.instructions{color:var(--muted);font-size:13px}
.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,rgba(2,6,23,0.6),rgba(2,6,23,0.6));backdrop-filter: blur(6px);z-index:999;pointer-events:auto}
.panel{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:24px;border-radius:12px;border:1px solid rgba(255,255,255,0.04);width:min(520px,92vw);text-align:center}
.panel h2{margin:0 0 6px}
.panel p{color:var(--muted);margin:0 0 12px}
.panel-actions{display:flex;gap:10px;justify-content:center}
.primary{background:linear-gradient(90deg,var(--neon2),var(--neon1));border:none;color:#001011;padding:10px 18px;border-radius:10px;font-weight:700}
.ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--muted);padding:10px 14px;border-radius:10px}
/* pulsing start */
.primary{animation:btnPulse 2s infinite ease-in-out}
@keyframes btnPulse{0%{transform:scale(1)}50%{transform:scale(1.04)}100%{transform:scale(1)}}
.volume-control input[type=range]{width:110px}
.spotlight{position:absolute;inset:0;pointer-events:none}
/* bigger player */
.stage canvas{border-radius:12px}

footer{margin-top:12px;font-size:12px;color:rgba(255,255,255,0.25)}

/* small animated rings behind the scene */
.ring{position:absolute;border-radius:999px;opacity:.06;mix-blend-mode:screen;pointer-events:none}
.ring.r1{width:420px;height:420px;left:-120px;top:-80px;background:radial-gradient(circle at 30% 30%, var(--neon1), transparent)}
.ring.r2{width:360px;height:360px;right:-100px;bottom:-100px;background:radial-gradient(circle at 70% 70%, var(--neon2), transparent)}

.hud-item.volume-control{display:flex;align-items:center;gap:8px}