/* Prize mini-game (Spark Slingshot) */
.btn-prize{background:linear-gradient(180deg,#ff9ec8,#ff7eb3);box-shadow:0 6px 0 #e04890;margin-bottom:10px;font-size:1.15rem}
.btn-prize:active{box-shadow:0 3px 0 #e04890}
body.grade-adult .btn-prize{background:linear-gradient(180deg,#9ec5ff,#7aa6ff);box-shadow:0 6px 0 #3d6fd4;color:#0e1a30}
body.grade-adult .btn-prize:active{box-shadow:0 3px 0 #3d6fd4}
.prize-card{padding-bottom:16px}
.prize-head{display:flex;flex-wrap:wrap;justify-content:center;gap:4px;margin-bottom:4px}
.prize-pill{background:#ffe8f4;color:#c04078}
body.grade-adult .prize-pill{background:#3a4a68;color:#ff9ec8}
.prize-title{margin:8px 0 4px;font-size:clamp(1.3rem,5vw,1.7rem)}
.prize-howto{margin:0 0 12px;font-size:.95rem}
.prize-canvas-wrap{position:relative;border-radius:20px;overflow:hidden;box-shadow:inset 0 0 0 3px rgba(91,141,239,.2),0 8px 24px rgba(60,90,160,.15);background:#e8f4ff;touch-action:none;user-select:none;-webkit-user-select:none}
body.grade-adult .prize-canvas-wrap{box-shadow:inset 0 0 0 3px rgba(158,197,255,.25),0 8px 24px rgba(0,0,0,.35);background:#1a2238}
#prizeCanvas{display:block;width:100%;height:auto;max-height:min(52vh,480px);touch-action:none;cursor:grab}
#prizeCanvas:active{cursor:grabbing}
.prize-hud{font-weight:800;color:#3d6fd4;margin:12px 0 8px;min-height:1.4em}
body.grade-adult .prize-hud{color:#9ec5ff}
.prize-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(20,30,60,.42);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);z-index:5;padding:16px}
.prize-overlay.hidden{display:none!important}
.prize-overlay-inner{background:#fff;border-radius:20px;padding:20px 18px;width:min(100%,300px);box-shadow:0 12px 40px rgba(0,0,0,.25);text-align:center}
body.grade-adult .prize-overlay-inner{background:#243044;color:#e8eef8}
.prize-overlay-mark{font-size:2.6rem;line-height:1;margin-bottom:4px}
.prize-overlay-inner h3{margin:0 0 6px;font-size:1.4rem}
.prize-overlay-inner .cheer{margin:0 0 14px}
.prize-overlay-inner .btn{margin-top:0}
.prize-overlay-inner .btn-sec{margin-top:10px}
#prizeBack{margin-top:4px}

.btn-prize:disabled,
.btn-prize.btn-prize-locked{
  opacity:.6;
  cursor:not-allowed;
  filter:grayscale(.4);
  transform:none;
  background:linear-gradient(180deg,#d8d8e0,#bdbdc8);
  box-shadow:0 6px 0 #8e8e9a;
  color:#4a4a58;
  pointer-events:none;
}
.btn-prize:disabled:active,
.btn-prize.btn-prize-locked:active{
  transform:none;
  box-shadow:0 6px 0 #8e8e9a;
}
body.grade-adult .btn-prize:disabled,
body.grade-adult .btn-prize.btn-prize-locked{
  background:linear-gradient(180deg,#4a5568,#3a4558);
  box-shadow:0 6px 0 #1a2238;
  color:#a8b0c0;
}
.prize-timer-pill{
  background:#fff4d8;
  color:#8a5a00;
  font-variant-numeric:tabular-nums;
}
body.grade-adult .prize-timer-pill{
  background:#3a4a68;
  color:#ffe08a;
}