:root {
  --bg: #0b1321;
  --panel: rgba(16, 27, 51, 0.9);
  --panel-2: rgba(18, 35, 69, 0.92);
  --line: rgba(226, 232, 240, 0.18);
  --text: #f8fafc;
  --muted: #aebbd0;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; font-family: Tahoma, "Segoe UI", sans-serif; background: linear-gradient(135deg, rgba(35,55,98,0.88), transparent 34%), linear-gradient(225deg, rgba(31,79,76,0.62), transparent 30%), linear-gradient(180deg, #0f1a30, #0b1321 70%); color: var(--text); }
.shell { width: min(1000px, 100%); margin: 0 auto; padding: 12px; }
.topbar { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.topbar h1 { margin: 0; font-size: clamp(1.4rem, 3vw, 2.05rem); letter-spacing: 0; }
.topbar p { margin: 5px 0 0; color: var(--muted); font-size: 0.92rem; }
button { border: 0; border-radius: 8px; color: #fff; font-weight: 800; cursor: pointer; min-height: 40px; }
#restartBtn { padding: 9px 14px; background: linear-gradient(135deg, #f97316, #ea580c); white-space: nowrap; }
.hud { margin: 12px 0; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.chip { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; display: flex; justify-content: space-between; gap: 8px; background: linear-gradient(180deg, var(--panel), var(--panel-2)); }
.chip span { color: var(--muted); overflow-wrap: anywhere; }
.reward-bar { margin: 0 0 10px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
#rewardBtn { padding: 10px 14px; background: linear-gradient(135deg, #22c55e, #16a34a); }
#rewardBtn:disabled { opacity: 0.55; cursor: not-allowed; }
.reward-note { margin: 0; color: var(--muted); font-size: 0.88rem; }
.stage-shell { width: 100%; aspect-ratio: 16 / 9; border: 1px solid var(--line); border-radius: 8px; background: #0b172d; overflow: hidden; touch-action: none; box-shadow: 0 22px 56px rgba(2, 8, 23, 0.34); }
#game-stage, #game-stage canvas { width: 100%; height: 100%; display: block; }
.tip { margin: 8px 0; text-align: center; color: var(--muted); font-size: 0.85rem; }
.mobile-controls { display: grid; grid-template-columns: 1fr auto; gap: 14px; }
.pad { border: 1px solid var(--line); border-radius: 8px; padding: 10px; background: rgba(10, 19, 36, 0.6); }
.pad button, .fire { border-radius: 8px; background: #1d4ed8; padding: 10px 12px; }
.pad > button { display: block; width: 100%; margin-bottom: 8px; }
.row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.fire { background: linear-gradient(135deg, #ef4444, #dc2626); min-width: 100px; }
@media (min-width: 900px) { .mobile-controls { display: none; } }
@media (max-width: 760px) { .hud { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 520px) { .topbar { display: grid; } .hud { grid-template-columns: repeat(2, minmax(0, 1fr)); } }