*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;background:#071428;display:flex;justify-content:center;align-items:center;overflow:hidden;font-family:monospace;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}#game-wrapper{position:relative;width:100%;max-width:400px;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}#game-canvas{display:block;width:100%;aspect-ratio:400 / 700;image-rendering:pixelated;touch-action:none;max-height:calc(100svh - env(safe-area-inset-top) - env(safe-area-inset-bottom))}#top-bar{position:fixed;top:10px;top:max(10px,env(safe-area-inset-top));right:8px;display:flex;gap:5px;z-index:10}.hud-btn{width:30px;height:30px;display:flex;align-items:center;justify-content:center;background:#0000008c;border:1px solid rgba(255,255,255,.22);border-radius:6px;color:#ddd;font-size:.82rem;cursor:pointer;touch-action:manipulation;transition:background .12s,border-color .12s;-webkit-user-select:none;user-select:none;line-height:1}.hud-btn:hover:not(:disabled){background:#ffffff1f}.start-btn{width:40px;height:30px;font-size:1.05rem;border-color:#2ecc71a6;color:#2ecc71;background:#2ecc7126;border-radius:6px;border-width:2px}.start-btn:hover:not(:disabled){background:#2ecc714d}.start-btn:disabled{opacity:.3;cursor:not-allowed}.start-btn.next-wave{width:auto;min-width:60px;padding:0 8px;font-size:.72rem;letter-spacing:-.3px;border-color:#2ecc71e6;background:#2ecc7147;animation:pulse-green 1.2s ease-in-out infinite}@keyframes pulse-green{0%,to{box-shadow:0 0 #2ecc718c}50%{box-shadow:0 0 0 5px #2ecc7100}}#btn-pause.active{background:#ffffff26;border-color:#ffffff8c;color:#fff}.restart-btn{color:#e74c3c;border-color:#e74c3c66}.restart-btn:hover:not(:disabled){background:#e74c3c2e;border-color:#e74c3c}