*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;overflow:hidden;touch-action:manipulation;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;background:#111;color:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}#app{width:100%;height:100%;position:relative;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)}#popup-container{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;pointer-events:none}#popup-container:not(:empty){pointer-events:auto}.popup-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center}.popup-box{background:#222;border:1px solid #444;border-radius:12px;padding:24px;min-width:280px;max-width:90vw}.popup-title{font-size:18px;font-weight:700;margin-bottom:12px}.popup-message{font-size:14px;color:#ccc;margin-bottom:20px;line-height:1.5}.popup-buttons{display:flex;gap:8px;justify-content:flex-end}.popup-btn{padding:8px 20px;border-radius:8px;border:none;font-size:14px;cursor:pointer}.popup-btn.primary{background:#4a9eff;color:#fff}.popup-btn.secondary{background:#444;color:#fff}#demo-banner{position:fixed;top:calc(env(safe-area-inset-top) + 8px);left:50%;transform:translate(-50%);background:#ffc800e6;color:#000;padding:4px 16px;border-radius:20px;font-size:12px;font-weight:700;z-index:500;pointer-events:none}#ota-loading{position:fixed;top:0;right:0;bottom:0;left:0;background:#111;display:flex;align-items:center;justify-content:center;z-index:9999}.ota-spinner{width:40px;height:40px;border:3px solid rgba(255,255,255,.2);border-top-color:#fff;border-radius:50%;animation:ota-spin .8s linear infinite}@keyframes ota-spin{to{transform:rotate(360deg)}}#hud{padding:8px 16px;font-size:20px;font-weight:700;text-align:center}#game-area{flex:1;display:flex;align-items:center;justify-content:center}