html,body,#app{margin:0;width:100%;height:100%;overflow:hidden;background:#0f172a;touch-action:manipulation;-webkit-tap-highlight-color:transparent}canvas{display:block}.mobile-fullscreen-btn{position:fixed;top:max(10px,env(safe-area-inset-top));right:max(10px,env(safe-area-inset-right));z-index:10000;min-height:48px;padding:10px 16px;border:2px solid #e2e8f0;border-radius:12px;background:#0f172aeb;color:#f8fafc;font-size:15px;font-weight:700;font-family:Arial,sans-serif;box-shadow:0 4px 14px #00000059;touch-action:manipulation}.mobile-fullscreen-btn:active{transform:scale(.97);background:#1e293bf2}@media(orientation:landscape)and (max-height:500px){.mobile-fullscreen-btn{font-size:13px;min-height:40px;padding:8px 12px}}