html,body,#app,#game{width:100%;height:100%;margin:0;padding:0;overflow:hidden}html,body{background:#111;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;touch-action:none;overscroll-behavior:none}#app{position:fixed;inset:0;background:#111}#game canvas{display:block;margin:0 auto}#rotate-hint{display:none;position:fixed;inset:0;z-index:20;align-items:center;justify-content:center;flex-direction:column;gap:10px;padding:28px;text-align:center;color:#fff;background:#111111f0}#rotate-hint strong{font-size:28px}#rotate-hint span{max-width:360px;font-size:16px;opacity:.8}@media(orientation:portrait)and (max-width:900px){#rotate-hint{display:flex}}