:root{font-family:system-ui,-apple-system,Segoe UI,sans-serif;-webkit-text-size-adjust:100%}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;min-height:100vh;background:#0f172a;color:#e2e8f0}button{font-family:inherit;-webkit-tap-highlight-color:transparent;touch-action:manipulation}input,button{font-size:1rem}