:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;background-color:#f5f5f5;color:#333}.app{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;text-align:center}