* { box-sizing: border-box; margin: 0; padding: 0; } body { margin: 0; font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; background-color: #f9fafb; color: #000; line-height: 1.5; } #app { width: 100%; }