*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:#f0f2f5;color:#333;line-height:1.6}
#app{max-width:1200px;margin:0 auto;padding:20px}