*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center;background:#f5f5f5;color:#111}main{text-align:center}h1{font-size:2.5rem;margin-bottom:.5rem}p{font-size:1.125rem;color:#555}