:root{color:#18263b;background:#f4f7fb;font-family:system-ui,sans-serif}body{min-height:100vh;margin:0}main{max-width:48rem;margin:0 auto;padding:clamp(2rem,8vw,6rem) 1.5rem}h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.1}p{font-size:1.125rem;line-height:1.5}