:root{--x-ui:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--x-headline:var(--x-ui)}body{font-size:16px;line-height:1.6}h1,h2,h3{font-family:var(--x-headline);letter-spacing:-.01em}h1{font-weight:800}