:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,sans-serif;background:#f6f7fb;color:#1a1a1a}*{box-sizing:border-box}body,html{margin:0;min-height:100%}body{background:linear-gradient(180deg,#f4f7ff,#ffffff)}main{padding:3rem 1.5rem;max-width:980px;margin:0 auto}h1,h2,h3,p{margin:0}h1{font-size:clamp(2.5rem,3vw,4rem);line-height:1.05}a{color:#209dd7;text-decoration:none}button,input,textarea{font:inherit}