body{margin:0;background:#f5f7f9;color:#172537;font-family:system-ui,sans-serif}main{max-width:720px;margin:12vh auto;padding:32px}h1{font-size:clamp(2rem,6vw,3.5rem)}p{line-height:1.7}form{gap:16px;max-width:360px}form,label{display:grid}label{gap:4px}button,input{font:inherit;padding:8px 12px}button{justify-self:start}