body{font:16px/1.6 system-ui,sans-serif;max-width:1100px;margin:0 auto;padding:2rem;color:#263238}header{border-bottom:2px solid #146c43}main{max-width:720px;margin:2rem auto}label{display:block;margin:1rem 0}input{display:block;padding:.55rem;width:100%;max-width:350px}button{padding:.6rem 1rem;cursor:pointer}