body{margin:0;background:#f5f5f1;color:#183a32;font:17px/1.8 system-ui}main{max-width:380px;margin:12vh auto;padding:28px}h1{border-bottom:3px solid #254f41}label,input,button{display:block;width:100%;box-sizing:border-box}input,button{font:inherit;padding:12px;margin:12px 0;border:1px solid #57685f;border-radius:3px}button{background:#254f41;color:white;cursor:pointer}:focus-visible{outline:3px solid #135cc5;outline-offset:3px}small{color:#555}