body{font-family:system-ui,sans-serif;max-width:760px;margin:40px auto;padding:20px;line-height:1.7}main{border:1px solid #ddd;border-radius:12px;padding:28px}label{display:block;margin:14px 0}input{display:block;width:100%;max-width:420px;padding:10px;box-sizing:border-box}button{padding:10px 18px;cursor:pointer}