body{font-family:Helvetica,Arial,Sans-Serif}a{margin-bottom:8px;cursor:pointer;text-decoration:underline}a,input{display:block}input{width:320px;font-size:16px;padding:8px;margin-bottom:16px}button{margin-bottom:32px;cursor:pointer}pre{background:#000;color:#fff;padding:16px}