<form onsubmit="return false;" class="pure-form" style="border-top: 1px solid #eee;border-bottom:1px solid #eee;background:#fafafa;margin:30px 0;padding:20px 10px;text-align:center">
  <input id="user-input" autofocus type="text" placeholder="Type a word ..." style="width:100%;max-width:600px;outline:0" />
</form>