title: Input button remove "shadow"
body: <p>I can't remove grey "shadow" effect from input type button on half of it:</p>
  
  <p><a href="https://i.stack.imgur.com/hw1IY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hw1IY.png" alt="enter image description here"></a></p>
  
  <p>I checked all methods on forum but:</p>
  
  <pre><code>-webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  box-shadow: none;
  outline: white;
  </code></pre>
  
  <p>doesn't work... </p>
  
  <p>Excample:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.background {
    background-color: lightgrey;
    width: 400px;
    height: 300px;
  }
  
  .button {
    position: absolute;
    left: 10px;
    top: 10px;
    background-color: black;
    border-radius: 50%;
    border-width: 2px;
    border-color: white;
    width: 25px;
    height: 25px;
    color: white;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    box-shadow: none;
    outline: white;
  }
  
  .box {
    position: absolute;
    left: 20px;
    top: 20px;
    background-color: white;
    width: 200px;
    height: 100px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="background"&gt;
  &lt;div class="box"&gt;
  &lt;/div&gt;
  &lt;input type="button" class="button" value="x"&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Forum posting system force me to write something more because I have many codelines in post. But I don't know what can I write more? Everthing is on image and in code above. So I write what this forum doesn't like: "Thanks at all :-)"</p>