title: Input radio checking
body: <p>I'm trying to set the Input called iva displayed only when #azienda is selected but i don't understand why the code just doesn't set the display to block
  This is the code:</p>
  <pre><code>&lt;style&gt;
      .iva {
          display: none;
      }
  
      #azienda:checked~#iva {
          display: block;
      }
  &lt;/style&gt;
   
  
   &lt;div class=&quot;rad&quot;&gt;
          &lt;input type=&quot;radio&quot; id=&quot;azienda&quot; name=&quot;radio&quot; value=&quot;Azienda/Impresa/Società&quot;&gt;
          &lt;label for=&quot;azienda&quot;&gt; Azienda/Impresa/Società &lt;/label&gt;
  
   &lt;/div&gt;
   &lt;input type=&quot;number&quot; class=&quot;iva&quot; name=&quot;iva&quot; id=&quot;iva&quot; placeholder=&quot;Inserire P.IVA...&quot;&gt;
  </code></pre>
  <p>I'll give an hug at everyone who will help me please</p>