title: apply CSS for the first label of div
body: <p>i would like to apply a specific css to a specific label in my html
  this is my HTML</p>
  
  <pre><code>&lt;div id="registration"&gt;
      &lt;div&gt;
          &lt;label&gt;Localisation&lt;/label&gt;**//this is the target label to apply css** 
          &lt;div id="registration_localisation"&gt;
              &lt;div&gt;
                  &lt;label&gt;Gouvernorat&lt;/label&gt;
                  &lt;select id="registration_localisation_gouvernorat"&gt;
                    &lt;option value="1"&gt;Ariana&lt;/option&gt;
                    &lt;option value="2"&gt;Ben Arous&lt;/option&gt;
                    &lt;option value="3"&gt;Bizerte&lt;/option&gt;
                 &lt;/select&gt;
                  &lt;/div&gt;
                   &lt;div&gt;
                  &lt;label for="registration_localisation_ville"&gt;Ville&lt;/label&gt;
                  &lt;input type="text" id="registration_localisation_ville"&gt;
                   &lt;/div&gt;
                 &lt;/div&gt;
           &lt;/div&gt;
           &lt;div&gt;
          &lt;label&gt;Annonceur&lt;/label&gt;**//this is the target label to apply the css** 
          &lt;div id="registration_annonceur"&gt;
              &lt;div&gt;
                  &lt;label for="registration_annonceur_Nom"&gt;Nom&lt;/label&gt;
                  &lt;input type="text" id="registration_annonceur_Nom"&gt;
              &lt;/div&gt;
              &lt;div&gt;
                  &lt;label for="registration_annonceur_Email"&gt;Email&lt;/label&gt;
                  &lt;input type="text" id="registration_annonceur_Email"&gt;
              &lt;/div&gt;
              &lt;div&gt;
                  &lt;label for="registration_Telephone" &gt;Telephone&lt;/label&gt;
                  &lt;input type="text" id="registration_annonceur_Telephone"&gt;
              &lt;/div&gt;
          &lt;/div&gt;
           &lt;/div&gt;
  
  &lt;/div&gt;
  </code></pre>
  
  <p>i used many pseudo classes but i didn't find any solution 
  any idea please ?</p>