Title: Customizer CSS classes not working
Last modified: January 31, 2021

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# Customizer CSS classes not working

 *  Resolved [emiliohurt](https://wordpress.org/support/users/emiliohurt/)
 * (@emiliohurt)
 * [5 years, 2 months ago](https://wordpress.org/support/topic/customizer-css-classes-not-working/)
 * I am trying to change the single product page by making the variation labels 
   bold, using the custom CSS on my site´s “customizer”. I have added additional
   code in this space before, and it has given me no problem. However it has been
   a few days now and CSS code I have been adding on this section appears in red
   color, as if the classes I am targeting did not exist, or as if there was an 
   error with them, therefore there is no change on my site when I add code here.
   Code I am trying to add is the following:
 * .woocommerce div.product form.cart .variations label {
    font-weight: bold; }
 * Does anyone know why this is happening? I have read in other forums that it may
   be due to the instalation of a new plugin, but I have not installed any lately.
   However, I have updated some of them recently. Help!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcustomizer-css-classes-not-working%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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## Tags

 * [classes](https://wordpress.org/support/topic-tag/classes/)
 * [code](https://wordpress.org/support/topic-tag/code/)

 * 0 replies
 * 1 participant
 * Last reply from: [emiliohurt](https://wordpress.org/support/users/emiliohurt/)
 * Last activity: [5 years, 2 months ago](https://wordpress.org/support/topic/customizer-css-classes-not-working/)
 * Status: resolved