Cómo ocultar widgets usando CSS

hola buenas estoy tratando de ocultar widgets  tengo esto pero no logro ocultarlos con css

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<div class="wp-block-group"><!-- wp:paragraph -->
<p><strong>Sigueme en redes:</strong></p>
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<!-- wp:social-links {"iconColor":"white","iconColorValue":"#ffffff","iconBackgroundColor":"black","iconBackgroundColorValue":"#000000","size":"has-normal-icon-size","className":"class:boton4"} -->
<ul class="wp-block-social-links has-normal-icon-size has-icon-color has-icon-background-color class:boton4"><!-- wp:social-link {"url":"https://www.facebook.com/Mof89","service":"facebook"} /-->

<!-- wp:social-link {"url":"https://www.instagram.com/ocio_marcos/","service":"instagram"} /-->

<!-- wp:social-link {"url":"https://twitter.com/eldiariodemof","service":"twitter"} /--></ul>
<!-- wp:social-link {"url":"https://www.youtube.com/channel/UC6CtTMzlOBm923BN6RJBKJg","service":youtube"} /--></ul>
<!-- /wp:social-links -->

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<p></p>
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<form id="new_subscriber" class="simple_form form form-vertical" accept-charset="UTF-8" action="https://boletines.eldiariodemof.com/f/MXz84zpEcNU" method="post" novalidate="novalidate"><input name="utf8" type="hidden" value="✓" /><label class="control-label string optional" for="subscriber_name">Nombre requerido </label>
<input id="subscriber_name" class="form-control string optional" name="subscriber[name]" type="text" />
<div class="form-group email required subscriber_email"><label class="control-label email required" for="subscriber_email"><abbr title="Requerido"></abbr> Email requerido </label><input id="subscriber_email" class="form-control string email required" name="subscriber[email]" type="email" /></div>
<div class="form-group string optional subscriber_name"></div>
Acepto la <a href="https://eldiariodemof.com/politica-de-privacidad"><b>Politica de Privaciad</b></a>
<div class="form-group boolean optional subscriber_subscribed_with_acceptance">
<div class="checkbox"><input name="subscriber[subscribed_with_acceptance]" type="hidden" value="0" /><label class="boolean optional" for="subscriber_subscribed_with_acceptance"><input id="subscriber_subscribed_with_acceptance" class="boolean optional" name="subscriber[subscribed_with_acceptance]" type="checkbox" value="1" />Acepto</label></div>
</div>
<input id="anotheremail" style="position: absolute; left: -5000px;" tabindex="-1" autocomplete="off" name="anotheremail" type="text" />
<div class="submit-wrapper"><input class="btn btn-primary" name="commit" type="submit" value="Enviar" data-disable-with="Procesando" /></div>
</form>


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#wp-block-group__inner-container
 {
    display:none;
}


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#div.textwidget:nth-child(1)
{
    display:none;
}