Keep left, image column narrow-ish

agaric/templates/layout/node--teaser.html.twig

@@ -84,7 +84,7 @@
 {% endif %}
 
 {% if not has_title_paragraph %}
-  <div class="media-left column">
+  <div class="media-left column is-one-third is-one-quarter-desktop">
     {{ content.field_image }}
     {% if node.bundle == 'blog' and content.field_authors is not empty %}
       <p class="byline is-mono">
@@ -93,7 +93,7 @@
       </p>
     {% endif %}
   </div>
-  <div class="media-content content column">
+  <div class="media-content content column is-two-thirds is-three-quarters-desktop ">
     <h3 class="title is-5">{{ label }}</h3>
     <div class="subtitle is-6">
       {{ content.field_summary }}