Style dividers

app/assets/stylesheets/rich-text-content.css

@@ -61,6 +61,17 @@
       display: none;
     }
 
+    :where(hr) {
+      block-size: 0;
+      border-block-end: 1px solid currentColor;
+      inline-size: 20%;
+      margin: var(--block-margin) 0;
+    }
+
+    .horizontal-divider  {
+      margin-inline: 0;
+    }
+
     .lexxy-content__strikethrough {
       text-decoration: line-through;
     }