diff --git a/app/assets/stylesheets/actiontext-lexical.css b/app/assets/stylesheets/actiontext-lexical.css
index 63952a8da..c84a3d954 100644
--- a/app/assets/stylesheets/actiontext-lexical.css
+++ b/app/assets/stylesheets/actiontext-lexical.css
@@ -146,6 +146,36 @@
     }
   }
 
+  .lexical-code-language-picker {
+    /* Based on .input, .input--select */
+    -webkit-appearance: none;
+    appearance: none;
+    background-color: var(--color-canvas);
+    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='m12 19.5c-.7 0-1.3-.3-1.7-.8l-9.8-11.1c-.7-.8-.6-1.9.2-2.6.8-.6 1.9-.6 2.5.2l8.6 9.8c0 .1.2.1.4 0l8.6-9.8c.7-.8 1.8-.9 2.6-.2s.9 1.8.2 2.6l-9.8 11.1c-.4.5-1.1.8-1.7.8z' fill='%23000'/%3E%3C/svg%3E");
+    background-position: center right 0.9em;
+    background-repeat: no-repeat;
+    background-size: 0.5em;
+    border: 1px solid var(--color-ink-lighter);
+    border-radius: 0.3em;
+    color: var(--color-ink);
+    font-family: var(--font-mono);
+    font-size: var(--text-x-small);
+    font-weight: 500;
+    line-height: inherit;
+    margin: 0.3em 0.3em 0 -0.3em;
+    padding: 0.5em 1.8em 0.5em 1.2em;
+    text-align: start;
+
+    @media (prefers-color-scheme: dark) {
+      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='m12 19.5c-.7 0-1.3-.3-1.7-.8l-9.8-11.1c-.7-.8-.6-1.9.2-2.6.8-.6 1.9-.6 2.5.2l8.6 9.8c0 .1.2.1.4 0l8.6-9.8c.7-.8 1.8-.9 2.6-.2s.9 1.8.2 2.6l-9.8 11.1c-.4.5-1.1.8-1.7.8z' fill='%23fff'/%3E%3C/svg%3E");
+    }
+
+    option {
+      background-color: var(--color-canvas);
+      color: var(--color-ink);
+    }
+  }
+
   /* Prompt
   /* ------------------------------------------------------------------------ */