diff --git a/public/css/app.css b/public/css/app.css
index ef1f65f..11277ca 100644
--- a/public/css/app.css
+++ b/public/css/app.css
@@ -20,6 +20,11 @@ input.checkbox-input {
     display: none;
 }
 
+/* some selects are empty (e.g. before activating conditional options) */
+.select select[multiple] {
+    min-width: 10rem;
+}
+
 /** Tooltips */
 
 
@@ -295,3 +300,16 @@ div.label-smaller {
         border-radius: 0.25rem;
     }
 }
+
+/**
+ ** Bulma overrides
+ */
+.select fieldset[disabled] select,
+.select select[disabled],
+[disabled].input,
+[disabled].textarea,
+fieldset[disabled] .input,
+fieldset[disabled] .select select,
+fieldset[disabled] .textarea {
+    background-color: var(--bulma-input-disabled-placeholder-color);
+}
diff --git a/public/js/tooltip.js b/public/js/tooltip.js
index 95360d2..e9471d5 100644
--- a/public/js/tooltip.js
+++ b/public/js/tooltip.js
@@ -5,7 +5,7 @@ export function tooltips() {
     Array.from(document.querySelectorAll('.with-tooltip .control button.tooltip-button')).forEach(function(elem) {
         const prev = elem.previousElementSibling;
         const headlines = ['H1', 'H2', 'H3', 'H4', 'H5', 'H6'];
-        if (headlines.includes(prev.tagName)) {
+        if (prev && headlines.includes(prev.tagName)) {
             prev.appendChild(elem);
         }
     });