diff --git a/css/devstyles.css b/css/devstyles.css
index 8632f64..caae434 100644
--- a/css/devstyles.css
+++ b/css/devstyles.css
@@ -181,6 +181,7 @@ body.path-local-treestudyplan .editmode-switch-form > * {
 .features-treestudyplan .t-studyline.t-studyline-heading,
 .features-treestudyplan .r-studyline.r-studyline-heading {
     border-right-style: none;
+    grid-template-columns: 10px 1fr;
 }
 .path-local-treestudyplan .t-studyline.end,
 .path-local-treestudyplan .r-studyline.end,
@@ -458,6 +459,7 @@ body.path-local-treestudyplan .editmode-switch-form > * {
 }
 .path-local-treestudyplan .s-studyline-header-heading,
 .features-treestudyplan .s-studyline-header-heading {
+    white-space: nowrap;
     margin-top: 16px;
 }
 .path-local-treestudyplan .t-studyline-slot.gradable.current.even,
diff --git a/scss/studyplan.scss b/scss/studyplan.scss
index 2ba7f79..f55c974 100644
--- a/scss/studyplan.scss
+++ b/scss/studyplan.scss
@@ -81,6 +81,7 @@
     .t-studyline.t-studyline-heading,
     .r-studyline.r-studyline-heading {
         border-right-style: none;
+        grid-template-columns: 10px 1fr;
     }
 
     .t-studyline.end,
@@ -343,6 +344,7 @@
     }
 
     .s-studyline-header-heading {
+        white-space: nowrap;
         margin-top: 16px;
     }
 
diff --git a/styles.css b/styles.css
index 8632f64..caae434 100644
--- a/styles.css
+++ b/styles.css
@@ -181,6 +181,7 @@ body.path-local-treestudyplan .editmode-switch-form > * {
 .features-treestudyplan .t-studyline.t-studyline-heading,
 .features-treestudyplan .r-studyline.r-studyline-heading {
     border-right-style: none;
+    grid-template-columns: 10px 1fr;
 }
 .path-local-treestudyplan .t-studyline.end,
 .path-local-treestudyplan .r-studyline.end,
@@ -458,6 +459,7 @@ body.path-local-treestudyplan .editmode-switch-form > * {
 }
 .path-local-treestudyplan .s-studyline-header-heading,
 .features-treestudyplan .s-studyline-header-heading {
+    white-space: nowrap;
     margin-top: 16px;
 }
 .path-local-treestudyplan .t-studyline-slot.gradable.current.even,