Merge pull request #145 from DoubleML/s-inrc-dev

fix panel icon for darkmode

Author: SvenKlaassen

doc/index.rst

@@ -38,7 +38,7 @@ ecosystem <https://github.com/mlr-org/mlr3/wiki/Extension-Packages>`_ (Lang et a
     .. grid-item-card::
         :columns: 4
         :img-top: _static/light_gettingstarted.png
-        :class-img-top: p-5
+        :class-img-top: p-5 panel-icon
         :link: intro
         :link-type: ref
         :text-align: center
@@ -53,7 +53,7 @@ ecosystem <https://github.com/mlr-org/mlr3/wiki/Extension-Packages>`_ (Lang et a
     .. grid-item-card::
         :columns: 4
         :img-top: _static/light_workflow.png
-        :class-img-top: p-5
+        :class-img-top: p-5 panel-icon
         :link: workflow
         :link-type: ref
         :text-align: center
@@ -67,7 +67,7 @@ ecosystem <https://github.com/mlr-org/mlr3/wiki/Extension-Packages>`_ (Lang et a
     .. grid-item-card::
         :columns: 4
         :img-top: _static/light_userguide.png
-        :class-img-top: p-5
+        :class-img-top: p-5 panel-icon
         :link: guide
         :link-type: ref
         :text-align: center
@@ -83,7 +83,7 @@ ecosystem <https://github.com/mlr-org/mlr3/wiki/Extension-Packages>`_ (Lang et a
     .. grid-item-card:: 
         :columns: 4
         :img-top: _static/light_pythonapi.png
-        :class-img-top: p-5
+        :class-img-top: p-5 panel-icon
         :link: python_api
         :link-type: ref
         :text-align: center
@@ -98,7 +98,7 @@ ecosystem <https://github.com/mlr-org/mlr3/wiki/Extension-Packages>`_ (Lang et a
     .. grid-item-card:: 
         :columns: 4
         :img-top: _static/light_rapi.png
-        :class-img-top: p-5
+        :class-img-top: p-5 panel-icon
         :link: https://docs.doubleml.org/r/stable/
         :text-align: center
         :class-header: sd-font-weight-bold h4
@@ -111,7 +111,7 @@ ecosystem <https://github.com/mlr-org/mlr3/wiki/Extension-Packages>`_ (Lang et a
     .. grid-item-card::
         :columns: 4
         :img-top: _static/light_examplegallery.png
-        :class-img-top: p-5
+        :class-img-top: p-5 panel-icon
         :link: examplegallery
         :link-type: ref
         :text-align: center