small changes

com.unity.perception/Editor/Randomization/Uss/Styles.uss

     background-image: resource("Packages/com.unity.perception/Editor/Icons/ChevronRight.png");
 }
 
-.title-label {
-    -unity-font-style: bold;
-    margin-bottom: 5px;
-    color: #CACACA;
-}
-
 /* Scenario classes */
 .scenario__info-box {
     border-width: 1px;
     white-space: normal;
-    margin-top: 4px;
-    margin-bottom: 4px;
+    margin: 3px 3px 3px 3px;
 }
 
 .scenario__dark-viewport {
 }
 
+.scenario__title-label {
+    -unity-font-style: bold;
+    margin: 3px 3px 3px 3px;
+    color: #CACACA;
+}
 
 /* Randomizer classes */
 .randomizer__drag-bar {

com.unity.perception/Editor/Randomization/Uxml/Randomizer/RandomizerList.uxml

 <UXML xmlns="UnityEngine.UIElements">
     <VisualElement style="min-height: 132px;">
         <VisualElement class="scenario__dark-viewport">
-            <TextElement text="Randomizers" class="title-label" style="margin-left: 3px; margin-top:3px"/>
+            <TextElement text="Randomizers" class="scenario__title-label"/>
-                text="Randomizers are executed in the order below. You can change the order by dragging Randomizers up or down using the handle bar to their left."
-                style="margin-left: 3px; margin-right: 3px; margin-top: 3px"/>
+                text="Randomizers are executed in the order below. You can change the order by dragging Randomizers up or down using the handle bar to their left."/>
             <VisualElement name="randomizers-container" style="margin-top: 3px; min-height: 100px;"/>
             <VisualElement style="flex-direction: row; align-items: center; justify-content: center; margin-top: 2px;">
                 <Button name="add-randomizer-button" text="Add Randomizer"/>

com.unity.perception/Editor/Randomization/Uxml/ScenarioBaseElement.uxml

 <UXML xmlns="UnityEngine.UIElements" xmlns:editor="UnityEditor.UIElements">
     <VisualElement>
         <Style src="../Uss/Styles.uss"/>
-        <TextElement
-            class="scenario__info-box"
-            text="Scenarios control the execution flow of your simulation by applying randomization parameters. Make sure to always have only one scenario active within your scene."/>
-            <TextElement text="Scenario Properties" class="title-label" style="margin-left: 3px; margin-top:3px"/>
-            <Toggle label="Quit On Complete" tooltip="Quit the application when the scenario completes" binding-path="quitOnComplete" style="margin-top:2px"/>
+            <TextElement text="Scenario Properties" class="scenario__title-label"/>
+            <TextElement
+                class="scenario__info-box"
+                text="Scenarios control the execution flow of your simulation by applying randomization parameters. Make sure to always have only one scenario active within your scene."/>
+            <Toggle label="Quit On Complete" tooltip="Quit the application when the scenario completes" binding-path="quitOnComplete" style="margin-top:5px"/>
             <VisualElement name="constants-container">
                 <Foldout style="padding-left: 16px" text="Constants" name="constants-list" tooltip="A list of parameters for this scenario that will be JSON serialized in the configuration file."/>
                 <editor:PropertyField name="configuration-file-name" label="Constants File Name" binding-path="serializedConstantsFileName"/>