Add padding to search input

src/main/webapp/app/search-input/search-input.component.html

-<div>
+<div class="card-container">
     <h2 class="display-4" jhiTranslate="search.title">Welcome!</h2>
 
     <span jhiTranslate="search.usage">The search mask allows you to search for full texts in the sharing platform based on various search criteria (e.g., full-text search, programming languages, keywords, etc.). Boolean operators can be used in the search mask for full texts. Apart from the full-text search, no further fields are to be specified.</span>&nbsp;
     <ng-container [queryParamGroup]="paramGroup">
-        <div class="col-sm-12">
+        <div>
             <form name="searchForm" class="form-inline">
                 <div class="input-group w-100 mt-3">
                     <input type="text" class="form-control" queryParamName="searchText"
@@ -12,7 +12,7 @@
             </form>
         </div>
 
-        <div class="col-sm-12">
+        <div>
             <form name="searchForm" class="form-inline">
                 <div class="input-group w-100 mt-3">
                     <input type="text" class="form-control" queryParamName="programmingLanguage"
@@ -20,7 +20,8 @@
                 </div>
             </form>
         </div>
-        <div class="col-sm-12">
+
+        <div>
             <form name="searchForm" class="form-inline">
                 <div class="input-group w-100 mt-3">
                     <input type="text" class="form-control" queryParamName="keyword"
@@ -28,7 +29,8 @@
                 </div>
             </form>
         </div>
-        <div class="col-sm-12">
+
+        <div>
             <form name="searchForm" class="form-inline">
                 <div class="input-group w-100 mt-3">
                     <input type="text" class="form-control" queryParamName="author"
@@ -36,7 +38,8 @@
                 </div>
             </form>
         </div>
-        <div class="col-sm-12">
+
+        <div>
             <form name="searchForm" class="form-inline">
                 <div class="input-group w-100 mt-3">
                     <input type="text" class="form-control" queryParamName="license"

src/main/webapp/app/search-input/search-input.component.scss

+.card-container {
+  padding: 20px;
+}