Refactor ProspectGrid styles: remove custom width variables and simplify grid layout for improved clarity

FoodsharingSiegen.Server/Controls/ProspectGrid.razor.css

@@ -1,17 +1,8 @@
 .prospect-grid {
-    /* Default card width range. Override via a modifier class on ProspectGrid. */
-    --pc-min-width: 320px;
-    --pc-max-width: 320px;
-
     display: grid;
     gap: 1rem;
     width: 100%;
-    grid-template-columns: repeat(auto-fit, minmax(var(--pc-min-width), 1fr));
-    justify-items: center;
+    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
+    justify-content: center;
     align-items: stretch;
 }
-
-.prospect-grid > * {
-    width: 100%;
-    max-width: var(--pc-max-width);
-}

FoodsharingSiegen.Server/Controls/ProspectSortControl.razor

@@ -10,7 +10,7 @@
         <i class="fa-solid fa-sort"></i>
     </Button>
 
-    <Button Color="Color.Primary"
+    <Button Color="Color.Info"
             Width="Width.Px(50)"
             Height="Height.Px(50)"
             title="Filtern"