move css logic to global css file as it makes more sense

BTCPayServer/Views/Stores/UpdateStore.cshtml

@@ -4,19 +4,6 @@
     ViewData.SetActivePageAndTitle(StoreNavPages.Index, "Profile");
 }
 
-<style type="text/css">
-    .smMaxWidth {
-        max-width: 150px;
-    }
-
-    @@media (min-width: 768px) {
-        .smMaxWidth {
-            max-width: 300px;
-        }
-    }
-</style>
-
-
 <partial name="_StatusMessage" for="@TempData["TempDataProperty-StatusMessage"]" />
 
 <div class="row">

BTCPayServer/wwwroot/main/css/site.css

@@ -118,4 +118,14 @@ a.nav-link {
 .invoice-details a{
     /* Prevent layout from breaking on hyperlinks with very long URLs as the visible text */
     word-break: break-word;
-}
+}
+
+.smMaxWidth {
+    max-width: 150px;
+}
+
+@media (min-width: 768px) {
+    .smMaxWidth {
+        max-width: 300px;
+    }
+}