Styles for the new instructor grading interface

lms/static/sass/course/_staff_grading.scss

@@ -26,4 +26,39 @@ div.staff-grading {
     input[name='score-selection'] {
         display: none;
     }
+
+    .prompt-information-container,
+    .submission-wrapper,
+    .rubric-wrapper,
+    .grading-container
+    {
+        border: 1px solid gray;
+        padding: 15px;
+    }
+    .error-container
+    {
+        background-color: $error-red;
+    }
+    .ml-error-info-container,
+    {
+        background-color: #eee;
+        padding:15px;
+        margin-left:0px;
+    }
+    .message-container
+    {
+        background-color: $yellow;
+        padding: 10px;
+        margin-left:0px;
+    }
+    
+    .breadcrumbs
+    {
+        margin-top:20px;
+        margin-left:0px;
+        margin-bottom:5px;
+        font-size: .8em;
+    }
+    
+    padding: 40px;
 }