Surface styles

wax-prosemirror-services/src/EssayService/essay.css

+  /* -- Essay ---------------------------------- */
+  .essay {
+    border: 3px solid #f5f5f7;
+    margin-bottom: 30px;
+    margin-top: 30px;
+    padding: 3px;
+  }
+
+  essay::before {
+   background-color: #fff;
+   bottom: 22px;
+   color: #535e76;
+   content: 'Essay';
+   height: 10px;
+   left: -1px;
+   position: relative;
+   width: 30px;   
+  }
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