Make drag&drop text wrap-able

default_app/index.html

@@ -76,7 +76,11 @@
     }
 
     #holder {
+      display: flex;
+      align-items: center;
+      justify-content: center;
       margin: 0 auto;
+      padding: 10px;
       height: 275px;
       border: 1px solid #e0e5e6;
       background-color: #f6f8f8;
@@ -84,7 +88,6 @@
       border-radius: 3px;
       font-size: 30px;
       font-weight: 300;
-      line-height: 275px;
       text-align: center;
       cursor: default;
       -webkit-user-select: none;