Add missing Sass file

highlighted_text/src/index.scss

@@ -0,0 +1,54 @@
+body {
+    padding: 0;
+    margin: 0;
+    font-family: "Source Sans Pro", sans-serif;
+    font-size: 1rem;
+    line-height: 1.4;
+}
+
+.highlighted-text, .status-bar {
+    color: black;
+    background-color: white;
+}
+
+.highlighted-text {
+    border: 1px solid #d2d2d2;
+    border-radius: 0 0 5px 5px;
+    padding: 4px;
+    cursor: pointer;
+
+    .token.active {
+        outline: 1px solid #444;
+    }
+
+    &.frozen {
+        .token {
+            opacity: 0.75;
+
+            &.context, &.active {
+                opacity: 1;
+            }
+
+            &.context {
+                text-decoration: #999 underline;
+            }
+        }
+    }
+}
+
+.status-bar {
+    min-height: 1.4em;
+    border: 1px solid #d2d2d2;
+    border-bottom: none;
+    border-radius: 5px 5px 0 0;
+    padding: 3px 4px;
+
+    .token {
+        border: 1px solid #aaa;
+        border-radius: 2px;
+        background: #f5f5f5;
+        padding: 1px;
+        margin: 1px;
+        margin-right: 2px;
+    }
+}