Update styles and some part7 stuff

part8/README.md

@@ -16,10 +16,3 @@ to fail; in that case, just run `elm package install` again.)
 elm live Main.elm --open -- --output=elm.js
 ```
 
-## Running Tests
-
-```bash
-cd test
-elm package install
-elm test TestRunner.elm
-```

part8/style.css

@@ -90,3 +90,12 @@ a:hover {
 button:focus, input:focus {
   outline: none;
 }
+
+.error {
+  background-color: #FF9632;
+  padding: 20px;
+  box-sizing: border-box;
+  overflow-x: auto;
+  font-family: monospace;
+  font-size: 18px;
+}