diff --git a/app/assets/stylesheets/problems.css b/app/assets/stylesheets/problems.css
new file mode 100644
--- /dev/null
+++ b/app/assets/stylesheets/problems.css
@@ -0,0 +1,14 @@
+
+tr.available {
+    background: #c0ffc0;
+}
+
+tr.not-available {
+    background: #ffc0c0;
+}
+
+.import-log {
+    background: lightgray;
+    border: solid black 1px;
+    padding: 10px;
+}
\ No newline at end of file