diff --git a/css/core.css b/css/core.css
index 0f29a6c..a7fc088 100644
--- a/css/core.css
+++ b/css/core.css
@@ -238,4 +238,14 @@ select {
 
 .active {
     color: red;
+}
+
+button {
+    margin: 5px;
+    padding: 10px;
+    font-size: 14px;
+}
+
+.warn {
+    background-color: #ff8175;
 }
\ No newline at end of file