Client - update input style on validation error

fittrackee_client/src/scss/base.scss

@@ -39,6 +39,12 @@ input, textarea, select {
   }
 }
 
+form.errors {
+  :invalid {
+    outline: 2px solid var(--input-error-color);
+  }
+}
+
 label {
   font-weight: bold;
 }

fittrackee_client/src/scss/colors.scss

@@ -20,6 +20,7 @@
   --card-border-color: #c4c7cf;
   --input-border-color: #9da3af;
   --input-bg-color: #FFFFFF;
+  --input-error-color: #dc3545;
   --dropdown-hover-color: #eff0f5;
 
   --custom-checkbox-border-color: #9da3af;