+++ b/sass/_sidebar.scss
@@ -108,6 +86,39 @@
+ color: #fff;

Use variab...

1. +++ b/sass/_sidebar.scss @@ -108,6 +86,39 @@ + color: #fff;

   Use variables for this please

2. +++ b/sass/_sidebar.scss @@ -108,6 +86,39 @@ + opacity: 0;

   Use Sass method for opacity

3. +++ b/sass/_sidebar.scss @@ -108,6 +86,39 @@ + opacity: 1;

   Use sass method for opacity

EDIT:
Removed the CSS change suggestions as those are all compiled code.