Fix: Fix sidebar size

Author: pkiop

frontend/assets/scss/variables.scss

@@ -20,6 +20,6 @@ $main-radius: 0.4rem;
 
 $header-height: 3rem;
 $footer-height: $header-height;
-$sidebar-width: 16rem;
+$sidebar-width: 12rem;
 $title-font-size: 3rem;
 $title-bottom-padding: 2rem;