consistently use background instead of background-color in header

diff --git a/src/css/header.css b/src/css/header.css
index 6b10e14..b486e86 100644 (file)
--- a/src/css/header.css
+++ b/src/css/header.css
@@ -167,7 +167,7 @@ body {
 
   .navbar-menu a.navbar-item:hover,
   .navbar-menu .navbar-link:hover {
-    background-color: var(--navbar-menu_hover-background);
+    background: var(--navbar-menu_hover-background);
   }
 }
 
@@ -221,7 +221,7 @@ body {
   }
 
   .navbar-dropdown {
-    background-color: var(--navbar-menu-background);
+    background: var(--navbar-menu-background);
     border: 1px solid var(--navbar-menu-border-color);
     border-top: none;
     border-radius: 0 0 0.25rem 0.25rem;
@@ -251,7 +251,7 @@ body {
   }
 
   .navbar-dropdown a.navbar-item:hover {
-    background-color: var(--navbar-menu_hover-background);
+    background: var(--navbar-menu_hover-background);
   }
 }