use variable to set width and height of nav toggle button in toolbar

diff --git a/src/css/toolbar.css b/src/css/toolbar.css
index fe3cc5b..7f38488 100644 (file)
--- a/src/css/toolbar.css
+++ b/src/css/toolbar.css
@@ -22,9 +22,9 @@
   border: none;
   outline: none;
   line-height: inherit;
-  height: 2.5rem;
   padding: 0;
-  width: 2.5rem;
+  height: var(--toolbar-height);
+  width: var(--toolbar-height);
   margin-right: -0.25rem;
 }