fixed button focus

assets/sass/_theme/design-system/footer.sass

@@ -75,10 +75,11 @@ footer#document-footer
                     left: 0
                     margin-top: px2rem(17)
                     max-height: calc(100vh - var(--header-height))
-                    overflow: auto
                     padding: 0
                     position: absolute
                     width: fit-content
+                    a:focus-visible
+                        outline-offset: -1px
 
         @if $footer-icons-enabled
             &-social