Update card variants

- Remove background-color from header and footer in inverse cards (fixes #19841)
- Update border override for header and footer in cards; only need to declare a new color
- Update the selector for targetting blockquote footers in cards

1 files changed, 7 insertions, 2 deletions

diff --git a/scss/mixins/_cards.scss b/scss/mixins/_cards.scss
index 1ce28f1ce..bad98327d 100644
--- a/scss/mixins/_cards.scss
+++ b/scss/mixins/_cards.scss
@@ -3,6 +3,11 @@
 @mixin card-variant($background, $border) {
   background-color: $background;
   border-color: $border;
+
+  .card-header,
+  .card-footer {
+    background-color: transparent;
+  }
 }
 
 @mixin card-outline-variant($color) {
@@ -17,7 +22,7 @@
 @mixin card-inverse {
   .card-header,
   .card-footer {
-    border-bottom: $card-border-width solid rgba(255,255,255,.2);
+    border-color: rgba(255,255,255,.2);
   }
   .card-header,
   .card-footer,
@@ -27,7 +32,7 @@
   }
   .card-link,
   .card-text,
-  .card-blockquote > footer {
+  .card-blockquote .blockquote-footer {
     color: rgba(255,255,255,.65);
   }
   .card-link {