PR feedback: Fix flex issue on mobile

Author: jlchilders11

static/css/v3/card.css

@@ -70,6 +70,7 @@
 .card__hr {
   width: 100%;
   height: 1px;
+  min-height: 1px;
   background: var(--color-stroke-weak);
   border: none;
   margin: 0;