$card-deck-margin;\n    }\n  }\n}\n\n\n//\n// Card groups\n//\n\n.card-group {\n  display: flex;\n  flex-direction: column;\n\n  // The child selector allows nested `.card` within `.card-group`\n  // to display properly.\n  > .card {\n    margin-bottom: $card-group-margin;\n  }\n\n  @include media-breakpoint-up(sm) {\n    flex-flow: row wrap;\n    // The child selector allows nested `.card` within `.card-group`\n    // to display properly.\n    > .card {\n      // Flexbugs #4: https://github.com/philip...