.card-tab-group {
	.card-tab:nth-child(n+2) {
		border-left: $card-tab-border-left-width solid $card-tab-border-left-color;
		padding-left: $card-tab-padding-left-width;

		.card-tab {
			border-left: $card-tab-border-left-width solid lighten($card-tab-border-left-color, 10%);
			padding-left: $card-tab-padding-left-width;

			.card-tab {
				border-left-color: lighten($card-tab-border-left-color, 20%);
			}
		}
	}
}