woocommerce/plugins/woocommerce-admin/client/homescreen/stats-overview/style.scss

// Set up some local color variables to make the CSS more clear
$outer-border: $gray-200;
$promo-actions-border-top: $gray-100;
$promo-actions-border-bottom: $gray-100;

.woocommerce-stats-overview {
	.woocommerce-card__body {
		padding: 0;
	}
	.woocommerce-summary {
		margin: 0;
	}
}

.woocommerce-stats-overview__more-btn {
	display: inline-block;
	padding: $gap;
}

.woocommerce-stats-overview__tabs {
	.components-tab-panel__tabs {
		display: flex;
		justify-content: space-between;
		border-bottom: 1px solid $outer-border;

		.components-button {
			width: 33.33%;
			padding-right: $gap-large;
			padding-left: $gap-large;
		}
	}
}

.woocommerce-stats-overview__stats {
	margin: 0;

	.woocommerce-summary__item-container {
		width: 50%;
		display: inline-block;
	}

	.woocommerce-summary__item-container:nth-last-of-type(1)
	.woocommerce-summary__item {
		border-bottom: none;
	}

	&.is-even
	.woocommerce-summary__item-container:nth-last-of-type(2)
	.woocommerce-summary__item {
		border-bottom: none;
	}

	.woocommerce-summary__item-container:nth-of-type(even)
	.woocommerce-summary__item {
		border-right: none;
	}

	.woocommerce-summary__item {
		background-color: $studio-white;

		&:hover {
			background-color: $gray-100;
		}

		&:active {
			background-color: $gray-100;
		}
	}
}

article.woocommerce-stats-overview__install-jetpack-promo {
	.woocommerce-stats-overview__install-jetpack-promo__content {
		padding: $gap $gap-large;
	}

	h2 {
		color: $gray-900;
		@include font-size( 16 );
		font-style: normal;
		line-height: 1.5;
		font-weight: normal;
		margin: $gap-smaller 0;
	}
	p {
		color: $gray-700;
		font-style: normal;
		font-weight: normal;
		@include font-size( 14 );
		line-height: 20px;
		margin: $gap-smaller 0;
	}
	footer {
		padding: $gap $gap-large;
		border-top: 1px solid $promo-actions-border-top;
		border-bottom: 1px solid $promo-actions-border-bottom;

		button {
			margin-left: $gap-smaller;

			&:first-child {
				margin-left: 0;
			}
		}
	}
}