woocommerce/plugins/woocommerce-admin/client/homescreen/welcome-modal/style.scss

// The welcome modal is presented outside the homescreen class namespace
.components-guide.woocommerce__welcome-modal {
	max-width: 517px;
	height: 460px;

	.components-modal__header {
		height: 0;

		.components-button {
			color: $white;
		}
	}

	.components-guide__container {
		margin-top: 0;

		.woocommerce__welcome-modal__page-content {
			padding: 0 24px;

			.woocommerce__welcome-modal__page-content__header {
				font-size: 24px;
				line-height: 32px;
				margin: 0 0 24px 0;
			}

			.woocommerce__welcome-modal__page-content__body {
				font-size: 16px;
				line-height: 24px;
				margin: 0 0 24px 0;
			}
		}
	}

	.components-guide__footer {
		padding: 0;
		margin: 0 24px 24px 24px;
		justify-content: flex-end;
		width: initial;

		.components-guide__finish-button,
		.components-guide__forward-button,
		.components-guide__back-button {
			position: initial;
			padding: 10px 16px;
			font-weight: 500;
			font-size: 14px;
			line-height: 18px;
		}

		.components-guide__forward-button,
		.components-guide__back-button {
			color: var(--wp-admin-theme-color);
		}

		.components-guide__forward-button,
		.components-guide__finish-button {
			margin-left: 10px;
		}

		.components-guide__forward-button {
			box-shadow: inset 0 0 0 1px var(--wp-admin-theme-color);
			outline: 1px solid transparent;
		}
	}

	.fill-theme-color {
		fill: var(--wp-admin-theme-color);
	}
}