woocommerce/plugins/woocommerce-blocks/assets/js/blocks/cart-checkout/checkout/editor.scss

.editor-styles-wrapper {
	.wp-block h4.wc-block-checkout-step__title {
		@include font-size(16px);
		line-height: 24px;
		margin: 0 $gap-small 0 0;
	}
}
.wc-block-checkout__controls-text {
	color: #999;
	font-style: italic;
}

.components-base-control--nested {
	padding-left: 52px;
	margin-top: -12px;
}

.wc-block-checkout__page-notice {
	margin: 0;
}

.components-panel__body-title .components-button {
	opacity: 1;
}