style.scss

.block-editor-block-inspector {
	p:not(.components-base-control__help) {
		margin-top: 0;
	}

	h2,
	h3 {
		font-size: $default-font-size;
		color: $gray-900;
		margin-bottom: 1.5em;
	}

	.components-base-control {
		margin-bottom: #{ $grid-unit-30 };

		&:last-child {
			margin-bottom: $grid-unit-10;
		}
	}

	// Reset unwanted margin-bottom from being applied to BaseControls within certain components.
	.components-focal-point-picker-control,
	.components-query-controls,
	.components-range-control {
		.components-base-control {
			margin-bottom: 0;
		}
	}

	.components-panel__body {
		border: none;
		border-top: $border-width solid $gray-200;

		// Ensures this PanelBody is treated like the ToolsPanel, removing double borders.
		margin-top: -$border-width;
	}
}

.block-editor-block-inspector__no-blocks,
.block-editor-block-inspector__no-block-tools {
	display: block;
	font-size: $default-font-size;
	background: $white;
	padding: ($grid-unit-20 * 2) $grid-unit-20;
	text-align: center;
}

.block-editor-block-inspector__no-block-tools {
	border-top: $border-width solid $gray-300;
}

.block-editor-block-inspector__tab-item {
	flex: 1 1 0px;
}