Block editor CSS issue

Insert Pages causes CSS issues in the block editor for other blocks. The following code in both index.css and block.css causes stretched out inputs when width-100 is applied (for example with Genesis Custom Blocks):

// Constrain the URLInput field in the InspectorControls sidebar.
.width-100,
.width-100 input {
	width: 100% !important;
}

I would suggest to make this CSS line Insert Page block specific.