::first-line pseudo-element

This very long paragraph should have a first line with green background. This very long paragraph should have a first line with green background. This very long paragraph should have a first line with green background. This very long paragraph should have a first line with green background. This very long paragraph should have a first line with green background. This very long paragraph should have a first line with green background. This very long paragraph should have a first line with green background.