Wrapped Text Background Overlapping other text on different line

Because your line-height is less and as I can see you are applying background color to your text, so increase your line-height and more over there is no unit specified, like em or px to your line-height property and btw no need of adding padding to it

Try this :

line-height:25px;

More Info: you need to give inline-block; because you are using span, you can simply use a div instead