To build really good buttons, you need to understand the CSS concept of Psuedo-Classes. These allow you to modify the behavior of a tag based on different inputs.
You can also change the way normal links work using pseudo classes.
this link to Youtube will demonstrate a few of those options.Overflow is what happens when content cannot fit within the space it has been provided.
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Lorem ipsum dolor sit, amet consectetur adipisicing elit. Esse perferendis placeat pariatur autem veritatis quidem blanditiis rem enim aliquam illo. Quam, commodi obcaecati mollitia natus facere id dolore exercitationem voluptatem?