Imagine you're building a site for a client, a small mom-and-pop store, that only has two pages. That's not a lot. So when you finish working on the landing page and start on the contact page, you just create a new HTML file and copy over all the cod...

What is Margin Collapse? Margin collapse occurs when vertically adjacent margins of block-level elements collide to share a general margin space. The size of this shared space is dictated by the larger number margin. You can visualize this as an arm...