When implementing the sticky footer, the footer and the push div should have the same height. Additionally, the wrapper requires a margin-bottom to be the negative value of the height of the footer/push.

Example: If the footer height = 100px, the push height = 100px and the wrapper margin-bottom = -100px.

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Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

I'm the push. I make sure that the footer never pushes into the content area when the browser window is smaller than full content height, ensuring the footer stays below the content. Normally transparent so I blend in seamlessly to the design of the site.