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Absolute Horizontal And Vertical Centering In CSS

Truth. The div would need a variable height though which would change the design.

The page linked includes techniques for both variable height content (e.g. translate -50%) and fixed content.

Although this used to be a problem with CSS, it has been fixed in modern browsers: http://philipwalton.github.io/solved-by-flexbox/demos/vertic...

Now make it work across all browsers and operating systems required by your customer.

You can use viewport units in modern browsers. See here http://caniuse.com/viewport-units