Converting small visual details from Photoshop to CSS can be a pain. What are Blend Modes? How do you convert the Photoshop Drop Shadow values to the CSS syntax? What exactly is Bevel and Emboss supposed to do, anyway?
Many of the common layer styles in Photoshop are impossible - or too time-consuming - to faithfully recreate in CSS. However, by harnessing the power of CSS Preprocessors, we can utilize functions & mixins to reduce the friction between a static comp and an interactive site without missing any of the details.