Explore advanced CSS techniques for recreating subtle design details using Sass in this 20-minute conference talk from CSSConfUS 2013. Dive into topics such as extending placeholders, manipulating color lightness, implementing background color design logic, and creating layer styles. Learn how to craft intricate drop shadows using trigonometry, master Compass box shadows, and apply drop shadows and text shadows to buttons. Discover the art of linear gradients, including angle conversion and scaling techniques. Experiment with psychedelic linear grain effects and plot twists. Understand blend modes, their limitations, and how to implement gradient overlay conversions. Gain insights into refactoring and styling buttons efficiently. This talk provides a comprehensive toolkit for developers looking to elevate their CSS skills and achieve pixel-perfect designs.