Sneaky Header Blocker Trick
Summary
The article explains a CSS-only technique for a 'sneaky' header blocker effect that makes the header background appear differently as you scroll. It uses two behind-the-header blockers (one in the hero, one in the main content) with sticky positioning to create a seamless transition between header states without JavaScript. The post includes interactive demos, code playgrounds, and design notes about spacing, layering, and trade-offs, plus discussions on adapting the effect for the homepage.