🔗 Modern CSS theming with light-dark(), contrast-color(), and style queries

This article dives into a novel dynamic theming system using new CSS features. It introduces light-dark() for switching between light and dark color schemes based on user preferences, while contrast-color() ensures optimal text visibility against varying backgrounds. The author combines these functions with @container style() to create customizable color palettes, enhancing both accessibility and aesthetics. Practical examples illustrate how to implement shadows in light mode and glowing borders in dark mode, ensuring that UI elements are visually appealing and readable irrespective of the theme. This innovative approach allows developers to craft intricate themes that respect user settings while providing a fluid user experience. Everything is browser-compatible as of May 2026, making this a timely exploration into modern CSS capabilities.