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The inventor of Cascading Style Sheets (CSS), widely recognized as a cornerstone of modern web design, has played a pivotal role in shaping how information is presented online. As Chief Technology Officer at Opera Software for nearly two decades, he advanced innovations in mobile and small-screen browsing. His leadership at YesLogic continues to drive development of Prince, a CSS-based engine for high-quality PDF publishing. A dedicated advocate for open web standards, he spearheaded the Acid2 test, championed native web fonts and the video element, and consistently pushed for browser interoperability to ensure a more accessible and robust internet.