CSS

The different browsers today are pretty forgiving when it comes to HTML and CSS. They have become good at rendering the markup, even if it‘s invalid HTML and will cause HTML validation to fail. While we should always strive to write valid HTML markup, mistakes do happen, and luckily the browsers do a pretty good job at rendering the code without breaking the layout completely. But, we still have invalid HTML, and our goal was to address these issues by making a low-level HTML markup quality assurance tool with CSS.