This will give you a consistent base to work from, and will help avoid cross-browser differences.
This will make your code more readable and easier to maintain.
Inline styles are hard to maintain and can lead to specificity issues. Instead, use CSS classes.
Pre-processors will make your life easier by allowing you to use variables, mixins, and other fun features.
The shorter the selector, the faster the browser can parse it.
If you find yourself using !important a lot, chances are your CSS is too specific. Try to use more generic selectors instead.
Group related rules together so they are easy to find and maintain.
Comments will help you and others understand your code better.
Minification will reduce the file size, which can help improve loading times.
Linters will help you catch errors and enforce coding standards. They can be a valuable tool in your workflow.
By following these best practices, you’ll end up with cleaner, more maintainable CSS code. Your team will thank you for it!