CSS revolutionised web development, <font> and <table> were a nightmare in comparison.
But still there are times when CSS feels very limited, if you want to change a colour or margin size and have to hunt through the CSS to calculate the related changes.
But now there is
Which looks like it fills in some of the missing gaps - it extends the CSS syntax and to it’s own format - and then generates standard CSS from this.
I’m definitely planning on using this for my next project.