I created an account on “CSS Battles”, And I was curious about the answer of the highest score in the first battle," Battle #1 - Pilot Battle #1 - Simply Square" The code was like that :
<img style=box-shadow:0+0+0+2in#b5e0ba,0+0+0+5in#5d3a3a>
Which creates a square that looks like this :
So what does the code mean? and how to learn advanced things like that?
And what search keywords should I use to look these things out in google ?