How Do Browsers Render the Different CSS Border Style Values? - Impressive Webs
internet explorer - How to fix IE rendering of border-radius combined with box-shadow? - Stack Overflow
Box shadow , rounded corner shadow , circle shadow
Box-shadow (CSS3 feature) | Daniel's Ubuntu/Linux
Add drop shadow-box to card? - Esri Community
How Do Browsers Render the Different CSS Border Style Values? - Impressive Webs
box-shadow | CSS-Tricks - CSS-Tricks
Inset box shadows with spread and rounded corners also spread to the outside if an outset box shadow is present · Issue #1737 · servo/webrender · GitHub
CSS box-shadow Property - GeeksforGeeks
CSS3 Box Shadow, only top/right/bottom/left and all · GitHub