Use CSS ::before and ::after for simple, spicy image overlays - bryanlrobinson.com
Adam Argyle on Twitter: "🎨 a 4 corner layered gradient by stacking 2 simple linear gradients and using a linear mask to blend them together! 1 red to cyan gradient 1 hotpink
Grainy Gradients | CSS-Tricks - CSS-Tricks
css filters - Is it possible to make a blurred gradient shadow with CSS? - Stack Overflow