How multiple CSS box shadows are painted
Compose and reorder comma-separated box-shadow layers without hiding their paint order.
ReadCSS shadow fundamentals
Understand layers, syntax and inset geometry
Three practical guides explain paint order, every generated token and the difference between outer and inset shadows.
CSS box-shadow syntax from controls to code
Read offsets, blur, spread, colour and alpha in one deterministic declaration.
ReadInset versus outer CSS box shadows
Understand what inset changes and what remains the same in the copied layer.
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