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2026-03-09 10:47 Diff

The third numerical value assigns a feathering radius for the shadow.

box-shadow: [inset] — internal 5px — x-offset 10px — y-offset [2px] <— feathering [3px] — stretch [red]; — color

The lower the value, the sharper the shadow. The maximum clarity is achieved at zero. Feathering cannot be assigned a negative value. If feathering is not specified, then it is equal to zero.