Customize elevation, blur, spread, and opacity to generate smooth CSS shadows in real-time.
A single sharp box-shadow often looks harsh and dated. Professional web interfaces (like Stripe, Vercel, and GitHub) create depth by combining subtle offsets with wide blur radiuses to emulate natural ambient light diffusion.
The standard CSS property takes 4 numeric dimensions and a color parameter: box-shadow: [offset-x] [offset-y] [blur-radius] [spread-radius] [color];
Always keep opacity below 30% and use a blur radius that is at least double your vertical offset (Y). This produces realistic elevation without feeling artificially dark.