Basically the box-shadow CSS property figures out shadow effects around the element’s frame. In this case, you can see multiple effects separated by commas. The first thing to remember is that the box-shadow is described by X and Y offsets relative to the element by blur, spread radius, and color. By the same token, you can define inset shadows. Bellow is the CSSBox Shadow Generator.
This tool lets you constructCSS box-shadow effects. For this reason, you can use this CSSBox Shadow Generator to generate box-shadow CSS3 snippets for your next design project.