CSS has a number of properties that are used specifically with table elements. These properties offer control over how browsers render tabular data.
border-spacing
The distance between the borders of adjacent table cells can be changed with the
border-spacing property, which is the CSS equivalent of the
cellspacing attribute in HTML. W3C defines the initial value for this property as 0, but most browsers render it as 2px by default.
border-spacing : inherit | <length> [<length>]
This property can be specified with either one or two length values. With two values, the first one sets the horizontal ...