Column-
This is used to define the gap between columns in a multi-column element.
Its options are:
(1) Auto, the browser will automatically decide, according to other CSS properties.
(2) Number, you set the size of the gap between the columns, such as cm or px.
For maximum browser support, you should use the following prefixes:
(1) column-gap:
(2) -moz-column-gap:
(3) -webkit-column-gap: