Figure 4.21. 15em wide columns inside a 45em wide container with column-gap: 0Withcolumn-rule,wecanaddlinestovisuallyseparatecolumns.Itfunctions
similarlytoborder,andacceptsthesamevalues.Forexample:.multi-col {
-webkit-column-rule: thin dashed #607d8b;
-moz-column-rule: thin dashed #607d8b;
column-rule: thin dashed #607d8b;
}Likeborder,column-ruleisreallyashorthandforthecolumn-rule-width,column-
rule-style,andcolumn-rule-colorproperties.Eachcolumn-rule-*property
acceptsthesamevaluesasitsbordercounterpart,andisdemonstratedinFig-
ure4.22.156 CSS Master