twocol.css in Panels 5.2
Same filename and directory in other branches
.panel-2col { 
/*  overflow: hidden;  */
}
.panel-2col .panel-col-first { 
  float: left; 
  width: 49.9%; 
}
.panel-2col .panel-col-first .inside { 
  margin: 0 .5em 1em 0;
}
.panel-2col .panel-col-last { 
  float: left; 
  width: 49.9%; 
}
.panel-2col .panel-col-last .inside { 
  margin: 0 0 1em .5em;
}
#panels-edit-display .panel-pane,
#panels-edit-display .helperclass {
  margin: .5em;
}
.panel-2col .panel-separator {
  margin: 0 0 1em 0;
}
File
layouts/twocol.cssView source
- 
 - .panel-2col { 
 - /*  overflow: hidden;  */
 - }
 - 
 - .panel-2col .panel-col-first { 
 -   float: left; 
 -   width: 49.9%; 
 - }
 - 
 - .panel-2col .panel-col-first .inside { 
 -   margin: 0 .5em 1em 0;
 - }
 - 
 - .panel-2col .panel-col-last { 
 -   float: left; 
 -   width: 49.9%; 
 - }
 - 
 - .panel-2col .panel-col-last .inside { 
 -   margin: 0 0 1em .5em;
 - }
 - 
 - #panels-edit-display .panel-pane,
 - #panels-edit-display .helperclass {
 -   margin: .5em;
 - }
 - 
 - .panel-2col .panel-separator {
 -   margin: 0 0 1em 0;
 - }