.column { width: 350px; float: left; padding-bottom: 0px; display: inline-block;}
    .portlet { margin: 0 1em 1em 0; }
    .portlet-header { margin: 0.3em; padding-bottom: 4px; padding-left: 0.2em; }
    .portlet-header .ui-icon { float: right; }
    .portlet-content { padding: 0.4em; }
    .ui-sortable-placeholder { border: 1px dotted black; visibility: visible !important; height: 50px !important; }
    .ui-sortable-placeholder * { visibility: hidden; }