Copy the following code into the theme_base.css file. This code configures Siebel Open UI to display account names in a series of vertical boxes:
/*---------------------------------------------*/   
/* Styles for alternate List display demo */   
/*---------------------------------------------*/   
.siebui-boxlist {   
  width: 100%;   
  height: 100%;   
  overflow: auto;   
}   
.siebui-boxlist-pager,.siebui-boxlist-items{   
  display: table-row;   
  white-space: nowrap;   
  width: 100%;   
}   
.siebui-boxlist-item, siebui-boxlist-item-selected {   
  padding: 100px 0px;   
  height: 40px;   
  border-radius: 5px;   
  float: left;   
  width: 120px;   
  overflow: hidden;   
  margin: 5px 12px;   
  color: #222!important;   
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);   
  text-align: center;   
}   
.siebui-boxlist-item {   
  background: rgb(250, 250, 250);   
  background: -moz-linear-gradient(top, rgba(250, 250, 250, 1) 0%, rgba(225, 225, 225, 1) 100%);   
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(250, 250, 250, 1)), color-stop(100%, rgba(225, 225, 225, 1)));   
  background: -webkit-linear-gradient(top, rgba(250, 250, 250, 1) 0%, rgba(225, 225, 225, 1) 100%);   
  border-bottom: 1px solid #AAA;   
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.4);   
  -webkit-box-shadow: 0 0 3px rgba(0, 0, 0, 0.4);   
}   
.siebui-boxlist-item-selected {   
  background: rgb(250, 250, 250);   
  background: -moz-linear-gradient(top, rgba(249, 238, 167, 0.5) 0%, rgba(251, 236, 136, 0.5) 100%)!important;   
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(249, 238, 167, 0.5)), color-stop(100%, rgba(251, 236, 136, 0.5)))!important;   
  background: -webkit-linear-gradient(top, rgba(249, 238, 167, 0.5) 0%, rgba(251, 236, 136, 0.5) 100%)!important;   
  border-bottom: 1px solid #AAA;   
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.4);   
  -webkit-box-shadow: 0 0 3px rgba(0, 0, 0, 0.4);   
}   
/*---------------------------------------------*/   
/* Styles for alternate List display demo */   
/*---------------------------------------------*/