body{font-size:16px}.row>div>div,.first-level>div,.second-level>div{background:#ccc;min-height:30px;margin-bottom:10px}.first-level>div{background:#868686 !important;margin:0.7rem 0}.second-level>div{background:#606060 !important;margin:0.7rem 0}.row>div .height-alignment{background:#ccc;min-height:120px}