.list {
  position: relative;
}
.list-item {
  position: relative;
  background: #ddd;
  border: 1px solid #eee;
  margin-bottom: 20px;
  min-height: 50px;
}
.box-180-50 {
  background: #5584ff;
  width: 180px;
  height: 50px;
}