ul.material-grid__items li {
	position: relative;
}

ul.material-grid__items li .serieNumber {
	position: absolute;
  left: 10px;
  top: 10px;
  border: 2px solid #004f56;
  border-radius: 15px;
  width: 30px;
  height: 30px;
  text-align: center;
  line-height: 25px;
  color: #004f56;
  font-size: 20px;
  font-family: "Lora", serif;
  background: rgba(255, 255, 255, 0.75);
}