.grid-item {
  padding: 0px;
  box-sizing: border-box;
	display:inline;
}

@media (min-width: 500px) {
  .grid-item {
    width: 50%;
  }
}

@media (min-width: 1000px) {
  .grid-item {
    width: 33.333%;
  }
}

@media (min-width: 1700px) {
  .grid-item {
    width: 25%;
  }
}

@media (min-width: 2100px) {
  .grid-item {
    width: 20%;
  }
}