.references-grid {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 25px;
  max-width: 1300px;
  margin: 0 auto;
}
.references-grid .reference-item {
  width: calc(33.33% - 12px);
  margin-bottom: 25px;
  position: relative;
}
.references-grid .reference-item img {
  width: 100%;
  display: block;
}
.references-grid .reference-item div {
  opacity: 0;
  -webkit-user-select: none;
          user-select: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 28, 44, 0.6);
  transition: all 0.3s;
  padding: 20px;
}
.references-grid .reference-item div * {
  width: 100%;
  text-align: center;
}
.references-grid .reference-item:hover div {
  opacity: 1;
}

@media (max-width: 1020px) {
  .references-grid .reference-item {
    width: calc(50% - 12px);
  }
}
@media (max-width: 670px) {
  .references-grid .reference-item {
    width: 100%;
  }
}
@media (min-width: 1500px) {
  .references-grid {
    max-width: 1300px;
  }
  .references-grid .reference-item {
    width: calc(33.33% - 12px);
  }
}
@media (min-width: 1800px) {
  .references-grid {
    max-width: 1500px;
  }
  .references-grid .reference-item {
    width: calc(25% - 12px);
  }
}