:root {
  --break-lg: 85em;
}

body {
  background-color: #FCFCFC;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

img {
  line-height: 0;
  max-width: 100%;
}

.img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15.5em, 1fr));
  flex-wrap: wrap;
  align-self: center;
  justify-content: center;
  flex-grow: 1;
  flex-shrink: 0;
  gap: 0.75em;
  padding: 0.75em;
  width: 100%;
}

.img-grid > * {
  display: flex;
  line-height: 0;
  /* transition: 0.4s ease; */
}

.img-grid > * a {
  display: flex;
  flex-grow: 1;
  position: relative;
  /* transition: 0.4s ease; */
}

.img-grid > * a::before {
  content: "";
  background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/97621/instagram.svg);
  background-repeat: no-repeat;
  background-position: center;
  mix-blend-mode: lighten;
  background-size: 90%;
  border-radius: 1.25em;
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  height: 90%;
  width: 90%;
  opacity: 0;
  top: 50%;
  left: 50%;
  /* transform: translate(-50%, -50%); */
  /* transition: 0.4s ease; */
}

.img-grid > * img {
  border-radius: 0;
  object-fit: cover;
  /* transition: 0.4s ease; */
  width: 100%;
}


.img-grid > *:hover a::before {
  opacity: 1;
  z-index: 1;
}



/* Responsive changes for large screens */
@media (min-width: 85em) {
  .img-grid {
    grid-template-columns: repeat(auto-fit, minmax(17.5em, 1fr));
    grid-auto-flow: row;
  }

  .grid-item:nth-child(4) {
    grid-column: 4 / 6;
    grid-row: 1 / 3;
  }

  .grid-item:nth-child(6) {
    grid-column: 1 / 3;
    grid-row: 2 / 4;
  }

  .grid-item:nth-child(11) {
    grid-column: 5 / 7;
    grid-row: 3 / 5;
  }

  .grid-item:nth-child(13) {
    grid-column: 2 / 4;
    grid-row: 4 / 6;
  }

  .grid-item:nth-child(20) {
    grid-column: 1 / 3;
    grid-row: 6 / 8;
  }

  .grid-item:nth-child(21) {
    grid-column: 5 / 7;
    grid-row: 6 / 8;
  }
}