* {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(125px, 1fr));
  grid-template-rows: repeat(3, minmax(100px, 1fr));
  grid-auto-rows: minmax(100px, 1fr);
  max-width: 1000px;
  background-color: lightblue;
  border: 3px solid;
  border-radius: 8px;
  padding: 2rem 1rem;
  gap: 1.5rem;
  margin: 5lh auto 0;
}
[class^='box'] {
  border: 1px solid;
  border-radius: 5px;
  display: grid;
  place-items: center;
  transition: background-color .3s,
    transform .1s,
    font-size 1s;

}
[class^='box']:hover {
  background-color: rgb(167, 180, 221);
  transform: scale(1.05);
  color: rgb(255, 209, 72);
  font-size: 2rem;
}
@media (min-width: 900px) {
  body {
    background-color: gray;
  }
  .box-1,
  .box-2,
  .box-12 {
    grid-row: span 2;
    grid-column: span 2;
  }
  .box-5,
  .box-6,
  .box-9 {
    grid-column: span 2;
  }
  .box-11 {
    grid-row: span 2;
  }
}