body {
  margin: 0;
  padding: 0;
}

header {
  text-align: center;
  grid-area: header;
}

.box-1 {
  grid-area: box-1;
  justify-content: left;
}

.box-2 {
  grid-area: box-2;
}

.box-3 {
  grid-area: box-3;
}

.box-4 {
  grid-area: box-4;
}

.box-5 {
  grid-area: box-5;
}

.box-6 {
  grid-area: box-6;
}

.box-7 {
  grid-area: box-7;
}

.box-8 {
  grid-area: box-8;
}

.box-9 {
  grid-area: box-9;
}

.box-10 {
  grid-area: box-10;
}

.grid-container {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto;
  justify-items: center;
  gap: 1em;
  height: 100vh;
  width: 100vw;
  grid-template-areas: "header" "box-1" "box-2" "box-3" "box-4" "box-5" "box-6" "box-7" "box-8" "box-9" "box-10"
}

.box {
  border: 3px solid pink;
  background: linear-gradient(160deg, #00f6ff, #89dfdc, #b4c7ba, #d0ae99, #e29379, #f0765a, #f9513b, #ff001b);
  border-radius: 4px;
  box-shadow: 0 7px 8px 0;
  min-height: 100px;
  width: 100%;
}

@media (min-width: 768px) {
  .grid-container {
    display: grid;
    height: 100%;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 100%;
    grid-template-areas: "header header" "box-1 box-1" "box-2 box-3" "box-4 box-4" "box-5 box-6" "box-7 box-7" "box-8 box-9" "box-10 box-10"
  }
}

@media (min-width: 992px) {
  .grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    height: 100%;
    width: 100%;
    grid-template-areas: "header header header header" "box-1 box-1 box-2 box-2" "box-3 box-3 box-4 box-5" "box-3 box-3 box-6 box-6" "box-7 box-8 box-9 box-10"
  }
}