* {
  box-sizing: border-box;
}

body {
  background-color: lightblue;
}

.tri-grid__item:nth-of-type(n + 6) {
  --counter: 2;
}

.tri-grid__item:nth-of-type(n + 11) {
  --counter: 3;
}

.tri-grid__item:nth-of-type(n + 16) {
  --counter: 4;
}

.tri-grid__item:nth-of-type(n + 21) {
  --counter: 5;
}

.tri-grid__item:nth-of-type(n + 26) {
  --counter: 6;
}

.tri-grid__item:nth-of-type(n + 31) {
  --counter: 7;
}

.tri-grid__item:nth-of-type(n + 36) {
  --counter: 8;
}

.tri-grid__item:nth-of-type(n + 41) {
  --counter: 9;
}

.tri-grid__item:nth-of-type(n + 46) {
  --counter: 10;
}

.tri-grid__item:nth-of-type(n + 51) {
  --counter: 11;
}

.tri-grid__item:nth-of-type(n + 56) {
  --counter: 12;
}

.tri-grid__item:nth-of-type(n + 61) {
  --counter: 13;
}

.tri-grid__item:nth-of-type(n + 66) {
  --counter: 14;
}

.tri-grid__item:nth-of-type(n + 71) {
  --counter: 15;
}

.tri-grid__item:nth-of-type(n + 76) {
  --counter: 16;
}

.tri-grid__item:nth-of-type(n + 81) {
  --counter: 17;
}

.tri-grid__item:nth-of-type(n + 86) {
  --counter: 18;
}

.tri-grid__item:nth-of-type(n + 91) {
  --counter: 19;
}

.tri-grid__item:nth-of-type(n + 96) {
  --counter: 20;
}

.tri-grid__item:nth-of-type(n + 101) {
  --counter: 21;
}

.tri-grid__content:hover {
  background-color: gray;
}

.tri-grid__item:nth-of-type(even) .tri-grid__content {
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.tri-grid__item:nth-of-type(odd) .tri-grid__content {
  clip-path: polygon(0% 0%, 100% 0%, 50% 100%);
}

.tri-grid {
  display: flex;
  justify-content: center;
}

.tri-grid__list {
  --counter: 1;
  --amount: 5;
  position: relative;
  padding: 0;
  margin: 0;
  list-style-type: none;
  display: grid;
  grid-template-columns: repeat(var(--amount), 7fr 1fr) 7fr;
  grid-gap: 1rem 0rem;
}

.tri-grid__item {
  position: relative;
  grid-column: 1 / span 3;
  grid-row: calc(var(--counter) + var(--counter))/span 2;
  filter: drop-shadow(0 0 10px rgba(68, 68, 68, 0.08));
  height: 0;
  padding-bottom: 90%;
}

.tri-grid__content {
  left: 0;
  top: 0;
  position: absolute;
  height: 100%;
  width: 100%;
  font-size: 1.125rem;
  color: #111111;
  background-color: darkgray;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  text-align: center;
  transition: transform .24s ease-out;
}

@media screen and (min-width: 1440px) {
  .tri-grid__list {
    --amount: 5;
    --counter: 1;
  }
  .tri-grid__item:nth-of-type(5n + 1) {
    grid-column: 1 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(5n + 2) {
    grid-column: 3 / span 3;
  }
  .tri-grid__item:nth-of-type(5n + 3) {
    grid-column: 5 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(5n + 4) {
    grid-column: 7 / span 3;
  }
  .tri-grid__item:nth-of-type(5n + 5) {
    grid-column: 9 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(n + 6) {
    --counter: 2;
  }
  .tri-grid__item:nth-of-type(n + 11) {
    --counter: 3;
  }
  .tri-grid__item:nth-of-type(n + 16) {
    --counter: 4;
  }
  .tri-grid__item:nth-of-type(n + 21) {
    --counter: 5;
  }
  .tri-grid__item:nth-of-type(n + 26) {
    --counter: 6;
  }
  .tri-grid__item:nth-of-type(n + 31) {
    --counter: 7;
  }
  .tri-grid__item:nth-of-type(n + 36) {
    --counter: 8;
  }
  .tri-grid__item:nth-of-type(n + 41) {
    --counter: 9;
  }
  .tri-grid__item:nth-of-type(n + 46) {
    --counter: 10;
  }
  .tri-grid__item:nth-of-type(n + 51) {
    --counter: 11;
  }
  .tri-grid__item:nth-of-type(n + 56) {
    --counter: 12;
  }
  .tri-grid__item:nth-of-type(n + 61) {
    --counter: 13;
  }
  .tri-grid__item:nth-of-type(n + 66) {
    --counter: 14;
  }
  .tri-grid__item:nth-of-type(n + 71) {
    --counter: 15;
  }
  .tri-grid__item:nth-of-type(n + 76) {
    --counter: 16;
  }
  .tri-grid__item:nth-of-type(n + 81) {
    --counter: 17;
  }
  .tri-grid__item:nth-of-type(n + 86) {
    --counter: 18;
  }
  .tri-grid__item:nth-of-type(n + 91) {
    --counter: 19;
  }
  .tri-grid__item:nth-of-type(n + 96) {
    --counter: 20;
  }
  .tri-grid__item:nth-of-type(n + 101) {
    --counter: 21;
  }
}

@media screen and (min-width: 1120px) and (max-width: 1439px) {
  .tri-grid__list {
    --amount: 4;
    --counter: 1;
  }
  .tri-grid__item:nth-of-type(4n + 1) {
    grid-column: 1 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(4n + 2) {
    grid-column: 3 / span 3;
  }
  .tri-grid__item:nth-of-type(4n + 3) {
    grid-column: 5 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(4n + 4) {
    grid-column: 7 / span 3;
  }
  .tri-grid__item:nth-of-type(n + 5) {
    --counter: 2;
  }
  .tri-grid__item:nth-of-type(n + 9) {
    --counter: 3;
  }
  .tri-grid__item:nth-of-type(n + 13) {
    --counter: 4;
  }
  .tri-grid__item:nth-of-type(n + 17) {
    --counter: 5;
  }
  .tri-grid__item:nth-of-type(n + 21) {
    --counter: 6;
  }
  .tri-grid__item:nth-of-type(n + 25) {
    --counter: 7;
  }
  .tri-grid__item:nth-of-type(n + 29) {
    --counter: 8;
  }
  .tri-grid__item:nth-of-type(n + 33) {
    --counter: 9;
  }
  .tri-grid__item:nth-of-type(n + 37) {
    --counter: 10;
  }
  .tri-grid__item:nth-of-type(n + 41) {
    --counter: 11;
  }
  .tri-grid__item:nth-of-type(n + 45) {
    --counter: 12;
  }
  .tri-grid__item:nth-of-type(n + 49) {
    --counter: 13;
  }
  .tri-grid__item:nth-of-type(n + 53) {
    --counter: 14;
  }
  .tri-grid__item:nth-of-type(n + 57) {
    --counter: 15;
  }
  .tri-grid__item:nth-of-type(n + 61) {
    --counter: 16;
  }
  .tri-grid__item:nth-of-type(n + 65) {
    --counter: 17;
  }
  .tri-grid__item:nth-of-type(n + 69) {
    --counter: 18;
  }
  .tri-grid__item:nth-of-type(n + 73) {
    --counter: 19;
  }
  .tri-grid__item:nth-of-type(n + 77) {
    --counter: 20;
  }
  .tri-grid__item:nth-of-type(n + 81) {
    --counter: 21;
  }
}

@media screen and (min-width: 840px) and (max-width: 1119px) {
  .tri-grid__list {
    --amount: 3;
    --counter: 1;
    grid-gap: 1.5rem 3rem;
  }
  .tri-grid__item:nth-of-type(3n + 1) {
    grid-column: 1 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(3n + 2) {
    grid-column: 3 / span 3;
  }
  .tri-grid__item:nth-of-type(3n + 3) {
    grid-column: 5 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(n + 4) {
    --counter: 2;
  }
  .tri-grid__item:nth-of-type(n + 7) {
    --counter: 3;
  }
  .tri-grid__item:nth-of-type(n + 10) {
    --counter: 4;
  }
  .tri-grid__item:nth-of-type(n + 13) {
    --counter: 5;
  }
  .tri-grid__item:nth-of-type(n + 16) {
    --counter: 6;
  }
  .tri-grid__item:nth-of-type(n + 19) {
    --counter: 7;
  }
  .tri-grid__item:nth-of-type(n + 22) {
    --counter: 8;
  }
  .tri-grid__item:nth-of-type(n + 25) {
    --counter: 9;
  }
  .tri-grid__item:nth-of-type(n + 28) {
    --counter: 10;
  }
  .tri-grid__item:nth-of-type(n + 31) {
    --counter: 11;
  }
  .tri-grid__item:nth-of-type(n + 34) {
    --counter: 12;
  }
  .tri-grid__item:nth-of-type(n + 37) {
    --counter: 13;
  }
  .tri-grid__item:nth-of-type(n + 40) {
    --counter: 14;
  }
  .tri-grid__item:nth-of-type(n + 43) {
    --counter: 15;
  }
  .tri-grid__item:nth-of-type(n + 46) {
    --counter: 16;
  }
  .tri-grid__item:nth-of-type(n + 49) {
    --counter: 17;
  }
  .tri-grid__item:nth-of-type(n + 52) {
    --counter: 18;
  }
  .tri-grid__item:nth-of-type(n + 55) {
    --counter: 19;
  }
  .tri-grid__item:nth-of-type(n + 58) {
    --counter: 20;
  }
  .tri-grid__item:nth-of-type(n + 61) {
    --counter: 21;
  }
}

@media screen and (min-width: 480px) and (max-width: 839px) {
  .tri-grid__list {
    --amount: 2;
    --counter: 1;
    grid-gap: 1.5rem 3rem;
  }
  .tri-grid__item:nth-of-type(2n + 1) {
    grid-column: 1 / span 3;
    /* grid-row: calc(var(--counter) + var(--counter) - 1) / span 2; */
  }
  .tri-grid__item:nth-of-type(2n + 2) {
    grid-column: 3 / span 3;
  }
  .tri-grid__item:nth-of-type(n + 3) {
    --counter: 2;
  }
  .tri-grid__item:nth-of-type(n + 5) {
    --counter: 3;
  }
  .tri-grid__item:nth-of-type(n + 7) {
    --counter: 4;
  }
  .tri-grid__item:nth-of-type(n + 9) {
    --counter: 5;
  }
  .tri-grid__item:nth-of-type(n + 11) {
    --counter: 6;
  }
  .tri-grid__item:nth-of-type(n + 13) {
    --counter: 7;
  }
  .tri-grid__item:nth-of-type(n + 15) {
    --counter: 8;
  }
  .tri-grid__item:nth-of-type(n + 17) {
    --counter: 9;
  }
  .tri-grid__item:nth-of-type(n + 19) {
    --counter: 10;
  }
  .tri-grid__item:nth-of-type(n + 21) {
    --counter: 11;
  }
  .tri-grid__item:nth-of-type(n + 23) {
    --counter: 12;
  }
  .tri-grid__item:nth-of-type(n + 25) {
    --counter: 13;
  }
  .tri-grid__item:nth-of-type(n + 27) {
    --counter: 14;
  }
  .tri-grid__item:nth-of-type(n + 29) {
    --counter: 15;
  }
  .tri-grid__item:nth-of-type(n + 31) {
    --counter: 16;
  }
  .tri-grid__item:nth-of-type(n + 33) {
    --counter: 17;
  }
  .tri-grid__item:nth-of-type(n + 35) {
    --counter: 18;
  }
  .tri-grid__item:nth-of-type(n + 37) {
    --counter: 19;
  }
  .tri-grid__item:nth-of-type(n + 39) {
    --counter: 20;
  }
  .tri-grid__item:nth-of-type(n + 41) {
    --counter: 21;
  }
}

@media screen and (max-width: 479px) {
  .tri-grid__list {
    --amount: 1;
    grid-gap: 1.5rem 3rem;
  }
}