css - Change the number of columns and rows in a grid as the number of items increase

Question

I have to design a responsive grid.
The grid should change based on the number of items (instead of the size of the screen).

From 5 to 6 items should be 2x3,
from 7 to 9 items should be 3x3,
from 10 to 12 items should be 3x4,
from 13 to 16 items should be 4x4, and so on...

Is this something I can do using CSS Grid?

This is what I've tried:

<main>

  <figure>
    <img src="https://placekitten.com/600/400" alt="">
  </figure>

  <figure>
    <img src="https://placekitten.com/600/400" alt="">
  </figure>

  <figure>
    <img src="https://placekitten.com/600/400" alt="">
  </figure>

  <figure>
    <img src="https://placekitten.com/600/400" alt="">

  </figure>

  <figure>
    <img src="https://placekitten.com/600/400" alt="">
  </figure>

</main>

main {
  /* display: flex; */
  /* flex-wrap: wrap; */
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  align-content: stretch;
  height: 100vh;
}
figure {
  margin: 0;
  /* flex-grow: 1; */
  /* flex-basis: 12rem; */
}
img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

Answer 1

Implicit columns creation can do this. You can consider nth-child()/nth-last-child() to create a new column when you reach a specific number of columns:

.container {
  display:inline-grid;
  grid-auto-columns:1fr;
  width:100px;
  vertical-align:top;
}
.container > :nth-child(2) {
  grid-column:2;
}

.container > :nth-last-child(5) ~ :nth-child(3),
.container > :nth-last-child(7) ~ :nth-child(3), /* 7 = 5 + 2 */
.container > :nth-last-child(9) ~ :nth-child(3){ /* 9 = 7 + 2 */
 grid-column:3;
}

.container > :nth-last-child(10) ~ :nth-child(4),
.container > :nth-last-child(13) ~ :nth-child(4), /* 13 = 10 + 3 */
.container > :nth-last-child(16) ~ :nth-child(4){ /* 16 = 13 + 3 */
 grid-column:4;
}

.container > :nth-last-child(17) ~ :nth-child(5),
.container > :nth-last-child(21) ~ :nth-child(5), /* 21 = 17 + 4 */
.container > :nth-last-child(25) ~ :nth-child(5){ /* 25 = 21 + 4 */
 grid-column:5;
}

.container > * {
  border:1px solid red;
}
.container > *::before {
  content:"";
  display:inline-block;
  padding-top:100%;
}

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