🍱CSS Grid

.grid {
  display: grid;
  grid-gap: 30px;
  grid-template-columns: repeat(auto-fill, 112px);
  /* or this */
  grid-template-columns: repeat(auto-fill, minmax(112px, 1fr));
}

/* To select modern Grid browsers and IE 11 */
@supports (display: grid) {
  grid-gap: 20px;
}

/* Else */
@supports not (display: grid) {
  li {
    padding: 10px;
  }
}

/* Edge 16 and higher */
@supports (display: -ms-grid) and (display: grid) {
  div {
    width: auto;
  }
}

/* Edge 15 and lower */
@supports (display: -ms-grid) and (not (display: grid)) {
  div {
    margin: 0;
  }
}

// To select only Grid browsers without IE 11
@supports (grid-gap: 0) {
  grid-gap: 20px;
}

Fluid columns snippet

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  /* This is better for small screens, once min() is better supported */
  /* grid-template-columns: repeat(auto-fill, minmax(min(200px, 100%), 1fr)); */
  gap: 1rem;
}