.av-layout-grid-container.grid421 {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
}

.av-layout-grid-container.grid421 .flex_cell {
  flex: 0 1 25%;
  width: unset !important
}

@media only screen and (min-width: 768px) and (max-width: 989px) {
  .av-layout-grid-container.grid421 .flex_cell {
    flex: 0 1 50%;
  }
}

@media only screen and (max-width: 767px) {
  .av-layout-grid-container.grid421 .flex_cell {
    flex: 1 1 100%;
  }
}

.av-layout-grid-container.grid531 {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
}

.av-layout-grid-container.grid531 .flex_cell {
  flex: 0 1 20%;
  width: unset !important
}

/*** here you can see that i set the width to 33.33% and the first zero indicates that they could not grow  ***/
/*** the content is her justified : center - so the two containers at the end will be centered   ***/
/*** row-reverse is for breaking the other way round.   ***/

@media only screen and (min-width: 768px) and (max-width: 989px) {
  .av-layout-grid-container.grid531 {
    flex-flow: row-reverse wrap;
    justify-content: center;
  }
  .av-layout-grid-container.grid531 .flex_cell {
    flex: 0 1 33.33%;
  }
}

@media only screen and (max-width: 767px) {
  .av-layout-grid-container.grid531 .flex_cell {
    flex: 1 1 100%;
  }
}