[Super Simple Responsive CSS] Simple css for responsive layout with flex #css

grid.css

.container {
  margin: 0 auto;
  max-width: 980px;
  min-width: 320px;
}

.row {
  display: flex;
  flex-wrap: wrap;
}

.column {
  text-align: center;
  flex-grow: 1;
  flex-shrink: 1;
  flex-basis: 1;
  margin: 10px;
  padding: 10px;
}

.start {
  -webkit-box-pack: start;
  -ms-flex-pack: start;
  justify-content: flex-start;
  text-align: start;
}

.center {
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  text-align: center;
}

.end {
  -webkit-box-pack: end;
  -ms-flex-pack: end;
  justify-content: flex-end;
  text-align: end;
}

.top {
  -webkit-box-align: start;
  -ms-flex-align: start;
  align-items: flex-start;
}

.middle {
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.bottom {
  -webkit-box-align: end;
  -ms-flex-align: end;
  align-items: flex-end;
}

.col-1 {
  max-width: calc(100% / 12);
}

.col-2 {
  max-width: calc(100% / 12 * 2);
}

.col-3 {
  max-width: calc(100% / 12 * 3);
}

.col-4 {
  max-width: calc(100% / 12 * 4);
}

.col-5 {
  max-width: calc(100% / 12 * 5);
}

.col-6 {
  max-width: calc(100% / 2);
}

@media screen and (max-width: 768px) {
  .container {
    overflow: auto;
  }

  .column {
    min-width: 100%;
    width: 100%;
    margin: 10px 0;
  }
}