.md-columns {
    display: flex;
    flex-wrap: wrap;
    margin-left: -1rem;
    margin-right: -1rem;
  
    >div {
      flex: 1 1;
      margin: 1rem 0;
      min-width: 100px;
      max-width: 100%;
      padding: 0 1rem;
    }
  
    .markdown-inner {
      margin-top: 0;
      margin-bottom: 0;
    }
  }