.container {
  display: flex;
  flex-wrap: wrap;
  max-width: 100%;
  overflow-wrap: break-word;
}

.column1 {
  flex-basis: 35%;
  width:35%;
  float:left;
  display:inline-block;
  padding: 10px;
}

.column2 {
  flex-basis: 65%;
  width:65%;
  float:left;
  display:inline-block;
  padding: 10px;
}

@media only screen and (max-width: 1000px) {
  .container {
    flex-direction: column;
  }
  .column1, .column2 {
    flex-basis: 100%;
    width:100%;
  }
}