html body div.text_item {
  width: calc(50% - 32px);
  box-sizing: border-box;
  padding-left: 20px;
  padding-right: 20px; }

@media (max-width: 640px) {
  html body div.text_item {
    margin-left: 0;
    margin-right: 0;
    width: 100%; }
    html body div.text_under_body {
      padding-left: 0;
      padding-right: 0; }
    html body div.text_under {
      font-size: 16px; } }