message: Fixed area margins
diff: .one-line {
  display: flex;
  justify-content: space-between;
  + padding-left: -0.2em;
  + padding-right: -0.2em;
  }
  .one-line > * {
  flex-basis: 1px;
  flex-grow: 1;
  }
  -.one-line > :first-child {
  - padding-right: 0em;
  -}
  -.one-line > :last-child {
  - padding-left: 0em;
  -}
  +
  @media only screen and (min-width: 768px) {
  .column-container {
  display: flex;
  width: 100%;
  - margin-right:-5px;
  + padding-left: -0.2em;
  + padding-right: -0.2em;
  }
  .column-container > div {
  width: 100%;
  - margin-right:5px;
  + padding-left: 0.2em;
  + padding-right: 0.2em;
  }
  }
  