metamask-extension/ui/app/components/modals/metametrics-opt-in-modal/index.scss

.metametrics-opt-in-modal {
  .metametrics-opt-in__main {
    justify-content: center;
    margin-left: 3%;
    margin-right: 0%;
    max-height: 75vh;

    @media screen and (max-width: 575px) {
      max-height: 100vh;
    }
  }


  .metametrics-opt-in__title {
    font-size: 38px;
  }

  .metametrics-opt-in__content {
    padding-right: 6px;
  }

  .metametrics-opt-in__footer {
    @media screen and (max-width: 575px) {
      margin-top: 10px;
      justify-content: center;
      margin-left: 2%;
      max-height: 520px;
    }
  }
}