metamask-extension/ui/app/css/itcss/components/modal.scss

.modal-content {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: 'DIN OT';
}

@media screen and (max-width: 575px) {
  .modal-content-title-wrapper {
    justify-content: space-around;
    width: 100%;
    height: 100px;
  }

  .modal-content-title {
    font-size: 26px;
    margin-top: 15px;
  }

  .modal-content-options {
    flex-direction: column;
    padding: 5% 33%;
  }

  .modal-content-footer {
    text-transform: uppercase;
    width: 100%;
    height: 50px;
  }

  div.modal-content-option {
    display: flex;
    flex-direction: column;
    width: 80vw;
    height: 15vh;
    margin: 10px;
    text-align: center;
    border-radius: 6px;
    border: 1px solid black;
    padding: 0% 7%;
    justify-content: space-around;

    div.modal-content-option-title {
      font-size: 20px;
    }

    div.modal-content-option-subtitle {
      font-size: 16px;
    }
  }
}

@media screen and (min-width: 576px) {
  .modal-content-title-wrapper {
    justify-content: space-around;
    width: 100%;
    height: 110px;
  }

  .modal-content-title {
    font-size: 26px;
    margin-top: 15px;
  }

  .modal-content-footer {
    text-transform: uppercase;
    width: 100%;
    height: 50px;
  }

  .modal-content-options {
    flex-direction: row;
    margin: 20px 0px
  }

  div.modal-content-option {
    display: flex;
    flex-direction: column;
    width: 20vw;
    height: 18vw;
    text-align: center;
    border-radius: 6px;
    border: 1px solid black;
    margin: 0px .5vw;
    justify-content: space-around;

    div.modal-content-option-title {
      font-size: 20px;

      @media screen and (max-width: 679px) {
        font-size: 14px;
      }

      @media screen and (min-width: 1281px) {
        font-size: 26px;
      }
    }

    div.modal-content-option-subtitle {
      font-size: 16px;
      padding: 0px 10px;
      height: 25%;

      @media screen and (max-width: 679px) {
        font-size: 10px;
        padding: 0px 10px;
        margin-bottom: 5px;
        line-height: 15px;
      }

      @media screen and (min-width: 680px) {
        font-size: 14px;
        padding: 0px 4px;
        margin-bottom: 2px;
      }

      @media screen and (min-width: 1281px) {
        font-size: 20px;
        padding: 0px 0px;
      }
    }

    div.modal-content-footer {
      margin-top: 8vh;
    }
  }
}