metamask-extension/ui/app/components/modals/qr-scanner/index.scss

.qr-scanner {
  width: 100%;
  height: 100%;
  background-color: #fff;
  display: flex;
  flex-flow: column;
  border-radius: 8px;

  &__title {
    font-size: 1.5rem;
    font-weight: 500;
    padding: 16px 0;
    text-align: center;
  }

  &__content {
    padding-left: 20px;
    padding-right: 20px;

    &__video-wrapper {
      overflow: hidden;
      width: 100%;
      height: 275px;
      display: flex;
      align-items: center;
      justify-content: center;

      video {
        transform: scaleX(-1);
        width: auto;
        height: 275px;
      }
    }
  }

  &__status {
    text-align: center;
    font-size: 14px;
    padding: 15px;
  }

  &__image {
    font-size: 1.5rem;
    font-weight: 500;
    padding: 16px 0 0;
    text-align: center;
  }

  &__error {
    text-align: center;
    font-size: 16px;
    padding: 15px;
  }

  &__footer {
    padding: 20px;
    flex-direction: row;
    display: flex;

    button {
      margin-right: 15px;
    }

    button:last-of-type {
      margin-right: 0;
      background-color: #009eec;
      border: none;
      color: #fff;
    }
  }

  &__close::after {
    content: '\00D7';
    font-size: 35px;
    color: #9b9b9b;
    position: absolute;
    top: 4px;
    right: 20px;
    cursor: pointer;
    font-weight: 300;
  }
}