discourse/app/assets/stylesheets/mobile/upload.scss

.upload-selector {
  input[type="text"]{
    width: 90%;
  }
  input[type="file"] {
    font-size: $font-0;
    line-height: $line-height-medium;
  }
  .description {
    color: dark-light-choose($primary-medium, $secondary-medium);
  }
  .radios {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    &:first-of-type {
      margin-bottom: 1em;
    }
    label {
      vertical-align: middle;      
    }
    input {
      line-height: $line-height-large;
    }
    .inputs {
      width: 100%;
    }
  }

}

.uploaded-image-preview {
  height: 150px;
}