discourse/app/assets/stylesheets/application/lightbox.css.scss

@import "foundation/variables";
@import "foundation/mixins";

.lightbox {
  display: inline-block;
  position: relative;
  background: black;

  img {
    opacity: 1;
    @include transition(opacity .2s);
  }

  span {
    color: white;
    position: absolute;
    display: none;
    font-size: 18px;

    &.filename {
      top: 0;
      left: 0;
      &:before {
        font-family: "FontAwesome";
        content: "\F03E";
        margin-right: 5px;
      }
    }

    &.informations {
      color: $dark_gray;
      top: 20px;
      left: 0;
      font-size: 14px;
    }

    &.expand {
      top: 0;
      right: 0;
      &:before {
        font-family: "FontAwesome";
        content: "\F065";
      }
    }
  }

  @include hover {
    img {
      opacity: .2;
    }

    span {
      display: inline;
      margin: 10px;
    }
  }
}