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   1  // Responsive images (ensure images don't scale beyond their parents)
   2  //
   3  // This is purposefully opt-in via an explicit class rather than being the default for all `<img>`s.
   4  // We previously tried the "images are responsive by default" approach in Bootstrap v2,
   5  // and abandoned it in Bootstrap v3 because it breaks lots of third-party widgets (including Google Maps)
   6  // which weren't expecting the images within themselves to be involuntarily resized.
   7  // See also https://github.com/twbs/bootstrap/issues/18178
   8  .img-fluid {
   9    @include img-fluid();
  10  }
  11  
  12  
  13  // Image thumbnails
  14  .img-thumbnail {
  15    padding: $thumbnail-padding;
  16    background-color: $thumbnail-bg;
  17    border: $thumbnail-border-width solid $thumbnail-border-color;
  18    @include border-radius($thumbnail-border-radius);
  19    @include box-shadow($thumbnail-box-shadow);
  20  
  21    // Keep them at most 100% wide
  22    @include img-fluid();
  23  }
  24  
  25  //
  26  // Figures
  27  //
  28  
  29  .figure {
  30    // Ensures the caption's text aligns with the image.
  31    display: inline-block;
  32  }
  33  
  34  .figure-img {
  35    margin-bottom: $spacer * .5;
  36    line-height: 1;
  37  }
  38  
  39  .figure-caption {
  40    @include font-size($figure-caption-font-size);
  41    color: $figure-caption-color;
  42  }