title: Dropzone.js preview image positioning
body: <p>I have an issue for positioning the preview images inside the dropzones when they are dropped.
  I have set a dropzone, with a blue border.
  When I drag an image in it, its preview appears slightly shifted to the right and the bottom. As a result I see the blue border of the zone only on the top and the left, and the preview goes over the right and bottom lines.
  I would like the preview image come exactly inside the dropzone but cannot find the way to make it right.</p>
  
  <p>Any idea? Here is an extract of the CSS code below - a bit long as I have troubles finding out where is the problem mentioned...
  Thanks in advance for your help!</p>
  
  <pre><code>.dropzone {
    position: relative;
  /*  border: 1px solid rgba(0,0,0,0.08);
    background: rgba(0,0,0,0.02);
    padding: 1em;*/
  }
  
  /* *****CHAMP CADRE BLANC***** */
  .dropzone .dz-preview,
  .dropzone-previews .dz-preview {
    background: rgba(255,255,255,0.8);
    position: relative;
    display: inline-block;
    margin: 0px;
    vertical-align: top;
    border: none;
    padding: 0px 0px 0px 0px;
  }
  
  
  /* *****CHAMP CADRE BLANC***** */
  .dropzone .dz-preview .dz-details,
  .dropzone-previews .dz-preview .dz-details {
    width: 70px; /*******/
    height: 70px; /*******/
    position: relative;
    background: #ebebeb;
    padding: 0px;
    margin-bottom: 0px;
  }
  .dropzone .dz-preview .dz-details .dz-filename,
  .dropzone-previews .dz-preview .dz-details .dz-filename {
    overflow: hidden;
    height: 100%;
  }
  
  /* *****CHAMP IMAGE UPLOADEE***** */
  .dropzone .dz-preview .dz-details img,
  .dropzone-previews .dz-preview .dz-details img {
    position: absolute;
    top: 0;
    left: 0;
    width: 70px; /*******/
    height: 70px; /*******/
    -webkit-border-radius: 3px;
    border-radius: 3px;
  }
  
  
  /* *****CHAMP CHECKMARK***** */
  .dropzone .dz-preview .dz-success-mark,
  .dropzone-previews .dz-preview .dz-success-mark,
  .dropzone .dz-preview .dz-error-mark,
  .dropzone-previews .dz-preview .dz-error-mark {
    display: none;
    position: absolute;
    width: 40px;
    height: 40px;
    font-size: 30px;
    text-align: center;
    right: -39px; /*******/
    top: 32px; /*******/
  }
  
  .dropzone .dz-preview .dz-progress,
  .dropzone-previews .dz-preview .dz-progress {
    position: absolute;
    top: 10px;
    left: 6px;
    right: 6px;
    height: 6px;
    background: #d7d7d7;
    display: none;
  }
  .dropzone .dz-preview .dz-progress .dz-upload,
  .dropzone-previews .dz-preview .dz-progress .dz-upload {
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 0%;
    background-color: #8cc657;
  }
  
  .dropzone .dz-preview .dz-error-message,
  .dropzone-previews .dz-preview .dz-error-message {
    display: none;
    position: absolute;
    top: -5px;
    left: -20px;
    background: rgba(245,245,245,0.8);
    padding: 8px 10px;
    color: #800;
    min-width: 140px;
    max-width: 500px;
    z-index: 500;
  }
  
  
  /* *****CHAMP DROPZONE***** */
  .dropzone {
    border: 1px solid #256EB8;
    /*min-height: 360px;*/
    height:70px;
    width:70px;
    -webkit-border-radius: 3px;
    border-radius: 3px;
    /*background: blue;*/
    background-image: url("MY_IMAGE.png");
    padding: 0px;
    margin:0px;
  }
  
  /* *****CHAMP DROPZONE MESSAGE ACCUEIL***** */
  .dropzone .dz-default.dz-message {
    opacity: 1;
    background-image: url("../images/spritemap.png");
  
  
    /*background-repeat: no-repeat;
    background-position: 0 0;*/
    position: absolute;
    width: 70px; /*******/
    height: 70px; /*******/
    /*margin-left: -214px;
    margin-top: -61.5px;
    top: 50%;
    left: 50%;*/
  }
  @media all and (-webkit-min-device-pixel-ratio:1.5),(min--moz-device-pixel-ratio:1.5),(-o-min-device-pixel-ratio:1.5/1),(min-device-pixel-ratio:1.5),(min-resolution:138dpi),(min-resolution:1.5dppx) {
    .dropzone .dz-default.dz-message {
  
      background-image: url("MY_IMAGE.png");
      -webkit-background-size: 428px 406px;
      -moz-background-size: 428px 406px;
      background-size: 428px 406px;
    }
  }
  
  /*.dropzone .dz-preview,
  .dropzone-previews .dz-preview {
    -webkit-box-shadow: 1px 1px 4px rgba(0,0,0,0.16);
    box-shadow: 1px 1px 4px rgba(0,0,0,0.16);
  }*/
  </code></pre>