.preview {position: relative; margin-bottom: 20px;}
.preview-mask {position: absolute; bottom: 0; left: 0; right: 0; height: 100px;}
.preview-mask {
    background-image: -webkit-linear-gradient(top, transparent, #ffffff); /* For Chrome and Safari */
    background-image: -moz-linear-gradient(top, transparent, #ffffff); /* For old Fx (3.6 to 15) */
    background-image: -ms-linear-gradient(top, transparent, #ffffff); /* For pre-releases of IE 10*/
    background-image: -o-linear-gradient(top, transparent, #ffffff); /* For old Opera (11.1 to 12.0) */
    background-image: linear-gradient(to bottom, transparent, #ffffff); /* Standard syntax; must be last */
}

iframe-consent {
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
}

.clearfix {
    clear: both;
}