editor-style.css

/*
Theme Name: required+ Foundation
Description: Used to style the TinyMCE editor.
*/

@import url(stylesheets/editor-style.css);

html .mceContentBody {
    padding: 5px;
    max-width: 657px;
}
/* =Alignment
-------------------------------------------------------------- */

.alignleft {
    display: inline;
    float: left;
    margin: 12px 24px 12px 0;
    margin: 0.857142857rem 1.714285714rem 0.857142857rem 0;
}
.alignright {
    display: inline;
    float: right;
    margin: 12px 0 12px 24px;
    margin: 0.857142857rem 0 0.857142857rem 1.714285714rem;
}
.aligncenter {
    clear: both;
    display: block;
    margin-top: 12px;
    margin-top: 0.857142857rem;
    margin-bottom: 12px;
    margin-bottom: 0.857142857rem;
}

/* =Images
-------------------------------------------------------------- */

img {
    border: 0;
    border-radius: 3px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    max-width: 100%;
}
img.size-full {
    width: auto/9; /* Prevent stretching of full-size images in IE8 */
}
img[class*="wp-image-"] {
    height: auto;
    max-width: 100%;
}
img[class*="align"],
img[class*="wp-image-"],
img[class*="attachment-"] {
    height: auto; /* Make sure images with WordPress-added height and width attributes are scaled correctly */
}
img.mceWPnextpage {
    border-radius: 0;
    box-shadow: none;
}
img.wp-smiley {
    border: 0;
    border-radius: 0;
    box-shadow: none;
    margin-bottom: 0;
    margin-top: 0;
    padding: 0;
}
.wp-caption {
    background: transparent;
    border: none;
    margin: 0;
    padding: 4px;
    text-align: left;
}
.wp-caption-dt {
    margin: 0;
}
.wp-caption .wp-caption-text,
.wp-caption-dd {
    color: #777;
    font-style: italic;
    font-size: 12px;
    font-size: 0.857142857rem;
    line-height: 2;
    margin: 0 0 24px;
    margin: 0 0 1.71429rem;
}