.mce-content-body div.row{
    margin-left: 0px;
    margin-right: 0px;
}
[contenteditable=true] div.row{
    padding: 5px;
    border: 1px dotted #999;
}
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
    /* disable resize handler in IE11 */
    [contenteditable=true] div.row{
        pointer-events: none; 
    }
 }
[contenteditable=true] .row > div[class^="col-"], [contenteditable=true] .row > div[class*=" col-"] {
    padding-top: 20px;
    border: 1px dashed #666;
    min-height: 60px;
}
[contenteditable=true] .row > div[class^="col-"] >p:first-child, [contenteditable=true] .row > div[class*=" col-"]> p:first-child{
    min-height: 30px;
}
[contenteditable=true] .row > div[class^="col-"]:before, [contenteditable=true] .row > div[class*=" col-"]:before {
    font-size: 0.75em;
    position: absolute;
    color: #fff;
    background: #666;
    height: 15px;
    left: 0;
    top: 0;
    padding: 0 5px;
}
[contenteditable=true] .row > div[class^="col-"]:after, [contenteditable=true] .row > div[class*=" col-"]:after {
    content: '';
    display: inline-block;
    border-top: 8px solid #666;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    position: absolute;
    left: 10px;
    top: 15px;
}
[contenteditable=true] .row > div[class^="col-"][class$="12"]:before{
    content:"100% width"
}
[contenteditable=true] .row > div[class^="col-"][class$="9"]:before{
    content:"75% width"
}
[contenteditable=true] .row > div[class^="col-"][class$="8"]:before{
    content:"67% width"
}
[contenteditable=true] .row > div[class^="col-"][class$="6"]:before {
    content:"50% width"
}
[contenteditable=true] .row > div[class^="col-"][class$="4"]:before {
    content:"33% width"
}
[contenteditable=true] .row > div[class^="col-"][class$="3"]:before{
    content:"25% width"
}