.mce-content-body { 
    padding: 0px; 
    margin: 9px;
} 

.mce-content-body p { 
    margin: 3px 0px;
} 

span.variable {
    display: inline-block;   
    background-color: #ead;  
    color: white;            
    padding: 3px;            
    margin: 0px 5px;         
    border-radius: 3px; 
}