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img {    
    display: block;    
    font-family: Helvetica, Arial, sans-serif;    
    font-weight: 300;    
    height: auto;    
    line-height: 2;    
    position: relative;    
    text-align: center;    
    width: 100%;  
}
img:before {    
    content: "We're sorry, the image below is missing :(";    
    display: block;    
    margin-bottom: 10px;  
}    
img:after {    
    content: "(url: " attr(src) ")";   
    display: block;    
    font-size: 12px;  
}