CSS prototype

.guidesOn::before {
    content:""; 
    position:fixed; 
    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAACxEAAAsRAX9kX5EAAAAZdEVYdFNvZnR3YXJlAFBhaW50Lk5FVCB2My41LjVJivzgAAAAyUlEQVRoQ%2B2abQqAIBBEPW1X6CzdqTv1RUFIipi2o72gPyXV7uybKci5wDZM8xI6dz%2Buvs6pP2Dq81GI2qiiiJkiOzQ97EGHTXUF9XUwYsaI2o1LjyqjpaYwiqDI2YFs2HtI9Wjx2Z0R%2B1ADdmB%2FC7taB0uzCSNqCqOImSIkeyW7xLXMZvqjdzJcS01hFEGRSnbe3miR7JVGgWRXcxkUQRFgj%2F8Y8htGtkJHL%2FvGaGtKd6bU9Z4C%2FCiEZDeCPahIa%2FbbDSNX433mVkIrV5rTnhDyAAAAAElFTkSuQmCC) 50% 0; 
    z-index:1; 
    top:0; 
    right:0; 
    bottom:0; 
    left:0; 
    opacity:.3; 
    pointer-events:none; 
}
* { 
    -webkit-user-modify: read-write; 
    word-wrap: break-word; 
    -webkit-nbsp-mode: space; 
    -webkit-line-break: after-white-space; 
} 
a { 
    -webkit-user-modify: initial; 
}