.span-informativo{
    position: absolute; 
    top: 1px; 
    right: 1px; 
    color:#fff; 
    padding: 3px; 
    border-bottom-right-radius: -11px; 
    text-align:center; 
    border: 1px solid #ffffffa1;
    border-top: none;
    border-right: none;
    font-weight: 600;
    text-shadow: 0px 0px 2px #000;
    box-shadow: -1px 1px 2px #000;
}