body {
    font-family:courier;
    font-size:95%;
}

#fecha {
    color:red;
    font-family:arial;
    font-size:90%;
     
}
#uno {
   border:1px solid black;
   background-color:lightgrey;  
}
#dos {
    font-size:70%;
    font-weight: bold; 
}