header{
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    background-color: aqua;
    padding: 10px;
    color: white;
    font-size:x-large;
    -webkit-text-stroke-width: 1px;
    -webkit-text-stroke-color:black;

   

}
nav a{
    text-align: center;
    padding: 100px;
    margin: auto;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1,5em;
    color: black;
    text-decoration: none;
    
}
h2{
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    font-size: x-large;
}

.grilla{
    display: grid;
    grid-template-columns: 25% 25% 25% 25% ;
}
.grilla img{
    display: block;
}
footer{
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    background-color: aqua;
    padding: 10px;
    font-size: x-large;
    
}