body{
    background-color: blue;
}
nav{
    background-color: aqua;
    text-align: center;
    border-radius: 10px;
    color: aliceblue;
}
ul {
    display: flex;
    justify-content: space-between;
    list-style-type: none;
    align-items: center;
    padding: 16px;

}
li{
    color: aliceblue;
}

 .cen img {
    margin: 10px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 5px solid rgb(151, 255, 47);
}
.cen {
    text-align: center;
    color: aliceblue;
}

footer img{
    width: 30px;
    height: 30px;
    border-radius: 60px;

}
footer{
    display:flex ;
    justify-content:center;
}
footer a {
   margin: 20px;
   text-align: center; 
}
/*.container{
    padding: 0px 50px;
    min-width: 320px;
    max-width: 800px;
    margin: auto;
}
*/
section{
    text-align: center;
}

 .certificados img{
     text-align: center;
     margin: 10px;
     width: 400px;
     height: 400px;
     border-radius: 15%;
     border: 5px solid rgb(151, 255, 47);

    }