#amigos{
    display: flex;
    flex-direction: column;
    align-items: center;
}

#amigos img {
    max-width:60%;
    height: auto;
}

#agenda{
    display: flex;
    flex-direction: column;
    align-items: center;
}

#agenda img {
    max-width: 60%;
    height: auto;
}