body {
    display:flex;
    justify-content: space-evenly;

}
h1 {
    text-align: center;
    justify-content: center;
    display: block;
}
div {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-evenly;

}
.cards{
    display: inline-block;
    flex-wrap: wrap;
    text-align: center;
    justify-content: space-evenly;
}

.imagen{
    display: block;
    width: 300px;
}
.boton {
    text-align: center;
    justify-content: center;
}