.inline {
    display: inline-block;
}

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    margin-top: 10%;
    width: 40%;
}
.center2 {
    display: flex;
    margin-left: auto;
    margin-right: auto;
    margin-top: 40px;
    width: 15%;
    padding: 20px;
    justify-content: center;
}

.imagen {
    padding: 20px;
    margin-top: auto;
    margin-bottom: auto;
    margin-left: auto;
    margin-right: auto;
}

.main_page {
      background-color: cadetblue;
}