#main-sec {
    height: 100%;
    display: flex;
    justify-content: center;
}

#main-sec article {
    width: 30%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

#main-sec article div * {
    margin: 5px 0;
}

#main-sec article div h5 {
    font-size: 1em;
}