@media(max-width: 900px)
{
    .button-content{
        flex-direction: column;
    }
    h1,h2,h3 {
        font-size: 20px !important;
    }
    h4 {
        font-size: 18px !important;
    }
    h5 {
        font-size: 16px !important;
    }
    h6 {
        font-size: 14px !important;
    }
    p , a , li , td , th{
        font-size: 12px !important;
    }
}