.heading {
    text-align: center !important;
}

html,
body {
    margin: 0;
    height: 100%;
    overflow-x: hidden
}

.content-div {
    color: #000000;
    padding: 12px;
    font-size: x-small;
    text-align: justify;
}

@media (min-width: 480px) and (min-height: 480px)   {
    .content-div {
        color: #000000;
        padding: 12px;
        font-size: large;
        text-align: justify;
    }
  }