*{
    font-family:Arial, Helvetica, sans-serif;
    text-align:center;
}

h1, h2 {
    color: white;
    position: center;
}

.roundbox {
    border-radius: 25px;
    background: #3eb78f;
    padding: 20px;
    margin: 50px;
    width: stretch;
    height: stretch;
}