.main_container
{
    width: 700px;
    margin-left: auto;
    margin-right: auto;
}
 .greeting
{
    font-family: Arial;
    font-size: 72px;
    font-weight: bold;
    color: #FF00FF;
    text-align: center;
}

.subtext
{
    font-family: Arial;
    font-size: 20px;
    color: #0000FF;
    text-align: center;
}

.tt
{
    font-family: Arial;
    font-size: 12px;
    color: #C0C0C0;
    text-align: center;
}