html 
{
    background:#FFF;
}

body{
    font-family: sans-serif;
}

#p-subtitle-text {
    font-size: 22px;
    font-weight: bold;
    text-align: center;
}

@media (max-width: 600px) {
    #p-subtitle-text {
        font-size: 19px;
        font-weight: bold;
        text-align: center;
    }
}