@media screen and (max-width:720px){
    body{
        background-color: blue;
    }
    .text{
        text-align: center;
        line-height: 100vh;
        font-size: 49px;
    }
}

@media screen and (min-width: 720px) {
    body {
        background-color: yellow;
    }
    .text{
        text-align: center;
        line-height: 100vh;
        font-size: 49px;
        font-family: Arial, Helvetica, sans-serif;
    }
}