Çözüldü @media CSS'leri çalışmıyor

* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;

}

a {
    text-decoration: none;
    color: black;
}


html {
    font-size: 10px;
}

body {

    line-height: 1.5;
}

.container {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: .5rem;
    padding-right: .5rem;
}

@media only screen and (min-width: 576px) {

    .container {
        max-width: 540px;
    }

    html {
        font-size: 7px;
    }



}

@media only screen and (min-width: 768px) {
    .container {
        max-width: 720px;
    }

    html {
        font-size: 8px;
    }

    .prg {
        width: 15%;
    }


}

@media only screen and (min-width: 992px) {
    .container {
        max-width: 960px;
    }

    html {
        font-size: 9px;
    }

    .prg {
        width: 16%;
    }


}

@media only screen and (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }

    html {
        font-size: 10px;
    }


}