* {
    margin: 0px;
    padding: 0px;
}
@media (min-width: 576px)
{
    .mob {
        display: block;
    }
    .tab {
        display: none;
    }
    .desk {
        display: none;
    }
    Nav {
        color: white;
        text-align: center;
        margin-left: 20%;
        background-color: black;
        margin-right: 62%;
    }
    .title {
        margin-left: 19%;
    }
    a {
        color: white;
    }
    body {
        background-color: red;
    }
    .container {
        width: 60%;
        text-align: center;
        padding: 1px;
    }
    section {
        margin-bottom: 3px;
        border: 2px black solid;
        padding: 1px;
    }
    img {
        width: 100%;
    }

}
@media (min-width: 720px) 
{
    .mob {
        display: none;
    }
    .tab {
        display: block;
    }
    .desk {
        display: none;
    }
    .title {
        margin-left: 44%;
    }
    body {
        background-color: green;
    }
    Nav {
        color: white;
        text-align: center;
        margin-left: 43%;
        margin-right: 40%;
        background-color: black;
    }
    a {
        color: white;
        padding-left: 3px;
    }
    .container {
        margin-top: 5px;
        margin-left: 22%;
        width: 60%;
        padding: 1px;
    }
    section {
        margin-bottom: 5px;
        border: 2px black solid;
        padding: 1px;
        display: flow-root;
    }
    img {
        width: 100%;
        float: left;
    }
}
@media (min-width: 922px)
{
    .mob {
        display: none;
    }
    .tab {
        display: none;
    }
    .desk {
        display: block;
    }
    .title {
        margin-left: 48.3%;
    }
    body {
        background-color: blue;
    }
    Nav {
        color: white;
        text-align: center;
        margin-left: 43%;
        margin-right: 40%;
        background-color: black;
    }
    a {
        color: white;
        padding-left: 3px;
    }
    .container {
        margin-top: 5px;
        margin-left: 22%;
        width: 60%;
        padding: 1px;
    }
    section {
        margin-bottom: 5px;
        border: 2px black solid;
        padding: 1px;
        display: flow-root;
    }
    img {
        width: 50%;
        float: right;
    }
    .right {
        float: left;
    }
}