#status_box {
    background-color: #000;
    width: 50px;
    height: 50px;
}
@media (min-width: 768px) {
    #status_box {
        background-color: yellow;
    }
    .desktop #status_box {
        background-color: orange;
    }
    .tablet #status_box {
        background-color: orange;
    }
    .mobile #status_box {
        background-color: orange;
    }
    [dir='ltr'] #status_box {
        background-color: green;
    }
}