/* if desktop */
    .mobile_device_380px {
        display: none;
    }
    .mobile_device_480px {
        display: none;
    }


    /* if mobile device max width 380px */
    @media only screen and (max-device-width: 380px) {
        .mobile_device_380px{display: block;}       
        .desktop {display: none;}
    } 

    /* if mobile device max width 480px */
    @media only screen and (max-device-width: 480px) {
       .mobile_device_480px{display: block;}
       .desktop {display: none;}
    }