/* Extra small devices (phones, 600px and down) */
 @media only screen and (max-width: 480px) {

}
 /* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 480px) {
    .mobile-logo img {
        width: 68%;
    }
}
@media only screen and (min-width: 600px) {
    .mobile-logo img {
        width: 50%;
    }
}
 /* Medium devices (landscape tablets, 768px and up) */
 @media only screen and (min-width: 768px) {
    .mobile-logo img {
        width: 40%;
    }
 }