@media only screen and (max-width: 800px) {
    #amp-mobile-version-switcher {
        min-width: 280%;
    }
}

@media only screen and (min-width: 390px) {
    #amp-mobile-version-switcher {
        min-width: 250%;
    }
}

@media only screen and (min-width: 500px) {
    #amp-mobile-version-switcher {
        min-width: 250%;
    }
}