@media (max-width: 460px) { .header .blogname {display: none;}}

@media only screen and (max-width: 460px) {
    .header .blogname {
        display: none;
    }
    #blogname {
        display: none;
    }
}

@media (max-width: 460px) {
.header .blogname {
visibility:hidden;
}
}