.hidder_menuu {
    background: #000;
    margin-top: 0px;
    position: fixed;
    z-index: 2222222222222;
    width: 62%;
    display: none;
}

.show_mobiler {
    visibility: hidden;
}

@media only screen and (min-width: 260px) and (max-width: 800px) {
    .show_mobiler {
        visibility: visible !important;
    }
}