.mainfondiv_menu {
    filter: blur(10px);
}
/*.body_menu {
    transform: scale(1.1);
}
body {
    -webkit-transition: 0.3s linear;
    -moz-transition: 0.3s linear;
    -ms-transition: 0.3s linear;
    -o-transition: 0.3s linear;
    transition: 0.3s linear;
}*/