.t456__mobile {
    position:fixed;
    top:0;
    right:0;
    width:100%;
    background-color:#fff;
}

.t456__burger span:nth-child(1),.t456__burger span:nth-child(2),.t456__burger span:nth-child(3),.t456__burger span:nth-child(4) {
    background-color:#474747;
}