Burger menu not displaying on 1024 screens and ipad landscape

I do not understand what I need to adjust. Can you assist? I have the split menu code, as below, and it still does not show the burger menu in Landscape or smaller laptops.

/*————————*/
/* CSS – Logo center split menu
/*————————*/

@media only screen and (min-width: 1024px) {
/*In the below code nth-child(x) the value of x should be half the number of total menu items*/
#top #header .av-main-nav li:nth-child(4) {
/* Adjust the width of the logo */
margin-right:260px;
}

#header .main_menu {
/*background: gold;*/
width: 100%;
left: 50%;
transform: translateX(-50%);
}

.av-main-nav-wrap {
left: 50%;
transform: translateX(-50%);
}

#header .logo {
left: 50%;
transform: translateX(-50%);
z-index:999;
}

#header .logo img {
top: 50%;
transform: translateY(-50%);
max-width: 100px;
}
}

#header .logo img {
top: 50%;
transform: translateY(-50%);
max-width: 215px;
}

I still have not received assistance. Is there someone able to assist?