Forcing Hamburger navigation on desktop

Site URL: https://cornet-iris-bgm9.squarespace.com/

Hello! I am using this code below to force the desktop version of my website into using the hamburger style navigation, but it seems to be hiding my Cart button altogether. Is there anything I can do to fix this, or does anybody have a better CSS? Thank you!

Password: 222

@media screen and (min-width:768px) {
 /* hide navigation */
    .header-nav {
    display: none;
}
/* Hide header button */
.header-actions {
    display: none;
}
/* show burger */
.header-burger {
  display: flex;
}
/* Show overlay mobile menu */
.header--menu-open .header-menu {
opacity: 1;
visibility: visible;
  
  }
}

Can you check site url?