.menu-toggle { display: none; }

@media (max-width: 850px) {
  .main-nav { display: block; overflow: visible; }
  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 54px;
    padding: 0 20px;
    border: 0;
    background: var(--navy);
    color: #fff;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
  }
  .menu-toggle span[aria-hidden="true"] { font-size: 23px; }
  .main-nav > a { display: none; justify-content: flex-start; border-top: 1px solid #ffffff1f; }
  .main-nav.is-open > a { display: flex; }
}