@media (max-width: 800px) {
  .main-nav.is-open {
    display: flex;
    position: absolute;
    top: 75px;
    right: 0;
    left: 0;
    flex-direction: column;
    gap: 17px;
    padding: 22px 24px;
    background: #fff;
    box-shadow: 0 12px 20px rgba(11, 46, 94, .1);
  }
}