.mobile-menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid #3a3a3a;
  color: #ffffff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 720px) {
  .header-inner {
    position: relative;
    min-height: 72px;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .header-inner .nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    z-index: 1100;
    padding: 18px;
    background: #111111;
    border: 1px solid #333333;
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.42);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .header-inner .nav.is-open {
    display: flex;
  }

  .header-inner .nav a,
  .header-inner .nav a:not(.header-button) {
    display: block;
    padding: 13px 12px;
    color: #ffffff;
    border-bottom: 1px solid #292929;
  }

  .header-inner .nav a:not(.header-button)::after {
    display: none;
  }

  .header-inner .nav .header-button {
    display: block;
    margin-top: 8px;
    padding: 13px 15px;
    text-align: center;
    border-bottom: 1px solid #f45145;
  }
}