.mobile-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  flex-shrink: 0;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
}

.mobile-nav-toggle span {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .15s, opacity .15s;
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav-toggle:focus-visible,
header .nav-links a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 720px) {
  header.mobile-menu-open {
    z-index: 2147483000 !important;
    overflow: visible !important;
    isolation: isolate;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }

  header.mobile-menu-open::after {
    content: '';
    position: fixed;
    inset: 64px 0 0;
    z-index: 998;
    background: rgba(4, 8, 16, .58);
  }

  header .nav {
    position: relative;
  }

  header .brand span {
    display: none;
  }

  .mobile-nav-toggle {
    display: inline-flex;
  }

  header .nav-links,
  .nav-links.public-menu-portal {
    display: none !important;
    position: fixed;
    top: 65px;
    right: max(12px, env(safe-area-inset-right));
    z-index: 2147483001;
    width: min(320px, calc(100vw - 32px));
    max-height: calc(100dvh - 76px);
    overflow-y: auto;
    padding: 8px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px !important;
    background: #0a0e1a !important;
    background-color: #0a0e1a !important;
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    box-shadow: 0 18px 48px rgba(0, 0, 0, .62);
    opacity: 1 !important;
    isolation: isolate;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
  }

  header .nav-links.mobile-open,
  .nav-links.public-menu-portal.mobile-open {
    display: flex !important;
  }

  header .nav-links a,
  header .nav-links a:not(.btn),
  .nav-links.public-menu-portal a,
  .nav-links.public-menu-portal a:not(.btn) {
    display: flex !important;
    align-items: center;
    min-height: 46px;
    width: 100%;
    padding: 10px 12px;
    border-radius: 7px;
    font-size: .95rem;
  }

  header .nav-links a:hover,
  header .nav-links a.active,
  .nav-links.public-menu-portal a:hover,
  .nav-links.public-menu-portal a.active {
    background: var(--surface-alt);
  }

  header .nav-links .btn,
  .nav-links.public-menu-portal .btn {
    justify-content: center;
    margin-top: 5px;
  }
}