.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.5rem 0.8rem;
  font: 700 0.76rem/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
  outline: none;
}

.nav-toggle-bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle-bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

@media (max-width: 900px) {
  .site-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
  }

  .nav-toggle {
    display: inline-flex;
    justify-self: end;
  }

  .site-header > .site-nav,
  .site-header > .social-links {
    display: none;
    grid-column: 1 / -1;
    width: 100%;
  }

  .site-header.nav-open > .site-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
  }

  .site-header.nav-open > .social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding-top: 0.25rem;
  }

  .site-nav a {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border-radius: var(--radius-sm);
  }

  .site-nav .nav-login {
    margin-left: 0;
  }

  .social-links a {
    flex: 1 1 auto;
    min-width: max-content;
    text-align: center;
  }

  .site-header.nav-open .nav-toggle-bars span:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
  }

  .site-header.nav-open .nav-toggle-bars span:nth-child(2) {
    opacity: 0;
  }

  .site-header.nav-open .nav-toggle-bars span:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-toggle-bars span {
    transition: none;
  }
}