.ren-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--ren-space-2, 0.5rem) var(--ren-space-4, 1rem);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  min-height: 3.5rem;
  transition: backdrop-filter var(--duration-overlay) var(--ease-state-change), background-color var(--duration-overlay) var(--ease-state-change);

  &[data-open] .ren-nav-links,
  &:has(.ren-nav-toggle[aria-expanded="true"]) .ren-nav-links {
    display: flex;
  }

  &.ren-nav-sticky {
    position: sticky;
    top: 0;
    z-index: var(--ren-z-sticky, 100);
    backdrop-filter: blur(8px);
    background-color: color-mix(in srgb, var(--color-surface) 95%, transparent);
  }

  &.ren-nav-transparent {
    background-color: transparent;
    border-bottom-color: transparent;
  }
}

.ren-nav-brand {
  display: flex;
  align-items: center;
  gap: var(--ren-space-2, 0.5rem);
  font-weight: 600;
  font-size: var(--ren-title-sm-size, 1.125rem);
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;

  &:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 0.375rem;
  }
}

.ren-nav-links {
  display: flex;
  align-items: center;
  gap: var(--ren-space-1, 0.25rem);
  list-style: none;
  margin: 0;
  padding: 0;

  @media (max-width: 48rem) {
    display: none;
    position: absolute;
    top: 3.5rem;
    inset-inline: 0;
    flex-direction: column;
    gap: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--ren-space-2, 0.5rem) 0;
    animation: ren-nav-slide-down var(--duration-enter) var(--ease-enter);
    z-index: 1000;

    @media (prefers-reduced-motion: reduce) {
      animation: none;
    }
  }
}

@keyframes ren-nav-slide-down {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ren-nav-link {
  padding: var(--ren-space-2, 0.5rem) var(--ren-space-3, 0.75rem);
  color: var(--color-text-muted);
  font-size: var(--ren-label-size, 0.875rem);
  border-radius: 0.375rem;
  transition: background-color var(--duration-state) var(--ease-state-change), color var(--duration-state) var(--ease-state-change);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;

  &:hover {
    background-color: var(--color-fill);
    color: var(--color-text);
  }

  &:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
  }

  &[aria-current="page"],
  &.active {
    color: var(--color-accent);
    font-weight: 500;
    background-color: var(--color-accent-subtle);
  }

  @media (max-width: 48rem) {
    padding: var(--ren-space-2, 0.5rem) var(--ren-space-4, 1rem);
    border-radius: 0;

    &:hover {
      background-color: var(--color-fill);
    }
  }
}

.ren-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--ren-space-2, 0.5rem);
  margin-inline-start: auto;
}

.ren-nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  background: none;
  border: none;
  padding: var(--ren-space-2, 0.5rem);
  cursor: pointer;
  color: var(--color-text);
  min-width: 44px;
  min-height: 44px;
  border-radius: 0.375rem;
  transition: background-color var(--duration-state) var(--ease-state-change);

  &:hover {
    background-color: var(--color-fill);
  }

  &:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }

  & span {
    width: 1.5rem;
    height: 2px;
    background-color: currentColor;
    border-radius: 1px;
    transition: transform var(--duration-route) var(--ease-state-change), opacity var(--duration-route) var(--ease-state-change);
    transform-origin: center;
  }

  &[aria-expanded="true"] {
    & span:nth-child(1) {
      transform: translateY(0.5rem) rotate(45deg);
    }

    & span:nth-child(2) {
      opacity: 0;
      transform: scaleX(0);
    }

    & span:nth-child(3) {
      transform: translateY(-0.5rem) rotate(-45deg);
    }
  }

  @media (max-width: 48rem) {
    display: flex;
  }
}

.ren-nav-dropdown {
  position: relative;

  & [popover] {
    padding: var(--ren-space-1, 0.25rem);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    margin-top: var(--ren-space-1, 0.25rem);
    list-style: none;
    padding-inline-start: 0;

    &[popover] {
      inset: auto auto auto auto;
    }
  }

  & .ren-nav-link[aria-expanded="true"] {
    background-color: var(--color-fill);
    color: var(--color-accent);
  }
}
/* Appearance API bridge */
.ren-nav { min-block-size: var(--ren-nav-height, 3.5rem); padding-inline: var(--ren-nav-padding-x, var(--space-4)); background: var(--ren-nav-bg, var(--color-surface)); border-color: var(--ren-nav-border, var(--color-border)); gap: var(--ren-nav-gap, var(--space-6)); }
.ren-nav a { color: var(--ren-nav-link-color, var(--color-text-muted)); }
.ren-nav a[aria-current="page"], .ren-nav a[data-active] { color: var(--ren-nav-link-active, var(--color-text)); }