/* =====================================================
   PAGE NAV — {{{pagenav}}}
   =====================================================
   Contextual, per-page horizontal navigation (distinct from
   the site header/footer). Renders as real <a href> tags — see
   Renderer.buildPageNavHtml() in render.js.

   All colors/spacing/radius reuse the site's existing tenant
   theme tokens from main.css's :root block (--primary,
   --surface-dark, --dark-2, --light-gray, --radius, --shadow-lg,
   --space-*, --text-*). No new colors are introduced — this
   file is purely layout + interaction states, so PageNav
   automatically matches whatever theme a given tenant has
   configured (site-settings.js buildThemeCss), not a fixed
   "gold" skin.

   This file only handles PageNav. It intentionally does not
   touch .review-nav (the existing in-page table-of-contents on
   review.html) or .header-nav — separate components, separate
   class namespace.
   ===================================================== */

.pagenav-shell {
  padding-top: var(--space-4);
}

/* Subtle loading state during AJAX navigation (Part 18) — dims
   slightly rather than showing a spinner/skeleton, so there's no
   layout shift and no risk of a flash of blank content. */
.pagenav--loading {
  opacity: 0.7;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

@media (prefers-reduced-motion: reduce) {
  .pagenav--loading {
    transition: none;
  }
}

.pagenav {
  position: relative;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  margin: 0 0 var(--space-6);
  padding: var(--space-2);
  box-sizing: border-box;

  background: linear-gradient(180deg, var(--dark-2), var(--surface-dark));
  border: 1px solid color-mix(in srgb, var(--primary) 35%, var(--light-gray));
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

/* Only this inner element scrolls horizontally — the outer
   .pagenav (and therefore the page) never overflows. */
.pagenav__scroll {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--primary) 60%, transparent) transparent;
  min-width: 0;
}

.pagenav__scroll::-webkit-scrollbar {
  height: 6px;
}

.pagenav__scroll::-webkit-scrollbar-track {
  background: transparent;
}

.pagenav__scroll::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--primary) 55%, transparent);
  border-radius: 999px;
}

/* "Money button" chip — premium but not ad-like: no gradients-on-
   gradients, no shadow bloom, no animation loops. */
.pagenav__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: var(--space-3) var(--space-5);
  min-height: 44px; /* touch target */

  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;

  color: var(--white);
  background: color-mix(in srgb, var(--dark-2) 85%, black);
  border: 1px solid color-mix(in srgb, var(--primary) 45%, transparent);
  border-radius: var(--btn-radius);

  transition: background-color 0.15s ease, border-color 0.15s ease,
    color 0.15s ease, transform 0.15s ease;
}

.pagenav__link:hover,
.pagenav__link:focus-visible {
  color: var(--surface-dark);
  background: var(--primary);
  border-color: var(--primary);
}

.pagenav__link:active {
  transform: translateY(1px);
}

.pagenav__link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Current page — solid gold "pressed" state, not just a hover echo */
.pagenav__link--active {
  color: var(--surface-dark);
  background: var(--primary);
  border-color: var(--primary);
  font-weight: 700;
}

.pagenav__link--active:hover,
.pagenav__link--active:focus-visible {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

@media (max-width: 768px) {
  .pagenav {
    padding: var(--space-1) var(--space-2);
    border-radius: calc(var(--radius) * 0.75);
  }

  .pagenav__link {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
  }
}

@media (prefers-reduced-motion: reduce) {
  .pagenav__scroll {
    scroll-behavior: auto;
  }

  .pagenav__link {
    transition: none;
  }
}