/* ============================================================
   Sidebar TOC — Unified Component
   Used by all article/guide templates with markdown-generated TOC.
   2-column layout: content (left) + sticky TOC sidebar (right).
   On mobile: TOC collapses inline above content.
   ============================================================ */

/* LAYOUT: content + sidebar */
.pd-sidebar-layout {
  max-width: var(--max-width-editorial);
  margin: 0 auto;
  padding: var(--space-7) var(--space-6);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
}

@media (min-width: 769px) {
  .pd-sidebar-layout {
    grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
    column-gap: calc(var(--space-8) + var(--space-1));
  }
}

.pd-sidebar-layout > :not(.pd-sidebar) {
  min-width: 0;
  width: 100%;
}

/* SIDEBAR CONTAINER */
.pd-sidebar {
  order: -1;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 769px) {
  .pd-sidebar {
    order: 0;
    position: sticky;
    top: calc(var(--header-height) + var(--space-5));
    align-self: start;
  }

  .pd-sidebar > * {
    width: 100%;
  }
}

/* TOC NAV */
.pd-toc {
  margin-bottom: 0;
  padding: var(--space-4);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(247, 244, 239, 0.98) 100%);
  border: 1px solid rgba(57, 52, 47, 0.1);
  border-radius: var(--radius-md);
  box-shadow: 0 18px 34px rgba(57, 52, 47, 0.06);
}

.pd-toc__title {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

/* MOBILE: compact inline box */
@media (max-width: 768px) {
  .pd-toc {
    padding: var(--space-4) var(--space-5);
  }
}

.pd-toc ul,
.pd-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pd-toc li {
  margin-bottom: 1px;
}

/* Nested items (H3) */
.pd-toc ul ul,
.pd-toc ol ol {
  padding-left: var(--space-3);
}

/* DESKTOP: left-border indicator style */
@media (min-width: 769px) {
  .pd-toc a {
    font-family: var(--font-sans);
    font-size: var(--text-label);
    line-height: 1.4;
    color: var(--color-text-secondary);
    text-decoration: none;
    display: block;
    padding: 8px 10px 8px var(--space-3);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    box-shadow: inset 2px 0 0 transparent;
    transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
  }

  .pd-toc a:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.72);
  }

  .pd-toc a.pd-toc--active {
    color: var(--color-text-primary);
    box-shadow: inset 2px 0 0 var(--color-accent);
    font-weight: var(--weight-medium);
    background: rgba(107, 31, 42, 0.08);
  }
}

/* MOBILE: simpler link style */
@media (max-width: 768px) {
  .pd-toc a {
    font-family: var(--font-sans);
    font-size: var(--text-small);
    color: var(--color-text-secondary);
    text-decoration: none;
    display: block;
    padding: 2px 0;
    transition: color var(--transition-fast);
  }

  .pd-toc a:hover {
    color: var(--color-accent-text);
  }
}

/* SIDEBAR AD SLOT */
.pd-sidebar__ad {
  margin-bottom: var(--space-5);
}

.pd-sidebar__ad .ad-placeholder {
  width: 100%;
  height: 250px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: var(--text-label);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
}

.pd-sidebar__ad-label {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

/* FALLBACK: when ad is occupied, hide the CTA */
.pd-sidebar__ad:not(:empty) ~ .pd-sidebar__cta {
  display: none;
}

/* SIDEBAR CTA CARD — premium watermark-backed treatment.
   Mirrors .pd-premium-cta visual register at sidebar scale:
   subtle gradient surface, faint thematic watermark in the
   bottom-right, soft elevation, on-hover lift.
*/
.pd-sidebar__cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #FDFCFA 0%, #F4F0E9 100%);
  border: 1px solid rgba(57, 52, 47, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-fast);
  box-shadow: 0 18px 34px rgba(57, 52, 47, 0.06);
}

.pd-sidebar__cta:hover {
  border-color: rgba(107, 31, 42, 0.18);
  box-shadow: 0 24px 44px rgba(57, 52, 47, 0.12);
  transform: translateY(-1px);
}

/* Watermark — large faint glyph anchored bottom-right.
   Same opacity / scale ratio as .pd-premium-cta__watermark.
*/
.pd-sidebar__cta-watermark {
  position: absolute;
  right: -28px;
  bottom: -28px;
  width: 168px;
  height: 168px;
  opacity: 0.07;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.pd-sidebar__cta:hover .pd-sidebar__cta-watermark {
  opacity: 0.12;
}

.pd-sidebar__cta-watermark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.pd-sidebar__cta-body {
  position: relative;
  z-index: 1;
}

/* Variant: Vegas Tracker — warm cream surface that reads
   distinct from the neutral default without breaking the brand.
*/
.pd-sidebar__cta--tracker {
  background: linear-gradient(180deg, #FBF6EE 0%, #F1E7D2 100%);
}

.pd-sidebar__cta--tracker .pd-sidebar__cta-label {
  color: #8A5A1F;
}

/* Variant: Learn Poker course — burgundy-tinted surface that
   matches .pd-premium-cta--course in the in-body course CTAs.
*/
.pd-sidebar__cta--course {
  background: linear-gradient(180deg, #F5EEE9 0%, #EDE3DA 100%);
  border-color: rgba(107, 31, 42, 0.15);
}

.pd-sidebar__cta--course .pd-sidebar__cta-room {
  color: var(--color-accent-text);
}

.pd-sidebar__cta--course .pd-sidebar__cta-label {
  color: var(--color-accent-text);
}

.pd-sidebar__cta-label {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.pd-sidebar__cta-room {
  font-family: var(--font-serif);
  font-size: var(--text-h3);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-2);
}

.pd-sidebar__cta-hook {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.pd-sidebar__cta-note {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-4);
}

.pd-sidebar__cta-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.pd-sidebar__cta-link {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  color: var(--color-text-on-dark);
  background: linear-gradient(180deg, #6B1F2A 0%, #4E0816 100%);
  text-decoration: none;
  border-radius: var(--radius-btn);
  padding: 8px 16px;
  text-align: center;
  transition: background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  box-shadow: 0 1px 3px rgba(107, 31, 42, 0.25), 0 1px 2px rgba(0, 0, 0, 0.08);
}

.pd-sidebar__cta-link:hover {
  background: linear-gradient(180deg, #5A1923 0%, #3D0F15 100%);
  color: var(--color-text-on-dark);
  box-shadow: 0 3px 8px rgba(107, 31, 42, 0.3), 0 1px 3px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}

.pd-sidebar__cta-review {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 6px 2px 0;
}

.pd-sidebar__cta-review:hover {
  color: var(--color-accent-text);
}

/* On mobile, sidebar ad and CTA follow standard sidebar visibility (hidden via .pd-sidebar order) */