/* ============================================================
   CHAIN — Thread page supplemental styles
   ============================================================ */

/* Screenreader utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Thread hero dark bg overrides for light mode */
[data-theme="light"] .thread-page-hero {
  background: #111111;
}

/* Causal chain: hide node dot text on small screens */
@media (max-width: 500px) {
  .causal-node__dot span {
    display: none;
  }
  .causal-chain::before {
    left: 15px;
  }
  .causal-node__dot {
    width: 30px;
    height: 30px;
  }
}

/* Active chapter nav item in dark mode */
[data-theme="dark"] .chapter-nav__item.is-active {
  background: rgba(224, 122, 0, .15);
}

[data-theme="dark"] .chapter-nav__item.is-active .chapter-nav__item-title {
  color: var(--amber-300);
}

/* Dark mode: evidence box, read next */
[data-theme="dark"] .evidence-box,
[data-theme="dark"] .read-next,
[data-theme="dark"] .chapter-nav {
  background: var(--ink-800);
  border-color: var(--ink-700);
}

[data-theme="dark"] .evidence-box__header,
[data-theme="dark"] .chapter-nav__title {
  background: var(--ink-700);
  border-color: var(--ink-600);
}

[data-theme="dark"] .chapter-nav__item:hover {
  background: rgba(255,255,255,.04);
}

/* Smooth chapter highlight scroll */
.chapter {
  transition: opacity 0.3s ease;
}

/* Pull quote dark mode */
[data-theme="dark"] .pull-quote {
  background: var(--ink-800);
  border-left-color: var(--sienna-500);
}

/* Stat callout dark mode */
[data-theme="dark"] .stat-callout {
  background: var(--ink-800);
  border-color: var(--ink-700);
}

/* Responsive sidebar: show below on mobile */
@media (max-width: 959px) {
  .thread-page-layout {
    grid-template-columns: 1fr;
  }
  .thread-page-sidebar {
    position: static;
    order: -1;
  }
  .chapter-nav {
    display: none; /* Hide on mobile, shown via scroll progress */
  }
}

/* Reading progress animation */
@keyframes progress-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.reading-progress { animation: progress-in 0.5s 1s both; }

/* ============================================================
   INLINE CITATION SYSTEM
   Usage: wrap a claim in <cite-ref data-cite="key"> or use
   the .cite-ref superscript button pattern.
   ============================================================ */

/* Superscript number that triggers the tooltip */
.cite-ref {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: var(--weight-bold);
  font-family: var(--font-sans);
  font-style: normal;
  line-height: 1;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  background: rgba(var(--cite-rgb, 180,115,51), 0.15);
  border: 1px solid rgba(var(--cite-rgb, 180,115,51), 0.35);
  color: var(--acc-lt, #b87333);
  cursor: pointer;
  vertical-align: super;
  position: relative;
  top: -0.1em;
  margin: 0 1px;
  text-decoration: none;
  transition: background 0.12s, border-color 0.12s;
  /* Remove default button styles */
  -webkit-appearance: none;
  appearance: none;
  border-style: solid;
}
.cite-ref:hover,
.cite-ref:focus-visible,
.cite-ref.is-open {
  background: rgba(var(--cite-rgb, 180,115,51), 0.28);
  border-color: var(--acc-lt, #b87333);
  outline: none;
}

/* Tooltip popover */
.cite-tooltip {
  position: absolute;
  z-index: 500;
  width: 320px;
  max-width: calc(100vw - 32px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(0,0,0,0.14), 0 2px 8px rgba(0,0,0,0.08);
  padding: var(--space-4) var(--space-5);
  /* Hidden by default */
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.cite-tooltip.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
[data-theme="dark"] .cite-tooltip {
  background: var(--ink-800);
  border-color: var(--ink-700);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.cite-tooltip__type {
  font-size: 0.6rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--acc-lt, #b87333);
  margin-bottom: var(--space-1);
}
.cite-tooltip__title {
  font-size: var(--type-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  line-height: 1.4;
  margin-bottom: 3px;
}
.cite-tooltip__detail {
  font-size: var(--type-xs);
  color: var(--color-text-secondary);
  line-height: 1.55;
}
.cite-tooltip__arrow {
  position: absolute;
  width: 10px;
  height: 10px;
  background: inherit;
  border: inherit;
  border-right: none;
  border-bottom: none;
  transform: rotate(45deg);
  top: -6px;
  left: 18px;
}

/* Entry sources accordion */
.entry-sources {
  margin-top: var(--space-7);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-5);
}
.entry-sources__toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: var(--type-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  transition: color 0.12s;
}
.entry-sources__toggle:hover {
  color: var(--acc-lt, #b87333);
}
.entry-sources__toggle svg {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.entry-sources__toggle.is-open svg {
  transform: rotate(180deg);
}
.entry-sources__toggle.is-open {
  color: var(--acc-lt, #b87333);
}
.entry-sources__list {
  display: none;
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.entry-sources__list.is-hidden {
  display: none;
}
.entry-sources__item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: var(--space-3);
  align-items: start;
}
.entry-sources__num {
  font-size: var(--type-xs);
  font-weight: var(--weight-bold);
  color: var(--acc-lt, #b87333);
  font-family: var(--font-sans);
  line-height: 1.6;
}
.entry-sources__text {
  font-size: var(--type-xs);
  color: var(--color-text-secondary);
  line-height: 1.65;
}
.entry-sources__text em {
  font-style: italic;
  color: var(--color-text-secondary);
  font-weight: normal;
}
.entry-sources__text a {
  color: var(--acc-lt, #b87333);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
.entry-sources__text a:hover {
  opacity: 0.8;
}

/* Source cite tooltip (legacy stub) */
.source-cite {
  position: relative;
}

/* ============================================================
   THREAD TIMELINE BAND
   Full-width horizontal scrollable overview timeline.
   Sits between the argument bar and the main entry list.
   Data source: window.THREAD_TIMELINE_BAND = { range, nodes[] }
   ============================================================ */

.tl-band {
  background: var(--ink-900);
  border-bottom: 1px solid rgba(255,255,255,.06);
  position: relative;
}
[data-theme="light"] .tl-band {
  background: #141414;
}

.tl-band__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6) 0;
  max-width: 1280px;
  margin: 0 auto;
  gap: var(--space-4);
}
.tl-band__title {
  font-size: 0.65rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--ink-500);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.tl-band__title-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--acc, #fbbf24);
  opacity: 0.7;
  flex-shrink: 0;
}
.tl-band__range {
  font-size: 0.65rem;
  font-weight: var(--weight-semibold);
  color: var(--ink-600);
  letter-spacing: 0.04em;
}

.tl-band__scroll {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: var(--space-5) var(--space-6) var(--space-6);
  cursor: grab;
}
.tl-band__scroll:active { cursor: grabbing; }
.tl-band__scroll::-webkit-scrollbar { display: none; }

.tl-band__track {
  display: flex;
  align-items: flex-end;
  gap: 0;
  position: relative;
  min-width: max-content;
  padding-bottom: 32px;
}
.tl-band__track::after {
  content: '';
  position: absolute;
  bottom: 14px;
  left: 24px;
  right: 24px;
  height: 2px;
  background: linear-gradient(to right,
    transparent 0%,
    rgba(255,255,255,.08) 4%,
    rgba(255,255,255,.12) 50%,
    rgba(255,255,255,.08) 96%,
    transparent 100%
  );
  z-index: 0;
}

.tl-band__progress-line {
  position: absolute;
  bottom: 14px;
  left: 24px;
  height: 2px;
  background: linear-gradient(to right, var(--acc, #fbbf24), rgba(251,191,36,.3));
  width: 0%;
  z-index: 1;
  transition: width 0.4s ease;
  border-radius: 1px;
}

.tl-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 140px;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
  cursor: pointer;
  padding-bottom: 32px;
}
.tl-node:first-child { padding-left: 24px; }
.tl-node:last-child  { padding-right: 24px; }

.tl-node__card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 8px;
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-3);
  width: 116px;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
  position: relative;
}
.tl-node:hover .tl-node__card,
.tl-node.is-active .tl-node__card {
  background: rgba(var(--acc-rgb, 251,191,36), 0.1);
  border-color: rgba(var(--acc-rgb, 251,191,36), 0.25);
  transform: translateY(-2px);
}
.tl-node__card-label {
  font-size: 0.68rem;
  font-weight: var(--weight-semibold);
  color: var(--ink-300);
  line-height: 1.35;
  transition: color 0.15s;
}
.tl-node:hover .tl-node__card-label,
.tl-node.is-active .tl-node__card-label {
  color: #fff;
}
.tl-node__card-note {
  font-size: 0.6rem;
  color: var(--ink-500);
  margin-top: 2px;
  line-height: 1.3;
}
.tl-node.is-active .tl-node__card-note {
  color: rgba(var(--acc-rgb, 251,191,36), 0.7);
}

.tl-node__stem {
  width: 1px;
  height: 12px;
  background: rgba(255,255,255,.12);
  transition: background 0.15s;
  flex-shrink: 0;
}
.tl-node.is-active .tl-node__stem {
  background: rgba(var(--acc-rgb, 251,191,36), 0.5);
}

.tl-node__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.2);
  background: var(--ink-900);
  position: absolute;
  bottom: 9px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  transition: border-color 0.15s, background 0.15s, width 0.15s, height 0.15s, bottom 0.15s;
}
[data-theme="light"] .tl-node__dot { background: #141414; }
.tl-node:hover .tl-node__dot {
  border-color: rgba(var(--acc-rgb, 251,191,36), 0.5);
  width: 14px; height: 14px; bottom: 8px;
}
.tl-node.is-active .tl-node__dot {
  border-color: var(--acc, #fbbf24);
  background: var(--acc, #fbbf24);
  width: 16px; height: 16px; bottom: 7px;
  box-shadow: 0 0 0 4px rgba(var(--acc-rgb, 251,191,36), 0.2);
}

.tl-node__year {
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.58rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.04em;
  color: var(--ink-600);
  white-space: nowrap;
  transition: color 0.15s;
}
.tl-node:hover .tl-node__year,
.tl-node.is-active .tl-node__year {
  color: rgba(var(--acc-rgb, 251,191,36), 0.8);
}

.tl-node__icon {
  position: absolute;
  top: -8px;
  right: -6px;
  font-size: 0.72rem;
  line-height: 1;
  background: rgba(var(--acc-rgb, 251,191,36), 0.15);
  border: 1px solid rgba(var(--acc-rgb, 251,191,36), 0.2);
  border-radius: 4px;
  padding: 1px 3px;
}

.tl-band__fade-left,
.tl-band__fade-right {
  position: absolute;
  top: 0; bottom: 0;
  width: 48px;
  pointer-events: none;
  z-index: 4;
}
.tl-band__fade-left  { left: 0;  background: linear-gradient(to right, var(--ink-900), transparent); }
.tl-band__fade-right { right: 0; background: linear-gradient(to left,  var(--ink-900), transparent); }
[data-theme="light"] .tl-band__fade-left  { background: linear-gradient(to right, #141414, transparent); }
[data-theme="light"] .tl-band__fade-right { background: linear-gradient(to left,  #141414, transparent); }

.tl-band__hint {
  position: absolute;
  right: var(--space-5);
  bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.6rem;
  color: var(--ink-600);
  pointer-events: none;
  transition: opacity 0.4s;
}
.tl-band__hint svg { opacity: 0.6; }
.tl-band__hint.is-hidden { opacity: 0; }

.tl-node:focus-visible .tl-node__card {
  outline: 2px solid var(--acc, #fbbf24);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .tl-node { width: 110px; }
  .tl-node__card { width: 88px; }
  .tl-band__header { padding: var(--space-3) var(--space-4) 0; }
  .tl-band__scroll { padding: var(--space-4) var(--space-4) var(--space-5); }
}

/* ============================================================
   ENTRY TIMELINE EMBED
   Horizontal scrollable milestone timeline inside a thread entry.
   Usage: <div class="entry-timeline" data-timeline-id="KEY"></div>
   ============================================================ */

.entry-timeline {
  margin-top: var(--space-7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  overflow: hidden;
}
[data-theme="dark"] .entry-timeline {
  background: var(--ink-800);
  border-color: var(--ink-700);
}

/* Header bar with toggle */
.entry-timeline__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  user-select: none;
  gap: var(--space-3);
}
[data-theme="dark"] .entry-timeline__header {
  border-color: var(--ink-700);
}
.entry-timeline__header:hover {
  background: rgba(0,0,0,.025);
}
[data-theme="dark"] .entry-timeline__header:hover {
  background: rgba(255,255,255,.03);
}
.entry-timeline__label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--type-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}
.entry-timeline__label-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.7;
}
.entry-timeline__toggle-icon {
  flex-shrink: 0;
  color: var(--color-text-tertiary);
  transition: transform 0.22s ease;
}
.entry-timeline.is-open .entry-timeline__toggle-icon {
  transform: rotate(180deg);
}

/* Scrollable track */
.entry-timeline__body {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
  padding: var(--space-6) var(--space-5) var(--space-5);
  display: none;
}
.entry-timeline__body::-webkit-scrollbar { height: 4px; }
.entry-timeline__body::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }
.entry-timeline.is-open .entry-timeline__body {
  display: block;
}

/* The horizontal rail */
.entry-timeline__track {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
  min-width: max-content;
}

/* Connecting line between nodes */
.entry-timeline__track::before {
  content: '';
  position: absolute;
  top: 16px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}
[data-theme="dark"] .entry-timeline__track::before {
  background: var(--ink-600);
}

/* Individual milestone node */
.etl-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 120px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  cursor: default;
}
.etl-node:hover .etl-node__dot {
  transform: scale(1.2);
}

/* The dot */
.etl-node__dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--acc, #fbbf24);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: transform 0.15s ease, background 0.15s ease;
  margin-bottom: var(--space-2);
}
[data-theme="dark"] .etl-node__dot {
  background: var(--ink-800);
}
.etl-node:hover .etl-node__dot,
.etl-node.is-highlighted .etl-node__dot {
  background: rgba(var(--acc-rgb, 251,191,36), 0.18);
}
.etl-node.is-highlighted .etl-node__dot {
  border-width: 3px;
  box-shadow: 0 0 0 4px rgba(var(--acc-rgb, 251,191,36), 0.15);
}
.etl-node__dot-inner {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--acc, #fbbf24);
  transition: transform 0.15s ease;
}
.etl-node:hover .etl-node__dot-inner {
  transform: scale(1.3);
}

/* Year label */
.etl-node__year {
  font-size: 0.65rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.04em;
  color: var(--acc-lt, #b87333);
  margin-bottom: 3px;
  text-align: center;
  white-space: nowrap;
}

/* Event label */
.etl-node__event {
  font-size: 0.68rem;
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  line-height: 1.35;
  text-align: center;
  padding: 0 4px;
}

/* Note (optional sub-text) */
.etl-node__note {
  font-size: 0.62rem;
  color: var(--color-text-tertiary);
  text-align: center;
  line-height: 1.4;
  margin-top: 2px;
  padding: 0 4px;
}

/* Type icon inside dot  */
.etl-node__icon {
  font-size: 0.8rem;
  line-height: 1;
}

/* Responsive: allow normal scroll on mobile */
@media (max-width: 640px) {
  .etl-node { width: 100px; }
  .entry-timeline__label span { display: none; }
}

/* ============================================================
   PRINT STYLESHEET
   Optimised for printing thread pages and long-form articles.
   ============================================================ */
@media print {
  /* Hide chrome */
  .site-nav,
  .utility-bar,
  .mobile-nav,
  .search-overlay,
  .reading-progress,
  .chapter-nav,
  .thread-page-sidebar,
  .thread-bottom-cta,
  .site-footer,
  .hero-scroll-hint,
  [aria-label="Thread navigation"] { display: none !important; }

  /* Reset backgrounds */
  * { background: #fff !important; color: #000 !important; box-shadow: none !important; text-shadow: none !important; }

  /* Readable typography */
  body { font-size: 12pt; line-height: 1.6; font-family: Georgia, serif; }
  h1 { font-size: 24pt; margin-bottom: 12pt; }
  h2 { font-size: 18pt; margin-bottom: 8pt; }
  h3 { font-size: 14pt; margin-bottom: 6pt; }

  /* Full-width layout */
  .thread-page-layout,
  .thread-layout,
  .container { display: block !important; width: 100% !important; max-width: 100% !important; }

  /* Show URLs for external links */
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 9pt; color: #555 !important; }

  /* Avoid page breaks inside key sections */
  .chapter,
  .entry-item,
  .stat-callout,
  .pull-quote,
  .evidence-box { page-break-inside: avoid; break-inside: avoid; }

  /* Reveal all scroll-hidden elements */
  .reveal { opacity: 1 !important; transform: none !important; }

  /* Images */
  img { max-width: 100% !important; page-break-inside: avoid; }

  /* Pull quotes */
  .pull-quote { border-left: 3pt solid #000 !important; padding-left: 12pt; margin: 12pt 0; }

  /* Callout boxes */
  .stat-callout,
  .evidence-box { border: 1pt solid #ccc !important; padding: 8pt; margin: 8pt 0; }
}

/* ============================================================
   READING PROGRESS BAR (auto-injected)
   ============================================================ */
#chain-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #f97316, #fbbf24);
  z-index: 9999;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* ============================================================
   BOOKMARK BUTTON (auto-injected into sidebar)
   ============================================================ */
.bookmark-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: var(--type-sm);
  font-family: inherit;
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
}
.bookmark-btn:hover {
  border-color: #f97316;
  color: #f97316;
}
.bookmark-btn.is-saved {
  background: rgba(249,115,22,.10);
  border-color: rgba(249,115,22,.4);
  color: #f97316;
}
.bookmark-btn__icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}
.bookmark-btn.is-saved .bookmark-btn__icon {
  fill: #f97316;
}
[data-theme="dark"] .bookmark-btn {
  background: var(--ink-800);
  border-color: var(--ink-700);
  color: var(--ink-300);
}
[data-theme="dark"] .bookmark-btn:hover {
  border-color: #f97316;
  color: #f97316;
}
[data-theme="dark"] .bookmark-btn.is-saved {
  background: rgba(249,115,22,.12);
  border-color: rgba(249,115,22,.35);
  color: #fb923c;
}

/* ============================================================
   SAVED THREADS PANEL (shown on threads.html if bookmarks exist)
   ============================================================ */
.saved-threads-banner {
  background: rgba(249,115,22,.08);
  border: 1px solid rgba(249,115,22,.25);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-6);
  display: none;
}
.saved-threads-banner.is-visible { display: block; }
.saved-threads-banner__title {
  font-size: var(--type-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: #f97316;
  margin-bottom: var(--space-3);
}
.saved-threads-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.saved-thread-chip {
  font-size: var(--type-xs);
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(249,115,22,.12);
  border: 1px solid rgba(249,115,22,.25);
  color: #f97316;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s;
}
.saved-thread-chip:hover { background: rgba(249,115,22,.22); }
.saved-thread-chip__remove {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
  font-size: 0.7rem;
  line-height: 1;
  opacity: 0.6;
}
.saved-thread-chip__remove:hover { opacity: 1; }

/* ============================================================
   AUDIT FIXES — Sidebar, Mobile, Motion, Layout
   ============================================================ */

/* ---- Flexible sidebar column (was fixed 300px) ------------ */
@media (min-width: 960px) {
  .thread-page-layout {
    grid-template-columns: 1fr minmax(280px, 320px);
  }
}

/* ---- Sidebar: scrollable when content overflows ----------- */
.thread-page-sidebar {
  max-height: calc(100vh - var(--nav-total) - var(--space-6));
  overflow-y: auto;
  overflow-x: hidden;
  /* Custom scrollbar — thin, unobtrusive */
  scrollbar-width: thin;
  scrollbar-color: var(--ink-700) transparent;
}
.thread-page-sidebar::-webkit-scrollbar { width: 4px; }
.thread-page-sidebar::-webkit-scrollbar-track { background: transparent; }
.thread-page-sidebar::-webkit-scrollbar-thumb {
  background: var(--ink-700);
  border-radius: var(--radius-pill);
}

/* ---- Mobile: entry number sizing -------------------------  */
@media (max-width: 599px) {
  .entry-item__num {
    font-size: 0.65rem;
    min-width: 28px;
    height: 28px;
  }

  /* Tighten up chapter body text on small screens */
  .chapter__body {
    font-size: 1rem;
  }

  /* Pull quote: reduce indent on mobile */
  .pull-quote {
    padding: var(--space-4) var(--space-5);
    margin: var(--space-6) 0;
  }
}

/* ---- Reduced motion: thread-page specific animations ------- */
@media (prefers-reduced-motion: reduce) {
  /* Chapter opacity transition */
  .chapter {
    transition: none !important;
  }

  /* Reading progress bar entrance */
  .reading-progress {
    animation: none !important;
  }

  /* Progress bar injected element */
  #chain-progress-bar {
    transition: none !important;
  }
}

/* ---- Dark mode: better sidebar card borders ---------------- */
[data-theme="dark"] .read-next__item:hover {
  opacity: 0.85;
}

/* ---- Body text line-length cap (wider than 75ch base) ------ */
.chapter__body {
  max-width: 72ch;
}

/* ---- Causal chain: ensure left-line aligns on all screens -- */
@media (min-width: 501px) {
  .causal-chain::before {
    left: 19px;
  }
}

/* =========================================================
   THREAD BREADCRUMB
   ========================================================= */
.thread-breadcrumb {
  background: var(--ink-900);
  border-bottom: 1px solid rgba(255,255,255,.07);
  padding: var(--space-2) 0;
}

.thread-breadcrumb__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
}

.thread-breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.thread-breadcrumb__link {
  font-size: 0.75rem;
  color: var(--ink-500);
  text-decoration: none;
  font-weight: var(--weight-medium);
  transition: color var(--duration-fast);
  white-space: nowrap;
}

.thread-breadcrumb__link:hover {
  color: var(--ink-200);
}

.thread-breadcrumb__sep {
  font-size: 0.7rem;
  color: var(--ink-700);
  margin: 0 var(--space-1);
  user-select: none;
}

.thread-breadcrumb__item--current {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.thread-breadcrumb__era-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.thread-breadcrumb__era-label {
  font-size: 0.75rem;
  font-weight: var(--weight-semibold);
  color: var(--ink-200);
  white-space: nowrap;
}

/* =========================================================
   RELATED THREADS SECTION
   ========================================================= */
.related-threads-section {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0;
}

[data-theme="dark"] .related-threads-section {
  background: var(--ink-900);
  border-top-color: var(--ink-800);
}

.related-threads__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-7);
  flex-wrap: wrap;
}

.related-threads__title {
  font-family: var(--font-editorial);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 900;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.related-threads__all-link {
  font-size: var(--type-sm);
  font-weight: var(--weight-semibold);
  color: #fbbf24;
  text-decoration: none;
  white-space: nowrap;
  transition: opacity var(--duration-fast);
}

.related-threads__all-link:hover {
  opacity: 0.8;
}

.related-threads__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 640px) {
  .related-threads__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .related-threads__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Individual related thread card */
.rel-thread-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--rel-acc, #fbbf24);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  text-decoration: none;
  transition: transform var(--duration-fast), box-shadow var(--duration-fast), border-top-color var(--duration-fast);
  position: relative;
}

[data-theme="dark"] .rel-thread-card {
  background: var(--ink-800);
  border-color: var(--ink-700);
}

.rel-thread-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(var(--rel-acc-rgb, 251,191,36), .15);
}

.rel-thread-card__era {
  font-size: 0.68rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1.4;
}

.rel-thread-card__title {
  font-size: var(--type-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  line-height: 1.4;
  flex: 1;
}

.rel-thread-card:hover .rel-thread-card__title {
  color: var(--rel-acc, #fbbf24);
}

.rel-thread-card__arrow {
  font-size: var(--type-sm);
  color: var(--color-text-tertiary);
  margin-top: auto;
  transition: transform var(--duration-fast), color var(--duration-fast);
}

.rel-thread-card:hover .rel-thread-card__arrow {
  transform: translateX(4px);
  color: var(--rel-acc, #fbbf24);
}