/* Citadel Article Index Module
   Production module promoted from the approved v20 preview baseline.
   Rules: no guessed navbar offsets, no internal article scroll, no scroll-capture. */

:root {
  --ck-article-index-width: 280px;
  --ck-article-index-gap: clamp(26px, 4vw, 48px);
  --ck-article-index-radius: 22px;
  --ck-article-index-bg: rgba(255, 255, 255, 0.9);
  --ck-article-index-border: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.34);
  --ck-article-index-active-bg: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.18);
  --ck-article-index-shadow: 0 24px 70px rgba(0, 0, 0, 0.13);
  --ck-mobile-reading-progress-top: 0px;
  --ck-mobile-reading-progress-height: 4px;
}

.article-index-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(230px, var(--ck-article-index-width)) minmax(0, 1fr);
  align-items: start;
  gap: var(--ck-article-index-gap);
  max-width: var(--ck-container, 1180px);
  margin-inline: auto;
}

.article-index-rail {
  position: relative;
  grid-column: 1;
  min-height: 100%;
}

.article-index-layout .article-body,
.article-index-layout .ck-article {
  grid-column: 2;
  max-width: var(--ck-article-width, 820px);
  margin-left: 0;
}

.article-index-toc {
  position: relative;
  z-index: var(--ck-article-index-z, 5);
  padding: var(--ck-article-index-padding, 22px);
  border: 1px solid var(--ck-article-index-border);
  border-radius: var(--ck-article-index-radius);
  background: var(--ck-article-index-bg);
  box-shadow: var(--ck-article-index-shadow);
  color: var(--ck-color-ink, var(--ink, #141414));
  backdrop-filter: blur(var(--ck-article-index-blur, 18px));
  transform: translate3d(0, 0, 0);
  will-change: transform;
}

.article-index-title {
  margin: 0 0 4px;
  color: var(--ck-color-ink, var(--ink, #141414));
  font-family: var(--ck-font-display, var(--font-display, Georgia, "Times New Roman", serif));
  font-size: var(--ck-article-index-title-size, 1.22rem);
  font-weight: 600;
  line-height: 1.2;
}

.article-index-note {
  margin: 0 0 16px;
  color: var(--ck-color-muted, var(--muted, #6d675d));
  font-size: var(--ck-article-index-note-size, 0.86rem);
  line-height: 1.5;
}

.article-index-progress {
  height: 4px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--ck-article-index-progress-bg, rgba(var(--ck-rgb-ink, var(--rgb-ink, 20, 20, 20)), 0.1));
  margin: 0 0 18px;
  pointer-events: none;
}

.article-index-progress span,
.mobile-reading-progress span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--ck-color-gold, var(--gold, #d4af37)), var(--ck-color-gold-muted, #f5dc89));
}

.article-index-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--ck-article-index-link-gap, 7px);
  counter-reset: article-index;
}

.article-index-toc a,
.article-index-toc a:visited,
.article-index-toc a:active,
.article-index-toc a:focus {
  counter-increment: article-index;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 9px;
  align-items: start;
  padding: var(--ck-article-index-link-padding, 9px 10px);
  border: 1px solid transparent;
  border-radius: var(--ck-article-index-link-radius, 14px);
  color: var(--ck-color-ink, var(--ink, #141414));
  background: transparent;
  font-size: var(--ck-article-index-link-size, 0.88rem);
  line-height: 1.35;
  text-decoration: none;
  outline-offset: 2px;
  transition:
    background-color var(--ck-transition, 180ms ease),
    border-color var(--ck-transition, 180ms ease),
    color var(--ck-transition, 180ms ease),
    transform var(--ck-transition, 180ms ease);
}

.article-index-toc a::before {
  content: counter(article-index, decimal-leading-zero);
  color: var(--ck-color-gold, var(--gold, #d4af37));
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.article-index-toc a:hover,
.article-index-toc a.is-active,
.article-index-toc a.is-active:visited,
.article-index-toc a.is-active:active,
.article-index-toc a.is-active:focus {
  background: var(--ck-article-index-active-bg);
  border-color: var(--ck-article-index-active-border, rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.3));
  color: var(--ck-color-ink, var(--ink, #141414));
  transform: translateX(2px);
}

.article-index-back-top,
.article-index-back-top:visited,
.article-index-back-top:active,
.article-index-back-top:focus {
  display: inline-flex;
  margin-top: 18px;
  color: var(--ck-article-index-back-color, #5c4b11);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.article-body > h2[id],
.ck-article > h2[id] {
  scroll-margin-top: calc(var(--ck-nav-space, var(--nav-space, 88px)) + 72px);
}

.mobile-reading-progress {
  display: none;
}

[data-theme="dark"] .article-index-toc,
[data-theme="citadel-of-ak-dark"] .article-index-toc,
[data-theme^="citadel-of-kang-dark"] .article-index-toc {
  border-color: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.45);
  background: var(--ck-article-index-dark-bg, rgba(6, 6, 6, 0.92));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  color: #fff8e6;
}

[data-theme="dark"] .article-index-title,
[data-theme="citadel-of-ak-dark"] .article-index-title,
[data-theme^="citadel-of-kang-dark"] .article-index-title {
  color: #fff8e6;
}

[data-theme="dark"] .article-index-note,
[data-theme="citadel-of-ak-dark"] .article-index-note,
[data-theme^="citadel-of-kang-dark"] .article-index-note {
  color: rgba(255, 248, 230, 0.74);
}

[data-theme="dark"] .article-index-toc a,
[data-theme="dark"] .article-index-toc a:visited,
[data-theme="citadel-of-ak-dark"] .article-index-toc a,
[data-theme="citadel-of-ak-dark"] .article-index-toc a:visited,
[data-theme^="citadel-of-kang-dark"] .article-index-toc a,
[data-theme^="citadel-of-kang-dark"] .article-index-toc a:visited {
  color: rgba(255, 248, 230, 0.92);
  background: rgba(255, 255, 255, 0.018);
  border-color: rgba(255, 255, 255, 0.045);
}

[data-theme="dark"] .article-index-toc a:hover,
[data-theme="citadel-of-ak-dark"] .article-index-toc a:hover,
[data-theme^="citadel-of-kang-dark"] .article-index-toc a:hover {
  color: #fff8e6;
  background: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.11);
  border-color: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.38);
}

[data-theme="dark"] .article-index-toc a.is-active,
[data-theme="dark"] .article-index-toc a.is-active:visited,
[data-theme="dark"] .article-index-toc a.is-active:active,
[data-theme="dark"] .article-index-toc a.is-active:focus,
[data-theme="citadel-of-ak-dark"] .article-index-toc a.is-active,
[data-theme="citadel-of-ak-dark"] .article-index-toc a.is-active:visited,
[data-theme="citadel-of-ak-dark"] .article-index-toc a.is-active:active,
[data-theme="citadel-of-ak-dark"] .article-index-toc a.is-active:focus,
[data-theme^="citadel-of-kang-dark"] .article-index-toc a.is-active,
[data-theme^="citadel-of-kang-dark"] .article-index-toc a.is-active:visited,
[data-theme^="citadel-of-kang-dark"] .article-index-toc a.is-active:active,
[data-theme^="citadel-of-kang-dark"] .article-index-toc a.is-active:focus {
  color: #fff8e6;
  background: linear-gradient(90deg, rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.17), rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.075));
  border-color: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.58);
  box-shadow: inset 0 0 0 1px rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.13);
}

[data-theme="dark"] .article-index-progress,
[data-theme="citadel-of-ak-dark"] .article-index-progress,
[data-theme^="citadel-of-kang-dark"] .article-index-progress {
  background: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .article-meta span,
[data-theme="citadel-of-ak-dark"] .article-meta span,
[data-theme^="citadel-of-kang-dark"] .article-meta span {
  color: rgba(255, 238, 184, 0.92);
  background: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.095);
  border-color: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.38);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.025);
}

@media (prefers-reduced-motion: reduce) {
  .article-index-toc a {
    transition: none !important;
  }
}

@media (max-width: 920px) {
  .article-index-layout {
    grid-template-columns: 1fr;
    gap: 1.35rem;
  }

  .article-index-rail {
    grid-column: 1;
    min-height: 0;
  }

  .article-index-layout .article-body,
  .article-index-layout .ck-article {
    grid-column: 1;
    max-width: var(--ck-article-width, 820px);
    margin-left: auto;
    margin-right: auto;
  }

  .article-index-toc {
    transform: none !important;
    order: -1;
    grid-column: 1;
    border-radius: var(--ck-article-index-mobile-radius, 24px);
    padding: var(--ck-article-index-mobile-padding, 18px);
  }

  .article-index-progress {
    display: none;
  }

  .article-index-toc ol {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .article-index-toc a {
    padding: 10px;
  }

  .mobile-reading-progress {
    position: fixed;
    top: var(--ck-mobile-reading-progress-top);
    left: 0;
    right: 0;
    z-index: var(--ck-mobile-reading-progress-z, 9999);
    display: block;
    height: var(--ck-mobile-reading-progress-height);
    background: rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.22);
    pointer-events: none;
  }

  .mobile-reading-progress span {
    width: 8%;
    min-width: 30px;
    box-shadow: 0 0 18px rgba(var(--ck-rgb-gold, var(--rgb-gold, 212, 175, 55)), 0.46);
  }

  body.menu-open .mobile-reading-progress,
  body.drawer-open .mobile-reading-progress,
  body.nav-open .mobile-reading-progress {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
  }
}

/* Keep long titles shrinkable at every width. Overflow containment is mobile-only. */
.article-index-layout,
.article-index-rail,
.article-index-toc,
.article-index-layout .article-body,
.article-index-layout .ck-article {
  min-width: 0;
  max-width: 100%;
}

.article-index-layout {
  width: 100%;
}

.article-index-rail,
.article-index-toc {
  width: 100%;
}

.article-index-toc ol,
.article-index-toc li {
  min-width: 0;
  max-width: 100%;
}

.article-index-toc a,
.article-index-toc a:visited,
.article-index-toc a:active,
.article-index-toc a:focus {
  grid-template-columns: 28px minmax(0, 1fr);
  min-width: 0;
  max-width: 100%;
  overflow-wrap: anywhere;
  word-break: normal;
  hyphens: none;
}

.article-index-toc a::before {
  min-width: 0;
}

@media (min-width: 921px) {
  .article-index-layout,
  .article-index-rail,
  .article-index-toc {
    overflow: visible;
  }

  .article-index-toc {
    max-height: none;
  }
}

@media (max-width: 920px) {
  .article-index-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
    max-width: 100%;
    gap: 1.15rem;
    overflow-x: clip;
  }

  .article-index-rail,
  .article-index-layout .article-body,
  .article-index-layout .ck-article {
    grid-column: 1;
    width: 100%;
    max-width: 100%;
  }

  .article-index-rail,
  .article-index-toc {
    overflow-x: clip;
  }

  .article-index-toc {
    width: 100%;
    max-width: 100%;
    max-height: none;
    padding: min(18px, 5vw);
    border-radius: 18px;
  }

  .article-index-toc a,
  .article-index-toc a:visited,
  .article-index-toc a:active,
  .article-index-toc a:focus {
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 8px;
    padding: 9px 8px;
    font-size: clamp(0.74rem, 2.8vw, 0.88rem);
    line-height: 1.45;
    transform: none;
  }

  .article-index-toc a:hover,
  .article-index-toc a.is-active,
  .article-index-toc a.is-active:visited,
  .article-index-toc a.is-active:active,
  .article-index-toc a.is-active:focus {
    transform: none;
  }
}

@media (max-width: 480px) {
  .article-index-toc {
    padding: 14px;
  }

  .article-index-title {
    font-size: 1.02rem;
  }

  .article-index-note {
    font-size: 0.78rem;
  }
}

/* Citadel Article Index public note suppression v22 */
.article-index-note {
  display: none !important;
}