/**
 * Single-post table of contents:
 * - Mobile / narrow: collapsible block at top of article body
 * - Wide desktop with side room: fixed rail on the right
 */

.msm-article-toc {
  --msm-toc-accent: #c45c26;
  --msm-toc-border: #e5e2dc;
  --msm-toc-bg: #faf9f7;
  --msm-toc-text: #333;
  --msm-toc-muted: #666;
  box-sizing: border-box;
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--msm-toc-text);
}

.msm-article-toc *,
.msm-article-toc *::before,
.msm-article-toc *::after {
  box-sizing: border-box;
}

.msm-article-toc--inline {
  margin: 0 0 1.5em;
  border: 1px solid var(--msm-toc-border);
  border-radius: 8px;
  background: var(--msm-toc-bg);
}

.msm-article-toc--inline.is-hidden {
  display: none !important;
}

.msm-article-toc__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin: 0;
  padding: 0.7em 0.95em;
  border: 0 !important;
  border-radius: 8px 8px 0 0;
  background: #6b7280 !important;
  background-image: none !important;
  color: #fff !important;
  font: inherit;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  box-shadow: none !important;
  text-decoration: none !important;
}

.msm-article-toc__toggle:hover,
.msm-article-toc__toggle:focus,
.msm-article-toc__toggle:active {
  background: #5b6470 !important;
  background-image: none !important;
  color: #fff !important;
  box-shadow: none !important;
}

.msm-article-toc:not(.is-open) .msm-article-toc__toggle {
  border-radius: 8px;
}

.msm-article-toc__chevron {
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  margin-left: 0.75em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.msm-article-toc.is-open .msm-article-toc__chevron {
  transform: rotate(-135deg);
  margin-top: 0.25em;
}

.msm-article-toc__panel {
  display: none;
  padding: 0 0.95em 0.85em;
}

.msm-article-toc.is-open .msm-article-toc__panel {
  display: block;
}

.msm-article-toc__title {
  display: none;
  margin: 0 0 0.55em;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--msm-toc-muted);
}

.msm-article-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.msm-article-toc__list li {
  margin: 0;
  padding: 0;
}

.msm-article-toc__list a {
  display: block;
  padding: 0.35em 0.45em;
  border-radius: 4px;
  color: var(--msm-toc-text);
  text-decoration: none;
  border-left: 2px solid transparent;
}

.msm-article-toc__list a:hover {
  background: rgba(0, 0, 0, 0.04);
  color: #111;
}

.msm-article-toc__list a.is-active {
  border-left-color: var(--msm-toc-accent);
  background: rgba(196, 92, 38, 0.08);
  color: #111;
  font-weight: 600;
}

/* Floating rail (wide screens with margin beside article) */
.msm-article-toc--rail {
  position: fixed;
  z-index: 40;
  top: 9.5rem;
  width: 11.5rem;
  max-height: calc(100vh - 11.5rem);
  overflow: auto;
  padding: 0.75rem 0.65rem;
  border: 1px solid var(--msm-toc-border);
  border-radius: 8px;
  background: rgba(250, 249, 247, 0.96);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  backdrop-filter: blur(6px);
}

.msm-article-toc--rail .msm-article-toc__toggle {
  display: none;
}

.msm-article-toc--rail .msm-article-toc__panel {
  display: block;
  padding: 0;
}

.msm-article-toc--rail .msm-article-toc__title {
  display: block;
  padding: 0 0.25em;
}

.msm-article-toc--rail .msm-article-toc__list a {
  font-size: 0.8rem;
  padding: 0.28em 0.4em;
}

.msm-article-toc--rail.is-hidden {
  display: none;
}

.molsimulx-article-body h2[id],
.entry-content .molsimulx-article-body h2[id] {
  scroll-margin-top: 5.5rem;
}

@media (max-width: 1099px) {
  .msm-article-toc--rail {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .msm-article-toc__chevron {
    transition: none;
  }
}