/* Reading progress bar and section navigation for long guides.
   Kept out of styles.css so adding it does not cache-bust every page. */

.read-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--terracotta, #C4714F); z-index: 120;
  transition: width .08s linear;
}
@media (prefers-reduced-motion: reduce) { .read-progress { transition: none; } }

/* Mobile and tablet: a collapsible jump list inside the article */
.toc-inline {
  border: 1px solid rgba(51,50,42,.14); border-radius: var(--radius, 14px);
  padding: 14px 18px; margin: 24px 0; background: rgba(255,255,255,.55);
}
.toc-inline > summary {
  cursor: pointer; font-weight: 800; font-size: .95rem;
  color: var(--plum, #33322A); list-style: none;
}
.toc-inline > summary::-webkit-details-marker { display: none; }
.toc-inline > summary::after { content: " ▾"; font-size: .8rem; }
.toc-inline[open] > summary::after { content: " ▴"; }
.toc-inline ol { margin: 12px 0 0; padding-left: 18px; }
.toc-inline li { margin: 6px 0; font-size: .92rem; }
.toc-inline a { color: var(--plum-soft, #6B6A5C); text-decoration: none; }
.toc-inline a:hover { text-decoration: underline; }

/* Desktop: a sticky list beside the article */
.toc-rail { display: none; }
@media (min-width: 1180px) {
  .toc-inline { display: none; }
  .toc-rail {
    display: block; position: fixed; top: 120px; right: 28px; width: 216px;
    max-height: calc(100vh - 180px); overflow-y: auto; z-index: 40;
    padding-left: 14px; border-left: 2px solid rgba(51,50,42,.10);
  }
  .toc-rail h4 {
    margin: 0 0 10px; font-size: .72rem; letter-spacing: .08em;
    text-transform: uppercase; color: var(--plum-soft, #6B6A5C);
  }
  .toc-rail ol { list-style: none; margin: 0; padding: 0; }
  .toc-rail li { margin: 0 0 9px; line-height: 1.32; }
  .toc-rail a {
    display: block; font-size: .84rem; color: var(--plum-soft, #6B6A5C);
    text-decoration: none; border-left: 2px solid transparent;
    margin-left: -16px; padding-left: 14px;
  }
  .toc-rail a:hover { color: var(--plum, #33322A); }
  .toc-rail a.is-current {
    color: var(--plum, #33322A); font-weight: 800;
    border-left-color: var(--terracotta, #C4714F);
  }
}
@media (min-width: 1500px) { .toc-rail { right: calc((100vw - 760px) / 2 - 264px); } }

/* Anchor targets clear the sticky header when jumped to */
main h2[id] { scroll-margin-top: 90px; }