/* Runcible Guide shell — TOC-first layout (no top header bar) */
:root {
  --rg-bg: #f7f5f1;
  --rg-panel: #fffcf7;
  --rg-ink: #1c1917;
  --rg-muted: #6b635c;
  --rg-rule: #ddd4c8;
  --rg-accent: #0f5b78;
  --rg-sidebar-w: 300px;
  --rg-rail-w: 48px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body.runcible-guide {
  margin: 0;
  background: var(--rg-bg);
  color: var(--rg-ink);
  font-family: Georgia, "Times New Roman", serif;
}

.rg-shell {
  display: grid;
  grid-template-columns: var(--rg-sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  gap: 0;
  max-width: 1400px;
  margin: 0 auto;
}

/* Sidebar = logo + burger + search + TOC */
.rg-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
  padding: 16px 14px 40px;
  border-right: 1px solid var(--rg-rule);
  background: rgba(255, 252, 247, 0.96);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rg-sidebar-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.rg-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 auto;
  min-width: 0;
  line-height: 1.1;
  text-decoration: none;
  color: var(--rg-ink);
}

.rg-logo img {
  display: block;
  width: 36px;
  height: auto;
  flex: 0 0 auto;
}

.rg-logo-text {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  color: var(--rg-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rg-burger {
  appearance: none;
  border: 1px solid var(--rg-rule);
  background: var(--rg-panel);
  color: var(--rg-ink);
  width: 42px;
  height: 42px;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
  flex: 0 0 42px;
}

.rg-burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--rg-ink);
}

.rg-sidebar-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.rg-sidebar h2.rg-contents-label {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--rg-muted);
  font-family: system-ui, -apple-system, sans-serif;
}

.rg-toc-mount {
  min-width: 0;
}

body.rg-navigating main.rg-main,
main.rg-main[aria-busy="true"] {
  opacity: 0.55;
  transition: opacity 0.12s ease;
}

main.rg-main {
  transition: opacity 0.12s ease;
}

.rg-sidebar ul {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
}

.rg-sidebar li {
  margin: 0 0 6px;
}

.rg-sidebar a {
  color: var(--rg-accent);
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.35;
  font-family: system-ui, -apple-system, sans-serif;
}

.rg-sidebar a:hover {
  text-decoration: underline;
}

.rg-sidebar li.is-active > .rg-chapter-row > a,
.rg-sidebar li.is-active > a {
  font-weight: 700;
  color: var(--rg-ink);
}

.rg-chapter-row {
  display: flex;
  align-items: flex-start;
  gap: 4px;
}

.rg-chapter-row > a {
  flex: 1;
  min-width: 0;
}

.rg-toc-toggle {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--rg-muted);
  cursor: pointer;
  width: 22px;
  height: 22px;
  padding: 0;
  flex: 0 0 22px;
  line-height: 22px;
  font-size: 12px;
}

.rg-toc-toggle::before {
  content: "▸";
}

.rg-toc-item.is-expanded > .rg-chapter-row > .rg-toc-toggle::before {
  content: "▾";
}

/* Nested topics: must beat `.rg-sidebar ul { padding: 0 }` (same element) */
.rg-sidebar ul.rg-topics {
  list-style: none;
  margin: 4px 0 12px 0;
  /* Align under chapter title text (toggle 22px + gap 4px) */
  padding: 0 0 0 26px;
  display: none;
  border-left: 1px solid var(--rg-rule);
  margin-left: 10px;
}

.rg-toc-item.is-expanded > ul.rg-topics {
  display: block;
}

.rg-sidebar ul.rg-topics li {
  margin: 0 0 4px;
}

.rg-sidebar ul.rg-topics a {
  font-size: 0.86rem;
  color: var(--rg-muted);
}

.rg-sidebar ul.rg-topics li.is-active > a {
  font-weight: 650;
  color: var(--rg-ink);
}

.rg-main {
  padding: 28px 36px 80px;
  max-width: 920px;
}

.rg-crumb {
  margin: 0 0 0.75rem;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 0.85rem;
  color: var(--rg-muted);
}

.rg-crumb a {
  color: var(--rg-accent);
  text-decoration: none;
}

.rg-crumb a:hover {
  text-decoration: underline;
}

.rg-chapter-topics {
  padding-left: 1.2rem;
}

.rg-chapter-topics li {
  margin: 0.55rem 0;
  line-height: 1.4;
}

.rg-sidebar ul.rg-subtopics {
  list-style: none;
  margin: 2px 0 8px 0;
  padding: 0 0 0 12px;
  border-left: 1px solid var(--rg-rule);
}

.rg-sidebar ul.rg-subtopics a {
  font-size: 0.8rem;
  color: var(--rg-muted);
}

.rg-main h1,
.rg-main h2,
.rg-main h3,
.rg-main h4 {
  scroll-margin-top: 16px;
}

/* Standard: between topics on the same page — rule, then 50px spacer */
.rg-main h2[id] ~ h2[id] {
  border-top: 1px solid var(--rg-rule);
  margin-top: 1.5rem;
  padding-top: 50px;
}

.rg-main img {
  max-width: 100%;
  height: auto;
}

.rg-main .wp-block-image {
  margin: 1.25rem 0;
}

/* Collapsed: thin rail with hamburger only */
body.rg-toc-collapsed .rg-shell {
  grid-template-columns: var(--rg-rail-w) minmax(0, 1fr);
}

body.rg-toc-collapsed .rg-sidebar {
  padding: 12px 3px;
  align-items: center;
  overflow: hidden;
}

body.rg-toc-collapsed .rg-sidebar-header {
  flex-direction: column;
  align-items: center;
}

body.rg-toc-collapsed .rg-logo,
body.rg-toc-collapsed .rg-sidebar-body {
  display: none;
}

@media (max-width: 900px) {
  .rg-shell {
    grid-template-columns: 1fr;
  }

  .rg-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(86vw, 320px);
    z-index: 30;
    box-shadow: 8px 0 24px rgba(0, 0, 0, 0.12);
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    height: 100vh;
  }

  body.rg-toc-open .rg-sidebar {
    transform: translateX(0);
  }

  body.rg-toc-collapsed .rg-sidebar {
    display: flex;
    transform: translateX(-105%);
    width: min(86vw, 320px);
    padding: 16px 14px 40px;
    align-items: stretch;
  }

  body.rg-toc-collapsed.rg-toc-open .rg-sidebar {
    transform: translateX(0);
  }

  body.rg-toc-collapsed .rg-logo,
  body.rg-toc-collapsed.rg-toc-open .rg-logo,
  body.rg-toc-collapsed .rg-sidebar-body,
  body.rg-toc-collapsed.rg-toc-open .rg-sidebar-body {
    display: flex;
  }

  body.rg-toc-collapsed .rg-sidebar-body {
    flex-direction: column;
  }

  /* Floating burger when sidebar closed on mobile */
  body.runcible-guide::before {
    content: none;
  }

  .rg-mobile-burger {
    display: inline-flex;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 40;
  }

  body.rg-toc-open .rg-mobile-burger {
    display: none;
  }

  .rg-main {
    padding: 64px 16px 60px;
  }
}

@media (min-width: 901px) {
  .rg-mobile-burger {
    display: none !important;
  }
}

/* Search lives in sidebar */
.rg-search {
  position: relative;
  width: 100%;
  margin: 0;
  max-width: none;
  min-width: 0;
  flex: 0 0 auto;
}

.rg-search-input {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--rg-rule, #ddd4c8);
  background: #fff;
  color: var(--rg-ink, #1c1917);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  font-family: system-ui, -apple-system, sans-serif;
}

.rg-search-results {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  z-index: 40;
  background: #fffcf7;
  border: 1px solid var(--rg-rule, #ddd4c8);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  max-height: 360px;
  overflow: auto;
  padding: 6px;
}