/* Mobile TOC floating button & panel - only visible ≤991px */
@media (min-width: 992px) {
  #mobile-toc-btn, #mobile-toc-panel { display: none !important; }
}

#mobile-toc-btn {
  position: fixed;
  z-index: 9999;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #2f4154;
  color: #fff;
  border: none;
  font-size: 20px;
  line-height: 44px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
  cursor: pointer;
  touch-action: none;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

#mobile-toc-panel {
  position: fixed;
  z-index: 9998;
  width: 280px;
  max-height: 70vh;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
  display: none;
  flex-direction: column;
  overflow: hidden;
}
#mobile-toc-panel.show { display: flex; }

#mobile-toc-panel .panel-nav {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  border-top: 1px solid #eee;
  font-size: 13px;
  flex-shrink: 0;
}
#mobile-toc-panel .panel-nav a {
  color: #2f4154;
  text-decoration: none;
}

#mobile-toc-panel .panel-toc {
  overflow-y: auto;
  padding: 8px 12px;
  -webkit-overflow-scrolling: touch;
}

/* Override theme's line-clamp truncation for panel TOC items */
#mobile-toc-panel .toc-list-item {
  -webkit-line-clamp: unset;
  text-overflow: unset;
  overflow: visible;
  white-space: normal;
  display: block;
  padding-left: 0 !important;
}
#mobile-toc-panel .toc-list-item::before {
  display: none !important;
}
#mobile-toc-panel .toc-toggle {
  display: none !important;
}
#mobile-toc-panel ol,
#mobile-toc-panel ul {
  padding-left: 0 !important;
  list-style: none !important;
}
#mobile-toc-panel .tocbot-link {
  white-space: normal;
  word-break: break-word;
}

/* Highlight active link */
#mobile-toc-panel .tocbot-active-link {
  color: #1589e9;
  font-weight: bold;
}

/* Dark mode */
html[data-user-color-scheme="dark"] #mobile-toc-btn {
  background: #1f3144;
}
html[data-user-color-scheme="dark"] #mobile-toc-panel {
  background: #252d38;
  box-shadow: 0 4px 16px rgba(0,0,0,.5);
}
html[data-user-color-scheme="dark"] #mobile-toc-panel .panel-nav {
  border-bottom-color: #435266;
}
html[data-user-color-scheme="dark"] #mobile-toc-panel .panel-nav a {
  color: #d0d0d0;
}