/* ─── Dynamic Island TOC ─────────────────────────────────── */

#toc-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: rgba(0,0,0,0.18);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s cubic-bezier(0.22,1,0.36,1);
}
#toc-backdrop.visible {
  opacity: 1;
  pointer-events: all;
}

@keyframes toc-enter {
  from { transform: translateX(-50%) translateY(24px); opacity: 0; }
  to   { transform: translateX(-50%) translateY(0);    opacity: 1; }
}

#toc-container {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  width: 280px;
  height: 52px;
  border-radius: 26px;
  background: var(--bg, #F7F7F4);
  border: 1px solid var(--border, #DDD8CF);
  box-shadow:
    0 4px 6px -1px rgba(0,0,0,0.05),
    0 10px 15px -3px rgba(0,0,0,0.07),
    0 25px 50px -12px rgba(0,0,0,0.12);
  overflow: hidden;
  cursor: pointer;
  animation: toc-enter 0.6s cubic-bezier(0.22,1,0.36,1) both;
  transition:
    width  0.5s cubic-bezier(0.22,1,0.36,1),
    height 0.5s cubic-bezier(0.22,1,0.36,1),
    border-radius 0.5s cubic-bezier(0.22,1,0.36,1);
}
#toc-container.expanded {
  width: 320px;
  height: 380px;
  border-radius: 20px;
  cursor: default;
}

/* ─── Pill ───────────────────────────────────────────────── */

#toc-pill {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 18px;
  opacity: 1;
  filter: blur(0px);
  transform: scale(1);
  transition: opacity 0.2s ease, filter 0.2s ease, transform 0.2s ease;
  transition-delay: 0.08s;
}
#toc-container.expanded #toc-pill {
  opacity: 0;
  filter: blur(4px);
  transform: scale(0.95);
  pointer-events: none;
  transition-delay: 0s;
}

.toc-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink, #0D0B09);
  flex-shrink: 0;
}

#toc-current-text {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink, #0D0B09);
  font-family: var(--font, sans-serif);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#toc-progress-svg {
  flex-shrink: 0;
  transform: rotate(-90deg);
}
.toc-track { stroke: var(--border, #DDD8CF); }
.toc-fill  {
  stroke: var(--ink, #0D0B09);
  transition: stroke-dashoffset 0.15s ease-out;
}

/* ─── Menu ───────────────────────────────────────────────── */

#toc-menu {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transform: scale(1.02);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  transition-delay: 0s;
}
#toc-container.expanded #toc-menu {
  opacity: 1;
  transform: scale(1);
  pointer-events: all;
  transition-delay: 0.15s;
}

.toc-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 10px;
  flex-shrink: 0;
}
.toc-menu-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2, #7A7570);
  font-family: var(--font, sans-serif);
}
.toc-close-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--ink-2, #7A7570);
  padding: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
}
.toc-close-btn:hover { color: var(--ink, #0D0B09); }

#toc-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  scrollbar-width: none;
}
#toc-list::-webkit-scrollbar { display: none; }

.toc-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: none;
  background: transparent;
  text-align: left;
  font-size: 13px;
  font-family: var(--font, sans-serif);
  color: rgba(13,11,9,0.38);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.toc-item:hover {
  background: rgba(13,11,9,0.05);
  color: rgba(13,11,9,0.75);
}
.toc-item.active {
  background: rgba(13,11,9,0.07);
  color: var(--ink, #0D0B09);
  font-weight: 500;
}
.toc-item-sub {
  padding-left: 22px;
  font-size: 12px;
}
.toc-item-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toc-item-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink, #0D0B09);
  flex-shrink: 0;
  margin-left: 10px;
  opacity: 0;
  transform: scale(0);
  transition: opacity 0.2s, transform 0.2s;
}
.toc-item.active .toc-item-dot {
  opacity: 1;
  transform: scale(1);
}

/* ─── Mobile ─────────────────────────────────────────────── */
@media (max-width: 600px) {
  #toc-container { width: 260px; }
  #toc-container.expanded { width: calc(100vw - 40px); height: 360px; }
}