/* Chapter table-of-contents drawer and DataTables pagination. */
/* Figma: Modal/Reply Comment frame — 447×561, 24px padding, 16px section gaps */

.chapter-reader-drawer-toc {
  --chapter-border-soft: var(--Border-Neutral-subtle, #e4e5e7);
  --chapter-brand-strong: var(--Text-Brand-default, #e85d45);
  --chapter-surface: var(--Base-bg-raised, #ffffff);
  --chapter-text: var(--Text-Neutral-primary, #070708);
  background-color: var(--chapter-surface);
  border: 1px solid var(--chapter-border-soft);
  border-radius: 24px;
  box-shadow: var(--twl-elevation-sm, 0 4px 20px rgba(0, 0, 0, 0.1));
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  max-height: 561px;
  max-width: 447px;
  min-width: 447px;
  padding: 24px;
  position: fixed;
  right: 80px;
  top: 50%;
  transform: translateY(-50%);
  width: 100%;
  z-index: 1000;
  overflow: hidden;
}

.chapter-reader-drawer-toc .toc-header {
  margin: 0;
  padding: 0 40px 0 32px;
}

.chapter-reader-drawer-toc .toc-drawer-title {
  margin: 0;
  font-family: var(--Title-Page-font-family, "DB HelvethaicaMon X", sans-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 29px;
  text-align: center;
  color: var(--chapter-text);
}

.chapter-reader-drawer-toc .chapter-reader-drawer-top {
  margin-bottom: 16px;
  min-height: 29px;
  position: relative;
}

.chapter-reader-drawer-toc .chapter-reader-drawer-close.btn-close {
  background-position: center;
  background-size: 16px;
  box-sizing: border-box;
  height: 24px;
  margin: 0 !important;
  opacity: 1;
  padding: 0 !important;
  position: absolute;
  right: 0;
  top: 2px;
  width: 24px;
  z-index: 1;
}

.chapter-reader-drawer-toc #tbChapter_wrapper {
  position: relative;
  width: 100%;
  display: flex;
  flex: 1;
  flex-direction: column;
  min-height: 0;
  transition: opacity 0.12s ease;
}

#toggleGroup .chapter-reader-drawer-toc.collapsing {
  overflow: hidden !important;
}

#toggleGroup .chapter-reader-drawer-toc.collapsing #tbChapter_wrapper {
  opacity: 0;
  pointer-events: none;
}

.chapter-reader-drawer-toc #tbChapter_wrapper .dataTables_scroll {
  margin-bottom: 0;
}

.chapter-reader-drawer-toc .toc-list {
  flex: 1;
  min-height: 0;
}

.chapter-reader-drawer-toc .toc-toolbar {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin-bottom: 16px;
  min-height: 40px;
}

.chapter-reader-drawer-toc .toc-subtitle-container,
.chapter-reader-drawer-toc .toc-pagination-container {
  flex-shrink: 0;
}

.chapter-reader-drawer-toc .toc-subtitle-container {
  white-space: nowrap;
}

.chapter-reader-drawer-toc .toc-subtitle {
  font-family: var(--Heading-font-family, "DB HelvethaicaMon X", sans-serif);
  font-size: 20px;
  font-weight: 500;
  line-height: 29px;
  margin: 0;
  color: var(--chapter-text);
}

.chapter-reader-drawer-toc .toc-footer {
  align-items: center;
  display: flex;
  justify-content: flex-end;
  margin-top: 16px;
  margin-bottom: 0;
  min-height: 40px;
  padding: 0;
  width: 100%;
  box-sizing: border-box;
}

.chapter-reader-drawer-toc #tbChapter_wrapper > .toc-footer {
  flex-shrink: 0;
}

.chapter-reader-drawer-toc .toc-pagination-bottom .dataTables_paginate {
  margin: 0;
  padding: 0;
}

.chapter-reader-drawer-toc .dataTables_scrollHead {
  display: none !important;
}

.chapter-reader-drawer-toc .dataTables_scrollBody {
  padding-top: 0 !important;
  border-top: none !important;
}

.chapter-reader-drawer-toc table#tbChapter.dataTable tbody td {
  height: 36px;
  padding: 0 !important;
  vertical-align: middle;
  line-height: 21px;
}

.chapter-reader-drawer-toc table#tbChapter.dataTable tbody tr:first-child td {
  padding-top: 0 !important;
}

.chapter-reader-drawer-toc table#tbChapter.dataTable tbody tr + tr td {
  padding-top: 4px !important;
}

.chapter-reader-drawer-toc .chapter-detail {
  align-items: center;
  border-radius: 8px;
  color: var(--chapter-text, #070708);
  min-height: 36px;
  padding: 0 8px;
}

.chapter-reader-drawer-toc .chapter-detail__number {
  color: var(--chapter-brand-strong, #e85d45);
  flex: 0 0 auto;
  font-weight: 800;
  white-space: nowrap;
}

.chapter-reader-drawer-toc .chapter-detail__title {
  color: var(--chapter-text, #070708);
  font-weight: 700;
  min-width: 0;
}

.chapter-reader-drawer-toc .chapter-detail--current {
  background-color: var(--Background-Brand-subtle, #fff3f0);
}

.chapter-reader-drawer-toc .chapter-detail--current .chapter-detail__number,
.chapter-reader-drawer-toc .chapter-detail--current .chapter-detail__title {
  font-weight: 800;
}

.chapter-list-subject {
  max-width: 340px;
}

.toc-pagination-container .dataTables_paginate,
.toc-pagination-bottom .dataTables_paginate {
  align-items: center;
  display: inline-flex;
  gap: 6px;
}

.toc-pagination-container .dataTables_paginate .paginate_button,
.toc-pagination-bottom .dataTables_paginate .paginate_button {
  align-items: center;
  background-color: var(--Base-bg-base, #ffffff) !important;
  border: 1px solid var(--Border-Neutral-default, #cacbce) !important;
  border-radius: 8px !important;
  color: var(--chapter-text, #070708) !important;
  cursor: pointer;
  display: inline-flex;
  font-family: var(--Body-font-family, "Bai Jamjuree", sans-serif) !important;
  font-size: 14px !important;
  font-weight: 700 !important;
  height: 38px;
  justify-content: center;
  padding: 0 !important;
  text-decoration: none !important;
  width: 38px;
}

.toc-pagination-container .dataTables_paginate .paginate_button:hover,
.toc-pagination-bottom .dataTables_paginate .paginate_button:hover {
  background-color: var(--Background-Neutral-secondary, #e4e5e7) !important;
}

.toc-pagination-container .dataTables_paginate .paginate_button.disabled,
.toc-pagination-bottom .dataTables_paginate .paginate_button.disabled {
  border-color: var(--Border-Neutral-subtle, #e4e5e7) !important;
  cursor: not-allowed;
  opacity: 0.5;
}

.toc-pagination-container .dataTables_paginate select,
.toc-pagination-bottom .dataTables_paginate select {
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--Base-bg-base, #ffffff) !important;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23070708' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") !important;
  background-position: right 12px center !important;
  background-repeat: no-repeat !important;
  background-size: 16px !important;
  border: 1px solid var(--Border-Neutral-default, #cacbce) !important;
  border-radius: 8px !important;
  color: var(--chapter-text, #070708) !important;
  cursor: pointer;
  font-family: var(--Body-font-family, "Bai Jamjuree", sans-serif) !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  height: 38px;
  padding: 8px 32px 8px 12px !important;
}

@media (max-width: 767px) {
  .chapter-reader-drawer-toc {
    border-radius: 16px 16px 0 0;
    bottom: 0;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    left: 0;
    max-height: 70vh;
    max-width: 100% !important;
    min-width: 0;
    overflow-y: auto;
    position: fixed;
    right: 0;
    top: auto;
    transform: none;
    width: 100% !important;
  }

}

@media (max-width: 575px) {
  .chapter-list-subject {
    max-width: 260px;
  }
}

/* ─── DataTables processing → shimmer skeleton ─── */
/* Replaces default "Processing..." overlay with animated */
/* placeholder rows matching chapter list item dimensions. */
.chapter-reader-drawer-toc #tbChapter_processing.dataTables_processing {
  /* Keep absolute positioning to overlay content (not flex flow) */
  /* Cover the scroll-list area between toolbar and footer */
  position: absolute !important;
  top: 56px !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 56px !important;
  width: auto !important;
  height: auto !important;
  margin: 0 !important;
  padding: 8px !important;
  font-size: 0 !important;
  line-height: 0 !important;
  color: transparent !important;
  background-color: var(--chapter-surface, #fff) !important;
  border: none !important;
  box-shadow: none !important;
  box-sizing: border-box !important;
  overflow: hidden !important;
  pointer-events: none !important;
  border-radius: 8px !important;
  z-index: 2 !important;

  /* Shared mask variables defining 5-row geometry (40px rhythm, 12px height) */
  --toc-mask-image:
    linear-gradient(to bottom, transparent 12px, #000 12px, #000 24px, transparent 24px),
    linear-gradient(to bottom, transparent 52px, #000 52px, #000 64px, transparent 64px),
    linear-gradient(to bottom, transparent 92px, #000 92px, #000 104px, transparent 104px),
    linear-gradient(to bottom, transparent 132px, #000 132px, #000 144px, transparent 144px),
    linear-gradient(to bottom, transparent 172px, #000 172px, #000 184px, transparent 184px),
    linear-gradient(
      to bottom,
      transparent 12px, #000 12px, #000 24px, transparent 24px,
      transparent 52px, #000 52px, #000 64px, transparent 64px,
      transparent 92px, #000 92px, #000 104px, transparent 104px,
      transparent 132px, #000 132px, #000 144px, transparent 144px,
      transparent 172px, #000 172px, #000 184px, transparent 184px,
      transparent 200px
    );
  --toc-mask-size:
    50% 200px,
    70% 200px,
    40% 200px,
    65% 200px,
    48% 200px,
    30px 200px;
  --toc-mask-position:
    54px 0,
    54px 0,
    54px 0,
    54px 0,
    54px 0,
    8px 0;
}

.chapter-reader-drawer-toc #tbChapter_processing.dataTables_processing::before,
.chapter-reader-drawer-toc #tbChapter_processing.dataTables_processing::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  -webkit-mask-image: var(--toc-mask-image);
  -webkit-mask-size: var(--toc-mask-size);
  -webkit-mask-position: var(--toc-mask-position);
  -webkit-mask-repeat: repeat-y;
  mask-image: var(--toc-mask-image);
  mask-size: var(--toc-mask-size);
  mask-position: var(--toc-mask-position);
  mask-repeat: repeat-y;
}

.chapter-reader-drawer-toc #tbChapter_processing.dataTables_processing::before {
  background-color: color-mix(in srgb, var(--chapter-text, #070708) 6%, transparent) !important;
  z-index: 1;
}

.chapter-reader-drawer-toc #tbChapter_processing.dataTables_processing::after {
  background: linear-gradient(
    90deg,
    transparent 0%,
    color-mix(in srgb, var(--chapter-text, #070708) 12%, transparent) 50%,
    transparent 100%
  ) !important;
  background-size: 200% 100% !important;
  background-position: 200% 0;
  z-index: 2;
  animation: toc-shimmer 1.5s ease-in-out infinite !important;
}

@keyframes toc-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .chapter-reader-drawer-toc #tbChapter_processing.dataTables_processing::after {
    display: none !important;
    animation: none !important;
  }
}