/* CoreCave editorial — single lesson player page (Wave 3, T3.4).
 * Hooks: tutor/single-lesson.php + inc/corecave-bunny-helpers.php.
 * Watermark cascade — inline style is (0,1,0); we use (0,2,0) selectors.
 */

/* --- Page baseline --- */
body.single-lesson {
  background: var(--cc-ed-bg);
  color: var(--cc-ed-ink);
}

.cc-lesson-page {
  max-inline-size: var(--cc-ed-w-wide);
  margin-inline: auto;
  padding-inline: var(--cc-ed-sp-5);
  padding-block: var(--cc-ed-sp-fluid-section);
}

/* --- Grid layout — sidebar collapses to top via <details> on ≤1023px --- */
.cc-lesson-page__layout {
  display: grid;
  gap: var(--cc-ed-sp-6);
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .cc-lesson-page__layout {
    grid-template-columns: 320px 1fr;
  }
}

.cc-lesson-page__main { min-inline-size: 0; }

/* --- Lesson header --- */
.cc-lesson-page__header { margin-block-end: var(--cc-ed-sp-5); }

.cc-lesson-page__title {
  font-family: var(--cc-font-display, "Cairo Play", serif);
  font-weight: 900;
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.1;
  color: var(--cc-ed-ink);
  margin: 0;
}

/* --- Player frame — cream paper around the Bunny iframe --- */
.cc-lesson-page__player {
  margin-block-end: var(--cc-ed-sp-6);
}

.cc-lesson-page__player .cc-bunny-wrapper {
  background: var(--cc-ed-bg-tint);
  border: 8px solid var(--cc-ed-paper-rule);
  border-radius: var(--cc-ed-radius-md);
  box-shadow: var(--cc-ed-shadow-card);
  overflow: hidden;
  position: relative;
}

.cc-lesson-page__player .cc-course-preview-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  inline-size: 100%;
  background: #000;
}

.cc-lesson-page__player .cc-course-preview-frame > iframe {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  border: 0;
}

/* Re-tune watermark to editorial saffron — overrides inline <style>. */
.cc-lesson-page__player .cc-bunny-watermark {
  background: rgba(232, 73, 44, 0.4);
  color: var(--cc-ed-bg);
  font-family: var(--cc-font-body, "Almarai", sans-serif);
  font-weight: 700;
  border-radius: var(--cc-ed-radius-pill);
}

/* --- Controls row — speed pills + mark complete --- */
.cc-lesson-page__controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cc-ed-sp-4);
  align-items: center;
  justify-content: space-between;
  margin-block-end: var(--cc-ed-sp-6);
}

/* --- Speed pills --- */
.cc-speed-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cc-ed-sp-2);
}

.cc-speed-pill {
  appearance: none;
  background: var(--cc-ed-bg-tint);
  color: var(--cc-ed-ink-soft);
  border: 1px solid var(--cc-ed-paper-rule);
  border-radius: var(--cc-ed-radius-pill);
  padding: 8px 16px;
  font-family: var(--cc-font-body, "Almarai", sans-serif);
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  unicode-bidi: isolate;
  transition: background var(--cc-ed-dur-fast) var(--cc-ed-ease),
    color var(--cc-ed-dur-fast) var(--cc-ed-ease),
    transform var(--cc-ed-dur-fast) var(--cc-ed-ease);
}

.cc-speed-pill:hover { background: var(--cc-ed-paper-rule-soft); }

.cc-speed-pill:focus-visible {
  outline: none;
  box-shadow: var(--cc-ed-shadow-focus);
}

.cc-speed-pill:active { transform: scale(0.98); }

.cc-speed-pill[aria-checked="true"] {
  background: var(--cc-ed-saffron);
  color: var(--cc-ed-bg);
  border-color: var(--cc-ed-saffron);
  font-weight: 700;
}

/* --- Mark complete --- */
.cc-mark-complete { margin: 0; }

.cc-mark-complete__btn,
.cc-mark-complete .tutor-btn-primary {
  appearance: none;
  background: var(--cc-ed-saffron);
  color: var(--cc-ed-bg);
  border: 0;
  border-radius: var(--cc-ed-radius-md);
  padding: 12px 24px;
  font-family: var(--cc-font-body, "Almarai", sans-serif);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--cc-ed-dur-fast) var(--cc-ed-ease);
}

.cc-mark-complete__btn:hover,
.cc-mark-complete .tutor-btn-primary:hover {
  background: var(--cc-ed-saffron-warm);
}

.cc-mark-complete__btn:focus-visible,
.cc-mark-complete .tutor-btn-primary:focus-visible {
  outline: none;
  box-shadow: var(--cc-ed-shadow-focus);
}

/* --- Sidebar — outer <details> wraps topic <details> --- */
.cc-lesson-sidebar {
  background: var(--cc-ed-bg-tint);
  border: 1px solid var(--cc-ed-paper-rule);
  border-radius: var(--cc-ed-radius-md);
  padding: var(--cc-ed-sp-4);
  box-shadow: var(--cc-ed-shadow-paper);
}

.cc-lesson-sidebar summary,
.cc-lesson-sidebar__topic summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--cc-ed-sp-3);
}

.cc-lesson-sidebar summary::-webkit-details-marker,
.cc-lesson-sidebar__topic summary::-webkit-details-marker {
  display: none;
}

.cc-lesson-sidebar__summary {
  font-family: var(--cc-font-display, "Cairo Play", serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--cc-ed-ink);
  margin-block-end: var(--cc-ed-sp-3);
}

/* CSS-only chevron — rotates on [open]. */
.cc-lesson-sidebar__topic > summary::after {
  content: "";
  inline-size: 8px;
  block-size: 8px;
  border-inline-end: 2px solid var(--cc-ed-muted);
  border-block-end: 2px solid var(--cc-ed-muted);
  transform: rotate(-45deg);
  transition: transform var(--cc-ed-dur-mid) var(--cc-ed-ease);
  margin-inline-start: auto;
}

.cc-lesson-sidebar__topic[open] > summary::after { transform: rotate(45deg); }

.cc-lesson-sidebar__topic {
  padding-block: var(--cc-ed-sp-3);
  border-block-end: 1px solid var(--cc-ed-paper-rule-soft);
}

.cc-lesson-sidebar__topic:last-of-type { border-block-end: 0; }

.cc-lesson-sidebar__topic > summary {
  font-family: var(--cc-font-display, "Cairo Play", serif);
  font-weight: 700;
  font-size: 16px;
  color: var(--cc-ed-ink-soft);
}

/* --- Lessons list --- */
.cc-lesson-sidebar__list {
  list-style: none;
  margin: var(--cc-ed-sp-2) 0 0;
  padding: 0;
}

.cc-lesson-sidebar__item {
  border-block-start: 1px solid var(--cc-ed-paper-rule-soft);
}

.cc-lesson-sidebar__item:first-child { border-block-start: 0; }

.cc-lesson-sidebar__item a {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--cc-ed-sp-3);
  inline-size: 100%;
  padding: var(--cc-ed-sp-3) var(--cc-ed-sp-2);
  color: var(--cc-ed-ink-soft);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: color var(--cc-ed-dur-fast) var(--cc-ed-ease);
}

.cc-lesson-sidebar__item a:hover { color: var(--cc-ed-saffron); }

.cc-lesson-sidebar__title { flex: 1 1 auto; }

.cc-lesson-sidebar__item.is-current {
  border-inline-start: 3px solid var(--cc-ed-saffron);
  background: var(--cc-ed-bg);
}

.cc-lesson-sidebar__item.is-current a {
  color: var(--cc-ed-ink);
  font-weight: 700;
}

/* Replay tag — paper-pill, warning hue, small. */
.cc-lesson-sidebar__replay {
  flex: 0 0 auto;
  padding: 2px 8px;
  background: var(--cc-ed-bg);
  border: 1px solid var(--cc-ed-warning);
  border-radius: var(--cc-ed-radius-pill);
  color: var(--cc-ed-warning);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
}

/* --- Tabs — Notes / Q&A --- */
.cc-lesson-page__tabs {
  margin-block-start: var(--cc-ed-sp-6);
  padding-block: var(--cc-ed-sp-fluid-section);
  border-block-start: 1px solid var(--cc-ed-paper-rule);
}

.cc-lesson-tabs {
  display: flex;
  gap: var(--cc-ed-sp-5);
  margin-block-end: var(--cc-ed-sp-5);
  border-block-end: 1px solid var(--cc-ed-paper-rule-soft);
}

.cc-lesson-tab-btn {
  appearance: none;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: var(--cc-ed-sp-3) 0;
  font-family: var(--cc-font-display, "Cairo Play", serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--cc-ed-muted);
  transition: color var(--cc-ed-dur-fast) var(--cc-ed-ease);
}

.cc-lesson-tab-btn:hover { color: var(--cc-ed-ink-soft); }

.cc-lesson-tab-btn:focus-visible {
  outline: none;
  box-shadow: var(--cc-ed-shadow-focus);
  border-radius: var(--cc-ed-radius-sm);
}

.cc-lesson-tab-btn[aria-selected="true"] {
  color: var(--cc-ed-ink);
  text-decoration: underline solid var(--cc-ed-saffron) 3px;
  text-underline-offset: 10px;
}

.cc-lesson-tab[hidden] { display: none; }

.cc-lesson-tab {
  font-family: var(--cc-font-body, "Almarai", sans-serif);
  color: var(--cc-ed-ink-soft);
  line-height: 1.7;
}

/* --- Empty state — no Bunny video yet --- */
.cc-lesson-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-block-size: 280px;
  padding: var(--cc-ed-sp-6);
  background: var(--cc-ed-bg-tint);
  border: 1px dashed var(--cc-ed-paper-rule);
  border-radius: var(--cc-ed-radius-md);
  font-family: var(--cc-font-display, "Cairo Play", serif);
  font-weight: 700;
  font-size: clamp(20px, 2.2vw, 28px);
  color: var(--cc-ed-muted);
}

/* --- RTL chevron flip (no family swap; fonts cover both subsets) --- */
[dir="rtl"] .cc-lesson-sidebar__topic > summary::after {
  transform: rotate(135deg);
}

[dir="rtl"] .cc-lesson-sidebar__topic[open] > summary::after {
  transform: rotate(45deg);
}

/* --- Mobile ≤768px — controls stack, pills wrap to center --- */
@media (max-width: 768px) {
  .cc-lesson-page__controls {
    flex-direction: column;
    align-items: stretch;
  }

  .cc-speed-pills { justify-content: center; }

  .cc-mark-complete__btn,
  .cc-mark-complete .tutor-btn-primary {
    inline-size: 100%;
  }

  .cc-lesson-page__title { font-size: clamp(24px, 6vw, 32px); }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  .cc-speed-pill,
  .cc-mark-complete__btn,
  .cc-lesson-sidebar__item a,
  .cc-lesson-sidebar__topic > summary::after,
  .cc-lesson-tab-btn {
    transition: none;
  }
}