/* ==========================================================================
   Course Details page — styles
   ========================================================================== */

/* ---------- Banner ---------- */
.course-banner {
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 2.5rem;
  background:
    radial-gradient(ellipse 60% 70% at 95% 0%, rgba(79,175,143,0.16), transparent 60%),
    var(--color-surface-alt);
}
.course-banner .breadcrumb-nav .breadcrumb { margin: 0; padding: 0; background: transparent; font-size: 0.88rem; }
.course-banner .breadcrumb-nav .breadcrumb-item + .breadcrumb-item::before { content: "\f104"; font-family: "Font Awesome 6 Free"; font-weight: 900; color: var(--color-text-muted); }
.course-banner .breadcrumb-nav a { color: var(--color-text-muted); }
.course-banner .breadcrumb-nav .active { color: var(--color-primary); font-weight: 600; max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: inline-block; vertical-align: bottom; }

.course-banner h1 { font-size: clamp(1.65rem, 3vw, 2.3rem); margin: 0.75rem 0 0.75rem; }
.course-banner .lead-desc { color: var(--color-text-muted); max-width: 720px; margin-bottom: 1.25rem; }

.course-meta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 1.4rem; font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 1.25rem; }
.course-meta-row .rating-inline { color: var(--color-text); font-weight: 700; display: flex; align-items: center; gap: 0.35rem; }
.course-meta-row .rating-inline .stars { color: var(--color-gold); }

.course-instructor-mini { display: flex; align-items: center; gap: 0.6rem; }
.course-instructor-mini img { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; }

/* ---------- Layout ---------- */
.course-detail-layout { display: grid; grid-template-columns: 1fr 380px; gap: 2.5rem; align-items: start; }
@media (max-width: 991.98px) {
  .course-detail-layout { grid-template-columns: 1fr; }
}

/* ---------- Scroll-spy section nav ---------- */
.course-section-nav {
  position: sticky;
  top: var(--header-height);
  z-index: 10;
  background: var(--color-white);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  padding: 0.4rem;
  display: flex;
  gap: 0.3rem;
  margin-bottom: 2.5rem;
  overflow-x: auto;
  scrollbar-width: none;
}
.course-section-nav::-webkit-scrollbar { display: none; }
.course-section-nav a {
  white-space: nowrap;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: background var(--dur-fast), color var(--dur-fast);
}
.course-section-nav a.active,
.course-section-nav a:hover { background: var(--color-surface-alt); color: var(--color-primary); }

.course-content-section { scroll-margin-top: calc(var(--header-height) + 70px); margin-bottom: 3.5rem; }
.course-content-section h2 { font-size: 1.4rem; margin-bottom: 1.4rem; }

/* ---------- What you'll learn ---------- */
.learn-points-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem;
  background: var(--color-surface-alt); border-radius: var(--radius-md); padding: 1.5rem;
}
.learn-points-grid li { display: flex; align-items: flex-start; gap: 0.6rem; font-size: 0.92rem; }
.learn-points-grid li i { color: var(--color-primary); margin-top: 3px; }
@media (max-width: 575.98px) { .learn-points-grid { grid-template-columns: 1fr; } }

.simple-list-block { padding: 0; margin: 0; list-style: none; }
.simple-list-block li { display: flex; align-items: flex-start; gap: 0.6rem; font-size: 0.92rem; margin-bottom: 0.7rem; color: var(--color-text-muted); }
.simple-list-block li i { color: var(--color-secondary); margin-top: 3px; }

/* ---------- Curriculum accordion ---------- */
.curriculum-summary-bar {
  display: flex; flex-wrap: wrap; gap: 1.2rem; font-size: 0.88rem; color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}
.curriculum-accordion .accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm) !important;
  margin-bottom: 0.8rem;
  overflow: hidden;
}
.curriculum-accordion .accordion-button {
  background: var(--color-white);
  font-weight: 700;
  padding: 1.1rem 1.4rem;
}
.curriculum-accordion .accordion-button:not(.collapsed) { color: var(--color-primary); box-shadow: none; background: var(--color-surface-alt); }
.curriculum-accordion .section-meta { font-size: 0.78rem; font-weight: 500; color: var(--color-text-muted); margin-inline-start: auto; margin-inline-end: 0.75rem; }
.curriculum-accordion .accordion-button::after { margin-inline-start: auto; }

.lesson-list { list-style: none; padding: 0.5rem 0; margin: 0; }
.lesson-item {
  padding: 0.75rem 1.4rem;
  font-size: 0.9rem;
  border-top: 1px solid var(--color-border);
}
.lesson-item:first-child { border-top: none; }
.lesson-row { display: flex; align-items: center; gap: 0.75rem; }
.lesson-item i.lesson-icon { color: var(--color-text-muted); width: 18px; text-align: center; }
.lesson-item .lesson-title { flex: 1; }
.lesson-item .preview-badge {
  font-size: 0.72rem; font-weight: 700; color: var(--color-primary);
  background: var(--color-surface-alt); padding: 0.2rem 0.6rem; border-radius: var(--radius-pill);
}
.lesson-item .lesson-duration { color: var(--color-text-muted); font-size: 0.82rem; min-width: 56px; text-align: left; }

.lesson-item.is-locked .lesson-title { color: var(--color-text-muted); }
.lesson-item.is-locked i.lesson-icon { color: var(--color-text-muted); }
.lesson-lock-badge {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--color-surface-alt); color: var(--color-text-muted);
  display: flex; align-items: center; justify-content: center; font-size: 0.75rem;
  cursor: help;
}
.lesson-action-btn {
  border: none; background: var(--color-surface-alt); color: var(--color-primary);
  font-size: 0.78rem; font-weight: 700; padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill); display: inline-flex; align-items: center; gap: 0.4rem;
  transition: background var(--dur-fast), color var(--dur-fast);
  white-space: nowrap;
}
.lesson-action-btn:hover { background: var(--color-primary); color: #fff; }
.lesson-action-btn[aria-expanded="true"] i { transform: rotate(180deg); }
.lesson-action-btn i { transition: transform var(--dur-fast) var(--ease-calm); }
.lesson-text-panel { padding: 0.9rem 1.4rem 0.3rem calc(18px + 1.4rem + 0.75rem); }
.lesson-text-panel p { color: var(--color-text-muted); font-size: 0.86rem; margin: 0; background: var(--color-surface-alt); border-radius: var(--radius-sm); padding: 0.9rem 1.1rem; }

/* ---------- Purchased state banner ---------- */
.owned-banner {
  display: flex; align-items: center; gap: 0.75rem;
  background: rgba(46,125,107,0.1); color: var(--color-primary);
  border: 1px solid rgba(46,125,107,0.25);
  border-radius: var(--radius-md); padding: 1rem 1.25rem; font-weight: 600; font-size: 0.9rem;
  margin-bottom: 1.5rem;
}
.owned-banner i { font-size: 1.2rem; }

.owned-badge-box {
  display: flex; align-items: center; gap: 0.6rem;
  background: rgba(46,125,107,0.1); color: var(--color-primary);
  border: 1px solid rgba(46,125,107,0.25);
  border-radius: var(--radius-sm); padding: 0.75rem 1rem; font-weight: 700; font-size: 0.85rem;
  margin-bottom: 0.9rem; text-align: center; justify-content: center;
}

/* ---------- Downloadable files ---------- */
.download-file-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.75rem; }
.download-file-item {
  display: flex; align-items: center; gap: 1rem;
  background: var(--color-white); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); padding: 0.9rem 1.2rem;
}
.download-file-item .file-icon { font-size: 1.3rem; color: var(--color-primary); width: 28px; text-align: center; }
.download-file-item .file-name { flex: 1; font-weight: 600; font-size: 0.9rem; }
.download-file-item .file-size { font-size: 0.78rem; color: var(--color-text-muted); }
.download-file-item .lock-badge { color: var(--color-text-muted); font-size: 0.85rem; }

/* ---------- Reviews ---------- */
.rating-summary-card {
  display: grid; grid-template-columns: auto 1fr; gap: 2rem;
  background: var(--color-surface-alt); border-radius: var(--radius-md); padding: 1.75rem; margin-bottom: 2rem;
}
@media (max-width: 575.98px) { .rating-summary-card { grid-template-columns: 1fr; text-align: center; } }
.rating-summary-card .avg-block { text-align: center; }
.rating-summary-card .avg-number { font-size: 2.75rem; font-weight: 800; color: var(--color-primary); line-height: 1; }
.rating-summary-card .avg-stars { color: var(--color-gold); margin: 0.4rem 0; }
.rating-summary-card .avg-count { font-size: 0.82rem; color: var(--color-text-muted); }

.rating-bar-row { display: flex; align-items: center; gap: 0.75rem; font-size: 0.82rem; margin-bottom: 0.5rem; }
.rating-bar-row .bar-track { flex: 1; height: 8px; background: var(--color-white); border-radius: 4px; overflow: hidden; }
.rating-bar-row .bar-fill { height: 100%; background: var(--color-gold); border-radius: 4px; }
.rating-bar-row .bar-label { width: 46px; color: var(--color-text-muted); }
.rating-bar-row .bar-percent { width: 38px; text-align: left; color: var(--color-text-muted); }

.review-item { padding-block: 1.5rem; border-bottom: 1px solid var(--color-border); }
.review-item:last-child { border-bottom: none; }
.review-item .review-head { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.6rem; }
.review-item .review-head img { width: 42px; height: 42px; border-radius: 50%; object-fit: cover; }
.review-item .review-stars { color: var(--color-gold); font-size: 0.8rem; }
.review-item .review-date { font-size: 0.78rem; color: var(--color-text-muted); }
.review-item .verified-badge { font-size: 0.72rem; color: var(--color-primary); font-weight: 700; }
.review-item .review-comment { font-size: 0.92rem; color: var(--color-text); margin-bottom: 0.6rem; }
.review-item .review-helpful { font-size: 0.8rem; color: var(--color-text-muted); background: none; border: none; }
.review-item .review-helpful:hover { color: var(--color-primary); }

/* ---------- Purchase box (sticky) ---------- */
.purchase-box {
  position: sticky;
  top: calc(var(--header-height) + 1.25rem);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.purchase-box .preview-thumb { position: relative; }
.purchase-box .preview-thumb img { width: 100%; height: 200px; object-fit: cover; }
.purchase-box .preview-play-btn {
  position: absolute; inset: 0; margin: auto; width: 58px; height: 58px; border-radius: 50%;
  background: rgba(255,255,255,0.92); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center; font-size: 1.15rem; box-shadow: var(--shadow-md);
}
.purchase-box .box-body { padding: 1.5rem; }
.purchase-box .price-row { display: flex; align-items: baseline; gap: 0.75rem; margin-bottom: 0.3rem; }
.purchase-box .price-row .current-price { font-size: 1.6rem; font-weight: 800; color: var(--color-primary); }
.purchase-box .price-row .old-price { font-size: 0.95rem; color: var(--color-text-muted); text-decoration: line-through; }
.purchase-box .discount-badge { display: inline-block; background: #FDECEA; color: #C0554A; font-size: 0.75rem; font-weight: 700; padding: 0.2rem 0.6rem; border-radius: var(--radius-pill); margin-bottom: 1rem; }

.purchase-box .btn-clinic-primary,
.purchase-box .btn-clinic-secondary { width: 100%; justify-content: center; margin-bottom: 0.7rem; }

.purchase-includes { list-style: none; padding: 1.25rem 0 0; margin: 1rem 0 0; border-top: 1px solid var(--color-border); }
.purchase-includes li { display: flex; align-items: center; gap: 0.6rem; font-size: 0.85rem; margin-bottom: 0.75rem; color: var(--color-text-muted); }
.purchase-includes li i { color: var(--color-primary); width: 18px; text-align: center; }

.purchase-share { display: flex; align-items: center; justify-content: space-between; margin-top: 1.25rem; padding-top: 1.1rem; border-top: 1px solid var(--color-border); }
.purchase-share .share-icons { display: flex; gap: 0.5rem; }
.purchase-share .share-icons a {
  width: 34px; height: 34px; border-radius: 50%; background: var(--color-surface-alt); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center; font-size: 0.85rem;
}

/* ---------- Mobile sticky CTA bar ---------- */
.mobile-purchase-bar {
  display: none;
  position: fixed; bottom: 0; inset-inline: 0; z-index: 1025;
  background: var(--color-white); box-shadow: 0 -6px 24px rgba(0,0,0,0.08);
  padding: 0.85rem 1.1rem;
  align-items: center; justify-content: space-between; gap: 1rem;
}
.mobile-purchase-bar .price { font-weight: 800; color: var(--color-primary); }
.mobile-purchase-bar .old-price { font-size: 0.78rem; color: var(--color-text-muted); text-decoration: line-through; display: block; }
@media (max-width: 991.98px) {
  .mobile-purchase-bar { display: flex; }
  .purchase-box { display: none; }
}

/* ---------- Instructor card (within description section) ---------- */
.instructor-card {
  display: flex; gap: 1.25rem; background: var(--color-surface-alt); border-radius: var(--radius-md); padding: 1.5rem; align-items: flex-start;
}
.instructor-card img { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.instructor-card .instructor-stats { display: flex; gap: 1.4rem; margin-top: 0.8rem; font-size: 0.82rem; color: var(--color-text-muted); }
.instructor-card .instructor-stats strong { color: var(--color-text); display: block; font-size: 0.95rem; }