/* ============================================================
   KMACIMS EAT — LMS Styles (Mobile-First)
   Covers: catalogue, single course, lesson player, quiz,
           curriculum sidebar, progress indicators, all lesson types
   ============================================================ */

/* ════════════════════════════════════════════════════════════
   COURSE CATALOGUE
   ════════════════════════════════════════════════════════════ */

/* Hero */
.courses-hero {
  background: linear-gradient(135deg, var(--clr-navy) 0%, var(--clr-navy-light) 100%);
  padding-block: var(--space-16) var(--space-12);
  color: var(--clr-white);
}

.courses-hero-content { max-width: 660px; }

.courses-hero-title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-5xl));
  color: var(--clr-white);
  margin: var(--space-3) 0 var(--space-4);
}

.courses-hero-sub {
  color: rgba(255,255,255,.7);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
}

.courses-search-form {
  display: flex;
  gap: var(--space-2);
  max-width: 500px;
}

.courses-search-form input[type="search"] {
  flex: 1;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,.2);
  background: rgba(255,255,255,.1);
  color: var(--clr-white);
  font-size: var(--text-base);
}

.courses-search-form input[type="search"]::placeholder { color: rgba(255,255,255,.4); }
.courses-search-form input[type="search"]:focus {
  outline: none; border-color: var(--clr-orange); background: rgba(255,255,255,.15);
}

/* Filter bar */
.courses-filter-bar {
  background: var(--clr-white);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-3);
  position: sticky;
  top: var(--header-height);
  z-index: var(--z-sticky);
  overflow-x: auto;
}

.courses-filter-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.courses-cat-tabs { display: flex; gap: var(--space-2); flex-wrap: nowrap; }

.courses-cat-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--clr-gray-700);
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.courses-cat-tab:hover { background: var(--clr-navy-pale); color: var(--clr-navy); }
.courses-cat-tab.is-active { background: var(--clr-navy); color: var(--clr-white); border-color: var(--clr-navy); }
.tab-count { font-size: 10px; opacity: .7; }

.level-select {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  background: var(--clr-white);
  color: var(--clr-charcoal);
  cursor: pointer;
  white-space: nowrap;
}

/* Course grid */
.courses-grid-section { background: var(--clr-gray-50); }

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  align-items: start;
}

.courses-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

/* Course card */
.course-card { overflow: hidden; }

.course-card-img-wrap {
  display: block;
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
  background: var(--clr-navy);
}

.course-card-img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.course-card:hover .course-card-img { transform: scale(1.04); }

.course-card-img-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--clr-navy), var(--clr-navy-light));
}

.course-free-badge {
  position: absolute;
  top: var(--space-3); left: var(--space-3);
  background: var(--clr-green); color: var(--clr-white);
  font-size: 10px; font-weight: var(--weight-bold);
  padding: 3px 8px; border-radius: var(--radius-full);
  text-transform: uppercase; letter-spacing: .06em;
}

.course-enrolled-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: rgba(0,0,0,.55);
  padding: var(--space-2) var(--space-3);
  display: flex; align-items: center; gap: var(--space-2);
}

.course-enrolled-progress { flex: 1; height: 4px; background: rgba(255,255,255,.3); border-radius: var(--radius-full); overflow: hidden; }
.course-enrolled-bar { height: 100%; background: var(--clr-green); border-radius: inherit; transition: width 1s ease; }
.course-enrolled-pct { font-size: 11px; font-weight: var(--weight-bold); color: var(--clr-white); white-space: nowrap; }

.course-card-body { display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-4); }

.course-card-meta-top { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.course-card-title { font-size: var(--text-base); font-weight: var(--weight-semibold); color: var(--clr-navy); margin: 0; line-height: var(--leading-snug); }
.course-card-title a { color: inherit; text-decoration: none; }
.course-card-title a:hover { color: var(--clr-green); }

.course-card-excerpt { font-size: var(--text-sm); color: var(--clr-gray-500); line-height: var(--leading-snug); flex: 1; }

.course-card-stats { display: flex; gap: var(--space-4); }
.course-stat { display: flex; align-items: center; gap: 4px; font-size: var(--text-xs); color: var(--clr-gray-500); }

.course-card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: var(--space-3); border-top: 1px solid var(--color-border); margin-top: auto; }

.course-price-tag { font-size: var(--text-lg); font-weight: var(--weight-bold); color: var(--clr-navy); }
.price-free-tag { font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--clr-green-dark); background: var(--clr-green-pale); padding: 3px 10px; border-radius: var(--radius-full); }

/* ════════════════════════════════════════════════════════════
   SINGLE COURSE PAGE
   ════════════════════════════════════════════════════════════ */

/* Hero */
.course-hero {
  background: linear-gradient(135deg, var(--clr-black) 0%, #1a1a2e 100%);
  padding-block: var(--space-16) var(--space-12);
  color: var(--clr-white);
}

.course-hero-inner { max-width: 760px; }

.course-hero-badges { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-4); }

.course-hero-title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-5xl));
  color: var(--clr-white);
  margin-bottom: var(--space-4);
  line-height: 1.15;
}

.course-hero-excerpt { font-size: var(--text-lg); color: rgba(255,255,255,.7); line-height: var(--leading-relaxed); margin-bottom: var(--space-6); }

.course-hero-meta { display: flex; align-items: center; gap: var(--space-5); flex-wrap: wrap; }

.course-meta-item { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); color: rgba(255,255,255,.65); }

.course-instructor-avatar { width: 28px !important; height: 28px !important; border-radius: 50%; object-fit: cover; }

/* Two-column layout */
.course-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-10);
  align-items: start;
  padding-block: var(--space-10);
}

/* Progress banner */
.course-progress-banner {
  background: var(--clr-navy-pale);
  border: 1px solid rgba(26,43,94,.15);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-6);
}

.course-progress-header { display: flex; justify-content: space-between; font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--clr-navy); margin-bottom: var(--space-2); }

.course-main-progress-wrap { height: 8px; background: rgba(26,43,94,.12); border-radius: var(--radius-full); overflow: hidden; }
.course-main-progress-bar { height: 100%; background: linear-gradient(90deg, var(--clr-green), var(--clr-green-light)); border-radius: inherit; transition: width 1.2s cubic-bezier(.4,0,.2,1); }

.course-complete-banner { margin-top: var(--space-4); font-size: var(--text-sm); color: var(--clr-green-dark); font-weight: var(--weight-semibold); display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); }

/* Outcomes box */
.course-outcomes-box {
  background: var(--clr-green-pale);
  border: 1px solid #c6f6d5;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.course-outcomes-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); margin-top: var(--space-4); }
.course-outcomes-list li { display: flex; align-items: flex-start; gap: var(--space-2); font-size: var(--text-sm); color: var(--clr-charcoal); line-height: var(--leading-snug); }

/* Section blocks */
.course-section-block { margin-bottom: var(--space-8); }
.course-section-heading { font-size: var(--text-2xl); color: var(--clr-navy); margin-bottom: var(--space-5); padding-bottom: var(--space-3); border-bottom: 2px solid var(--clr-navy-pale); }

.course-requirements-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); }
.course-requirements-list li { display: flex; align-items: flex-start; gap: var(--space-2); font-size: var(--text-sm); color: var(--clr-gray-700); }

/* Curriculum */
.course-curriculum { margin-bottom: var(--space-8); }

.curriculum-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-5); }

.curriculum-summary { font-size: var(--text-sm); color: var(--clr-gray-500); }

.curriculum-sections { border: 1px solid var(--color-border); border-radius: var(--radius-xl); overflow: hidden; }

.curriculum-section { border-bottom: 1px solid var(--color-border); }
.curriculum-section:last-child { border-bottom: none; }

.curriculum-section-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--clr-gray-50);
  border: none;
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--clr-navy);
  text-align: left;
  transition: background var(--transition-fast);
}

.curriculum-section-toggle:hover { background: var(--clr-navy-pale); }

.section-toggle-icon { flex-shrink: 0; transition: transform var(--transition-base); }
.curriculum-section-toggle[aria-expanded="false"] .section-toggle-icon { transform: rotate(-90deg); }
.section-title-text { flex: 1; }
.section-lesson-count { font-size: var(--text-xs); color: var(--clr-gray-500); font-weight: var(--weight-normal); white-space: nowrap; }
.section-done { color: var(--clr-green); }

.curriculum-section-body { background: var(--clr-white); }

.curriculum-lesson {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--clr-gray-100);
  transition: background var(--transition-fast);
}
.curriculum-lesson:last-child { border-bottom: none; }
.curriculum-lesson:hover { background: var(--clr-gray-50); }

.curriculum-lesson--locked { opacity: .65; cursor: default; }
.curriculum-lesson--done .lesson-title-link { color: var(--clr-gray-500); }

.lesson-status-icon { flex-shrink: 0; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; margin-top: 1px; }
.lesson-circle { width: 22px; height: 22px; border-radius: 50%; border: 1.5px solid var(--color-border); display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: var(--weight-semibold); color: var(--clr-gray-500); }

.lesson-info { flex: 1; min-width: 0; }
.lesson-title-link { display: inline-flex; align-items: center; gap: var(--space-1); font-size: var(--text-sm); color: var(--clr-charcoal); text-decoration: none; line-height: var(--leading-snug); }
.lesson-title-link:hover { color: var(--clr-navy); }
.lesson-title-link--done { text-decoration: line-through; color: var(--clr-gray-400); }
.lesson-title-locked { display: inline-flex; align-items: center; gap: var(--space-1); font-size: var(--text-sm); color: var(--clr-gray-400); }
.lesson-type-icon { font-size: 14px; flex-shrink: 0; }
.lesson-preview-badge { font-size: 10px; background: var(--clr-orange-pale); color: var(--clr-orange-dark); padding: 1px 6px; border-radius: var(--radius-full); font-weight: var(--weight-semibold); }
.lesson-lock-reason { display: block; font-size: 11px; color: var(--clr-gray-400); margin-top: 2px; }
.lesson-meta { display: flex; align-items: center; gap: var(--space-2); flex-shrink: 0; }
.lesson-type-label { font-size: 11px; color: var(--clr-gray-400); }
.lesson-duration { font-size: 11px; color: var(--clr-gray-400); }

/* Instructor */
.course-instructor-card { display: flex; gap: var(--space-5); align-items: flex-start; background: var(--clr-gray-50); border-radius: var(--radius-xl); padding: var(--space-6); border: 1px solid var(--color-border); }
.instructor-avatar { width: 80px !important; height: 80px !important; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.instructor-name { font-size: var(--text-xl); color: var(--clr-navy); margin-bottom: var(--space-1); }
.instructor-title { font-size: var(--text-sm); color: var(--clr-gray-500); margin-bottom: var(--space-3); }
.instructor-bio { font-size: var(--text-sm); color: var(--clr-gray-600); line-height: var(--leading-relaxed); }

/* Enrol sidebar card */
.course-sidebar-col { position: sticky; top: calc(var(--header-height) + var(--space-4)); }

.course-enrol-card { background: var(--clr-white); border: 1px solid var(--color-border); border-radius: var(--radius-2xl); overflow: hidden; box-shadow: var(--shadow-xl); }

.enrol-card-thumb img { width: 100%; height: auto; display: block; aspect-ratio: 16/9; object-fit: cover; }

.enrol-card-price { padding: var(--space-5) var(--space-6) 0; }
.enrol-price { font-family: var(--font-heading); font-size: var(--text-4xl); font-weight: var(--weight-black); color: var(--clr-navy); line-height: 1; }
.enrol-price-free { font-size: var(--text-2xl); font-weight: var(--weight-black); color: var(--clr-green); }

.enrol-card-progress { padding: var(--space-4) var(--space-6); }
.enrol-progress-label { display: flex; justify-content: space-between; font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--clr-navy); margin-bottom: var(--space-2); }
.enrol-progress-bar-wrap { height: 8px; background: var(--clr-gray-100); border-radius: var(--radius-full); overflow: hidden; }
.enrol-progress-bar { height: 100%; background: linear-gradient(90deg, var(--clr-green), var(--clr-green-light)); border-radius: inherit; transition: width 1.2s ease; }

.enrol-main-btn { display: flex; align-items: center; justify-content: center; gap: var(--space-2); margin: var(--space-5) var(--space-6) var(--space-3); }
.enrol-cert-btn { display: flex; align-items: center; justify-content: center; gap: var(--space-2); margin: 0 var(--space-6) var(--space-4); }

.enrol-guarantee { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-xs); color: var(--clr-green-dark); padding: 0 var(--space-6) var(--space-4); }

.enrol-card-details { list-style: none; border-top: 1px solid var(--color-border); padding: var(--space-4) var(--space-6); display: flex; flex-direction: column; gap: var(--space-3); }
.enrol-card-details li { display: flex; align-items: center; gap: var(--space-3); font-size: var(--text-sm); color: var(--clr-charcoal); }

.enrol-card-share { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-4) var(--space-6); border-top: 1px solid var(--color-border); font-size: var(--text-sm); color: var(--clr-gray-500); flex-wrap: wrap; }

/* ════════════════════════════════════════════════════════════
   LESSON PLAYER — full-screen layout
   ════════════════════════════════════════════════════════════ */

.lesson-player-page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--clr-gray-50);
}

/* Top bar */
.lesson-topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-fixed);
  background: var(--clr-navy);
  color: var(--clr-white);
  height: 56px;
  flex-shrink: 0;
}

.lesson-topbar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 100%;
  padding-inline: var(--space-4);
  max-width: 100%;
}

.lesson-back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,.75);
  text-decoration: none;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.lesson-back-btn:hover { background: rgba(255,255,255,.1); color: var(--clr-white); }

.lesson-topbar-course { display: flex; align-items: center; gap: var(--space-2); flex: 1; min-width: 0; }
.lesson-topbar-label { font-size: var(--text-xs); color: rgba(255,255,255,.5); white-space: nowrap; display: none; }
.lesson-topbar-course-title { font-size: var(--text-sm); font-weight: var(--weight-semibold); color: rgba(255,255,255,.85); text-decoration: none; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-topbar-course-title:hover { color: var(--clr-white); }

.lesson-topbar-progress { display: flex; align-items: center; gap: var(--space-2); flex-shrink: 0; }
.lesson-topbar-progress-bar { width: 120px; height: 4px; background: rgba(255,255,255,.2); border-radius: var(--radius-full); overflow: hidden; }
.lesson-topbar-progress-fill { height: 100%; background: var(--clr-green); border-radius: inherit; transition: width 1s ease; }
.lesson-topbar-progress-pct { font-size: var(--text-xs); color: rgba(255,255,255,.7); white-space: nowrap; }

.lesson-curriculum-toggle-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-md);
  background: transparent;
  color: rgba(255,255,255,.85);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}
.lesson-curriculum-toggle-btn:hover { background: rgba(255,255,255,.1); color: var(--clr-white); }

/* Main layout */
.lesson-layout {
  display: flex;
  flex: 1;
  position: relative;
}

/* ── Sidebar ── */
.lesson-sidebar {
  width: 320px;
  flex-shrink: 0;
  background: var(--clr-white);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  height: calc(100vh - 56px);
  position: sticky;
  top: 56px;
  transition: transform var(--transition-slow);
}

.lesson-sidebar-inner { padding-bottom: var(--space-8); }

.lesson-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--clr-white);
  z-index: 1;
}

.lesson-sidebar-title { font-size: var(--text-base); font-weight: var(--weight-bold); color: var(--clr-navy); }

.lesson-sidebar-close { display: none; width: 32px; height: 32px; border: none; background: var(--clr-gray-100); border-radius: var(--radius-md); cursor: pointer; align-items: center; justify-content: center; color: var(--clr-charcoal); }

/* Sidebar sections */
.sidebar-section { border-bottom: 1px solid var(--color-border); }
.sidebar-section:last-child { border-bottom: none; }

.sidebar-section-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--clr-gray-50);
  border: none;
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--clr-navy);
  text-transform: uppercase;
  letter-spacing: .06em;
  text-align: left;
  transition: background var(--transition-fast);
}
.sidebar-section-toggle:hover { background: var(--clr-navy-pale); }

.sidebar-lesson {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--clr-gray-100);
  transition: background var(--transition-fast);
}
.sidebar-lesson:last-child { border-bottom: none; }
.sidebar-lesson:hover { background: var(--clr-gray-50); }
.sidebar-lesson--active { background: var(--clr-navy-pale) !important; border-left: 3px solid var(--clr-navy); }
.sidebar-lesson--locked { opacity: .6; }
.sidebar-lesson--done .sidebar-lesson-link { color: var(--clr-gray-400); }

.sidebar-lesson-status { flex-shrink: 0; width: 22px; height: 22px; display: flex; align-items: center; justify-content: center; margin-top: 2px; }
.sidebar-lesson-num { width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid var(--color-border); display: flex; align-items: center; justify-content: center; font-size: 10px; color: var(--clr-gray-500); }

.sidebar-lesson-info { flex: 1; min-width: 0; }
.sidebar-lesson-icon { font-size: 13px; margin-right: 4px; }
.sidebar-lesson-link { display: block; font-size: var(--text-xs); color: var(--clr-charcoal); text-decoration: none; line-height: var(--leading-snug); }
.sidebar-lesson-link:hover { color: var(--clr-navy); }
.sidebar-lesson-locked-title { display: block; font-size: var(--text-xs); color: var(--clr-gray-400); line-height: var(--leading-snug); }
.sidebar-lesson-dur { display: block; font-size: 10px; color: var(--clr-gray-400); margin-top: 2px; }

/* Overlay (mobile) */
.lesson-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: calc(var(--z-modal) - 1);
}

/* ── Content area ── */
.lesson-content-area {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.lesson-content-header {
  padding: var(--space-6) var(--space-8) var(--space-4);
  background: var(--clr-white);
  border-bottom: 1px solid var(--color-border);
}

.lesson-content-breadcrumb { font-size: var(--text-xs); color: var(--clr-gray-500); margin-bottom: var(--space-2); }
.lesson-content-breadcrumb a { color: var(--clr-navy); text-decoration: none; }
.lesson-content-breadcrumb a:hover { text-decoration: underline; }

.lesson-title { font-size: clamp(var(--text-xl), 3vw, var(--text-3xl)); color: var(--clr-navy); margin-bottom: var(--space-3); }

.lesson-meta-bar { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }

.lesson-type-chip, .lesson-duration-chip, .lesson-completed-chip {
  display: inline-flex; align-items: center; gap: var(--space-1);
  font-size: var(--text-xs); font-weight: var(--weight-medium);
  padding: 3px 8px; border-radius: var(--radius-full);
}

.lesson-type-chip { background: var(--clr-navy-pale); color: var(--clr-navy); }
.lesson-duration-chip { background: var(--clr-gray-100); color: var(--clr-gray-600); }
.lesson-completed-chip { background: var(--clr-green-pale); color: var(--clr-green-dark); }

/* Lesson body */
.lesson-body { flex: 1; }

/* Video */
.lesson-video-wrap { background: #000; }
.lesson-video-embed { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; }
.lesson-video-embed iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }
.lesson-direct-video { width: 100%; max-height: 70vh; display: block; }
.lesson-no-video { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: var(--space-16); background: var(--clr-gray-100); gap: var(--space-3); color: var(--clr-gray-500); }

/* Audio */
.lesson-audio-wrap { padding: var(--space-8); background: var(--clr-white); }
.audio-cover-img { width: 100%; max-height: 320px; object-fit: cover; border-radius: var(--radius-xl); margin-bottom: var(--space-6); }
.lesson-audio-player { width: 100%; accent-color: var(--clr-navy); }

/* SCORM */
.lesson-scorm-wrap { background: var(--clr-white); }
.lesson-scorm-header { display: flex; align-items: center; justify-content: space-between; padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--color-border); }
.lesson-scorm-iframe { width: 100%; height: 65vh; border: none; display: block; }
.lesson-scorm-note { font-size: var(--text-xs); color: var(--clr-gray-500); padding: var(--space-3) var(--space-5); }

/* H5P */
.lesson-h5p-wrap { background: var(--clr-white); }
.lesson-h5p-header { padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--color-border); }
.lesson-h5p-iframe { width: 100%; min-height: 60vh; border: none; display: block; }

/* Download */
.lesson-download-wrap { padding: var(--space-8); background: var(--clr-white); }
.lesson-download-preview img { width: 100%; border-radius: var(--radius-xl); margin-bottom: var(--space-6); }
.lesson-download-cta { text-align: center; padding: var(--space-12); }
.download-icon { width: 96px; height: 96px; background: var(--clr-navy-pale); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto var(--space-5); }
.lesson-download-cta h3 { font-size: var(--text-2xl); color: var(--clr-navy); margin-bottom: var(--space-5); }
.download-note { font-size: var(--text-sm); color: var(--clr-gray-500); margin-top: var(--space-4); }

/* Live */
.lesson-live-wrap { padding: var(--space-8); background: var(--clr-white); }
.lesson-live-card { max-width: 480px; margin-inline: auto; text-align: center; background: var(--clr-gray-50); border: 1px solid var(--color-border); border-radius: var(--radius-2xl); padding: var(--space-10); }
.live-status-indicator { display: flex; align-items: center; justify-content: center; gap: var(--space-2); margin-bottom: var(--space-5); }
.live-dot { width: 10px; height: 10px; border-radius: 50%; }
.live-dot--live { background: #e53e3e; box-shadow: 0 0 0 3px rgba(229,62,62,.25); animation: pulse-dot 1.5s infinite; }
.live-dot--upcoming { background: var(--clr-orange); }
.live-dot--ended { background: var(--clr-gray-300); }
.live-label { font-size: var(--text-xs); font-weight: var(--weight-bold); letter-spacing: .1em; text-transform: uppercase; color: var(--clr-navy); }
.live-date { display: flex; align-items: center; justify-content: center; gap: var(--space-2); font-size: var(--text-sm); color: var(--clr-gray-600); margin-bottom: var(--space-6); }

/* Text content */
.lesson-text-content { padding: var(--space-8); background: var(--clr-white); font-size: var(--text-lg); line-height: var(--leading-relaxed); }

/* No content */
.lesson-no-content { padding: var(--space-12); text-align: center; color: var(--clr-gray-500); }

/* ── QUIZ ── */
.lesson-quiz-wrap { padding: var(--space-8); background: var(--clr-white); }

.quiz-attempts-summary { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; background: var(--clr-navy-pale); border-radius: var(--radius-lg); padding: var(--space-3) var(--space-5); margin-bottom: var(--space-6); font-size: var(--text-sm); }
.quiz-retry-link { margin-left: auto; color: var(--clr-navy); font-weight: var(--weight-semibold); }

.quiz-header { margin-bottom: var(--space-8); }
.quiz-title { font-size: var(--text-2xl); color: var(--clr-navy); }
.quiz-meta { font-size: var(--text-sm); color: var(--clr-gray-500); margin-top: var(--space-2); }

.quiz-question { margin-bottom: var(--space-8); }
.quiz-question-text { font-size: var(--text-base); font-weight: var(--weight-semibold); color: var(--clr-navy); margin-bottom: var(--space-4); display: flex; gap: var(--space-2); }
.quiz-q-num { color: var(--clr-orange); font-weight: var(--weight-black); flex-shrink: 0; }

.quiz-options { display: flex; flex-direction: column; gap: var(--space-2); }

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
}

.quiz-option:hover { border-color: var(--clr-navy); background: var(--clr-navy-pale); }
.quiz-option input[type="radio"] { accent-color: var(--clr-navy); width: 16px; height: 16px; flex-shrink: 0; }
.quiz-option:has(input:checked) { border-color: var(--clr-navy); background: var(--clr-navy-pale); }

.quiz-tf { flex-direction: row; }
.quiz-tf-option { flex: 1; justify-content: center; }

.quiz-short-answer input { width: 100%; padding: var(--space-3) var(--space-4); border: 2px solid var(--color-border); border-radius: var(--radius-lg); font-size: var(--text-base); transition: border-color var(--transition-fast); }
.quiz-short-answer input:focus { outline: none; border-color: var(--clr-navy); }

.quiz-submit-row { margin-top: var(--space-8); }
.quiz-submit-btn { min-width: 200px; }

/* Quiz results */
.quiz-results { margin-top: var(--space-8); }
.quiz-result-score { text-align: center; padding: var(--space-8); border-radius: var(--radius-2xl); margin-bottom: var(--space-6); }
.quiz-result-score--pass { background: var(--clr-green-pale); border: 1px solid #c6f6d5; }
.quiz-result-score--fail { background: #fff5f5; border: 1px solid #fed7d7; }
.quiz-score-number { font-size: clamp(3rem,8vw,5rem); font-weight: var(--weight-black); line-height: 1; }
.quiz-score-number--pass { color: var(--clr-green); }
.quiz-score-number--fail { color: #c53030; }
.quiz-score-label { font-size: var(--text-lg); font-weight: var(--weight-semibold); margin-top: var(--space-2); }
.quiz-score-msg { font-size: var(--text-sm); color: var(--clr-gray-500); margin-top: var(--space-2); }

.quiz-answer-review { border: 1px solid var(--color-border); border-radius: var(--radius-xl); overflow: hidden; }
.quiz-answer-item { display: flex; gap: var(--space-3); padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--color-border); }
.quiz-answer-item:last-child { border-bottom: none; }
.quiz-answer-item--correct { background: #f0fdf4; }
.quiz-answer-item--wrong  { background: #fff5f5; }
.quiz-answer-icon { flex-shrink: 0; margin-top: 2px; }
.quiz-answer-detail { flex: 1; }
.quiz-answer-question { font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--clr-navy); margin-bottom: 4px; }
.quiz-answer-your { font-size: var(--text-xs); color: var(--clr-gray-600); }
.quiz-answer-correct { font-size: var(--text-xs); color: var(--clr-green-dark); }
.quiz-answer-explanation { font-size: var(--text-xs); color: var(--clr-gray-500); margin-top: 4px; font-style: italic; }

/* ── Assignment ── */
.lesson-assignment-wrap { padding: var(--space-8); background: var(--clr-white); }
.assignment-instructions { background: var(--clr-gray-50); border-radius: var(--radius-xl); padding: var(--space-6); margin-bottom: var(--space-6); }
.assignment-instructions h3 { color: var(--clr-navy); margin-bottom: var(--space-3); }
.assignment-due { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); color: var(--clr-orange-dark); font-weight: var(--weight-semibold); margin-bottom: var(--space-5); }
.assignment-submitted { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-4); background: var(--clr-green-pale); border-radius: var(--radius-lg); font-weight: var(--weight-semibold); color: var(--clr-green-dark); }
.assignment-sub-date { font-weight: var(--weight-normal); color: var(--clr-gray-500); font-size: var(--text-sm); }
.assignment-status { margin-top: var(--space-3); font-size: var(--text-sm); }

/* ── Locked state ── */
.lesson-locked-state { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: var(--space-20) var(--space-8); gap: var(--space-4); flex: 1; background: var(--clr-white); }
.lesson-locked-icon { width: 96px; height: 96px; background: var(--clr-gray-100); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.lesson-locked-title { font-size: clamp(var(--text-xl),3vw,var(--text-3xl)); color: var(--clr-navy); }
.lesson-locked-msg { font-size: var(--text-lg); color: var(--clr-gray-600); max-width: 480px; line-height: var(--leading-relaxed); }
.lesson-locked-sub { font-size: var(--text-sm); color: var(--clr-gray-400); }

/* ── Lesson footer ── */
.lesson-footer {
  padding: var(--space-5) var(--space-8);
  background: var(--clr-white);
  border-top: 1px solid var(--color-border);
  position: sticky;
  bottom: 0;
  z-index: var(--z-raised);
}

.lesson-nav-btns {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.lesson-nav-prev, .lesson-nav-next {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  transition: all var(--transition-fast);
  max-width: 200px;
}

.nav-btn-label { display: flex; flex-direction: column; }
.nav-btn-sublabel { font-size: 10px; text-transform: uppercase; letter-spacing: .08em; opacity: .7; }
.nav-btn-title { font-size: var(--text-sm); font-weight: var(--weight-semibold); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.lesson-complete-btn { display: flex; align-items: center; gap: var(--space-2); }

.lesson-completed-stamp { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); font-weight: var(--weight-semibold); color: var(--clr-green-dark); background: var(--clr-green-pale); padding: var(--space-2) var(--space-4); border-radius: var(--radius-full); }

/* ════════════════════════════════════════════════════════════
   RESPONSIVE (mobile-first — all above is base mobile styles)
   ════════════════════════════════════════════════════════════ */

/* Tablet 640px+ */
@media (min-width: 640px) {
  .lesson-sidebar-close { display: flex; }
  .lesson-topbar-label  { display: block; }
  .lesson-topbar-progress-bar { width: 160px; }
  .course-outcomes-list { grid-template-columns: 1fr 1fr; }
}

/* Desktop 1024px+ */
@media (min-width: 1024px) {
  .courses-grid { grid-template-columns: repeat(3, 1fr); }
  .course-layout { grid-template-columns: 1fr 360px; }
  .lesson-sidebar { display: block !important; transform: none !important; }
  .lesson-sidebar-close { display: none; }
  .lesson-curriculum-toggle-btn { display: none; }
  .lesson-sidebar-overlay { display: none !important; }
  .lesson-content-header { padding: var(--space-8) var(--space-10) var(--space-5); }
}

/* Mobile: sidebar slides in as drawer */
@media (max-width: 1023px) {
  .lesson-sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: var(--z-modal);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    height: 100vh;
    width: min(320px, 85vw);
  }

  .lesson-sidebar.is-open {
    transform: translateX(0);
  }

  .lesson-sidebar-overlay.is-active { display: block; }
  .lesson-sidebar-close { display: flex; }
  .lesson-layout { flex-direction: column; }
  .lesson-content-header { padding: var(--space-5); }
  .lesson-footer { padding: var(--space-4); }
  .lesson-text-content, .lesson-quiz-wrap, .lesson-assignment-wrap, .lesson-download-wrap, .lesson-audio-wrap, .lesson-live-wrap { padding: var(--space-5); }
  .nav-btn-title { display: none; }
  .nav-btn-sublabel { font-size: var(--text-xs); opacity: 1; }
}

@media (max-width: 767px) {
  .courses-grid { grid-template-columns: 1fr; }
  .course-layout { grid-template-columns: 1fr; }
  .course-sidebar-col { position: static; }
  .course-outcomes-list { grid-template-columns: 1fr; }
  .instructor-avatar { width: 56px !important; height: 56px !important; }
}

@media (max-width: 480px) {
  .lesson-topbar-progress { display: none; }
  .courses-filter-inner { gap: var(--space-2); }
  .lesson-nav-btns { flex-direction: column; align-items: stretch; }
  .lesson-nav-prev, .lesson-nav-next { max-width: 100%; justify-content: center; }
}