/* Courses Experience Styles */

.courses-hero {
  position: relative;
  padding: 6rem 0 4rem;
  background: radial-gradient(circle at 15% 20%, rgba(52, 152, 219, 0.25), transparent 40%),
    radial-gradient(circle at 85% 15%, rgba(231, 76, 60, 0.2), transparent 45%),
    linear-gradient(135deg, #1f2a44 0%, #162036 40%, #101723 100%);
  color: #ecf0f1;
  overflow: hidden;
}

.courses-hero .hero-overlay {
  background: linear-gradient(90deg, rgba(22, 32, 54, 0.6) 0%, rgba(22, 32, 54, 0.1) 100%);
}

.hero-title {
  font-size: clamp(2.4rem, 3vw + 1rem, 3.6rem);
  line-height: 1.15;
  color: #ffffff;
}

.hero-subtitle {
  max-width: 32rem;
  color: rgba(236, 240, 241, 0.85);
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, #39a6ff 0%, #1f8bec 100%);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(57, 166, 255, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(57, 166, 255, 0.45);
  color: #ffffff;
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #ecf0f1;
  text-decoration: none;
  backdrop-filter: blur(6px);
  transition: all 0.25s ease;
}

.btn-hero-secondary:hover {
  border-color: #ffffff;
  color: #ffffff;
  transform: translateY(-1px);
}

.hero-highlight-card {
  background: rgba(16, 25, 39, 0.85);
  border-radius: 20px;
  padding: 2rem;
  display: grid;
  gap: 1.5rem;
  backdrop-filter: blur(20px);
  border: 1px solid rgba(236, 240, 241, 0.12);
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.35);
}

.highlight-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(57, 166, 255, 0.2), rgba(57, 166, 255, 0));
  display: grid;
  place-items: center;
  font-size: 2rem;
  color: #39a6ff;
}

.highlight-eyebrow {
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: rgba(236, 240, 241, 0.55);
}

.highlight-title {
  font-size: 1.65rem;
  font-weight: 600;
  color: #ffffff;
}

.highlight-meta {
  color: rgba(236, 240, 241, 0.7);
  font-size: 0.95rem;
}

.courses-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-wrapper {
  position: relative;
}

.search-wrapper i {
  position: absolute;
  top: 50%;
  left: 0.95rem;
  transform: translateY(-50%);
  color: #7f8c8d;
}

.search-wrapper .form-control {
  padding-left: 2.75rem;
  border-radius: 12px;
  min-width: 240px;
  border: 1px solid rgba(44, 62, 80, 0.12);
  box-shadow: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-wrapper .form-control:focus {
  border-color: rgba(57, 166, 255, 0.7);
  box-shadow: 0 8px 18px rgba(57, 166, 255, 0.2);
}

.filter-pill-group {
  display: inline-flex;
  gap: 0.5rem;
  background: rgba(52, 73, 94, 0.08);
  padding: 0.35rem;
  border-radius: 999px;
}

.filter-pill {
  border: none;
  padding: 0.45rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
  background: transparent;
  color: #2c3e50;
  transition: all 0.2s ease;
}

.filter-pill.active {
  background: #2c3e50;
  color: #ecf0f1;
  box-shadow: 0 8px 18px rgba(44, 62, 80, 0.3);
}

.stat-card {
  min-width: 150px;
  padding: 0.85rem 1.2rem;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid rgba(52, 73, 94, 0.08);
  box-shadow: 0 14px 25px rgba(15, 23, 42, 0.08);
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #7f8c8d;
  margin-bottom: 0.25rem;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: #1f2a44;
}

.course-card-wrapper.d-none {
  opacity: 0;
  pointer-events: none;
}

.course-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.8rem;
  border-radius: 22px;
  position: relative;
  background: linear-gradient(135deg, #1c2337 0%, #202f4a 65%, #243556 100%);
  color: #ecf0f1;
  overflow: hidden;
  isolation: isolate;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 25px 45px rgba(15, 23, 42, 0.35);
}

.course-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% 20%, rgba(57, 166, 255, 0.25), transparent 55%),
    radial-gradient(circle at 90% 10%, rgba(231, 76, 60, 0.18), transparent 60%);
  opacity: 0.9;
  z-index: -2;
}

.course-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16, 24, 40, 0.1) 0%, rgba(16, 24, 40, 0.75) 100%);
  opacity: 0;
  z-index: -1;
  transition: opacity 0.25s ease;
}

.course-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 28px 40px rgba(15, 23, 42, 0.45);
}

.course-card:hover::after {
  opacity: 1;
}

.course-card__header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.course-badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.badge-tier {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}

.bg-success-soft {
  background: rgba(46, 204, 113, 0.15);
  color: #2ecc71;
}

.bg-warning-soft {
  background: rgba(241, 196, 15, 0.18);
  color: #f1c40f;
}

.bg-dark-glass {
  background: rgba(13, 27, 42, 0.65);
  color: #ecf0f1;
}

.course-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0;
}

.course-card__instructor {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: rgba(236, 240, 241, 0.75);
  margin: 0;
  font-size: 0.95rem;
}

.course-card__body {
  padding: 1.25rem 0;
  display: grid;
  gap: 1rem;
}

.course-card__locked {
  padding: 1rem 1.25rem;
  border-radius: 16px;
  background: rgba(13, 27, 42, 0.35);
  border: 1px dashed rgba(236, 240, 241, 0.4);
  color: rgba(236, 240, 241, 0.9);
  font-size: 0.95rem;
}

.course-card__description {
  margin: 0;
  color: rgba(236, 240, 241, 0.85);
  font-size: 0.96rem;
  line-height: 1.6;
}

.course-metadata {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.course-metadata li {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: rgba(236, 240, 241, 0.75);
  font-size: 0.9rem;
}

.course-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.cta-group {
  display: inline-flex;
  gap: 0.75rem;
}

.course-card .btn {
  border-radius: 999px;
  padding-inline: 1.25rem;
  font-weight: 600;
}

.course-card .btn-outline-light {
  color: #ffffff;
  border-color: rgba(236, 240, 241, 0.55);
}

.course-card .btn-outline-light:hover {
  border-color: #ffffff;
  color: #0d1726;
  background: #ffffff;
}

.course-price {
  font-weight: 700;
  font-size: 1rem;
}

.course-price.text-success {
  color: #2ecc71 !important;
}

.empty-state {
  background: #ffffff;
  border-radius: 24px;
  padding: 4rem 2rem;
  text-align: center;
  border: 1px dashed rgba(52, 73, 94, 0.2);
  box-shadow: 0 25px 45px rgba(15, 23, 42, 0.08);
}

.empty-illustration {
  width: 88px;
  height: 88px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(57, 166, 255, 0.15), rgba(57, 166, 255, 0));
  color: #1f8bec;
  font-size: 2rem;
}

@media (max-width: 991px) {
  .courses-hero {
    padding-top: 5rem;
  }

  .courses-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-left,
  .toolbar-right {
    justify-content: space-between;
  }
}

@media (max-width: 768px) {
  .highlight-title {
    font-size: 1.4rem;
  }

  .hero-highlight-card {
    padding: 1.5rem;
  }

  .filter-pill-group {
    width: 100%;
    justify-content: space-between;
  }

  .course-card {
    padding: 1.6rem;
  }
}

@media (max-width: 576px) {
  .btn-hero-primary,
  .btn-hero-secondary {
    width: 100%;
    justify-content: center;
  }

  .toolbar-right {
    width: 100%;
    justify-content: space-between;
  }

  .stat-card {
    flex: 1 1 45%;
  }

  .course-card__footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-group {
    width: 100%;
  }

  .cta-group .btn {
    flex: 1;
    text-align: center;
  }
}

/* Course detail */

.course-detail-hero {
  background: linear-gradient(135deg, #0d1726 0%, #192941 60%, #1d2f4a 100%);
  color: #ecf0f1;
  position: relative;
  padding: 6rem 0 4rem;
}

.course-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  color: rgba(236, 240, 241, 0.75);
}

.course-hero-stats {
  background: rgba(13, 23, 38, 0.75);
  border-radius: 20px;
  padding: 1.5rem;
  display: grid;
  gap: 1.2rem;
  border: 1px solid rgba(236, 240, 241, 0.15);
  box-shadow: 0 20px 45px rgba(13, 23, 38, 0.4);
  backdrop-filter: blur(14px);
}

.course-hero-stat .label {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.7rem;
  color: rgba(236, 240, 241, 0.55);
  margin-bottom: 0.35rem;
}

.course-hero-stat .value {
  font-size: 1.9rem;
  font-weight: 700;
  color: #ffffff;
}

.course-detail-body {
  background: linear-gradient(180deg, #f5f7fb 0%, #ffffff 100%);
}

.card-glass {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 24px;
  padding: 2rem;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 24px 45px rgba(15, 23, 42, 0.1);
  position: relative;
  overflow: hidden;
  z-index: 0;
}

.card-glass::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% -10%, rgba(57, 166, 255, 0.1), transparent 40%),
    radial-gradient(circle at 95% 20%, rgba(46, 204, 113, 0.08), transparent 50%);
  pointer-events: none;
  opacity: 0.8;
  z-index: -1;
}

.course-tabs .nav-pills .nav-link {
  border-radius: 999px;
  padding: 0.65rem 1.4rem;
  font-weight: 600;
  color: #1f2a44;
  transition: all 0.2s ease;
}

.course-tabs .nav-pills .nav-link.active {
  background: #1f2a44;
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(31, 42, 68, 0.25);
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: #1f2a44;
}

.course-overview .rich-text p {
  color: #495567;
  line-height: 1.8;
}

.course-highlights {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.highlight-card {
  background: rgba(15, 23, 42, 0.03);
  border-radius: 18px;
  padding: 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  border: 1px solid rgba(31, 42, 68, 0.08);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.highlight-card i {
  font-size: 1.6rem;
  color: #1f8bec;
}

.highlight-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.highlight-card p {
  margin: 0;
  color: #5e6c80;
  font-size: 0.92rem;
}

.highlight-card:hover {
  transform: translateY(-4px);
  border-color: rgba(31, 139, 236, 0.3);
}

.course-curriculum .accordion-item {
  border: none;
  margin-bottom: 1rem;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.08);
}

.course-curriculum .accordion-button {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: #ffffff;
  font-weight: 600;
  color: #1f2a44;
}

.course-curriculum .accordion-button:focus {
  border: none;
  box-shadow: none;
}

.course-curriculum .accordion-button:not(.collapsed) {
  background: linear-gradient(135deg, rgba(31, 139, 236, 0.08), rgba(31, 139, 236, 0));
  color: #1f2a44;
}

.chapter-order {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #7f8c8d;
}

.chapter-title {
  flex: 1;
}

.chapter-meta {
  font-size: 0.85rem;
  background: rgba(31, 139, 236, 0.12);
  color: #1f8bec;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.chapter-description {
  color: #5e6c80;
  margin-bottom: 1rem;
}

.lesson-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.lesson-item {
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.03);
  border: 1px solid rgba(15, 23, 42, 0.06);
  overflow: hidden;
}

.lesson-toggle-btn {
  width: 100%;
  background: transparent;
  border: none;
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  gap: 1.25rem;
  transition: background 0.2s ease;
}

.lesson-toggle-btn:hover,
.lesson-toggle-btn:focus {
  background: rgba(31, 139, 236, 0.08);
  outline: none;
}

.lesson-toggle-main {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  flex: 1;
}

.lesson-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(31, 139, 236, 0.15);
  color: #1f8bec;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.lesson-summary h4 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
  color: #1f2a44;
}

.lesson-summary p {
  margin: 0;
  color: #5e6c80;
  font-size: 0.9rem;
}

.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: #1f2a44;
}

.lesson-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.06);
}

.lesson-toggle-icon {
  font-size: 1.1rem;
  color: #1f2a44;
  transition: transform 0.2s ease;
}

.lesson-toggle-btn.expanded .lesson-toggle-icon {
  transform: rotate(-180deg);
}

.lesson-details {
  border-top: 1px solid rgba(15, 23, 42, 0.06);
}

.lesson-details-body {
  padding: 1.25rem 1.5rem;
  background: rgba(255, 255, 255, 0.92);
}

.lesson-description {
  color: #495567;
  line-height: 1.7;
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.lesson-actions .btn {
  border-radius: 999px;
  font-weight: 600;
}

.empty-subsection {
  text-align: center;
  padding: 3rem 1.5rem;
  color: #5e6c80;
}

.empty-subsection i {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.instructor-panel .panel-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.course-sidebar {
  display: grid;
  gap: 1.5rem;
}

.enroll-card .price-tag {
  display: grid;
  gap: 0.25rem;
  text-align: center;
}

.enroll-card .amount {
  font-size: 2rem;
  font-weight: 700;
}

.enroll-card .tagline {
  font-size: 0.9rem;
  color: #7f8c8d;
}

.enroll-card .divider {
  height: 1px;
  background: rgba(15, 23, 42, 0.08);
  margin: 1.5rem 0;
}

.progress-widget {
  background: rgba(46, 204, 113, 0.1);
  padding: 1rem;
  border-radius: 14px;
}

.progress-widget .progress-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #27ae60;
  margin-bottom: 0.5rem;
  display: block;
}

.course-side-card .side-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #1f2a44;
}

.course-side-card .side-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
  color: #5e6c80;
  font-size: 0.92rem;
}

.course-side-card .side-card-list i {
  color: #1f8bec;
  margin-right: 0.6rem;
}

.share-buttons {
  display: inline-flex;
  gap: 0.75rem;
}

.share-button {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  color: #ffffff;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.share-button.share-facebook {
  background: linear-gradient(135deg, #3b5998, #2e4a86);
}

.share-button.share-telegram {
  background: linear-gradient(135deg, #2aabee, #229ed9);
}

.share-button.share-link {
  background: linear-gradient(135deg, #1f2a44, #0d1726);
}

.share-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 20px rgba(15, 23, 42, 0.2);
}

.share-button.copied {
  background: linear-gradient(135deg, #2ecc71, #27ae60);
}

/* Lesson detail */

.lesson-hero {
  padding-bottom: 3rem;
}

.lesson-meta-card {
  display: grid;
  gap: 0.25rem;
}

.lesson-body {
  background: linear-gradient(180deg, #f8f9fd 0%, #ffffff 100%);
}

.lesson-article {
  padding: 2.5rem;
  display: grid;
  gap: 1.5rem;
}

.lesson-article-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: #1f2a44;
}

.lesson-description {
  color: #495567;
  line-height: 1.75;
  white-space: pre-line;
}

.lesson-section-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1f2a44;
  margin-bottom: 0.75rem;
}

.lesson-media-player {
  border-radius: 20px;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.06);
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.lesson-media-player video {
  width: 100%;
  display: block;
  background: #0d1726;
}

.lesson-pdf-embed {
  height: 520px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.lesson-pdf-embed iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #ffffff;
}

.lesson-side-card {
  padding: 1.6rem;
  display: grid;
  gap: 1rem;
}

.lesson-outline {
  margin-top: 0.5rem;
}

.lesson-outline .list-group-item {
  border: none;
  padding-left: 0;
  padding-right: 0;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lesson-outline .list-group-item a {
  color: #1f2a44;
  text-decoration: none;
  transition: color 0.2s ease;
}

.lesson-outline .list-group-item a:hover {
  color: #1f8bec;
}

.lesson-outline .list-group-item.active {
  font-weight: 600;
  color: #1f8bec;
}

.lesson-quiz-card {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(255, 255, 255, 0.95));
  border-radius: 22px;
  padding: 1.75rem;
  border: 1px solid rgba(37, 99, 235, 0.1);
  box-shadow: 0 14px 32px rgba(37, 99, 235, 0.08);
}

.lesson-quiz-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.quiz-stat-pill {
  display: grid;
  place-items: center;
  padding: 0.75rem 1.25rem;
  background: rgba(15, 23, 42, 0.08);
  border-radius: 16px;
  text-align: center;
  min-width: 110px;
}

.quiz-stat-pill span {
  font-size: 1.4rem;
  font-weight: 700;
  color: #1f2a44;
}

.quiz-stat-pill small {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(15, 23, 42, 0.6);
}

.quiz-attempt-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.06);
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.quiz-attempt-summary .summary-score span {
  font-size: 1.8rem;
  font-weight: 700;
  color: #1f2a44;
  display: block;
}

.quiz-attempt-summary .summary-score small {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(15, 23, 42, 0.6);
}

.quiz-attempt-summary .summary-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
}

.quiz-attempt-summary .summary-status.passed {
  color: #15803d;
}

.quiz-attempt-summary .summary-status.pending {
  color: #b45309;
}

.quiz-take-body {
  background: linear-gradient(180deg, #f7f8fc 0%, #ffffff 100%);
}

.quiz-take-card {
  display: grid;
  gap: 1.75rem;
}

.quiz-result {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-radius: 18px;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.quiz-result--passed {
  background: linear-gradient(135deg, rgba(22, 163, 74, 0.12), rgba(22, 163, 74, 0.02));
}

.quiz-result--failed {
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.12), rgba(234, 179, 8, 0.02));
}

.quiz-result h3 {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
  color: #1f2a44;
}

.quiz-question-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.5rem;
}

.quiz-question {
  padding: 1.5rem;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.03);
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.quiz-question h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: #1f2a44;
  margin-bottom: 1rem;
}

.quiz-options {
  display: grid;
  gap: 0.75rem;
}

.quiz-option {
  position: relative;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(15, 23, 42, 0.08);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.quiz-option:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  border-color: rgba(37, 99, 235, 0.35);
}

.quiz-option input {
  appearance: none;
  width: 1rem;
  height: 1rem;
  border: 2px solid rgba(37, 99, 235, 0.5);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.quiz-option input:checked {
  border-width: 6px;
  border-color: var(--brand-primary-600, #2563eb);
}

.quiz-option.selected {
  border-color: var(--brand-primary-600, #2563eb);
  box-shadow: 0 14px 32px rgba(37, 99, 235, 0.12);
}

.quiz-option span {
  flex: 1;
  color: #1f2a44;
  font-weight: 500;
}

.answer-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  font-size: 0.85rem;
  margin-left: auto;
}

.answer-indicator--correct {
  background: rgba(22, 163, 74, 0.15);
  color: #15803d;
}

.answer-indicator--chosen {
  background: rgba(220, 38, 38, 0.15);
  color: #b91c1c;
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: flex-start;
  align-items: center;
}

.quiz-sidebar {
  gap: 1.25rem;
}

.quiz-attempt-list .list-group-item {
  border: none;
  padding-left: 0;
  padding-right: 0;
  background: transparent;
}

/* Progress experience */

.progress-hero {
  padding: 4.5rem 0 3rem;
  background: linear-gradient(135deg, rgba(16, 23, 35, 0.9), rgba(37, 99, 235, 0.65));
  color: #ffffff;
}

.progress-highlight-card {
  gap: 1rem;
}

.progress-meter {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
}

.progress-meter__value {
  font-size: 2.75rem;
  font-weight: 700;
}

.progress-meter__label {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  opacity: 0.7;
}

.progress-meter__bar {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  overflow: hidden;
}

.progress-meter__fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(135deg, #39a6ff, #2563eb);
}

.progress-metadata {
  display: grid;
  gap: 0.35rem;
  font-size: 0.85rem;
  opacity: 0.85;
}

.progress-overview-card {
  display: grid;
  gap: 1.75rem;
}

.progress-chapter-list {
  display: grid;
  gap: 1.5rem;
}

.progress-chapter-card {
  border-radius: 20px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(15, 23, 42, 0.03);
  padding: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.progress-chapter-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 35px rgba(15, 23, 42, 0.08);
}

.progress-chapter-card.is-complete {
  background: rgba(22, 163, 74, 0.08);
  border-color: rgba(22, 163, 74, 0.16);
}

.progress-chapter-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.progress-lesson-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.progress-lesson {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  border-radius: 16px;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(15, 23, 42, 0.05);
}

.progress-lesson .lesson-title a {
  color: inherit;
  text-decoration: none;
}

.progress-lesson .lesson-title a:hover {
  color: #2563eb;
}

.progress-lesson .lesson-meta {
  font-size: 0.85rem;
}

.progress-lesson .lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.progress-side-card {
  display: grid;
  gap: 1.25rem;
}

.progress-learners-table th {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: #5e6c80;
  border-bottom: 1px solid rgba(15, 23, 42, 0.1);
}

.progress-learners-table td {
  vertical-align: middle;
  border-top: 1px solid rgba(15, 23, 42, 0.05);
}

.progress-thin {
  height: 8px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.15);
  overflow: hidden;
}

.progress-thin .progress-bar {
  background: linear-gradient(135deg, #39a6ff, #2563eb);
}

.learner-name {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.attempt-score {
  min-width: 70px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
}

.progress-body {
  background: linear-gradient(180deg, #f7f8fc 0%, #ffffff 100%);
}

.progress-metric-grid {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  font-size: 0.85rem;
}

.progress-metric-grid .metric-value {
  display: block;
  font-weight: 600;
  font-size: 1.1rem;
}

.progress-metric-grid .metric-label {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  opacity: 0.7;
  font-size: 0.7rem;
}

@media (max-width: 767.98px) {
  .progress-lesson {
    flex-direction: column;
    align-items: flex-start;
  }

  .progress-chapter-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .progress-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Management dashboard */

.management-hero {
  padding-bottom: 3.5rem;
}

.management-stats.card-glass {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1.5rem;
}

.management-stats .stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #7f8c8d;
  display: block;
  margin-bottom: 0.35rem;
}

.management-stats .stat-value {
  font-size: 1.7rem;
  font-weight: 700;
  color: #1f2a44;
}

.management-body {
  background: linear-gradient(180deg, #f7f8fc 0%, #ffffff 100%);
}

.management-grid {
  display: grid;
  gap: 2rem;
}

.management-card {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.02), rgba(15, 23, 42, 0.05));
}

.management-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.management-card__title {
  font-size: 1.4rem;
  font-weight: 700;
  color: #1f2a44;
  margin: 0 0 0.35rem 0;
}

.management-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  font-size: 0.9rem;
  color: #5e6c80;
  margin: 0;
}

.management-card__description {
  color: #495567;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.management-accordion .accordion-button {
  font-weight: 600;
  color: #1f2a44;
  background: #ffffff;
}

.management-accordion .accordion-button:not(.collapsed) {
  background: linear-gradient(135deg, rgba(31, 139, 236, 0.12), rgba(31, 139, 236, 0));
  color: #1f2a44;
}

.management-chapter-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.5rem;
}

.management-chapter {
  background: rgba(15, 23, 42, 0.03);
  border-radius: 20px;
  padding: 1.5rem;
  border: 1px solid rgba(15, 23, 42, 0.06);
}

.chapter-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
}

.chapter-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.7rem;
  color: #7f8c8d;
  margin-bottom: 0.4rem;
}

.chapter-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1f2a44;
}

.chapter-description {
  color: #5e6c80;
  margin-bottom: 0;
}

.lesson-toggle {
  width: 100%;
  margin-top: 1rem;
  background: rgba(15, 23, 42, 0.06);
  border: none;
  border-radius: 16px;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  color: #1f2a44;
}

.lesson-manager {
  background: rgba(255, 255, 255, 0.92);
  border-radius: 18px;
  padding: 1.2rem;
  border: 1px solid rgba(15, 23, 42, 0.08);
  margin-top: 1rem;
}

.management-lesson-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.management-lesson {
  background: rgba(15, 23, 42, 0.04);
  border-radius: 14px;
  padding: 1.1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.lesson-title {
  font-size: 1rem;
  font-weight: 600;
  color: #1f2a44;
}

.lesson-description {
  color: #5e6c80;
}

.lesson-chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.lesson-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(31, 139, 236, 0.12);
  color: #1f8bec;
  font-size: 0.8rem;
}

.form-side-tip.card-glass {
  padding: 1.8rem;
  background: rgba(255, 255, 255, 0.85);
}

.form-side-tip h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #1f2a44;
}

.form-side-tip ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  color: #5e6c80;
  font-size: 0.95rem;
}

.course-form-body {
  background: linear-gradient(180deg, #f5f7fb 0%, #ffffff 100%);
}

.form-card {
  padding: 2.5rem;
}

.form-field .form-label {
  font-weight: 600;
  color: #1f2a44;
  margin-bottom: 0.5rem;
}

.form-field input[type="text"],
.form-field input[type="number"],
.form-field textarea {
  border-radius: 14px;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: rgba(255, 255, 255, 0.95);
  transition: border 0.2s ease, box-shadow 0.2s ease;
}

.form-field input[type="text"]:focus,
.form-field input[type="number"]:focus,
.form-field textarea:focus {
  border-color: rgba(31, 139, 236, 0.6);
  box-shadow: 0 12px 24px rgba(31, 139, 236, 0.16);
}

.form-field textarea {
  min-height: 160px;
}

.form-field .invalid-feedback {
  color: #e74c3c;
  font-size: 0.85rem;
}

@media (max-width: 991px) {
  .course-hero-stats {
    margin-top: 1.5rem;
  }

  .card-glass {
    padding: 1.6rem;
  }
}

@media (max-width: 768px) {
  .course-hero-meta {
    gap: 0.75rem;
  }

  .course-hero-stats {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }

  .course-tabs .nav-pills {
    gap: 0.5rem;
  }

  .management-card__header {
    flex-direction: column;
  }

  .management-stats.card-glass {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}

@media (max-width: 576px) {
  .management-stats.card-glass {
    grid-template-columns: 1fr;
  }

  .management-lesson {
    flex-direction: column;
  }

  .form-card {
    padding: 1.8rem;
  }

  .lesson-toggle-main {
    flex-direction: row;
  }

  .lesson-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .lesson-pdf-embed {
    height: 400px;
  }
}