/* Theme: Academia-style light eLearning (inspired by Colorlib Academia / Bootstrap edu demos) */
:root {
  --ac-page: #eef2f7;
  --ac-surface: #ffffff;
  --ac-surface-muted: #f4f7fb;
  --ac-surface-elevated: #eef2f6;
  --ac-border: #e2e8f0;
  --ac-text: #0f172a;
  --ac-muted: #64748b;
  --ac-primary: #1d4ed8;
  --ac-primary-light: #3b82f6;
  --ac-accent: #f59e0b;
  --ac-footer: #0b1120;
  --ac-footer-muted: #94a3b8;
  --on-primary: #ffffff;

  --fh: "Poppins", system-ui, -apple-system, sans-serif;
  --fb: "Poppins", system-ui, -apple-system, sans-serif;
  --r: 14px;
  --tr: all 0.25s ease;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 24px 60px -20px rgba(37, 99, 235, 0.12);

  /* Legacy names — used across existing rules */
  --navy: var(--ac-page);
  --navy-2: var(--ac-surface-muted);
  --navy-3: var(--ac-surface);
  --navy-4: var(--ac-surface-elevated);
  --gold: var(--ac-primary);
  --gold-light: var(--ac-primary-light);
  --white: var(--ac-text);
  --muted: var(--ac-muted);
  --red: #ef4444;
  --green: #059669;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  background: var(--ac-page);
  color: var(--ac-text);
  font-family: var(--fb);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ac-border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  font-family: var(--fh);
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ac-text);
}
.logo-gold {
  color: var(--ac-primary);
}
.logo-icon {
  color: var(--ac-accent);
  font-size: 20px;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 28px;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  transition: var(--tr);
}
.nav-links a:hover,
.nav-links a.nav-active {
  color: var(--ac-primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn-ghost {
  padding: 9px 20px;
  border: 2px solid var(--ac-primary);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ac-primary);
  font-family: var(--fb);
  cursor: pointer;
  transition: var(--tr);
  background: transparent;
}
.btn-ghost:hover {
  background: rgba(37, 99, 235, 0.08);
}
.btn-gold {
  padding: 10px 22px;
  background: linear-gradient(135deg, var(--ac-primary) 0%, #1e40af 100%);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 700;
  color: var(--on-primary);
  font-family: var(--fb);
  cursor: pointer;
  border: none;
  transition: var(--tr);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.btn-gold:hover {
  background: linear-gradient(135deg, var(--ac-primary-light) 0%, var(--ac-primary) 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.page-hero {
  padding: 110px 28px 56px;
  background: linear-gradient(180deg, #e8f0ff 0%, var(--ac-surface-muted) 55%, var(--ac-page) 100%);
  border-bottom: 1px solid var(--ac-border);
  text-align: center;
}
.sec-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--ac-primary);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.22);
  border-radius: 50px;
  padding: 5px 16px;
  margin-bottom: 16px;
}
.page-hero h1 {
  font-family: var(--fh);
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--ac-text);
}

/* Courses hero — India flag inspired palette */
body[data-page="courses"] .page-hero {
  background: linear-gradient(
    180deg,
    rgba(255, 153, 51, 0.16) 0%,
    #ffffff 52%,
    rgba(19, 136, 8, 0.14) 100%
  );
  border-bottom: 1px solid #c9d8ef;
}
body[data-page="courses"] .page-hero .sec-tag {
  color: #1a3c8f;
  background: rgba(26, 60, 143, 0.1);
  border-color: rgba(26, 60, 143, 0.25);
}
body[data-page="courses"] .page-hero h1 {
  color: #11203d;
}
body[data-page="courses"] .page-hero .gold {
  color: #1a3c8f;
}
body[data-page="courses"] .page-hero p {
  color: #415877;
}
body[data-page="courses"] .search-wrap input {
  border-color: #c9d8ef;
  background: #ffffff;
}
body[data-page="courses"] .search-wrap .btn-gold {
  background: linear-gradient(135deg, #1a3c8f 0%, #2b5fbf 100%);
  box-shadow: 0 6px 16px rgba(26, 60, 143, 0.35);
}
body[data-page="courses"] .admin-catalog-hint a {
  color: #1a3c8f;
}
.gold {
  color: var(--gold);
}
.page-hero p {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 28px;
}
.search-wrap {
  max-width: 580px;
  margin: 0 auto 20px;
  display: flex;
}
.search-wrap input {
  flex: 1;
  padding: 15px 20px;
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  border-right: none;
  border-radius: 50px 0 0 50px;
  color: var(--ac-text);
  font-family: var(--fb);
  font-size: 15px;
  outline: none;
  box-shadow: var(--shadow-sm);
}
.search-wrap input:focus {
  border-color: var(--ac-primary);
}
.search-wrap input::placeholder {
  color: var(--muted);
}
.search-wrap .btn-gold {
  border-radius: 0 50px 50px 0;
  padding: 15px 24px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-upload-hero {
  padding: 12px 28px;
  background: transparent;
  border: 2px solid var(--gold);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 700;
  color: var(--gold);
  font-family: var(--fb);
  cursor: pointer;
  transition: var(--tr);
  display: flex;
  align-items: center;
  gap: 8px;
}
.btn-upload-hero:hover {
  background: var(--ac-primary);
  color: var(--on-primary);
  transform: translateY(-2px);
}

.section {
  padding: 48px 28px 80px;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
}
.courses-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 36px;
  align-items: start;
}

.filter-panel {
  background: var(--navy-3);
  border: 1px solid var(--ac-border);
  border-radius: var(--r);
  padding: 28px;
  position: sticky;
  top: 88px;
  box-shadow: var(--shadow-card);
}
.filter-panel h3 {
  font-family: var(--fh);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--gold);
}
.fg {
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ac-border);
}
.fg:last-child {
  border: none;
  margin: 0;
  padding: 0;
}
.fg h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}
.fg label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  padding: 5px 0;
  transition: var(--tr);
}
.fg label:hover {
  color: var(--ac-text);
}
.fg input[type="checkbox"] {
  accent-color: var(--gold);
  width: 14px;
  height: 14px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.results-label {
  font-size: 13px;
  color: var(--muted);
}
.sort-sel {
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  color: var(--ac-text);
  padding: 8px 14px;
  border-radius: 8px;
  font-family: var(--fb);
  font-size: 13px;
  cursor: pointer;
  outline: none;
}
.btn-add-course {
  padding: 9px 20px;
  background: linear-gradient(135deg, var(--ac-primary) 0%, #1e40af 100%);
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--on-primary);
  font-family: var(--fb);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--tr);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.btn-add-course:hover {
  background: linear-gradient(135deg, var(--ac-primary-light) 0%, var(--ac-primary) 100%);
  transform: translateY(-1px);
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.course-card {
  background: var(--navy-3);
  border: 1px solid var(--ac-border);
  border-radius: var(--r);
  overflow: hidden;
  transition: var(--tr);
  cursor: pointer;
  box-shadow: var(--shadow-card);
}
.course-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: var(--shadow-lg);
}
.card-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--navy-4);
}
.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.course-card:hover .card-thumb img {
  transform: scale(1.05);
}
.card-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
}
.card-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}
.badge-free {
  background: rgba(76, 175, 130, 0.2);
  border: 1px solid var(--green);
  color: var(--green);
}
.badge-paid {
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid var(--ac-primary);
  color: var(--ac-primary);
}
.badge-yt {
  background: rgba(255, 0, 0, 0.15);
  border: 1px solid #ff4444;
  color: #ff6666;
}
.badge-upload {
  background: rgba(100, 149, 237, 0.15);
  border: 1px solid #6495ed;
  color: #7ba8f5;
}
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.45);
  opacity: 0;
  transition: var(--tr);
}
.course-card:hover .play-overlay {
  opacity: 1;
}
.play-btn {
  width: 48px;
  height: 48px;
  background: var(--ac-primary);
  color: var(--on-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.5);
}
.card-body {
  padding: 16px;
}
.card-category {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 6px;
}
.card-title {
  font-family: var(--fh);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--ac-text);
}
.card-instructor {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-rating {
  font-size: 12px;
  color: #f5c842;
}
.card-price {
  font-size: 14px;
  font-weight: 700;
  color: var(--gold);
}
.card-price.free {
  color: var(--green);
}
.card-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--ac-border);
}
.btn-card {
  flex: 1;
  padding: 8px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--tr);
  font-family: var(--fb);
  border: none;
}
.btn-card-primary {
  background: var(--ac-primary);
  color: var(--on-primary);
}
.btn-card-primary:hover {
  background: var(--ac-primary-light);
}
.btn-card-ghost {
  background: transparent;
  border: 1px solid var(--ac-border);
  color: var(--muted);
}
.btn-card-ghost:hover {
  border-color: var(--ac-primary);
  color: var(--ac-primary);
}
.btn-card-danger {
  background: transparent;
  border: 1px solid rgba(224, 82, 82, 0.3);
  color: var(--red);
}
.btn-card-danger:hover {
  background: rgba(224, 82, 82, 0.1);
}

.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 40px;
}
.pag-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  color: var(--ac-text);
  cursor: pointer;
  font-family: var(--fh);
  font-weight: 700;
  transition: var(--tr);
}
.pag-btn:hover,
.pag-btn.active {
  background: var(--ac-primary);
  color: var(--on-primary);
  border-color: var(--ac-primary);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.modal {
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  border-radius: 20px;
  padding: 36px;
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-lg);
}
.modal-overlay.open .modal {
  transform: translateY(0);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.modal-header h2 {
  font-family: var(--fh);
  font-size: 24px;
  font-weight: 800;
  color: var(--ac-text);
}
.modal-close {
  width: 36px;
  height: 36px;
  background: var(--ac-surface-elevated);
  border: 1px solid var(--ac-border);
  border-radius: 50%;
  color: var(--ac-text);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--tr);
}
.modal-close:hover {
  background: rgba(224, 82, 82, 0.2);
  color: var(--red);
}

.upload-tabs {
  display: flex;
  gap: 4px;
  background: var(--ac-surface-elevated);
  border: 1px solid var(--ac-border);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 28px;
}
.tab-btn {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--fb);
  transition: var(--tr);
  color: var(--muted);
  background: transparent;
}
.tab-btn.active {
  background: var(--ac-primary);
  color: var(--on-primary);
}

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--ac-surface-muted);
  border: 1px solid var(--ac-border);
  border-radius: 10px;
  color: var(--ac-text);
  font-family: var(--fb);
  font-size: 14px;
  outline: none;
  transition: var(--tr);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  background: rgba(37, 99, 235, 0.05);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--muted);
}
.form-group textarea {
  resize: vertical;
  min-height: 80px;
}
.form-group select option {
  background: var(--navy-3);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.drop-zone {
  border: 2px dashed rgba(37, 99, 235, 0.3);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: var(--tr);
  background: rgba(37, 99, 235, 0.02);
  position: relative;
}
.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--gold);
  background: rgba(37, 99, 235, 0.06);
}
.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.drop-zone-icon {
  font-size: 36px;
  margin-bottom: 12px;
}
.drop-zone-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--ac-text);
  margin-bottom: 4px;
}
.drop-zone-sub {
  font-size: 12px;
  color: var(--muted);
}
.file-preview {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--navy-4);
  border-radius: 8px;
  font-size: 13px;
  color: var(--gold);
  display: none;
}
.file-preview.show {
  display: block;
}

.yt-preview {
  margin-top: 12px;
  border-radius: 10px;
  overflow: hidden;
  display: none;
}
.yt-preview.show {
  display: block;
}
.yt-preview iframe {
  width: 100%;
  aspect-ratio: 16/9;
  border: none;
}

.thumb-upload-area {
  border: 2px dashed rgba(37, 99, 235, 0.2);
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  background: var(--navy-4);
  transition: var(--tr);
}
.thumb-upload-area:hover {
  border-color: var(--gold);
}
.thumb-upload-area input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.thumb-upload-area img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.thumb-placeholder {
  text-align: center;
}
.thumb-placeholder p {
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}

.btn-submit {
  width: 100%;
  padding: 15px;
  background: linear-gradient(135deg, var(--ac-primary) 0%, #1e40af 100%);
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 800;
  color: var(--on-primary);
  font-family: var(--fh);
  cursor: pointer;
  transition: var(--tr);
  letter-spacing: 0.5px;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}
.btn-submit:hover {
  background: linear-gradient(135deg, var(--ac-primary-light) 0%, var(--ac-primary) 100%);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.4);
}
.btn-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.video-modal-inner {
  max-width: 900px;
}
.video-frame {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
  margin-bottom: 20px;
}
.video-frame iframe,
.video-frame video {
  width: 100%;
  height: 100%;
  border: none;
}
.video-info h3 {
  font-family: var(--fh);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ac-text);
}
.video-info p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}
.video-meta-row {
  display: flex;
  gap: 20px;
  margin: 16px 0;
  flex-wrap: wrap;
}
.video-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.empty-state {
  text-align: center;
  padding: 80px 20px;
}
.empty-state-icon {
  font-size: 64px;
  margin-bottom: 16px;
  opacity: 0.5;
}
.empty-state h3 {
  font-family: var(--fh);
  font-size: 22px;
  margin-bottom: 8px;
  color: var(--muted);
}
.empty-state p {
  font-size: 14px;
  color: var(--muted);
  opacity: 0.6;
}

.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  padding: 14px 22px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  z-index: 999;
  transform: translateY(80px);
  opacity: 0;
  transition: all 0.4s ease;
  max-width: 340px;
}
.toast.show {
  transform: translateY(0);
  opacity: 1;
}
.toast.success {
  background: rgba(76, 175, 130, 0.15);
  border: 1px solid var(--green);
  color: var(--green);
}
.toast.error {
  background: rgba(224, 82, 82, 0.15);
  border: 1px solid var(--red);
  color: var(--red);
}

.site-footer {
  background: var(--ac-footer);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 28px;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--ac-footer-muted);
}
.site-footer-extended .footer-grid {
  border-bottom-color: rgba(255, 255, 255, 0.08);
}
.site-footer-extended .footer-desc,
.site-footer-extended .footer-links a {
  color: var(--ac-footer-muted);
}
.site-footer-extended .footer-links a:hover {
  color: #fff;
}
.site-footer-extended .footer-links h4 {
  color: var(--ac-accent);
}
.site-footer-extended .footer-logo,
.site-footer-extended .footer-brand-block .logo {
  color: #fff;
}
.site-footer-extended .logo-gold {
  color: var(--ac-primary-light);
}
.site-footer-extended .logo-icon {
  color: var(--ac-accent);
}

/* Home */
.home-hero {
  padding: 120px 28px 100px;
  text-align: center;
  background: radial-gradient(ellipse 90% 60% at 50% -15%, rgba(114, 165, 255, 0.18), transparent),
    linear-gradient(180deg, #0f2747 0%, #12335c 60%, #0f2747 100%);
}
.home-hero h1 {
  font-family: var(--fh);
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.15;
  color: #e8f1ff;
}
.home-hero .lead {
  max-width: 560px;
  margin: 0 auto 32px;
  color: #c8dbf7;
  font-size: 18px;
  line-height: 1.6;
}
.home-hero .sec-tag {
  color: #9cc2ff;
  background: rgba(156, 194, 255, 0.12);
  border-color: #3d6399;
}
.home-hero .gold {
  color: #72a5ff;
}
.home-hero .btn-gold {
  box-shadow: 0 6px 18px rgba(18, 66, 145, 0.45);
}
.home-hero .btn-ghost {
  color: #d8e8ff;
  border-color: #4b77b3;
  background: rgba(255, 255, 255, 0.02);
}
.home-hero .btn-ghost:hover {
  background: #1c4578;
  color: #ffffff;
}
.home-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.home-features {
  padding: 64px 28px;
  background: linear-gradient(180deg, rgba(26, 60, 143, 0.08) 0%, rgba(255, 255, 255, 0) 35%, rgba(19, 136, 8, 0.06) 100%);
}
.home-features h2 {
  font-family: var(--fh);
  text-align: center;
  font-size: 28px;
  margin-bottom: 40px;
  color: #1a3c8f;
}
.feature-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.feature-card {
  background: #ffffff;
  border: 1px solid #d7e2f2;
  border-radius: var(--r);
  padding: 28px;
  transition: var(--tr);
  box-shadow: var(--shadow-card);
  border-top: 5px solid transparent;
}
.feature-card:hover {
  border-color: #9cb8df;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.feature-card h3 {
  font-family: var(--fh);
  font-size: 18px;
  margin-bottom: 10px;
  color: #11203d;
}
.feature-card p {
  font-size: 14px;
  color: #4d6483;
  line-height: 1.55;
}

/* Home “Why Researchium” — 3D flip (hover on fine pointers, click/tap + keyboard everywhere) */
.feature-flip {
  perspective: 1200px;
  min-height: 260px;
  outline: none;
  cursor: pointer;
  border-radius: var(--r);
}
.feature-flip:focus-visible {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.45);
}
.feature-flip-inner {
  position: relative;
  width: 100%;
  min-height: 260px;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.4, 0.2, 0.2, 1);
}
.feature-flip-face.feature-card {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  height: 100%;
  margin: 0;
  overflow: auto;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  box-sizing: border-box;
}
.feature-flip-back {
  transform: rotateY(180deg);
}
@media (hover: hover) and (pointer: fine) {
  .feature-flip:hover .feature-flip-inner,
  .feature-flip:focus-within .feature-flip-inner {
    transform: rotateY(180deg);
  }
}
.feature-flip.is-flipped .feature-flip-inner {
  transform: rotateY(180deg);
}
.feature-flip-hint {
  margin-top: auto;
  padding-top: 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(148, 163, 184, 0.85);
}
.feature-flip-cta-muted {
  font-size: 12px;
  font-weight: 700;
  color: #1a3c8f;
  margin-top: 12px;
  display: inline-block;
}
.feature-flip-list {
  margin: 0 0 12px;
  padding-left: 1.15rem;
  font-size: 13px;
  color: #4d6483;
  line-height: 1.5;
}
.feature-flip-list li {
  margin-bottom: 4px;
}
.feature-flip-cta {
  margin-top: auto;
  font-size: 13px;
  font-weight: 700;
  color: #1a3c8f;
  text-decoration: none;
  align-self: flex-start;
}
.feature-flip-cta:hover {
  text-decoration: underline;
}
.feature-grid .feature-flip:nth-child(3n + 1) .feature-card {
  background: linear-gradient(180deg, rgba(255, 153, 51, 0.12) 0%, #ffffff 34%);
  border-top-color: #ff9933;
}
.feature-grid .feature-flip:nth-child(3n + 2) .feature-card {
  background: linear-gradient(180deg, rgba(26, 60, 143, 0.08) 0%, #ffffff 34%);
  border-top-color: #1a3c8f;
}
.feature-grid .feature-flip:nth-child(3n + 3) .feature-card {
  background: linear-gradient(180deg, rgba(19, 136, 8, 0.12) 0%, #ffffff 34%);
  border-top-color: #138808;
}
@media (prefers-reduced-motion: reduce) {
  .feature-flip-inner {
    transition-duration: 0.01ms;
  }
}

.loading-banner {
  text-align: center;
  padding: 24px;
  color: var(--muted);
  font-size: 14px;
}

.site-header-mount {
  min-height: 70px;
}
.site-footer-extended {
  text-align: left;
  padding-top: 48px;
  padding-bottom: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 36px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--ac-border);
  margin-bottom: 24px;
}
.footer-brand-block .footer-logo {
  display: inline-flex;
  margin-bottom: 14px;
}
.footer-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  max-width: 300px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 6px;
}
.footer-links a {
  font-size: 14px;
  color: var(--muted);
  transition: var(--tr);
}
.footer-links a:hover {
  color: var(--white);
}

.inner-main {
  padding-bottom: 64px;
}
.split-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 28px 48px;
}
.split-section p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 16px;
}
.split-section h2 {
  font-family: var(--fh);
  font-size: 26px;
  color: var(--gold);
  margin: 32px 0 16px;
}
.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
  justify-content: center;
}
.cta-row .btn-gold,
.cta-row .btn-ghost {
  display: inline-block;
  text-align: center;
}

.schedule-list {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 28px 48px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.schedule-row {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 16px;
  align-items: center;
  background: var(--navy-3);
  border: 1px solid var(--ac-border);
  border-radius: var(--r);
  padding: 18px 20px;
  transition: var(--tr);
  box-shadow: var(--shadow-card);
}
.schedule-row:hover {
  border-color: rgba(37, 99, 235, 0.25);
}
.schedule-time {
  font-weight: 700;
  color: var(--gold);
  font-size: 14px;
}
.schedule-title {
  font-family: var(--fh);
  font-weight: 700;
  font-size: 16px;
  color: var(--ac-text);
}
.schedule-meta {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}
.schedule-row a {
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  white-space: nowrap;
}
.schedule-row a:hover {
  color: var(--gold-light);
}

.blog-list {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 28px 48px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.blog-card {
  display: block;
  background: #ffffff;
  border: 1px solid #d7e2f2;
  border-radius: var(--r);
  padding: 22px 24px;
  transition: var(--tr);
  color: inherit;
  box-shadow: var(--shadow-card);
  border-left-width: 6px;
}
.blog-card:hover {
  border-color: #9cb8df;
  transform: translateY(-2px);
}
.blog-card .blog-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: #1a3c8f;
  margin-bottom: 8px;
}
.blog-card h3 {
  font-family: var(--fh);
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--ac-text);
}
.blog-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
}
.blog-card:nth-child(3n + 1) {
  background: linear-gradient(90deg, rgba(255, 153, 51, 0.12) 0%, #ffffff 16%);
  border-left-color: #ff9933;
}
.blog-card:nth-child(3n + 2) {
  background: linear-gradient(90deg, rgba(26, 60, 143, 0.08) 0%, #ffffff 16%);
  border-left-color: #1a3c8f;
}
.blog-card:nth-child(3n + 3) {
  background: linear-gradient(90deg, rgba(19, 136, 8, 0.12) 0%, #ffffff 16%);
  border-left-color: #138808;
}

.pricing-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px 56px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.pricing-card {
  background: #0f2747;
  border: 1px solid #1f3f6e;
  border-radius: 18px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: var(--tr);
  box-shadow: 0 8px 28px rgba(8, 23, 45, 0.35);
}
.pricing-card.featured {
  border-color: #4b77b3;
  box-shadow: 0 14px 36px rgba(9, 28, 58, 0.45);
}
.pricing-card h3 {
  font-family: var(--fh);
  font-size: 20px;
  margin-bottom: 8px;
  color: #e8f1ff;
}
.pricing-card .price {
  font-size: 32px;
  font-weight: 800;
  font-family: var(--fh);
  color: #72a5ff;
  margin-bottom: 16px;
}
.pricing-card .price small {
  font-size: 14px;
  font-weight: 600;
  color: #aac6ee;
}
.pricing-card ul {
  list-style: none;
  margin-bottom: 24px;
  flex: 1;
}
.pricing-card li {
  font-size: 14px;
  color: #d7e6fb;
  padding: 8px 0;
  border-bottom: 1px solid #274d81;
  padding-left: 22px;
  position: relative;
}
.pricing-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-size: 12px;
}
.pricing-card .btn-gold,
.pricing-card .btn-ghost {
  width: 100%;
  text-align: center;
  display: block;
  border-radius: 10px;
  padding: 12px;
  font-weight: 700;
  font-size: 14px;
}
.pricing-card .btn-ghost {
  border-color: #3e5f8d;
  color: #d8e8ff;
  background: rgba(255, 255, 255, 0.02);
}
.pricing-card .btn-ghost:hover {
  background: #1c4578;
  color: #ffffff;
}
.pricing-card .btn-gold {
  box-shadow: 0 6px 18px rgba(18, 66, 145, 0.45);
}
.pricing-demo-note {
  color: #b5ceee;
}

.about-grid {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 28px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}
.about-stat {
  background: #ffffff;
  border: 1px solid #d7e2f2;
  border-radius: var(--r);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  border-top-width: 6px;
}
.about-stat strong {
  display: block;
  font-family: var(--fh);
  font-size: 36px;
  color: #1a3c8f;
  margin-bottom: 6px;
}
.about-stat span {
  font-size: 13px;
  color: #4d6483;
}
.about-stat:nth-child(3n + 1) {
  background: linear-gradient(180deg, rgba(255, 153, 51, 0.12) 0%, #ffffff 38%);
  border-top-color: #ff9933;
}
.about-stat:nth-child(3n + 2) {
  background: linear-gradient(180deg, rgba(26, 60, 143, 0.08) 0%, #ffffff 38%);
  border-top-color: #1a3c8f;
}
.about-stat:nth-child(3n + 3) {
  background: linear-gradient(180deg, rgba(19, 136, 8, 0.12) 0%, #ffffff 38%);
  border-top-color: #138808;
}

.signin-wrap {
  max-width: 420px;
  margin: 0 auto;
  padding: 0 28px 64px;
}
.signin-card {
  background: var(--navy-3);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 20px;
  padding: 32px;
}
.signin-card h2 {
  font-family: var(--fh);
  font-size: 22px;
  margin-bottom: 8px;
  color: var(--ac-text);
}
.signin-card .sub {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 24px;
}
.signin-foot {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--muted);
}
.signin-foot a {
  color: var(--gold);
  font-weight: 600;
}

.feature-card-link {
  display: block;
  color: inherit;
}
.feature-card-link:hover {
  border-color: rgba(37, 99, 235, 0.35);
}

.program-strip {
  padding: 48px 28px 72px;
  background: linear-gradient(180deg, #0f2747 0%, #12335c 100%);
  border-top: 1px solid #274d81;
}
.program-strip h2 {
  font-family: var(--fh);
  text-align: center;
  font-size: 26px;
  margin-bottom: 32px;
  color: #e8f1ff;
}
.program-mini-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.program-pill {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  background: #0f2747;
  border: 1px solid #1f3f6e;
  border-radius: var(--r);
  color: #e8f1ff;
  transition: var(--tr);
  box-shadow: 0 8px 24px rgba(8, 23, 45, 0.35);
}
.program-pill:hover {
  border-color: #4b77b3;
  background: #12335c;
}
.program-pill span.icon {
  font-size: 24px;
}
.program-pill span.label {
  font-weight: 600;
  font-size: 14px;
  color: #e8f1ff;
}
.program-pill span.hint {
  display: block;
  font-size: 12px;
  color: #c8dbf7;
  font-weight: 400;
  margin-top: 2px;
}

.jee-neet-strip {
  padding: 56px 28px 72px;
  background: linear-gradient(
    180deg,
    rgba(255, 153, 51, 0.16) 0%,
    #ffffff 52%,
    rgba(19, 136, 8, 0.14) 100%
  );
  border-top: 1px solid #d7e2f2;
}
.jee-neet-strip h2 {
  font-family: var(--fh);
  text-align: center;
  font-size: 28px;
  color: #11203d;
  margin-bottom: 10px;
}
.jee-neet-sub {
  text-align: center;
  color: #415877;
  font-size: 14px;
  margin-bottom: 26px;
}
.jee-neet-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.jee-neet-card {
  display: block;
  background: #ffffff;
  border: 1px solid #d7e2f2;
  border-radius: var(--r);
  overflow: hidden;
  color: #11203d;
  transition: var(--tr);
  box-shadow: var(--shadow-card);
  border-top: 5px solid transparent;
}
.jee-neet-card:hover {
  border-color: #9cb8df;
  transform: translateY(-2px);
}
.jee-neet-thumb {
  aspect-ratio: 16 / 9;
  width: 100%;
  object-fit: cover;
  display: block;
  background: #0b1d36;
}
.jee-neet-body {
  padding: 12px 14px;
}
.jee-neet-title {
  display: block;
  font-size: 13px;
  line-height: 1.45;
  font-weight: 600;
  color: #11203d;
}
.jee-neet-cta {
  margin-top: 24px;
}
.jee-neet-grid .jee-neet-card:nth-child(3n + 1) {
  background: linear-gradient(180deg, rgba(255, 153, 51, 0.12) 0%, #ffffff 34%);
  border-top-color: #ff9933;
}
.jee-neet-grid .jee-neet-card:nth-child(3n + 2) {
  background: linear-gradient(180deg, rgba(26, 60, 143, 0.08) 0%, #ffffff 34%);
  border-top-color: #1a3c8f;
}
.jee-neet-grid .jee-neet-card:nth-child(3n + 3) {
  background: linear-gradient(180deg, rgba(19, 136, 8, 0.12) 0%, #ffffff 34%);
  border-top-color: #138808;
}

.why-feature-details {
  max-width: 760px;
  margin: 0 auto;
}
.why-feature-details ul {
  margin: 0;
  padding-left: 20px;
}
.why-feature-details li {
  color: var(--muted);
  margin-bottom: 12px;
  line-height: 1.65;
  font-size: 15px;
}

.mcq-spotlight {
  padding: 48px 28px 64px;
  text-align: center;
  background: linear-gradient(180deg, rgba(26, 60, 143, 0.08) 0%, rgba(19, 136, 8, 0.08) 100%);
  border-top: 1px solid #d7e2f2;
}
.mcq-spotlight h2 {
  font-family: var(--fh);
  font-size: 28px;
  margin-bottom: 10px;
  color: #11203d;
}
.mcq-spotlight p {
  color: #415877;
  margin-bottom: 20px;
}
.mcq-control-card {
  max-width: 760px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid #d7e2f2;
  border-radius: var(--r);
  padding: 20px;
  box-shadow: var(--shadow-card);
}
.mcq-row {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 14px;
  margin-bottom: 10px;
}
.mcq-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.mcq-card {
  background: #ffffff;
  border: 1px solid #d7e2f2;
  border-radius: var(--r);
  padding: 16px;
}
.mcq-q {
  color: #11203d;
  margin-bottom: 10px;
  line-height: 1.6;
}
.mcq-option {
  display: block;
  padding: 8px 0;
  color: #415877;
}
.mcq-option input {
  margin-right: 8px;
}
@media (max-width: 700px) {
  .mcq-row {
    grid-template-columns: 1fr;
  }
}

/* YouTube playlist hub (live-classes) */
.yt-playlist-section {
  padding-top: 32px;
  padding-bottom: 24px;
  background: linear-gradient(180deg, var(--ac-page) 0%, var(--ac-surface-muted) 45%, var(--ac-page) 100%);
  border-top: 1px solid var(--ac-border);
  border-bottom: 1px solid var(--ac-border);
}
#yt-playlist-root {
  max-width: 1120px;
  margin: 0 auto;
}
.yt-pl-head {
  text-align: center;
  margin-bottom: 28px;
}
.yt-pl-head h2 {
  font-family: var(--fh);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  color: var(--ac-text);
  margin-bottom: 10px;
}
.yt-pl-sub {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
  max-width: 640px;
  margin: 0 auto;
}
.yt-pl-sub code {
  font-size: 12px;
  background: var(--ac-surface-elevated);
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid var(--ac-border);
}
.yt-pl-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 24px;
  padding: 14px 18px;
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  border-radius: var(--r);
  box-shadow: var(--shadow-sm);
}
.yt-pl-sort-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gold);
}
.yt-pl-sort {
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--ac-border);
  background: var(--ac-surface-muted);
  font-family: var(--fb);
  font-size: 13px;
  color: var(--ac-text);
  cursor: pointer;
  outline: none;
}
.yt-pl-sort:focus {
  border-color: var(--ac-primary);
}
.yt-pl-hint {
  font-size: 12px;
  color: var(--muted);
  flex: 1 1 220px;
  line-height: 1.5;
}
.yt-pl-hint code {
  font-size: 11px;
  background: var(--ac-surface-elevated);
  padding: 1px 5px;
  border-radius: 4px;
}
.yt-pl-hub {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 340px);
  gap: 24px;
  align-items: start;
}
.yt-pl-stage-wrap {
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  border-radius: 18px;
  padding: 16px;
  box-shadow: var(--shadow-card);
}
.yt-pl-ratio {
  position: relative;
  width: 100%;
  border-radius: 14px;
  overflow: hidden;
  background: #0f172a;
  aspect-ratio: 16 / 9;
}
.yt-pl-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}
.yt-pl-now {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--ac-border);
}
.yt-pl-now-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--ac-primary);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.22);
  border-radius: 50px;
  padding: 4px 12px;
  margin-bottom: 10px;
}
.yt-pl-now h3 {
  font-family: var(--fh);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ac-text);
  margin-bottom: 6px;
}
.yt-pl-channel {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}
.yt-pl-open-yt {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ac-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.yt-pl-open-yt:hover {
  color: var(--ac-primary-light);
}
.yt-pl-queue {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: min(72vh, 640px);
  overflow-y: auto;
  padding: 4px;
  position: sticky;
  top: 88px;
}
.yt-pl-item {
  display: grid;
  grid-template-columns: 32px 100px 1fr;
  gap: 12px;
  align-items: center;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--ac-border);
  background: var(--ac-surface);
  cursor: pointer;
  font-family: var(--fb);
  transition: var(--tr);
  box-shadow: var(--shadow-sm);
}
.yt-pl-item:hover {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: var(--shadow-lg);
}
.yt-pl-item.is-active {
  border-color: var(--ac-primary);
  background: rgba(37, 99, 235, 0.06);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.15);
}
.yt-pl-idx {
  font-size: 12px;
  font-weight: 800;
  color: var(--muted);
  text-align: center;
}
.yt-pl-item.is-active .yt-pl-idx {
  color: var(--ac-primary);
}
.yt-pl-thumb {
  display: block;
  width: 100px;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  background-size: cover;
  background-position: center;
  background-color: var(--ac-surface-elevated);
  position: relative;
  overflow: hidden;
}
.yt-pl-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, transparent 40%, rgba(15, 23, 42, 0.35));
  opacity: 0.85;
  transition: var(--tr);
}
.yt-pl-item:hover .yt-pl-thumb::after,
.yt-pl-item.is-active .yt-pl-thumb::after {
  opacity: 0.5;
}
.yt-pl-item-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.yt-pl-item-title {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ac-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.yt-pl-item-meta {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
}
.yt-pl-views {
  font-weight: 600;
  color: var(--green);
}
.yt-pl-note {
  font-weight: 400;
  color: var(--muted);
}
.yt-pl-loading,
.yt-pl-error,
.yt-pl-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}
.yt-pl-error {
  color: var(--red);
}

.admin-catalog-hint {
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  margin-top: 16px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}
.admin-catalog-hint a {
  color: var(--ac-primary);
  font-weight: 600;
}

/* Admin panel */
.admin-shell {
  padding-top: 96px;
  padding-bottom: 56px;
}
.admin-login-card,
.admin-dash {
  max-width: 1100px;
}
.admin-title {
  font-family: var(--fh);
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--ac-text);
}
.admin-lead {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: 20px;
}
.admin-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.admin-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--gold);
}
.admin-input,
.admin-textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--ac-border);
  background: var(--ac-surface-muted);
  font-family: var(--fb);
  font-size: 14px;
  color: var(--ac-text);
}
.admin-textarea {
  resize: vertical;
}
.admin-monospace {
  font-family: ui-monospace, monospace;
  font-size: 12px;
}
.admin-login-btn {
  width: 100%;
  margin-top: 8px;
  border-radius: 12px;
  padding: 14px;
}
.admin-err {
  color: var(--red);
  font-size: 13px;
  margin-top: 10px;
}
.admin-hint {
  margin-top: 20px;
  font-size: 13px;
}
.admin-hint a {
  color: var(--ac-primary);
  font-weight: 600;
}
.admin-dash-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}
.admin-dash-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.admin-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.admin-tab {
  padding: 10px 18px;
  border-radius: 50px;
  border: 1px solid var(--ac-border);
  background: var(--ac-surface);
  font-family: var(--fb);
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: var(--tr);
}
.admin-tab:hover {
  border-color: rgba(37, 99, 235, 0.35);
  color: var(--ac-text);
}
.admin-tab.active {
  background: var(--ac-primary);
  color: var(--on-primary);
  border-color: var(--ac-primary);
}
.admin-panel {
  margin-bottom: 40px;
}
.admin-panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ac-border);
}
.admin-panel-head h2 {
  font-family: var(--fh);
  font-size: 20px;
  font-weight: 800;
  color: var(--ac-text);
}
.admin-muted {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}
.admin-table-wrap {
  overflow-x: auto;
  background: #0f2747;
  border: 1px solid #1f3f6e;
  border-radius: var(--r);
  box-shadow: 0 8px 28px rgba(8, 23, 45, 0.35);
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  color: #e8f1ff;
}
.admin-table th,
.admin-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid #274d81;
  vertical-align: top;
}
.admin-table th {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #9cc2ff;
  background: #12335c;
}
.admin-table tbody tr:hover {
  background: rgba(156, 194, 255, 0.08);
}
.admin-table td .btn-card-ghost {
  color: #d8e8ff;
  border-color: #3e5f8d;
}
.admin-table td .btn-card-ghost:hover {
  background: #1c4578;
  color: #ffffff;
}
.admin-td-actions {
  white-space: nowrap;
}
.admin-playlist-card {
  margin-bottom: 24px;
}
.admin-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--ac-text);
  margin-top: 12px;
  line-height: 1.45;
  cursor: pointer;
}
.admin-check input {
  margin-top: 3px;
  accent-color: var(--ac-primary);
  flex-shrink: 0;
}

.admin-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}
.admin-card {
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  border-radius: var(--r);
  padding: 22px;
  box-shadow: var(--shadow-card);
}
.admin-card h3 {
  font-family: var(--fh);
  font-size: 16px;
  margin-bottom: 14px;
  color: var(--ac-text);
}
.admin-row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.admin-course-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 560px;
  overflow-y: auto;
}
.admin-course-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--ac-border);
  border-radius: 10px;
  background: var(--ac-surface-muted);
}
.schedule-editor {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.schedule-edit-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  padding: 14px;
  border-radius: 12px;
  border: 1px dashed var(--ac-border);
  background: var(--ac-surface-muted);
}
.schedule-edit-row label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  grid-column: 1 / -1;
  margin-bottom: -4px;
}
.page-copy-editor {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.page-copy-block .admin-label {
  margin-top: 8px;
}
.admin-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 20px;
  border-radius: 12px;
  background: rgba(5, 150, 105, 0.12);
  border: 1px solid var(--green);
  color: var(--green);
  font-size: 14px;
  font-weight: 600;
  z-index: 300;
  box-shadow: var(--shadow-lg);
}
.admin-toast.is-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--red);
  color: var(--red);
}
.admin-modal {
  max-width: 520px;
}

/* Dedicated watch page + paid gate */
.watch-page {
  padding-top: 96px;
  padding-bottom: 48px;
}
.watch-toolbar {
  max-width: 1280px;
  margin: 0 auto 20px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.watch-refresh-note {
  font-size: 12px;
  color: var(--muted);
}
.watch-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1fr minmax(260px, 320px);
  gap: 28px;
  align-items: start;
}
.watch-primary {
  min-width: 0;
}
.watch-error {
  padding: 16px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--red);
  border-radius: var(--r);
  color: var(--red);
  margin-bottom: 16px;
  font-size: 14px;
}
.watch-meta-block {
  margin-bottom: 8px;
}
.watch-title {
  font-family: var(--fh);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  margin: 8px 0;
  color: var(--ac-text);
  line-height: 1.2;
}
.watch-instructor {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
}
.watch-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 72ch;
}
.watch-player-host {
  margin-top: 16px;
}
.watch-frame {
  border-radius: 16px;
  overflow: hidden;
  background: #000;
}
.watch-paywall {
  margin-top: 16px;
  padding: 28px;
  border-radius: 16px;
  border: 1px solid rgba(37, 99, 235, 0.25);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), var(--ac-surface-muted));
}
.watch-paywall-inner h2 {
  font-family: var(--fh);
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--ac-text);
}
.watch-paywall-inner p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.watch-paywall-foot {
  margin-top: 16px !important;
  margin-bottom: 0 !important;
  font-size: 13px !important;
}
.watch-paywall-foot a {
  color: var(--ac-primary);
  font-weight: 600;
}
.watch-no-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
  color: var(--muted);
  font-size: 15px;
}
.watch-sidebar {
  position: sticky;
  top: 88px;
  background: var(--ac-surface);
  border: 1px solid var(--ac-border);
  border-radius: var(--r);
  padding: 20px;
  box-shadow: var(--shadow-card);
  max-height: calc(100vh - 120px);
  display: flex;
  flex-direction: column;
}
.watch-sidebar-head h2 {
  font-family: var(--fh);
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--ac-text);
}
.watch-sidebar-hint {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 14px;
}
.watch-list {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  min-height: 120px;
}
.watch-list-item {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--ac-border);
  background: var(--ac-surface-muted);
  color: inherit;
  text-decoration: none;
  transition: var(--tr);
}
.watch-list-item:hover {
  border-color: rgba(37, 99, 235, 0.35);
}
.watch-list-item.is-active {
  border-color: var(--ac-primary);
  background: rgba(37, 99, 235, 0.08);
}
.watch-list-item.is-locked {
  opacity: 0.95;
}
.watch-list-title {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  display: block;
  margin-bottom: 4px;
  color: var(--ac-text);
}
.watch-lock {
  margin-left: 6px;
}
.watch-list-meta {
  font-size: 11px;
  color: var(--muted);
}
.watch-side-price {
  color: var(--ac-primary);
  font-weight: 600;
}
.watch-side-free {
  color: var(--green);
  font-weight: 600;
}
.watch-list-empty {
  font-size: 13px;
  color: var(--muted);
  padding: 12px;
}
.pricing-demo-note {
  font-size: 11px;
  color: var(--muted);
  margin-top: 12px;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .admin-two-col {
    grid-template-columns: 1fr;
  }
  .yt-pl-hub {
    grid-template-columns: 1fr;
  }
  .watch-layout {
    grid-template-columns: 1fr;
  }
  .watch-sidebar {
    position: static;
    max-height: none;
  }
  .yt-pl-queue {
    max-height: none;
    position: static;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .schedule-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .courses-layout {
    grid-template-columns: 1fr;
  }
  .filter-panel {
    position: static;
  }
}
@media (max-width: 600px) {
  .nav-links,
  .nav-actions {
    display: none;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* --- CSP-friendly utilities (no inline style= in HTML) --- */
.u-hidden {
  display: none !important;
}
.u-inline-block {
  display: inline-block;
}
.u-inline-flex-centergap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.u-rounded-pill {
  border-radius: 50px;
}
.u-rounded-10 {
  border-radius: 10px;
}
.u-rounded-12 {
  border-radius: 12px;
}
.u-link-gold {
  color: var(--gold);
  font-weight: 600;
}
.u-link-gold-soft {
  color: var(--gold);
}
.u-btn-outline-blue {
  border: 1px solid rgba(37, 99, 235, 0.35);
}
.u-pro-unlock-btn {
  width: 100%;
  border: none;
  cursor: pointer;
  font: inherit;
}
.page-hero--pb-32 {
  padding-bottom: 32px;
}
.page-hero--pb-24 {
  padding-bottom: 24px;
}
.u-watch-upgrade {
  display: inline-block;
  border-radius: 12px;
  padding: 12px 24px;
}
.u-span-courses-grid {
  grid-column: 1 / -1;
}
.admin-login-info {
  margin-top: -4px;
  margin-bottom: 10px;
}
.admin-password-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
.admin-input-flex {
  flex: 1;
}
.admin-btn-toggle-pw {
  border-radius: 10px;
  flex-shrink: 0;
}
.admin-dash-pill {
  border-radius: 50px;
}
.admin-row2-mt-12 {
  margin-top: 12px;
}
.admin-btn-import {
  margin-top: 14px;
  border-radius: 12px;
  width: 100%;
}
.admin-import-result-mt {
  margin-top: 12px;
}
.upload-tabs-mb {
  margin-bottom: 16px;
}
.admin-submit-full {
  width: 100%;
  margin-top: 12px;
  border-radius: 12px;
}
.admin-danger-full {
  width: 100%;
  margin-bottom: 12px;
  padding: 10px;
  border-radius: 10px;
}
.admin-card-mb-20 {
  margin-bottom: 20px;
}
.admin-panel-head-plain {
  margin-bottom: 12px;
  border: none;
  padding: 0;
}
.admin-modal-save-full {
  width: 100%;
  margin-top: 16px;
  border-radius: 12px;
}