.classes-page .classes-hero {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%);
  color: var(--cream);
  padding: 96px 0 56px;
}

.classes-page .classes-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 16px 0 14px;
  color: var(--cream);
}

.classes-page .classes-hero .lead {
  max-width: 720px;
  color: rgba(245, 239, 224, 0.82);
  margin-bottom: 28px;
}

.classes-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.classes-tab {
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid rgba(245, 239, 224, 0.35);
  color: var(--cream);
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.classes-tab:hover,
.classes-tab.active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--navy);
}

.classes-content {
  padding: 56px 0 80px;
  background: var(--cream);
}

.classes-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}

.classes-main {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.player-card,
.material-section,
.upload-panel,
.document-card {
  background: #fff;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(11, 22, 40, 0.06);
}

.player-card {
  padding: 24px;
}

.player-card h2,
.material-section h3,
.upload-panel h3 {
  font-family: var(--serif);
  color: var(--navy);
  margin-bottom: 16px;
}

.video-player {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 6px;
  overflow: hidden;
}

.video-player iframe,
.video-player video {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.video-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  background: var(--paper);
  color: #666;
  border-radius: 6px;
}

.material-description {
  margin-top: 16px;
  color: #555;
  line-height: 1.6;
}

.material-section {
  padding: 24px;
}

.material-list {
  display: grid;
  gap: 12px;
}

.material-item {
  display: flex;
  align-items: stretch;
  gap: 12px;
  width: 100%;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: 6px;
  background: var(--paper);
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.material-item:hover,
.material-item.active {
  border-color: var(--gold);
  transform: translateY(-1px);
}

.material-item-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 16px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.material-item-body strong {
  color: var(--navy);
  font-size: 1rem;
}

.material-item-body span {
  color: #666;
  font-size: 0.92rem;
  line-height: 1.5;
}

.material-delete-btn {
  align-self: center;
  margin-right: 12px;
  flex-shrink: 0;
}

.player-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.player-card-header h2 {
  margin-bottom: 0;
}

.btn-danger {
  background: #b42318;
  color: #fff;
  border: none;
}

.btn-danger:hover {
  background: #912018;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
}

.material-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(201, 162, 39, 0.15);
  color: var(--maroon);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.material-delete {
  color: #b42318 !important;
  font-weight: 600;
}

.player-card-header .btn-danger {
  flex-shrink: 0;
}

.document-list {
  display: grid;
  gap: 16px;
}

.document-card {
  padding: 20px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

.document-card h4 {
  margin: 8px 0;
  color: var(--navy);
}

.document-card p {
  color: #555;
  line-height: 1.5;
}

.document-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: #777;
}

.document-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 150px;
}

.upload-panel {
  padding: 24px;
  position: sticky;
  top: 96px;
}

.upload-panel form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.upload-panel label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--navy);
}

.upload-panel input,
.upload-panel textarea,
.upload-panel select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font: inherit;
}

.classes-status,
.classes-empty {
  color: #666;
}

.classes-error {
  color: #b42318;
  font-weight: 600;
}

.upload-success {
  color: #1f7a3f;
  font-weight: 600;
}

.upload-hint {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  color: #666;
  line-height: 1.4;
}

.upload-form-block {
  position: relative;
}

.upload-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 24px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.92);
  text-align: center;
}

.upload-overlay strong {
  color: var(--navy);
  font-size: 0.95rem;
}

.upload-overlay p {
  margin: 0;
  max-width: 220px;
  color: #666;
  font-size: 0.85rem;
  line-height: 1.45;
}

.upload-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(201, 162, 39, 0.25);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: upload-spin 0.8s linear infinite;
}

@keyframes upload-spin {
  to {
    transform: rotate(360deg);
  }
}

.upload-form-block input:disabled,
.upload-form-block textarea:disabled,
.upload-form-block select:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.upload-form-error {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.45;
}

.courses-layout {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.courses-banner {
  margin: 0;
}

.courses-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}

.courses-sidebar h3,
.courses-main h3 {
  font-family: var(--serif);
  color: var(--navy);
  margin-bottom: 16px;
}

.courses-sidebar {
  padding: 20px;
  background: #fff;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(11, 22, 40, 0.05);
}

.course-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
  padding: 16px 16px 16px 18px;
  margin-bottom: 12px;
  border: 1px solid rgba(11, 22, 40, 0.12);
  border-left: 4px solid rgba(11, 22, 40, 0.15);
  border-radius: 8px;
  background: var(--paper);
  text-align: left;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(11, 22, 40, 0.04);
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.course-card:last-child {
  margin-bottom: 0;
}

.course-card:hover {
  border-color: rgba(201, 162, 39, 0.45);
  border-left-color: var(--gold);
  background: #fff;
  box-shadow: 0 6px 18px rgba(11, 22, 40, 0.08);
  transform: translateY(-1px);
}

.course-card.active {
  border-color: var(--gold);
  border-left-color: var(--gold);
  background: #fff;
  box-shadow: 0 8px 22px rgba(201, 162, 39, 0.18);
}

.course-card strong {
  color: var(--navy);
  font-size: 1rem;
  line-height: 1.35;
}

.course-card span {
  color: #3d4654;
  font-size: 0.92rem;
  line-height: 1.55;
}

.course-card.active strong {
  color: var(--navy);
}

.course-progress {
  width: 100%;
  margin-top: 6px;
  padding-top: 10px;
  border-top: 1px solid rgba(11, 22, 40, 0.08);
}

.progress-bar {
  height: 8px;
  background: #ddd4c0;
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 6px;
}

.course-card.active .progress-bar {
  background: #ece6d6;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold), #e8b400);
  border-radius: 999px;
}

.course-progress span {
  font-size: 0.8rem;
  font-family: var(--mono);
  color: #4a5568;
  font-weight: 600;
}

.course-card.active .course-progress span {
  color: var(--navy);
}

.course-delete,
.topic-delete {
  color: #b42318 !important;
  font-size: 0.82rem;
  font-weight: 600;
}

.topic-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.topic-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
  color: var(--navy);
  font-weight: 600;
}

.topic-tab.active {
  background: var(--navy);
  color: var(--cream);
  border-color: var(--navy);
}

.topic-progress {
  font-size: 0.75rem;
  font-family: var(--mono);
  opacity: 0.85;
}

.course-topic-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #777;
  margin-bottom: 6px;
}

.player-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.watched-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(31, 122, 63, 0.12);
  color: #1f7a3f;
  font-size: 0.82rem;
  font-weight: 700;
}

.course-form-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(201, 162, 39, 0.18);
}

.course-form-block:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.course-form-block h4 {
  color: var(--navy);
  font-size: 0.95rem;
  margin: 0;
}

.courses-upload-panel {
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.courses-grid-locked {
  grid-template-columns: 320px minmax(0, 1fr);
}

.course-card.locked {
  cursor: default;
  opacity: 1;
  background: var(--paper);
}

.course-card.locked strong {
  color: var(--navy);
}

.course-card.locked span {
  color: #3d4654;
}

.course-lock-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: #777;
}

.locked-label {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(180, 35, 24, 0.12);
  color: #b42318;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.enroll-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
}

.enroll-card {
  width: min(100%, 640px);
  padding: 40px;
  background: #fff;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(11, 22, 40, 0.06);
  text-align: center;
}

.enroll-card h2 {
  font-family: var(--serif);
  color: var(--navy);
  margin: 12px 0 16px;
}

.enroll-card p {
  color: #555;
  line-height: 1.6;
}

.enroll-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

.enroll-note {
  margin-top: 20px;
  font-size: 0.9rem;
  color: #777;
}

.students-table-wrap {
  overflow-x: auto;
  background: #fff;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(11, 22, 40, 0.06);
}

.students-table {
  width: 100%;
  border-collapse: collapse;
}

.students-table th,
.students-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(201, 162, 39, 0.12);
}

.students-table th {
  background: var(--paper);
  color: var(--navy);
  font-family: var(--serif);
}

.paid-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.paid-badge.paid {
  background: rgba(31, 122, 63, 0.12);
  color: #1f7a3f;
}

.paid-badge.unpaid {
  background: rgba(180, 35, 24, 0.1);
  color: #b42318;
}

.btn-ghost {
  background: transparent;
  border: 1px solid #ccc;
  color: var(--navy);
}

.btn-ghost:hover {
  background: var(--paper);
}

@media (max-width: 1100px) {
  .courses-grid {
    grid-template-columns: 1fr;
  }

  .courses-upload-panel {
    max-height: none;
  }
}

@media (max-width: 960px) {
  .classes-grid {
    grid-template-columns: 1fr;
  }

  .upload-panel {
    position: static;
  }

  .document-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .classes-page .classes-hero {
    padding-top: 84px;
  }
}