/* ============================================
   INSTRUCTOR MODE STYLES
   ============================================ */

.instructor-page {
  padding-bottom: var(--spacing-2xl);
}

/* Tab Navigation */
.instructor-tabs {
  display: flex;
  gap: 4px;
  background: var(--color-bg);
  border-radius: 25px;
  padding: 3px;
  margin-bottom: var(--spacing-lg);
  width: fit-content;
}

.instructor-tab {
  padding: 8px 24px;
  border-radius: 22px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.instructor-tab.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(107,156,196,0.1);
}

.instructor-tab:hover:not(.active) {
  color: var(--color-primary);
}

.instructor-tab-content {
  display: none;
}

.instructor-tab-content.active {
  display: block;
}

/* Cards */
.instructor-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-card);
}

.instructor-card-title {
  font-family: var(--font-hand);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

/* API Key Section */
.api-key-form {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  flex-wrap: wrap;
}

.api-key-saved {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.api-key-status {
  font-size: 0.9rem;
  color: var(--color-success);
  font-weight: 600;
}

/* Form Elements */
.instructor-input {
  flex: 1;
  min-width: 200px;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s;
}

.instructor-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(192, 120, 90, 0.15);
}

.instructor-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  background: var(--color-bg);
  color: var(--color-text);
  resize: vertical;
  transition: border-color 0.2s;
}

.instructor-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(192, 120, 90, 0.15);
}

.instructor-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.2s;
}

.instructor-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.instructor-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
  margin-top: var(--spacing-md);
}

.instructor-label:first-of-type {
  margin-top: 0;
}

.instructor-hint {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-sm);
}

.instructor-empty {
  font-size: 0.9rem;
  color: var(--color-text-light);
  font-style: italic;
}

/* Generator Form */
.generator-form {
  display: flex;
  flex-direction: column;
}

.generator-form .btn-primary {
  margin-top: var(--spacing-lg);
  align-self: flex-start;
}

/* Small button variant */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md) !important;
  font-size: 0.85rem;
}

/* Loading State */
.generator-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-xl) 0;
  gap: var(--spacing-md);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-message {
  font-family: var(--font-hand);
  font-size: 1.2rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Error State */
.generator-error {
  background: #FFF0EE;
  border: 1px solid var(--color-pink);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.error-message {
  color: var(--color-pink);
  font-size: 0.9rem;
  flex: 1;
  min-width: 200px;
}

/* Publish button spinner */
.publish-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

/* Publish success banner */
.publish-success {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-lg);
  animation: publishReveal 0.5s ease forwards;
}

@keyframes publishReveal {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.publish-success-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-success);
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
}

.publish-success-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.publish-success-text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

/* Hidden utility */
.hidden {
  display: none !important;
}

/* Tutorial Preview */
.tutorial-preview {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-md);
}

.preview-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.preview-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.preview-meta {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
}

.preview-section {
  margin-bottom: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.6;
}

.preview-section strong {
  color: var(--color-primary);
}

.preview-section ul,
.preview-section ol {
  margin: var(--spacing-xs) 0 0 var(--spacing-lg);
}

.preview-section li {
  margin-bottom: var(--spacing-xs);
}

/* Refinement Section */
.refinement-section {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border-light);
}

.refinement-section .instructor-textarea {
  margin-top: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.refinement-section .btn-accent {
  background: var(--color-accent);
  color: white;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.refinement-section .btn-accent:hover {
  opacity: 0.85;
}

.refinement-section .btn-accent:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.revision-count {
  font-size: 0.8rem;
  color: var(--color-success);
  margin-top: var(--spacing-sm);
  font-weight: 600;
}

.preview-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border-light);
}

/* Generated Tutorials List */
.generated-tutorial-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.generated-tutorial-item:last-child {
  border-bottom: none;
}

.generated-tutorial-info {
  flex: 1;
  min-width: 200px;
}

.generated-tutorial-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: var(--spacing-xs);
}

.generated-tutorial-meta {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.generated-tutorial-actions {
  display: flex;
  gap: var(--spacing-xs);
}

/* Material Kit Grid */
.material-kit-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

@media (min-width: 480px) {
  .material-kit-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.material-kit-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
}

.material-kit-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 6px;
  flex-shrink: 0;
  mix-blend-mode: multiply;
}

.material-kit-name {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Instructor Mode Toggle in Header */
.instructor-toggle {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-light);
  cursor: pointer;
  transition: color 0.2s;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.instructor-toggle:hover {
  color: var(--color-primary);
}

.instructor-toggle-img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--color-border-light);
  transition: border-color 0.2s;
}

.instructor-toggle:hover .instructor-toggle-img {
  border-color: var(--color-primary);
}

/* Responsive */
@media (max-width: 480px) {
  .api-key-form {
    flex-direction: column;
  }

  .api-key-form .instructor-input {
    min-width: unset;
    width: 100%;
  }

  .material-kit-grid {
    grid-template-columns: 1fr;
  }

  .generated-tutorial-item {
    flex-direction: column;
    align-items: flex-start;
  }
}