/* Study Materials Page Styles */

/* Study Materials Container */
.study-materials-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Page Header */
.study-materials-container .page-header {
  text-align: center;
  margin-bottom: 3rem;
}

.study-materials-container .page-header h1 {
  font-size: 2.5rem;
  color: white;
  margin-bottom: 1rem;
}

.study-materials-container .page-header p {
  font-size: 1.1rem;
  color: white;
  max-width: 600px;
  margin: 0 auto;
}

/* Materials Navigation */
.materials-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.material-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.material-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.material-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* Materials Controls */
.materials-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.materials-controls .search-box {
  position: relative;
  flex: 1;
  max-width: 400px;
}

.materials-controls .search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}

.materials-controls .search-box input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  background: var(--bg-primary);
}

.filter-controls {
  display: flex;
  gap: 0.5rem;
}

.filter-controls select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  background: var(--bg-primary);
  min-width: 120px;
}

/* Materials Content */
.materials-content {
  display: none;
}

.materials-content.active {
  display: block;
}

/* Materials Grid */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

/* Material Card */
.material-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.material-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.material-cover {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.material-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.material-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  color: white;
}

.material-info {
  padding: 1.5rem;
}

.material-info h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.material-info p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.material-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.material-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.material-actions {
  padding: 0 1.5rem 1.5rem;
  display: flex;
  gap: 0.75rem;
}

.material-actions .btn {
  flex: 1;
}

/* Material Viewer Modal */
.material-viewer-content {
  max-width: 95vw;
  max-height: 95vh;
  width: 1200px;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
}

.material-viewer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
}

.material-info h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.material-info p {
  color: var(--text-secondary);
}

.viewer-controls {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.material-viewer-body {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.viewer-content {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
}

.viewer-content.active {
  display: block;
}

/* PDF Viewer */
.pdf-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
}

.pdf-navigation {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.page-info input {
  width: 60px;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  text-align: center;
}

.pdf-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pdf-tools select {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.85rem;
}

.pdf-container {
  height: calc(100% - 60px);
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: var(--bg-tertiary);
}

#pdf-canvas {
  max-width: 100%;
  height: auto;
  box-shadow: var(--shadow);
}

.pdf-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-secondary);
}

.pdf-loading i {
  font-size: 2rem;
  margin-bottom: 1rem;
}

/* Audio Viewer */
.audio-player-container {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 2rem;
}

.audio-header {
  text-align: center;
  margin-bottom: 2rem;
}

.audio-header h4 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.audio-info {
  display: flex;
  justify-content: center;
  gap: 2rem;
  color: var(--text-secondary);
}

.audio-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.audio-controls .btn-primary {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.audio-progress {
  width: 100%;
  max-width: 500px;
}

.progress-bar {
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.1s ease;
}

.time-display {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.audio-tools {
  display: flex;
  gap: 0.5rem;
}

/* Video Viewer */
.video-player-container {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 2rem;
}

.video-player {
  width: 100%;
  max-height: 70vh;
  background: black;
  border-radius: var(--border-radius);
}

.video-info {
  text-align: center;
  margin-top: 1rem;
}

.video-info h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.video-meta {
  display: flex;
  justify-content: center;
  gap: 2rem;
  color: var(--text-secondary);
}

/* Text Viewer */
.text-content-container {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.text-toolbar {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
}

.text-tools {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.text-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  background: var(--bg-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
  .study-materials-container {
    padding: 1rem 0.5rem;
  }
  
  .materials-nav {
    gap: 0.5rem;
  }
  
  .material-tab {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }
  
  .materials-controls {
    flex-direction: column;
    align-items: stretch;
  }
  
  .materials-controls .search-box {
    max-width: none;
  }
  
  .filter-controls {
    justify-content: center;
  }
  
  .materials-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .material-viewer-content {
    max-width: 100vw;
    max-height: 100vh;
    width: 100vw;
    height: 100vh;
    border-radius: 0;
  }
  
  .material-viewer-header {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }
  
  .viewer-controls {
    justify-content: center;
  }
  
  .pdf-toolbar {
    flex-direction: column;
    gap: 1rem;
  }
  
  .audio-info,
  .video-meta {
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .study-materials-container .page-header h1 {
    font-size: 2rem;
  }
  
  .material-card {
    margin: 0 -0.5rem;
    border-radius: 0;
  }
  
  .material-actions {
    flex-direction: column;
  }
  
  .pdf-tools {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .audio-controls .btn-primary {
    width: 50px;
    height: 50px;
  }
}