.drop-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
  background: var(--bg-card);
  margin-bottom: var(--space-lg);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

@media (max-width: 560px) {
  .drop-zone { padding: 28px 16px; }
  .library-view-toggle { overflow-x: auto; padding-bottom: 3px; }
  .library-view-toggle .btn { flex: 0 0 auto; }
  .library-grid { grid-template-columns: 1fr; }
  .pdf-card { align-items: flex-start; text-align: left; padding-right: 44px; }
}

.drop-zone-active {
  border-color: var(--accent);
  background: var(--bg-secondary);
}

.drop-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: var(--space-sm);
}

.drop-text {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

#upload-status {
  margin-bottom: var(--space-md);
}

.status-info { color: var(--text-secondary); }
.status-success { color: var(--success); }
.status-error { color: var(--danger); }

.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
}

.pdf-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-sm);
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.pdf-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.pdf-card-icon {
  font-size: 2.5rem;
}

.pdf-card-info {
  width: 100%;
}

.pdf-card-name {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.pdf-card-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.pdf-card-delete {
  position: absolute;
  top: 8px;
  right: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.pdf-card-delete:hover {
  opacity: 1;
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-xl);
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--space-sm);
}
.library-view-toggle {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.library-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.library-toolbar .notes-search-input { max-width: 360px; margin: 0; }
.library-toolbar .library-view-toggle { margin: 0; }

@media (max-width: 560px) {
  .library-toolbar { align-items: stretch; flex-direction: column; }
  .library-toolbar .notes-search-input { max-width: none; }
}

.library-view-toggle .btn.active-view {
  background: var(--accent);
  color: white;
}

.bookmarks-list {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.bookmark-folder-title {
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
}

.bookmark-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.bookmark-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
}

.bookmark-item:hover {
  border-color: var(--accent);
}

.bookmark-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.bookmark-item-info {
  flex: 1;
}

.bookmark-item-label {
  font-weight: 600;
  font-size: 0.9rem;
}

.bookmark-item-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.bookmark-delete-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  opacity: 0.5;
}

.bookmark-delete-btn:hover {
  opacity: 1;
}