.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}
.upload-icon { font-size: 2.5rem; margin-bottom: 0.5rem; }
.upload-zone p { margin: 0.25rem 0; color: var(--text-secondary); font-size: 0.9rem; }

.pages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.page-card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s;
  position: relative;
}
.page-card.selected { border-color: var(--color-primary); }
.page-card canvas {
  width: 100%; aspect-ratio: 3/4; display: block;
  border-radius: 4px; background: #fff;
}
.page-card .page-label {
  font-size: 0.7rem; color: var(--text-muted); font-weight: 600;
  margin-top: 0.35rem;
}
.page-card .check-badge {
  position: absolute; top: 6px; right: 6px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--color-primary); color: #fff;
  font-size: 0.65rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.15s;
}
.page-card.selected .check-badge { opacity: 1; }

.select-row {
  display: flex; gap: 0.5rem; margin-bottom: 0.75rem; flex-wrap: wrap; align-items: center;
}
.actions-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.5rem; align-items: center; }
.status-msg { font-size: 0.85rem; color: var(--text-muted); }

.progress-bar-wrap { height: 6px; background: var(--bg-secondary); border-radius: 3px; margin-bottom: 1rem; overflow: hidden; display: none; }
.progress-bar { height: 100%; background: var(--color-primary); border-radius: 3px; width: 0; transition: width 0.2s; }

.loading-overlay {
  display: flex; align-items: center; justify-content: center; gap: 0.75rem;
  padding: 2rem; color: var(--text-muted); font-size: 0.9rem;
}
.spinner {
  width: 24px; height: 24px; border: 3px solid var(--border-color);
  border-top-color: var(--color-primary); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }