/* components/_dataset-drop.css
   The overlay shown across the viewer while files are dragged over the page
   (ui/modules/dataset-drop.js). It never takes pointer events: the document
   owns the drag, so the overlay cannot swallow a drop. */

.dataset-drop-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-tooltip);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: var(--color-surface-overlay);
  backdrop-filter: blur(2px);
  pointer-events: none;
  animation: dataset-drop-in var(--duration-fast) var(--easing-out);
}

.dataset-drop-overlay[hidden] {
  display: none;
}

/* The frame marks the whole viewer as the target; the card says what to drop. */
.dataset-drop-overlay::before {
  content: '';
  position: absolute;
  inset: var(--space-4);
  border: var(--border-width-2) dashed var(--color-accent-strong);
  border-radius: var(--radius-sm);
}

.dataset-drop-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  max-width: 360px;
  padding: var(--space-6) var(--space-8);
  text-align: center;
  background: var(--color-surface-elevated);
  border: var(--border-default);
  box-shadow: var(--shadow-lg);
  color: var(--color-text-primary);
}

.dataset-drop-icon {
  color: var(--color-accent-text);
}

.dataset-drop-title {
  margin: 0;
  font-size: var(--type-title);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-tight);
}

.dataset-drop-hint {
  margin: 0;
  font-size: var(--type-body);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

@keyframes dataset-drop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .dataset-drop-overlay {
    animation: none;
  }
}