/* Object – Shared surface base (background, border, radius) */

.tool-card,
.tool-panel,
.tool-preview,
.empty-state {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Hover accent border – interactive surfaces that highlight on focus/drag */
.tool-card:hover,
.btn:hover:not(:disabled),
.load-area:hover,
.load-area.drag-over,
.tool-preview.drag-over {
  border-color: var(--accent-dim);
}