/* Ensure the master Books collection never leaks beneath non-collection views.
   Several legacy layout rules set #grid to display:grid, which can override
   the browser's default [hidden] styling unless we enforce it explicitly. */
#grid[hidden] {
  display: none !important;
}

body.books-explorer-open #grid,
body.books-calendar-open #grid {
  display: none !important;
}