:root {
  /* Override Material's "unchecked" icon with an empty ring for better affordance. */
  --md-tasklist-icon: url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12,20A8,8 0 0,1 4,12A8,8 0 0,1 12,4A8,8 0 0,1 20,12A8,8 0 0,1 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10,10 0 0,0 12,2Z"/></svg>');
}

/* Increase contrast: unchecked task list boxes were effectively invisible in light mode. */
.md-typeset .task-list-indicator:before {
  background-color: var(--md-default-fg-color);
}