/** * Opti-Behavior A/B Test Anti-Flicker CSS * * Prevents visual flickering when variant changes are applied server-side. * The `opti-ab-loading` class is added to in wp_head and removed * by the tracker JS once initialization is complete (or after a 500ms timeout). * * @package opti-behavior * @since 1.3.0 */ /* Hide page content while A/B variant is being applied. */ .opti-ab-loading { opacity: 0 !important; } /* Smooth reveal transition once variant is ready. */ html:not(.opti-ab-loading) { transition: opacity 0.05s ease-in; }