/* Fond interactif MasterTech — grille révélée uniquement au pointeur.
   Ne pas forcer position:relative sur .site-header (sticky). */
.mt-ambient {
    --mt-ambient-cell: 48px;
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
    contain: paint;
}

/* Conteneur sans mosaïque permanente (fond = body noir). */
.mt-ambient__grid {
    display: none;
}

.mt-ambient__canvas {
    position: absolute;
    inset: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    opacity: 1;
    pointer-events: none;
}

.mt-ambient.is-static .mt-ambient__canvas {
    display: none;
}

.site main,
.site-footer {
    position: relative;
    z-index: 1;
}

@media (max-width: 767px), (hover: none), (pointer: coarse) {
    .mt-ambient__canvas {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .mt-ambient__canvas {
        display: none;
    }
}