.slider1_logo_aniversario,
.slider2_logo_aniversario,
.slider3_logo_aniversario {
    position: absolute;
    top: 26%;
    left: 60%; /* Puts the left edge exactly in the middle */
    transform: translateX(-30%); /* Pulls the image back by half its own width */
    width: 20% !important; 
    height: auto !important; 
    object-fit: contain;
    z-index: 0;
}