/* Nefty — Fix visibilidad thumbnails FLUX oscuros en tarjetas de curso EduMall */
.ns-course-card .ns-thumb,
.tutor-course-listing .tutor-course .tutor-course-thumbnail,
.grid-item.courses .course-thumbnail,
.edu-course-grid .edu-course .edu-course-thumbnail {
    position: relative;
}
/* agregar un gradient overlay sutil que levanta las sombras sin tapar */
.ns-course-card .ns-thumb::after,
.tutor-course-thumbnail::after,
.grid-item.courses .course-thumbnail::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,.08) 0%, transparent 50%, rgba(0,0,0,.25) 100%);
    pointer-events: none;
    border-radius: inherit;
}
/* si la imagen no carga, mostrar un placeholder Nefty en lugar de gris */
.ns-course-card .ns-thumb,
.tutor-course-thumbnail,
.grid-item.courses .course-thumbnail {
    background: linear-gradient(135deg, #1D1D1B, #B51D17) !important;
    background-size: cover !important;
}