.carousel-item {
    position: relative;
}

.carousel-item::after {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    padding: 5px 10px;
    font-size: 14px;
    border-radius: 5px;
}