.text-center {
    text-align: center;
}
.center-button {
    display: inline-block;
}

.item {
    position: relative;
    overflow: hidden; /* Ensure the overlay stays within the item */
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5); /* Adjust the opacity to control the darkness */
    z-index: 1; /* Make sure the overlay is above the content */
}

.de_testi {
    position: relative;
    z-index: 2; /* Ensure the content is above the overlay */
    padding: 20px;
    color: white; /* Change the text color to white for visibility against the dark overlay */
}