[data-bs-theme="light"] .carousel-caption{
    background: rgba(0, 0, 0, 0.7);
}
[data-bs-theme="dark"] .carousel-caption{
    background: rgba(255, 255, 255, 0.7);
}

.pillars div {
    text-align: center;
}
.pillars i {
    font-size: 8rem;
    color: royalblue;
}