/* ===== Card Hover ===== */
.card-hover {
    transition: transform var(--transition-card), box-shadow var(--transition-card);
}

.card-hover:hover {
    transform: translateY(-4px);
}

/* ===== Fade In (Intersection Observer) ===== */
.fade-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* JS adds .fade-out to hide, then .visible to reveal with animation */
.fade-in.fade-out {
    opacity: 0;
    transform: translateY(20px);
}

.fade-in.fade-out.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered delays */
.fade-in:nth-child(1) { transition-delay: 0ms; }
.fade-in:nth-child(2) { transition-delay: 80ms; }
.fade-in:nth-child(3) { transition-delay: 160ms; }
.fade-in:nth-child(4) { transition-delay: 240ms; }
.fade-in:nth-child(5) { transition-delay: 320ms; }
.fade-in:nth-child(6) { transition-delay: 400ms; }

/* ===== Dark Card Variant ===== */
.card--dark {
    background-color: var(--color-dark);
    color: var(--color-white);
}

.card--dark .card__number,
.card--dark .card__title,
.card--dark .card__desc {
    color: var(--color-white);
}

/* ===== Image Overlay ===== */
.img-overlay {
    position: relative;
    overflow: hidden;
}

.img-overlay::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(30, 31, 34, 0.7) 0%,
        rgba(30, 31, 34, 0) 60%
    );
    transition: opacity var(--transition-card);
}

.img-overlay:hover::after {
    opacity: 0.8;
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    .fade-in {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .card-hover:hover {
        transform: none;
    }
}