/* Slower speed — 1s duration */
.fade-in-left,
.fade-in-right,
.fade-in-bottom,
.fade-in-top {
    opacity: 0;
    transition: opacity 1s ease, transform 1s ease;
}

.fade-in-left {
    transform: translateX(-50px);
}

.fade-in-right {
    transform: translateX(50px);
}

.fade-in-bottom {
    transform: translateY(40px);
}

.fade-in-top {
    transform: translateY(-40px);
}

    .fade-in-left.visible,
    .fade-in-right.visible,
    .fade-in-bottom.visible,
    .fade-in-top.visible {
        opacity: 1;
        transform: translate(0);
    }