.fade-in {
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.fade-in.visible {
    opacity: 1;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
}

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

.fade-in-down {
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
}

.fade-in-scale.visible {
    opacity: 1;
    transform: scale(1);
}