.fade-in {
    animation: fadeIn 2s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.btn-animated {
    animation: scaleUp 1s ease-in-out infinite alternate;
}

@keyframes scaleUp {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.1);
    }
}

.btn-rotate {
    animation: rotate 1s linear;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}