:root {
    --animate-duration: 1s;
}

.animate__animated {
    animation-duration: var(--animate-duration);
    animation-fill-mode: both;
}

.animate__faster {
    animation-duration: calc(var(--animate-duration) / 2);
}

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

.animate__fadeIn {
    animation-name: fadeIn;
}

@keyframes fadeOut {
    0% { opacity: 1; }
    to { opacity: 0; }
}

.animate__fadeOut {
    animation-name: fadeOut;
}

@keyframes heartBeat {
    0% { transform: scale(1); }
    14% { transform: scale(1.3); }
    28% { transform: scale(1); }
    42% { transform: scale(1.3); }
    70% { transform: scale(1); }
}

.animate__heartBeat {
    animation-name: heartBeat;
    animation-duration: calc(var(--animate-duration) * 1.3);
    animation-timing-function: ease-in-out;
}