:root {
    --reaction-zoom: 150;
}

button.reaction {
    transition: transform 0.3s ease-in-out;
    transform: scale(1);
}

button.reaction:hover {
    transform: scale(calc((var(--reaction-zoom) + 60) / 100));
}

button.reaction img {
        transition: transform 0.3s ease-in-out;
        transform: scale(1);
    }
    
button.reaction:hover img {
    transform: scale(calc((var(--reaction-zoom) + 25) / 100));
}