.book-btn {
    animation: pulsate 1s infinite;
    transform: scale(1);
    padding: 2rem;
    background-color:rgb(55, 53, 53);
    border-radius: 4rem;
    width: 12em;
    height: 3em;
    color: white;

    font-size: large;
    cursor: pointer;
}

@keyframes pulsate {
    0% {
        transform: scale(1);  
    }
    
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}