@keyframes btnEnter {
    from {
        opacity: 60%;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 100%;
        transform: scale(1) translate(0px);
    }
}

.rsvp-btn {
    animation-name: btnEnter;
    animation-timing-function: ease-in-out;
    animation-duration: 1s;
}