.row {
    margin-left: 21rem !important;
}

.btn:hover {
    background-color: crimson;

}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

.btn {
    animation: pulse 2s infinite;
}