.cta-btn{
    transition:all 0.3s ease;
    animation:pulse 1.8s infinite;
}
.cta-btn:hover{
    animation:none;
}
@keyframes pulse{
    0%{
        transform:scale(1);
        box-shadow:0 0 0 0 rgba(31,31,31,0.7);
    }

    70%{
        transform:scale(1.05);
        box-shadow:0 0 0 14px rgba(31,31,31,0);
    }

    100%{
        transform:scale(1);
        box-shadow:0 0 0 0 rgba(31,31,31,0);
    }