body {
    background-color: #00dafe;
    height: 100vh;
}

.btn-primary {
    display: table;
    margin: 0 auto;
    background-color: transparent;
    border: 2px solid #fff;
    color: #fff;
    transition: 0.3s ease all;
    font-size: 2rem;
    font-weight: bold;
}

    .btn-primary:hover {
        background-color: #fff;
        transition: 0.3s ease all;
        color: #0065f3;
        border: 2px solid #fff;
    }


    .btn-primary:active, .btn-primary:focus {
        background-color: #fff !important;
        border: 3px solid #fff !important;
        transition: 0.3s ease all;
        box-shadow: 0 0 0 .2rem rgba(255,255,255,.5);
        color: #0065f3;
    }