html, body {
    height: 100%;
    margin: 0;
}

h2 {
    text-align: center;
}

h3 {
    text-align: center;
}

h4 {
    text-align: center;
}

p {
    text-align: center;
}

.btn-custom {
    border: none;
    border-radius: 50%;
    color: #FDFEFE;
    font-size: 20px;
    height: 50px;
    text-align: center;
    width: 50px;
}

.btn-small-custom {
    border: none;
    border-radius: 50%;
    height: 20px;
    width: 20px;
}

.btn-check-empty {
    background-color: #2C3E50
}

a {
    color: #17202A;
}

    a:active, a:hover, a:visited, a:focus {
        color: #17202a;
        outline: none;
    }

@media screen and (max-width: 600px) {
    div.btn-group.group-phone {
        justify-content: flex-start !important;
        flex-wrap: wrap;
    }
}