h4 {
    margin-top: 25px;
}
.row {
    margin-bottom: 20px;
}
.row .row {
    margin-top: 10px;
    margin-bottom: 0;
}
[class*="col-"] {
    padding-top: 15px;
    padding-bottom: 15px;
    background-color: #fff;
    border: 1px solid #6c757d;;
}
hr {
    margin-top: 40px;
    margin-bottom: 40px;
}
.nav-link {
    color: #000;
}
.nav-tabs {
    border-color: #6c757d;
}
.nav-tabs .nav-item.show .nav-link, .nav-tabs .nav-link.active {
    border-color: #6c757d;
    background: #6c757d;
    color: #fff;
}
.nav-tabs .nav-link:focus, .nav-tabs .nav-link:hover {
    border-color: #6c757d;
}
hr {
    background: #6c757d;
    opacity: 1;
}
h2.display-6 {
    font-size: 2rem!important;
}