body { background: #0b0f14; }
.card { border-radius: 12px; }
code { color: #ffc107; }
a { text-decoration: none; }
.navbar-brand { letter-spacing: 1px; }
input.form-control, .form-control {
    background: #11161d;
    border-color: #2a323c;
    color: #e9ecef;
}
input.form-control:focus, .form-control:focus {
    background: #11161d;
    color: #fff;
    border-color: #ffc107;
    box-shadow: 0 0 0 .2rem rgba(255,193,7,.15);
}