body {
    background-color: #f5f7fa;
}
.navbar-brand {
    font-weight: 600;
}
pre {
    background-color: #1e1e1e;
    color: #d4d4d4;
    padding: 1rem;
    border-radius: 0.375rem;
}
.card {
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
code {
    color: #0d6efd;
}