/* Mobile-first specific tweaks */
#hr-ja-app-container {
    max-width: 768px;
    margin: 0 auto;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}
.nav-btn.active {
    color: #2563eb; /* Tailwind blue-600 */
}
/* Mermaid container styling */
.mermaid {
    background: #fff;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    overflow-x: auto;
}