/* ============================================
   PNTU Branding — Navy Secondary Accent
   Xanh lá #008751 (chủ đạo) + Xanh navy #1a5276 (phụ trợ)
   ============================================ */

:root {
    --pntu-navy: #1a5276;
    --pntu-navy-dark: #143d5c;
    --pntu-navy-light: #2e6da4;
    --pntu-green: #008751;
    --pntu-green-dark: #006d41;
    --pntu-green-soft: #dfeee7;
    --pntu-ink: #212529;
}

/* ---- FRONTEND: navy top strip on header ---- */
html body .main-header {
    border-top: 4px solid #1a5276 !important;
}

/* Secondary buttons / outlines — navy (distinct from green primary) */
html body .btn-secondary {
    background-color: #1a5276 !important;
    border-color: #1a5276 !important;
    color: #fff !important;
}

html body .btn-outline-secondary {
    color: #1a5276 !important;
    border-color: #1a5276 !important;
}

html body .btn-outline-secondary:hover {
    background-color: #1a5276 !important;
    color: #fff !important;
}

html body .btn-link {
    color: #1a5276 !important;
}

/* Text secondary (navy) */
html body .text-secondary {
    color: #1a5276 !important;
}

/* Badges secondary */
html body .badge-secondary {
    background-color: #1a5276 !important;
}

/* Article/section headings — navy underline for hierarchy */
.issue-toc-section-title {
    color: #1a5276 !important;
}

/* Masthead / info callout boxes — navy tint */
html body .alert-info {
    color: #143d5c !important;
    background-color: #e8f0f7 !important;
    border-color: #2e6da4 !important;
}

/* Editorial sidebar group labels — navy */
.app__nav .app__navGroup h2,
.app__navGroup .app__navGroupLabel {
    color: #1a5276 !important;
}