:root {
    --portal-primary: #0f4c81;
    --portal-primary-dark: #0a355a;
    --portal-accent: #f4a261;
    --portal-bg: #f7f9fc;
    --portal-surface: #ffffff;
    --portal-border: #dbe3ee;
    --portal-text: #1f2937;
    --portal-muted: #6b7280;
}

body.portal-body {
    background: var(--portal-bg);
    color: var(--portal-text);
    font-family: 'Inter', system-ui, sans-serif;
}

.portal-brand-title {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--portal-primary-dark);
    line-height: 1.1;
}

.portal-brand-kicker {
    display: block;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--portal-muted);
    margin-bottom: 0.25rem;
}

.portal-brand-subtitle {
    color: var(--portal-muted);
    font-size: 0.95rem;
}

.portal-nav .nav-link {
    color: var(--portal-text);
    font-weight: 500;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
}

.portal-nav .nav-link.active,
.portal-nav .nav-link:hover {
    color: var(--portal-primary);
    background: rgba(15, 76, 129, 0.08);
}

.portal-shell {
    max-width: 1180px;
}

.portal-card {
    background: var(--portal-surface);
    border: 1px solid var(--portal-border);
    border-radius: 1rem;
    padding: 1.25rem;
    box-shadow: 0 10px 30px rgba(15, 76, 129, 0.05);
}

.portal-card-accent {
    background: linear-gradient(180deg, #ffffff 0%, #f3f8fd 100%);
}

.portal-card-title {
    color: var(--portal-primary-dark);
    letter-spacing: 0.06em;
    margin-bottom: 1rem;
    font-weight: 700;
}

.portal-topic-list li + li,
.portal-link-list li + li {
    margin-top: 0.65rem;
}

.portal-topic-link,
.portal-link-item,
.portal-inline-link,
.portal-inline-link-light {
    text-decoration: none;
}

.portal-topic-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    color: var(--portal-text);
    padding: 0.55rem 0.75rem;
    border-radius: 0.75rem;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.portal-topic-link:hover,
.portal-link-item:hover {
    background: rgba(15, 76, 129, 0.06);
    color: var(--portal-primary);
}

.portal-link-item {
    display: block;
    color: var(--portal-text);
    line-height: 1.45;
    padding: 0.2rem 0;
}

.portal-inline-link {
    color: var(--portal-primary);
    font-weight: 600;
}

.portal-inline-link-light {
    color: #dbeafe;
    font-weight: 600;
}

.portal-hero {
    background: linear-gradient(135deg, #0f4c81 0%, #1d6fa5 100%);
    color: #fff;
    border-radius: 1.25rem;
    padding: 2rem;
    margin-bottom: 2rem;
}

.portal-hero h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.portal-article-card,
.portal-post-card {
    background: var(--portal-surface);
    border: 1px solid var(--portal-border);
    border-radius: 1rem;
    overflow: hidden;
    height: 100%;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.portal-article-card:hover,
.portal-post-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 30px rgba(15, 76, 129, 0.08);
}

.portal-post-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.portal-post-card .card-body {
    padding: 1.25rem;
}

.portal-post-title {
    font-family: 'Playfair Display', serif;
    color: var(--portal-primary-dark);
}

.portal-post-title a {
    color: inherit;
    text-decoration: none;
}

.portal-post-title a:hover {
    color: var(--portal-primary);
}

.portal-meta {
    color: var(--portal-muted);
    font-size: 0.9rem;
}

.portal-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(15, 76, 129, 0.08);
    color: var(--portal-primary);
    border-radius: 999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
}

.portal-chip:hover {
    background: rgba(15, 76, 129, 0.14);
    color: var(--portal-primary-dark);
}

.portal-breadcrumbs .breadcrumb-item a {
    color: var(--portal-primary);
    text-decoration: none;
}

.portal-breadcrumbs .breadcrumb-item.active {
    color: var(--portal-muted);
}

.portal-article-content {
    background: var(--portal-surface);
    border: 1px solid var(--portal-border);
    border-radius: 1rem;
    padding: 2rem;
}

.portal-related-grid .portal-post-card img {
    height: 160px;
}

.portal-footer {
    background: linear-gradient(160deg, #10243a 0%, #0b1728 100%);
}

.portal-footer-links a {
    color: #cbd5e1;
    text-decoration: none;
}

.portal-footer-links a:hover {
    color: #ffffff;
}

.portal-footer .portal-brand-title {
    color: #ffffff;
}

.portal-sidebar {
    top: 1.5rem;
}

@media (max-width: 991.98px) {
    .portal-header-cta {
        width: 100%;
    }

    .portal-nav {
        flex-wrap: wrap;
        gap: 0.35rem;
    }
}