.article-section-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; }
.article-section-nav a {
    display: flex; align-items: center; justify-content: center; min-height: 48px;
    padding: 12px 22px; border: 1px solid #cbd5cc; border-radius: 8px;
    color: #1e3a2b; background: #fff; text-decoration: none; font-size: 16px;
    font-weight: 750; line-height: 1.3; text-align: center;
}
.article-section-nav a.is-active { background: #1e3a2b; color: #fff; border-color: #1e3a2b; }
.article-section-nav a:hover:not(.is-active) { background: #e8efe4; }
.article-section-nav a:focus-visible { outline: 3px solid #648c5c; outline-offset: 3px; }
.article-page > .article-section-nav { margin: 0; }
.article-reader-footer { display: grid; gap: 18px; width: 100%; max-width: 860px; margin: 0 auto; padding: 24px 0; border-top: 1px solid #dce4d9; }
.article-reader-footer h2 { font-size: 24px; }
.article-reader-related { display: grid; gap: 10px; }
.article-reader-related a { color: #1e3a2b; font-size: 16px; line-height: 1.5; padding: 10px 0; text-decoration: underline; text-underline-offset: 3px; }
.article-reader-sources { max-width: 860px; width: 100%; margin: 0 auto; font-size: 14px; line-height: 1.5; }
.article-reader-sources summary { cursor: pointer; min-height: 44px; padding: 12px 0; font-weight: 700; }
.article-reader-sources a { display: block; padding: 10px 0; color: #1e3a2b; text-decoration: underline; }
@media (max-width: 768px) {
    .article-section-nav { display: grid; grid-template-columns: 1fr 1fr 1.3fr; gap: 6px; margin-top: 16px; }
    .article-section-nav a { padding: 10px 5px; min-width: 0; min-height: 48px; font-size: 14px; }
    .article-reader-footer h2 { font-size: 22px; }
    .article-page .article-back-link { display: inline-flex; align-items: center; min-height: 44px; margin-bottom: 10px; }
}