.article-directory [hidden], .blog-section [hidden] { display: none !important; }
.article-directory-page .page-header { padding: 56px 0 18px; text-align: left; }
.article-directory-page .page-title { font-size: clamp(30px, 4vw, 40px); margin-bottom: 8px; }
.article-directory-page .page-subtitle { max-width: none; margin: 0; }
.article-directory-page .blog-section { padding-top: 22px; }
.article-directory-page .curated-blog-header { margin-top: 34px; }
.article-directory-page :is(.curated-blog-header, .student-work-header) h2 { color: var(--text-primary); }
.article-directory-page .curated-article-grid .blog-card-image { display: none; }
.article-directory-page .curated-article-grid .blog-card { border: 1px solid var(--border-primary); box-shadow: none; }
.article-directory { margin: 0 0 36px; padding: 22px; border: 1px solid var(--border-primary); border-radius: 12px; background: var(--bg-secondary); }
.article-directory-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; max-width: 660px; margin-bottom: 22px; }
.article-directory-tab { min-height: 72px; padding: 12px 18px; border: 1px solid var(--border-primary); border-radius: 8px; color: var(--text-primary); background: var(--bg-primary); font: inherit; font-weight: 750; text-align: left; cursor: pointer; }
.article-directory-tab span { display: block; margin-top: 4px; color: var(--text-secondary); font-size: 13px; font-weight: 400; }
.article-directory-tab.is-active { border-color: var(--primary-500); background: var(--bg-secondary); box-shadow: inset 0 3px var(--primary-500); }
.article-directory-tab:focus-visible, .article-directory-reset:focus-visible { outline: 2px solid var(--primary-500); outline-offset: 2px; }
.article-directory-filters { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; }
.article-directory-search { flex: 1 1 240px; }
.article-directory-search input { width: 100%; min-height: 44px; padding: 10px 14px; }
.article-directory-selects { display: flex; flex: 2 1 460px; flex-wrap: wrap; gap: 10px; }
.article-directory-selects label { flex: 1 1 140px; color: var(--text-secondary); font-size: 12px; }
.article-directory-selects select { width: 100%; min-height: 44px; margin-top: 5px; padding: 8px; }
.article-directory-reset { min-height: 44px; padding: 9px 14px; border: 1px solid var(--border-primary); border-radius: 7px; color: var(--text-primary); background: var(--bg-secondary); font: inherit; cursor: pointer; }
.article-directory-reset:hover { border-color: var(--primary-500); }
.article-directory-count { margin: 14px 0 0; color: var(--text-secondary); font-size: 14px; }
.article-directory-more { display: block; margin: 26px auto 0; }
.student-article-card { border: 1px solid var(--border-primary); box-shadow: none; }
.student-article-card .blog-title a { color: var(--text-primary); text-decoration: none; }
.student-article-card .blog-title a:hover { color: var(--primary-500); }
.article-problem-meta { display: flex; flex-wrap: wrap; gap: 7px; margin: 8px 0 14px; }
.article-problem-meta span { display: inline-flex; align-items: center; min-height: 25px; padding: 3px 7px; border: 1px solid var(--border-primary); border-radius: 5px; color: var(--text-secondary); font-size: 12px; line-height: 1.25; }
.article-problem-meta .article-code { color: var(--primary-500); font-weight: 750; }
.article-original-title { margin: -5px 0 13px; color: var(--text-tertiary); font-size: 12px; }
.article-directory .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 680px) {
  .blog-section { padding: 36px 0 60px; }
  .article-directory { padding: 14px; }
  .article-directory-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-directory-tab { padding: 11px; }
  .article-directory-selects { flex-basis: 100%; }
  .article-directory-selects label { flex: 1 1 45%; }
  .article-directory-reset { width: 100%; }
}