/* Library: one compact toolbar and quiet, scannable article rows. */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.doc-library-head { align-items: center; margin-bottom: 20px; }
.doc-library-head p { margin: 5px 0 0; font-size: var(--font-size-label); color: var(--muted); }
.doc-saved-toggle[aria-pressed='true'], .doc-filter-toggle.is-filtered { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-text); }
.doc-toolbar { display: grid; grid-template-columns: minmax(0, 1fr) 225px auto; gap: 10px; align-items: center; margin-bottom: 22px; }
.doc-toolbar > * { min-width: 0; }
.doc-toolbar .doc-search { min-height: 42px; margin: 0; border-radius: var(--button-radius); }
.doc-toolbar .doc-search input { padding-block: 9px; }
.doc-category-control { min-width: 0; }
.doc-category-control .select-trigger { min-height: 42px; padding: 9px 12px; }
.doc-category-control .system-select { min-width: 0; }
.doc-filter-toggle { min-height: 42px; }
#docFilterCount { display: inline-grid; place-items: center; min-width: 17px; height: 17px; padding: 0 3px; border-radius: 4px; background: var(--accent-soft); color: var(--accent-text); font-size: var(--font-size-caption); }
#docFilterCount[hidden], .doc-filter-panel[hidden] { display: none; }
.doc-filter-panel { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 16px; margin: -10px 0 22px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.doc-filter-panel .field { margin: 0; min-width: 0; }
.doc-results-caption { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 0 0 10px; font-size: var(--font-size-label); color: var(--muted); }
.doc-section { margin-bottom: 26px; }
.doc-section-head { justify-content: space-between; margin: 0; padding: 0 0 8px; border-bottom: 1px solid var(--border); }
.doc-section-head h3 { font-size: var(--font-size-action); font-weight: 600; }
.doc-section-head > span { font-size: var(--font-size-caption); color: var(--muted); }
.doc-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; }
.doc-card { display: grid; grid-template-columns: minmax(0, 1fr) auto 14px; align-items: center; gap: 12px; min-width: 0; padding: 14px 10px; border: 0; border-bottom: 1px solid var(--border); border-radius: 0; background: transparent; }
.doc-card:hover { background: var(--surface-2); }
.doc-card:focus-visible { outline-offset: -2px; }
.doc-card-body { gap: 4px; }
.doc-card-title { font-size: var(--font-size-body); font-weight: 500; line-height: 1.45; }
.doc-card-summary { display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; font-size: var(--font-size-label); color: var(--muted); }
.doc-row-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 5px; font-size: var(--font-size-caption); color: var(--muted); white-space: nowrap; }
.doc-row-marks { display: flex; align-items: center; gap: 5px; min-height: 14px; }
.doc-row-marks:empty { display: none; }
.doc-card > .icon { color: var(--faint); }
.doc-library .empty { display: flex; flex-direction: column; align-items: center; gap: 14px; padding-block: 40px; }
/* Reader: article first, extra navigation and related features second. */
.doc-page { max-width: 740px; }
.doc-topbar { margin-bottom: 12px; }
.doc-paper { padding: 24px; border-radius: var(--radius); box-shadow: none; }
.doc-reader-kicker { text-transform: none; letter-spacing: 0; font-weight: 500; color: var(--muted); }
.doc-page .doc-reader-title { font-size: var(--font-size-title); margin: 6px 0 10px; }
.doc-reader-summary { margin-bottom: 12px; }
.doc-reader-meta { gap: 8px 12px; font-size: var(--font-size-label); color: var(--muted); }
.doc-updated { color: var(--faint); }
.doc-reader-meta .doc-save-btn { margin-left: auto; }
.doc-reader-features { border-top: 1px solid var(--border); padding-top: 16px; margin-top: 24px; }
.doc-toc { display: block; border: 0; border-block: 1px solid var(--border); padding: 0; margin: 16px 0 20px; }
.doc-toc > summary { display: flex; align-items: center; justify-content: space-between; min-height: 40px; list-style: none; cursor: pointer; color: var(--muted); }
.doc-toc > summary::-webkit-details-marker { display: none; }
.doc-toc > summary::after { content: '+'; }
.doc-toc[open] > summary::after { content: '−'; }
.doc-toc > nav { display: grid; gap: 4px; padding: 0 0 12px; }
.doc-toc button { min-height: 32px; }
.doc-related { margin-top: 24px; padding-top: 16px; }
.doc-related h3 { text-transform: none; letter-spacing: 0; font-size: var(--font-size-section); }
.doc-pager { margin-top: 16px; }
@media (max-width: 600px) {
  .doc-toolbar { grid-template-columns: minmax(0, 1fr) auto; gap: 8px; margin-bottom: 20px; }
  .doc-toolbar .doc-search { grid-column: 1 / -1; }
  .doc-toolbar .doc-search, .doc-category-control .select-trigger, .doc-filter-toggle { min-height: 44px; }
  .doc-filter-panel { padding: 12px; }
  .doc-filter-panel .select-trigger { padding-inline: 9px; }
  .doc-card { gap: 9px; padding: 13px 2px; }
  .doc-card-title { font-size: var(--font-size-body); }
  .doc-card-summary { -webkit-line-clamp: 2; }
  .doc-paper { padding: 18px 16px; }
  .doc-reader-meta { gap: 8px; }
  .doc-updated { display: none; }
  .doc-toc > summary, .doc-toc button { min-height: 44px; }
}
@media (max-width: 360px) { .doc-filter-panel { grid-template-columns: minmax(0, 1fr); } }

.doc-reader-meta .doc-save-btn.on { background: var(--accent-soft); color: var(--accent-text); }

.doc-filter-panel .select-trigger, .doc-category-control .select-trigger { font-weight: 400; }