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0 0;line-height:1.4}._moreFilters_12wse_465{border-top:1px solid color-mix(in srgb, var(--page-canvas-ink) 22%, transparent);grid-column:1/-1}._moreFilters_12wse_465>summary,._progressKey_12wse_471>summary{width:fit-content;min-height:44px;color:var(--page-accent-strong);cursor:pointer;font-size:var(--text-caption);align-items:center;font-weight:600;display:flex}._moreFilters_12wse_465>summary{color:var(--page-canvas-ink)}:is(._moreFilters_12wse_465>summary:focus-visible,._progressKey_12wse_471>summary:focus-visible){outline:3px solid var(--page-highlight);outline-offset:2px}._moreFilterGrid_12wse_492{gap:var(--space-3);padding-top:var(--space-1);grid-template-columns:repeat(4,minmax(150px,1fr));display:grid}._filterActions_12wse_499{align-items:center;gap:var(--space-3);grid-column:1/-1;display:flex}._filterActions_12wse_499 button,._filterActions_12wse_499 a{min-height:38px;padding:var(--space-2) var(--space-3)}._filterActions_12wse_499 button,._filterActions_12wse_499 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strong{color:var(--page-highlight)}._row_12wse_668{grid-template-columns:minmax(260px,1.5fr) minmax(205px,1fr) 175px}._rowHead_12wse_672{border-bottom:1px solid var(--pb-line);background:color-mix(in srgb, var(--page-canvas-ink) 8%, transparent);color:color-mix(in srgb, var(--page-canvas-ink) 82%, transparent);font-size:var(--text-caption);font-weight:var(--weight-medium);letter-spacing:normal;text-transform:none}._alphaLabel_12wse_682{margin-left:var(--space-2);padding:1px var(--space-1);border-radius:var(--radius-full);color:var(--page-accent-ink);border:1px solid;font-size:.54rem;font-weight:600;line-height:1.4;display:inline-flex}._learnerEvidence_12wse_696{min-width:0;color:color-mix(in srgb, var(--page-ink) 72%, transparent);font-size:var(--text-caption);flex-wrap:wrap;align-content:start;align-items:baseline;gap:2px 4px;line-height:1.4;display:flex}._learnerEvidence_12wse_696>strong{color:var(--page-ink);font-weight:var(--weight-medium)}._learnerEvidence_12wse_696 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var(--page-ink);background:var(--page-surface);color:var(--page-ink);cursor:pointer;font-size:var(--text-caption);justify-content:center;align-items:center;font-weight:600;display:inline-flex}._favoriteButton_12wse_742[data-saved=true]{background:var(--page-accent);color:var(--page-on-accent)}._favoriteButton_12wse_742:disabled{cursor:wait;opacity:.7}._favoriteButton_12wse_742:focus-visible{outline:3px solid var(--page-highlight);outline-offset:3px}._favoriteUnavailable_12wse_773{width:fit-content;margin-top:var(--space-3);color:color-mix(in srgb, var(--page-ink) 72%, transparent);font-size:.6rem;font-weight:600;display:block}._identity_12wse_728>h3{margin-top:var(--space-2);font-size:var(--text-secondary);margin-bottom:0}._previewHeading_12wse_788{width:100%}._previewTrigger_12wse_792{overscroll-behavior-inline:contain;width:100%;min-width:0;min-height:44px;color:inherit;cursor:pointer;font:inherit;text-align:left;background:0 0;border:0;align-content:center;padding:0;display:grid;overflow:auto hidden}:is(._previewTrigger_12wse_792:hover ._previewTitle_12wse_810,._previewTrigger_12wse_792:focus-visible ._previewTitle_12wse_810){color:var(--page-accent-strong);text-underline-offset:4px;text-decoration:underline}._previewTrigger_12wse_792:focus-visible{outline:3px solid var(--page-accent);outline-offset:4px}._previewMeta_12wse_822{align-items:center;gap:var(--space-1);width:fit-content;margin-bottom:var(--space-2);padding:3px var(--space-2);border-left:3px solid var(--page-accent);color:var(--page-accent-strong);font-size:var(--text-caption);letter-spacing:.04em;flex-wrap:wrap;font-weight:600;display:flex}._previewTitle_12wse_810{min-width:0;max-width:100%;font-family:Georgia,Times New Roman,ui-serif,serif;font-size:var(--text-body);font-weight:700;line-height:1.42}._previewTitle_12wse_810 .math-markup{white-space:normal;max-width:100%;overflow:visible}._previewTitle_12wse_810 .katex{font-size:1em}._previewTrigger_12wse_792:after{content:"View problem statement";margin-top:var(--space-1);color:color-mix(in srgb, var(--page-ink) 64%, transparent);font-size:.58rem;font-weight:600}._previewTrigger_12wse_792[data-statement=coming-soon]:after{content:"Statement coming soon"}._previewTrigger_12wse_792[data-statement=access-options]:after{content:"View access options"}._previewAvailable_12wse_872{cursor:default}._previewAvailable_12wse_872:after{content:none}._previewOpenButton_12wse_880{width:fit-content;min-height:44px;margin-top:var(--space-1);padding:var(--space-2) 0;color:color-mix(in srgb, var(--page-ink) 76%, transparent);cursor:pointer;font:inherit;text-align:left;background:0 0;border:0;font-size:.58rem;font-weight:600}._previewAvailable_12wse_872:focus-within ._previewTitle_12wse_810{color:var(--page-accent-strong);text-underline-offset:4px;text-decoration:underline}._previewOpenButton_12wse_880:focus-visible{outline:3px solid var(--page-accent);outline-offset:4px}._previewUnavailable_12wse_906{cursor:default}._previewUnavailable_12wse_906:after{content:"Availability not loaded"}._previewUnavailable_12wse_906:hover ._previewTitle_12wse_810{color:inherit;text-decoration:none}._tags_12wse_919{gap:var(--space-1);margin-top:var(--space-2);flex-wrap:wrap;display:flex}._tags_12wse_919 span{padding:2px var(--space-2);border:1px solid var(--pb-line);border-radius:var(--radius-sm);color:color-mix(in srgb, var(--page-ink) 78%, transparent);font-size:var(--text-caption);font-weight:var(--weight-regular);background:0 0}._privateTags_12wse_936{align-items:center;gap:var(--space-1);margin-top:var(--space-2);flex-wrap:wrap;font-size:.62rem;display:flex}._privateTags_12wse_936 strong{color:var(--page-accent-strong);margin-right:2px;font-weight:600}._privateTags_12wse_936 span{padding:3px var(--space-2);border:1px dashed color-mix(in srgb, var(--page-ink) 42%, transparent);overflow-wrap:anywhere;background:0 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button:focus-visible,._privateTagDialog_12wse_976 input:focus-visible,._privateTagDialog_12wse_976 select:focus-visible){outline:3px solid var(--page-highlight);outline-offset:3px}._privateTagDialog_12wse_976{background:var(--page-surface);width:min(680px,100vw - 24px);max-height:min(820px,100dvh - 24px);color:var(--page-ink);border:3px solid #050506;margin:auto;padding:clamp(18px,3vw,28px);overflow:auto;box-shadow:8px 8px #050506}._privateTagDialog_12wse_976::backdrop{background:#050506b8}._problemPreviewDialog_12wse_1027{background:var(--page-surface);width:min(780px,100vw - 24px);max-height:min(820px,100dvh - 24px);color:var(--page-ink);border:3px solid #050506;margin:auto;padding:clamp(20px,3vw,32px);overflow:auto;box-shadow:8px 8px #050506}._problemPreviewDialog_12wse_1027::backdrop{background:#050506b8}._problemPreviewDialog_12wse_1027>header>span{color:var(--page-accent-strong);font-size:var(--text-caption);font-weight:600}._problemPreviewDialog_12wse_1027>header h2{margin:var(--space-1) 0;font-family:var(--font-display);font-size:clamp(1.45rem,4vw,2.15rem)}._problemPreviewDialog_12wse_1027>header p{margin:0 0 var(--space-4);color:color-mix(in srgb, var(--page-ink) 68%, transparent);line-height:1.45}._problemPreviewContent_12wse_1061{gap:var(--space-4);min-width:0;display:grid}._problemPreviewMathTitle_12wse_1067{min-width:0;padding-bottom:var(--space-3);border-bottom:1px solid color-mix(in srgb, var(--page-ink) 24%, transparent);margin:0;font-family:Georgia,Times New Roman,ui-serif,serif;font-size:clamp(1.05rem,2.5vw,1.3rem);line-height:1.45}._problemPreviewMathTitle_12wse_1067 .math-markup{max-width:100%}._previewLoading_12wse_1081{gap:var(--space-3);display:grid}._previewSkeleton_12wse_1086{gap:var(--space-3);border:2px solid var(--page-ink);background:var(--page-surface);padding:clamp(16px,3vw,24px);display:grid}._previewSkeleton_12wse_1086 span{background:linear-gradient(90deg, color-mix(in srgb, var(--page-ink) 10%, var(--page-surface)), color-mix(in srgb, var(--page-ink) 20%, var(--page-surface)), color-mix(in srgb, var(--page-ink) 10%, var(--page-surface)));background-size:220% 100%;border-radius:2px;height:14px;animation:1.25s ease-in-out infinite _problem-preview-skeleton_12wse_1;display:block}._previewSkeleton_12wse_1086 span:first-child{width:44%}._previewSkeleton_12wse_1086 span:nth-child(2){width:94%}._previewSkeleton_12wse_1086 span:nth-child(3){width:82%}._previewSkeleton_12wse_1086 span:nth-child(4){width:63%}@keyframes _problem-preview-skeleton_12wse_1{0%{background-position:100% 0}to{background-position:-100% 0}}@media (prefers-reduced-motion:reduce){._previewSkeleton_12wse_1086 span{background-position:0 0;animation:none}}._problemPreviewContent_12wse_1061>.math-markup{border:2px solid var(--page-ink);background:var(--page-surface);color:var(--page-ink);padding:clamp(16px,3vw,24px);font-family:Georgia,Times New Roman,serif;font-size:clamp(.98rem,2vw,1.12rem);line-height:1.7}._problemPreviewContent_12wse_1061>p,._previewError_12wse_1152 p{margin:0;line-height:1.6}._previewError_12wse_1152{gap:var(--space-3);display:grid}._problemPreviewActions_12wse_1162,._previewError_12wse_1152{align-items:center}._problemPreviewActions_12wse_1162{gap:var(--space-3);padding-top:var(--space-1);border-top:1px solid color-mix(in srgb, var(--page-ink) 24%, transparent);flex-wrap:wrap;display:flex}._problemPreviewActions_12wse_1162 a,._problemPreviewActions_12wse_1162 button,._previewError_12wse_1152 button{min-height:44px;padding:var(--space-2) var(--space-3);border:2px solid var(--page-ink);background:var(--page-accent);color:var(--page-on-accent);cursor:pointer;font:inherit;font-size:var(--text-caption);justify-content:center;align-items:center;font-weight:600;display:inline-flex}._problemPreviewActions_12wse_1162 button{background:var(--page-surface);color:var(--page-ink)}:is(._problemPreviewActions_12wse_1162 a:focus-visible,._problemPreviewActions_12wse_1162 button:focus-visible,._previewError_12wse_1152 button:focus-visible){outline:3px solid var(--page-highlight);outline-offset:3px}._privateTagDialog_12wse_976>header>span{color:var(--page-accent-strong);font-size:var(--text-caption);font-weight:600}._privateTagDialog_12wse_976>header h2{margin:var(--space-1) 0;font-family:var(--font-display);font-size:clamp(1.45rem,4vw,2.1rem)}._privateTagDialog_12wse_976>header p{margin:0 0 var(--space-4);line-height:1.5}._privateTagDialog_12wse_976 form,._privateTagDialog_12wse_976 label{gap:var(--space-2);display:grid}._privateTagDialog_12wse_976 form{gap:var(--space-4)}._privateTagDialog_12wse_976 label>span,._privateTagEditorList_12wse_1232>strong{font-size:var(--text-caption);font-weight:600}._privateTagDialog_12wse_976 input,._privateTagDialog_12wse_976 select{width:100%;min-height:44px;padding:var(--space-2) var(--space-3);border:2px solid var(--page-ink);color:#111114;font:inherit;background:#fff}._privateTagDialog_12wse_976 form>p,._privateTagEditorList_12wse_1232 p{font-size:var(--text-caption);margin:0;line-height:1.45}._privateTagEditorList_12wse_1232{gap:var(--space-2);display:grid}._privateTagEditorList_12wse_1232 ul{gap:var(--space-2);margin:0;padding:0;list-style:none;display:grid}._privateTagEditorList_12wse_1232 li{justify-content:space-between;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-2);border:1px dashed var(--page-ink);display:flex}._privateTagEditorList_12wse_1232 li span{overflow-wrap:anywhere}._privateTagEditorList_12wse_1232 li button{background:var(--page-surface);color:var(--page-ink);flex:none}._privateTagDialogActions_12wse_1287{gap:var(--space-3);flex-wrap:wrap;display:flex}._privateTagDialogActions_12wse_1287 button:last-child{background:var(--page-surface);color:var(--page-ink)}._loadMoreRows_12wse_516{justify-content:center;align-items:center;gap:var(--space-3);min-height:56px;padding:var(--space-3) var(--space-4);border-top:1px solid var(--page-ink);flex-wrap:wrap;display:flex}._loadMoreRows_12wse_516 button{border:2px solid var(--page-on-highlight);background:var(--page-highlight);color:var(--page-on-highlight);font:inherit;font-size:var(--text-caption);font-weight:600}._loadMoreRows_12wse_516 button:focus-visible{outline:3px solid var(--page-highlight);outline-offset:3px}._loadMoreRows_12wse_516 button:disabled{cursor:default;opacity:.72}._loadMoreRows_12wse_516 span{color:var(--page-canvas-ink);font-size:var(--text-caption);font-weight:800}._pagination_12wse_517{align-items:center;gap:var(--space-3);margin-top:var(--space-4);flex-wrap:wrap;display:flex}._pageButtons_12wse_1342{align-items:center;gap:var(--space-2);flex-wrap:wrap;display:flex}._pageButtons_12wse_1342 button{min-width:44px;padding-inline:var(--space-3)}._pageButtons_12wse_1342 button[aria-current=page]:disabled{background:var(--page-highlight);color:var(--page-on-highlight);cursor:default;opacity:1}._pageEllipsis_12wse_1361{text-align:center;min-width:20px;color:var(--page-canvas-ink)}._pagination_12wse_517>span{color:var(--page-canvas-ink)}._pagination_12wse_517 span,._projectionNotice_12wse_1379,._nextPageFailure_12wse_518{font-size:var(--text-caption);font-weight:var(--weight-regular)}._libraryStatus_12wse_1385{align-items:baseline;gap:var(--space-1) var(--space-2);margin:var(--space-2) 0 0;padding:var(--space-2) 0;border-bottom:1px solid color-mix(in srgb, var(--page-canvas-ink) 24%, transparent);color:color-mix(in srgb, var(--page-canvas-ink) 76%, transparent);font-size:var(--text-caption);flex-wrap:wrap;line-height:1.45;display:flex}._libraryStatus_12wse_1385 strong{color:var(--page-highlight)}._libraryStatus_12wse_1385 a{color:var(--page-highlight);font-weight:600}._libraryStatus_12wse_1385 a,._projectionNotice_12wse_1379 a{padding-block:5px}._favoriteStatus_12wse_1415,._favoriteError_12wse_1416{margin:var(--space-3) 0;padding:var(--space-3) var(--space-3);border:2px solid var(--page-ink);background:var(--page-surface);color:var(--page-ink);font-size:var(--text-caption);font-weight:600}._favoriteError_12wse_1416{border-color:var(--page-accent-strong);box-shadow:inset 5px 0 0 var(--page-accent-strong)}._pagination_12wse_517 button:disabled{cursor:wait;opacity:.7}._projectionNotice_12wse_1379,._nextPageFailure_12wse_518{padding:var(--space-3) var(--space-3);border:1px solid var(--pb-line);border-radius:var(--radius-sm);background:var(--page-surface);color:var(--page-ink)}._estimateNotice_12wse_1445{font-size:var(--text-caption);text-transform:none;line-height:1.45}._estimateNotice_12wse_1445 strong{color:var(--page-accent-strong)}._nextPageFailure_12wse_518{align-items:center;gap:var(--space-3);margin-top:var(--space-3);flex-wrap:wrap;display:flex}._catalogAd_12wse_1463{align-items:center;gap:var(--space-4);margin-top:var(--space-5);padding:var(--space-4) var(--space-4);border:1px solid color-mix(in srgb, var(--page-on-ink) 42%, transparent);background:color-mix(in srgb, var(--page-ink) 92%, transparent);color:var(--page-on-ink);grid-template-columns:minmax(0,1fr) auto;display:grid}._catalogAdCopy_12wse_1484{min-width:0}._catalogAdMeta_12wse_1488{width:fit-content;margin-bottom:var(--space-1);padding:2px var(--space-2);color:color-mix(in srgb, var(--page-on-ink) 70%, transparent);border:1px solid;font-size:.58rem;font-weight:600;display:block}._catalogAd_12wse_1463 strong{font-family:var(--font-display);font-size:var(--text-subheading);line-height:1.2;display:block}._catalogAd_12wse_1463 p{max-width:840px;margin:var(--space-1) 0 0;color:color-mix(in srgb, var(--page-on-ink) 76%, transparent);font-family:Georgia,Times New Roman,serif;font-size:var(--text-caption)}._catalogAdAction_12wse_1514{min-height:44px;padding:var(--space-2) var(--space-3);border:1px solid var(--page-highlight);color:var(--page-on-ink);font-size:var(--text-caption);background:0 0;justify-content:center;align-items:center;font-weight:600;display:inline-flex}._catalogAdAction_12wse_1514:hover{background:var(--page-highlight);color:var(--page-on-highlight)}._catalogAdAction_12wse_1514:focus-visible{outline:3px solid var(--page-highlight);outline-offset:2px}@media (max-width:1260px){._controls_12wse_353{grid-template-columns:repeat(2,minmax(180px,1fr))}._searchField_12wse_364{grid-column:1/-1}._moreFilterGrid_12wse_492{grid-template-columns:repeat(3,minmax(150px,1fr))}._row_12wse_668{grid-template-columns:minmax(230px,1.35fr) minmax(190px,1fr) 155px}}@media (max-width:980px){._row_12wse_668{grid-template-columns:minmax(230px,1.3fr) minmax(190px,1fr) 150px}}@media (max-width:760px){._libraryHeader_12wse_241{align-items:flex-start;gap:var(--space-3);flex-direction:column}._libraryCount_12wse_304{min-width:0}._controls_12wse_353,._moreFilterGrid_12wse_492{grid-template-columns:1fr 1fr}._searchField_12wse_364{grid-column:1/-1}._row_12wse_668{grid-template-columns:1fr auto}._row_12wse_668>.problem-classification{grid-column:1/-1}._row_12wse_668>.mastery-status{grid-area:3/2}._learnerEvidence_12wse_696,._learnerEvidenceUnavailable_12wse_722{text-align:right;grid-area:3/2;justify-content:flex-end;justify-self:end}._learnerEvidence_12wse_696 .mastery-status{margin-inline-start:auto}._resultCount_12wse_644 a{min-height:44px}._resultsToolbar_12wse_584,._resultSort_12wse_596{flex-direction:column;align-items:stretch}._resultSort_12wse_596 select,._resultSort_12wse_596 button,._pageButtons_12wse_1342{width:100%}._nextPageFailure_12wse_518,._pagination_12wse_517{flex-direction:column;align-items:flex-start}._catalogAd_12wse_1463{grid-template-columns:1fr}._catalogAdAction_12wse_1514{width:fit-content}}@media (max-width:430px){._controls_12wse_353,._moreFilterGrid_12wse_492{grid-template-columns:1fr}._searchField_12wse_364{grid-column:auto}._areaSwitch_12wse_368>div{width:100%}._areaSwitch_12wse_368 label{flex:1 1 0;min-width:0}._problemPreviewActions_12wse_1162>*,._previewError_12wse_1152 button{width:100%}}@media (forced-colors:active){._favoriteButton_12wse_742,._favoriteStatus_12wse_1415,._favoriteError_12wse_1416,._privateTags_12wse_936 span,._privateTagActions_12wse_965 button,._privateTagDialog_12wse_976,._problemPreviewDialog_12wse_1027,._privateTagDialog_12wse_976 button,._privateTagDialog_12wse_976 input,._privateTagDialog_12wse_976 select,._problemPreviewDialog_12wse_1027,._problemPreviewDialog_12wse_1027 button,._problemPreviewDialog_12wse_1027 a{border-color:buttontext}._moreFilters_12wse_465>summary,._progressKey_12wse_471>summary,._libraryDisclosure_12wse_330>summary{color:linktext}._libraryDisclosure_12wse_330>summary:focus-visible{outline-color:highlight}._catalogAd_12wse_1463,._catalogAdMeta_12wse_1488,._catalogAdAction_12wse_1514{border-color:canvastext}._catalogAdAction_12wse_1514:focus-visible{outline-color:highlight}._favoriteButton_12wse_742[data-saved=true]{color:highlighttext;background:highlight}._privateTagDialog_12wse_976::backdrop{opacity:.75;background:canvas}._problemPreviewDialog_12wse_1027::backdrop{opacity:.75;background:canvas}}._loadingShapes_12wse_1736{color:var(--page-canvas-ink);padding-block:var(--space-3)}