.source-integrity{font:10px/1.7 var(--mono);color:var(--brand);padding:12px 0;border-bottom:1px solid var(--line);letter-spacing:.025em}
.source-viewer{margin:25px 0 35px;min-width:0;max-width:100%}
.source-citation{padding:20px 22px;border-left:2px solid var(--brand);background:var(--brand-soft);font:13px/1.7 var(--mono);margin-bottom:22px}
.source-citation>strong{font-size:11px;color:var(--brand);font-weight:400}
.source-citation>p{margin:10px 0;font-size:13px}
.source-link{display:inline-block;font:11px/1.7 var(--mono);margin:5px 20px 5px 0;overflow-wrap:anywhere}
.source-citation details{margin-top:15px;font-size:11px}
.source-citation details>summary{cursor:pointer}.source-citation code{font:10px/1.7 var(--mono);overflow-wrap:anywhere;display:block}
.provenance-path,.material-path{font:10px/1.7 var(--mono);overflow-wrap:anywhere;color:var(--mut);margin:8px 0}
.page-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;border-block:1px solid var(--line);padding:15px 0;margin:20px 0}
.page-toolbar select{flex:1;min-width:120px;max-width:60%;font:11px/1.6 var(--mono);width:100%;padding:12px}
.page-toolbar .btn{font-size:11px;padding:11px 12px}
.source-search-label{font:12px/1.7 var(--mono);display:block;margin:18px 0;color:var(--mut)}
.source-search-label input{display:block;width:100%;font:13px/1.5 var(--mono);border:1px solid var(--line);border-radius:0;background:#fff;margin-top:8px;padding:13px;color:var(--ink);min-width:0}
.page-search-results{max-height:250px;overflow:auto}.page-search-results .btn{display:block;text-align:left;justify-content:flex-start;width:100%;font-size:10px;margin-bottom:5px;white-space:normal}
.page-progress{font:11px/1.7 var(--mono);padding:10px 0;border-bottom:1px solid var(--line);color:var(--brand)}
.original-page{min-width:0;overflow:hidden}.snapshot-link{display:block}.slide-snapshot{display:block;max-width:100%;height:auto;margin:14px auto;border:1px solid var(--line);background:#fff}
.source-text-details{margin:20px 0;font-size:13px}.source-text-details summary{font:12px/1.6 var(--mono);cursor:pointer;color:var(--brand)}
.original-text{white-space:pre-wrap;overflow-wrap:anywhere;word-break:normal;max-width:100%;font:16px/1.75 var(--body);padding:20px 0;color:var(--ink)}
.original-text.code-source{font:12px/1.8 var(--mono);tab-size:2;background:#f0f2f5;padding:18px;overflow:auto}
.page-study-actions{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}.page-study-actions .btn{font-size:10px;padding:11px}
.source-hidden{padding:60px 25px;text-align:center;border:1px dashed var(--brand);background:var(--brand-soft)}.source-hidden h3{font-size:23px;color:var(--brand);margin-bottom:14px}.source-hidden p{font-size:18px;margin:0}
.page-recall{padding:24px 0;border-top:1px solid var(--line)}.page-recall h3{font-size:23px;margin-bottom:12px}.page-recall p{font-size:17px;line-height:1.6}
.material-filters{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.material-filters .btn{font-size:11px;padding:10px 12px}.material-filters .btn.active{color:var(--brand);border-color:var(--brand);background:var(--brand-soft)}
.source-group{margin:25px 0 35px}.source-group>h2{font-size:21px;margin-bottom:10px;border-bottom:1px solid var(--line);padding-bottom:15px}
.material-row{display:flex;justify-content:space-between;align-items:center;gap:30px;padding:20px 0;border-bottom:1px solid var(--line);min-width:0}
.material-row>div{min-width:0;flex:1}.material-row h3{font:15px/1.6 var(--mono);margin-bottom:8px}.material-row strong{font:14px/1.6 var(--mono)}.material-row .btn{flex-shrink:0}.material-row .muted{font-size:12px;margin-bottom:0}.material-row .source-link{flex-shrink:0;max-width:140px}
.source-ancillary{border-top:1px solid var(--line);margin-top:30px;padding-top:20px}.source-ancillary>details{border-bottom:1px solid var(--line);padding:18px 0}.source-ancillary summary{font:14px/1.6 var(--mono);color:var(--brand);cursor:pointer}.source-ancillary>details>p{font-size:16px;margin-top:16px}.source-ancillary ul{padding-left:20px;font-size:16px}.source-ancillary h2{font-size:23px;margin:12px 0}.source-ancillary h3{font-size:17px;margin-top:25px}
.audit-counts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;border-block:1px solid var(--line);padding:25px 0}.audit-counts>div{border-right:1px solid var(--line);display:flex;flex-direction:column;gap:8px}.audit-counts>div:last-child{border:0}.audit-counts strong{font:34px/1.2 var(--mono);font-weight:400;color:var(--brand)}.audit-counts span{font:11px/1.5 var(--mono);color:var(--mut)}
.source-error{padding:30px;border:1px solid var(--bad);color:var(--bad);font-size:17px}
.assessment-excerpt{padding:24px 0;border-bottom:1px solid var(--line)}.assessment-excerpt blockquote{border-left:2px solid var(--brand);padding:8px 20px;margin:16px 0;font:18px/1.7 var(--body);white-space:pre-wrap;overflow-wrap:anywhere}
.assessment-excerpt>summary{font:14px/1.7 var(--mono);cursor:pointer;color:var(--brand);overflow-wrap:anywhere}.assessment-excerpt .checkpoint-label{display:block;margin-top:22px}.study-plan .micro{white-space:normal;overflow-wrap:anywhere}.study-plan .checkpoint{margin-block:25px}.page-recall .checkpoint-label{display:block;margin-top:20px}.page-study-actions .btn:disabled{opacity:.45;cursor:not-allowed}
@media(min-width:801px){.module-pick{grid-template-columns:repeat(5,minmax(0,1fr))}}
.source-activity-frame{width:100%;height:650px;border:1px solid var(--line);background:#fff;margin:20px 0}.original-activity{margin:25px 0}.original-activity summary{color:var(--brand);font:13px/1.6 var(--mono);cursor:pointer}
#module-pick button.stub{display:flex;opacity:.65}
.reader:has(.source-viewer){grid-template-columns:205px minmax(0,1fr);gap:35px}.reader:has(.source-viewer) .reader-source{grid-column:2;border:0;border-top:1px solid var(--line);margin-top:0;padding:20px 0}.reader:has(.source-viewer) .lesson-article{max-width:none}
@media(max-width:800px){.reader:has(.source-viewer){grid-template-columns:1fr}.reader:has(.source-viewer) .reader-source{grid-column:1}.material-row{gap:16px}.material-row h3{font-size:13px}.audit-counts{grid-template-columns:1fr 1fr}.audit-counts>div:nth-child(2){border:0}}
@media(max-width:480px){.source-integrity{font-size:9px}.source-citation{padding:17px}.source-citation>p{font-size:11px}.page-toolbar{gap:9px}.page-toolbar select{max-width:100%;flex-basis:100%;order:3}.page-toolbar .btn{font-size:10px;flex:1}.material-row{align-items:flex-start;flex-direction:column;gap:12px}.material-row>.btn,.material-row>.source-link{align-self:flex-end}.material-filters .btn{font-size:9px;padding:9px}.source-group>h2{font-size:18px}.original-text{font-size:16px}.original-text.code-source{font-size:10px;padding:12px}.page-study-actions .btn{flex:1;font-size:9px}.page-progress{font-size:9px}.source-search-label input{font-size:12px}.app-header>nav{flex-wrap:wrap;gap:15px!important}.app-header>nav button{font-size:9px}.page-recall h3{font-size:21px}.audit-counts strong{font-size:28px}.source-activity-frame{height:580px}.module-pick{grid-template-columns:1fr 1fr}.module-pick button:last-child{border-top:1px solid var(--line)}
.source-citation .btn{font-size:11px;margin-top:10px;white-space:normal;max-width:100%}}
.paper-card .btn{margin:8px 10px 8px 0}.paper-history{margin-top:16px}.paper-history summary{cursor:pointer;font:12px/1.7 var(--mono)}.paper-history .btn{display:block}
.paper-status{margin:24px 0}.paper-status .checkpoint-label{display:block;font:13px/1.7 var(--mono);margin:16px 0}.paper-status input{display:block;margin-top:8px;padding:10px;width:180px;max-width:100%;font:16px var(--mono);border:1px solid var(--line);background:#fff;color:var(--ink)}.paper-status .btn{margin:8px 12px 8px 0}.paper-status .source-error{padding:12px;font-size:14px}
.paper-clock{display:block;font:38px/1.5 var(--mono);color:var(--brand);font-variant-numeric:tabular-nums;margin:16px 0}.paper-columns{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:30px;align-items:start}.paper-columns>section{min-width:0}.paper-writing{position:sticky;top:20px}.paper-writing .checkpoint-label{display:block;font:13px/1.7 var(--mono);margin:18px 0}.paper-answer{min-height:400px}.paper-answer:disabled{opacity:.65}.paper-original .original-text{font-size:14px}.paper-workspace h1{overflow-wrap:anywhere}
@media(max-width:900px){.paper-columns{grid-template-columns:1fr}.paper-writing{position:static}.paper-answer{min-height:280px}.paper-workspace .page-heading h1{font-size:30px}.paper-clock{font-size:32px}}
.paper-writing textarea.paper-answer{min-height:400px}
@media(max-width:900px){.paper-writing textarea.paper-answer{min-height:280px}}
/* A single starting point and a guided page reader. */
.getting-started-intro{padding:32px 0 10px;max-width:760px}.getting-started-intro h1{font:400 54px/1.05 var(--display);color:var(--brand);margin:0 0 12px}.getting-started-intro p{font:20px/1.6 var(--body);margin:0;max-width:670px;color:var(--mut)}
.start-guide>h2{font:18px/1.5 var(--mono);margin:0 0 18px}.start-next{border-left:3px solid var(--brand);background:var(--brand-soft);padding:24px 28px}.start-next .start-module{font:12px/1.5 var(--mono);color:var(--brand);margin:0 0 9px}.start-next h3{font:20px/1.5 var(--mono);margin:0 0 8px;overflow-wrap:anywhere}.start-next>p{font:18px/1.5 var(--body);margin:8px 0 18px}.start-next>.btn{font-size:13px;padding:14px 24px}.start-next>p.start-reassurance{font:14px/1.6 var(--body);color:var(--mut);margin:14px 0 0;max-width:690px}.start-explainer{border-block:1px solid var(--line);padding:18px 0;margin:22px 0}.start-explainer summary{font:14px/1.6 var(--mono);cursor:pointer;color:var(--brand)}.start-explainer ol{padding-left:25px;max-width:800px}.start-explainer li,.start-explainer p{font:17px/1.7 var(--body);margin:14px 0}.start-other{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.start-other>p{font:14px/1.5 var(--body);color:var(--mut);margin:0 12px 0 0}.start-other>.btn{font-size:11px}
.source-viewer>.page-heading{margin-bottom:18px}.source-viewer>.page-heading>.btn{margin-bottom:18px}.source-viewer>.page-heading h1{font:400 40px/1.15 var(--display);margin-bottom:14px;overflow-wrap:anywhere}.source-viewer .breadcrumb{margin:4px 0 10px}.source-citation>summary{cursor:pointer;font:12px/1.6 var(--mono);color:var(--brand)}.source-citation:not([open]){padding:12px 16px;background:transparent;border:1px solid var(--line);margin-bottom:18px}.page-step-guide{background:var(--brand-soft);border-left:2px solid var(--brand);padding:17px 20px;margin:20px 0}.page-steps{display:flex;gap:25px;list-style:none;padding:0;margin:0 0 10px;font:12px/1.6 var(--mono);color:var(--mut);flex-wrap:wrap}.page-steps .active{color:var(--brand);font-weight:bold}.page-step-guide .page-direction{font:18px/1.5 var(--body);margin:0}.page-recall>.recall-toggle,.recall-outcomes .btn{margin:12px 12px 0 0}.recall-outcomes{display:flex;flex-wrap:wrap}.page-recall .answer{max-width:900px}.page-recall .micro{max-width:800px}
@media(min-width:801px){.getting-started-intro+.subject-section{padding-top:18px}.subject-section{padding-top:18px;margin-bottom:22px}.start-guide{max-width:900px}}
@media(max-width:600px){.getting-started-intro{padding-top:25px}.getting-started-intro h1{font-size:43px}.getting-started-intro p{font-size:18px}.start-guide>h2{font-size:15px}.start-next{padding:20px 18px}.start-next h3{font-size:17px}.start-next>.btn{width:100%;font-size:12px}.start-next>p{font-size:17px}.start-other{align-items:stretch;flex-direction:column}.start-other>.btn{width:100%}.page-steps{gap:10px;font-size:10px}.page-step-guide{padding:15px}.page-step-guide .page-direction{font-size:17px}.source-viewer>.page-heading h1{font-size:32px}.source-citation>summary{font-size:10px}.recall-outcomes{flex-direction:column}.recall-outcomes>.btn{width:100%;margin-right:0}.source-integrity{font:11px/1.6 var(--body);letter-spacing:0}}
@media(max-width:480px){#subjects .module-pick button{min-height:62px;padding:10px 11px;font-size:10px;line-height:1.5}#subjects .module-pick button .module-code{margin-bottom:1px;font-size:9px}.getting-started-intro{padding:21px 0 3px}.getting-started-intro h1{font-size:39px}.getting-started-intro p{font-size:17px;line-height:1.5}.subject-section{padding-top:18px;margin-bottom:18px}.subject-section>h2{font-size:16px}.start-next{padding:18px 16px}.start-next h3{font-size:15px}.start-next>p{font-size:16px;margin-bottom:12px}.start-next>p.start-reassurance{font-size:13px}.start-guide>h2{margin-bottom:13px}}