:root{--ink:#182f32;--muted:#546467;--paper:#f4f5f1;--line:#d5dcda;--green:#214c46;--lime:#dce99c;--gold:#d4ac53;--red:#984c44;--blue:#406b88}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.55}button,input,select,textarea{font:inherit}button,select,summary{cursor:pointer}button{border:1px solid #b9c5c0;border-radius:5px;background:white;color:var(--ink);padding:11px 17px;font-weight:600;min-height:44px}button:hover{background:#e9efe7}button:disabled{opacity:.55;cursor:not-allowed}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #b67717;outline-offset:4px}a{color:inherit}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:#133f38}.quiet{background:transparent;border-color:transparent}.eyebrow{font:700 12px/1.5 Arial,sans-serif;letter-spacing:1.9px;margin:0 0 12px}header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 5%;border-bottom:1px solid var(--line);background:#fafbf7}.brand{text-decoration:none;display:flex;align-items:center;gap:14px;font-size:15px;font-weight:750;letter-spacing:1.8px}.brand small{display:block;font-size:10px;letter-spacing:2px;margin-top:3px}.brandmark{display:grid;place-items:center;background:var(--ink);color:#eef1dc;width:43px;height:46px;font:26px Georgia;position:relative}.brandmark span{position:absolute;font-size:15px;right:5px;bottom:1px}.header-note{font-family:Georgia,serif;font-style:italic;color:var(--muted);font-size:15px}main{max-width:1400px;margin:auto;padding:0 5%}.opening{display:flex;justify-content:space-between;gap:30px;align-items:center;padding:36px 0 28px}.opening .eyebrow{color:var(--green)}h1{font-family:Georgia,serif;font-weight:400;font-size:clamp(30px,3.3vw,46px);line-height:1.12;letter-spacing:-1.1px;margin:0}.intro{font-size:16px;color:var(--muted);border-left:2px solid #b4c3b6;padding-left:22px}.case-file{display:grid;grid-template-columns:165px 1fr 215px;gap:28px;background:var(--ink);color:#fff;padding:27px 30px;border-radius:7px;position:relative}.case-label{border-right:1px solid #526467;display:flex;flex-direction:column;gap:8px;padding-right:20px;font-size:14px}.case-label .eyebrow{color:var(--lime);margin:0}.case-stamp{font-size:10px;letter-spacing:1px;border:1px solid #6d827b;align-self:flex-start;padding:4px 6px;margin-top:auto;color:#dce7d5}.claim-area .eyebrow{color:#bccdc8;margin-bottom:5px}.claim-area h2{font-family:Georgia,serif;font-size:27px;font-weight:400;line-height:1.25;margin:0 0 12px;max-width:650px}.claim-area 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.eyebrow{font-size:11px;color:var(--muted);margin-bottom:5px}.section-heading h2{font:400 29px/1.2 Georgia,serif;letter-spacing:-.5px;margin:0 0 8px}.section-heading p{color:var(--muted);margin:0;font-size:15px}.small-badge{font-size:10px;letter-spacing:1px;background:#e6eae3;padding:7px 10px;white-space:nowrap}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:23px}.source-card{--accent:#a8814c;background:#fff;border:1px solid var(--line);border-top:4px solid var(--accent);border-radius:4px;padding:21px;display:flex;flex-direction:column;position:relative;min-height:255px;box-shadow:0 3px 0 #e8ece6;transition:transform .15s,box-shadow .15s}.source-card:hover{transform:translateY(-3px);box-shadow:0 8px 18px #182f3210}.source-card:nth-child(2){--accent:#689186}.source-card:nth-child(3){--accent:#8c7991}.source-card:nth-child(4){--accent:#56768d}.source-card:nth-child(5){--accent:#ae905b}.source-card:nth-child(6){--accent:#758766}.card-top{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:12px}.doc-icon{display:grid;place-items:center;width:28px;height:33px;border:1px solid #c9d4ce;border-radius:2px;font-size:17px;color:var(--accent)}.card-num{margin-left:auto;font:14px monospace;color:#7c8d87}.source-card h3{font:400 23px/1.25 Georgia,serif;margin:17px 0 10px}.source-card p{font-size:14px;color:var(--muted);margin:0 0 18px}.card-bottom{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:auto;border-top:1px solid #e8ebe5;padding-top:13px}.card-status{font-size:12px;color:var(--muted)}.card-bottom button{padding:6px 10px;min-height:36px;font-size:13px;border:0;background:#eef2eb}.desk-footer{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:27px 0}.desk-footer p{font-size:14px;color:var(--muted);max-width:660px}.desk-footer strong{display:block;color:var(--ink)}.teacher{margin-top:26px;border:1px solid var(--line);border-radius:5px;background:#edf0e9}summary{padding:17px;font-weight:600;min-height:50px}.teacher>summary span{font-size:13px;color:var(--muted);font-weight:400;margin-left:16px}.teacher-content{padding:0 22px 22px}.teacher-actions{display:flex;gap:15px;align-items:end;flex-wrap:wrap}.teacher-content details{border-top:1px solid var(--line);margin-top:22px}.teacher-content details summary{padding-left:0}.check{display:flex;gap:10px;align-items:center;align-self:center}.check input{width:20px;height:20px}.config-editor{height:320px;font:13px/1.6 monospace}.teacher-content h4{margin-bottom:4px}footer{display:flex;justify-content:space-between;gap:20px;padding:26px 0;font-size:11px;color:var(--muted)}footer span:first-child{font-weight:bold;letter-spacing:1.4px}dialog{border:1px solid var(--line);border-radius:8px;width: min(850px,94vw);max-height:90vh;padding:0;color:var(--ink);background:#fcfdf9;box-shadow:0 30px 100px #102b3255}dialog::backdrop{background:#0b242ab3;backdrop-filter:blur(3px)}.dialog-top{position:sticky;top:0;background:#f0f3eb;display:flex;justify-content:space-between;align-items:center;padding:12px 27px;border-bottom:1px solid var(--line);z-index:2}.dialog-top .eyebrow{margin:0}.dialog-top button{border:0;background:transparent;font-size:20px;padding:5px 12px}.dialog-body{padding:26px 35px 35px}.dialog-body h2{font:34px/1.2 Georgia;margin:0 0 20px}dl{display:grid;grid-template-columns:1fr 1fr;gap:10px 25px;font-size:14px}dl div{border-bottom:1px solid 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span{min-width:0}.board-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;background-image:radial-gradient(#bfcac6 1px,transparent 1px);background-size:15px 15px;padding:10px 0}.board-column{border:1px dashed #aebfb4;border-radius:5px;padding:15px;min-height:300px;background:#f0f4eadb;position:relative}.board-column[data-group=challenges]{background:#f8efecde}.board-column[data-group=uncertain]{background:#eef1f5db}.board-column.drag-over{outline:3px solid var(--gold)}.board-column h3{font-size:12px;letter-spacing:1px;margin:0 0 13px}.board-column>p{font-size:13px;color:var(--muted)}.board-card{border:1px solid var(--line);background:#fff;padding:14px;margin:12px 0;border-radius:4px;box-shadow:0 2px 3px #182f3208}.board-card h4{font:19px/1.3 Georgia;margin:7px 0}.board-card>span{font-size:11px;color:var(--muted)}.board-card label{font-size:12px;margin:8px 0 0}.board-card select{font-size:13px;padding:6px;min-height:40px}.board-card button{font-size:12px;border:0;padding:5px 0;min-height:30px;background:transparent;text-decoration:underline}.unplaced{margin-top:25px}.unplaced>div{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.unplaced h3{font-size:16px}.notice{background:#e7ece0;padding:16px;border-left:3px solid #617b4a}.verdict-form{max-width:900px;background:white;padding:27px;border:1px solid var(--line);border-radius:5px}.verdict-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}.error{color:#983d2e}.feedback-card{background:#e9efdc;border:1px solid #b7c4a0;padding:26px;margin:25px 0;border-radius:5px}.feedback-card h2{font:28px Georgia;margin:0 0 10px}.feedback-card li{margin:13px 0}.feedback-card details{border-top:1px solid #b7c4a0}.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}[hidden]{display:none!important}@media(min-width:1500px){body{font-size:18px}.source-card p,.section-heading p{font-size:16px}}@media(max-width:1050px){.case-file{grid-template-columns:140px 1fr}.case-note{display:none}.header-note{display:none}.source-card{padding:17px}.cards{gap:16px}.steps{gap:15px}.small-badge{display:none}}@media(max-width:760px){header{padding:16px 5%}.brand{font-size:12px;letter-spacing:1px}.brand small{font-size:8px}.brandmark{width:35px;height:39px}.quiet{font-size:13px;padding:8px}.opening{padding-top:25px}.intro{display:none}.case-file{grid-template-columns:1fr;padding:22px;gap:15px}.case-label{flex-direction:row;border:0;padding:0;flex-wrap:wrap}.case-stamp{display:none}.claim-area h2{font-size:25px}.steps{gap:8px;margin:16px 0 25px}.steps button{font-size:12px}.steps button>span{display:block;margin:0 0 7px}.steps b{float:none;margin-left:5px}.cards{grid-template-columns:repeat(2,1fr)}.section-heading h2{font-size:25px}.source-card h3{font-size:21px}.desk-footer{align-items:flex-start;flex-direction:column;gap:5px}.board-columns{grid-template-columns:1fr}.board-column{min-height:160px}.unplaced>div{grid-template-columns:1fr 1fr}.verdict-choices{grid-template-columns:1fr 1fr}.two-col{grid-template-columns:1fr;gap:0}.dialog-body{padding:22px}.teacher>summary span{display:block;margin-left:18px}footer{flex-wrap:wrap}.verdict-form{padding:18px}}@media(max-width:460px){.cards{grid-template-columns:1fr}.source-card{min-height:220px}.brand small{display:none}.desktop{display:none}.unplaced>div{grid-template-columns:1fr}.verdict-choices{grid-template-columns:1fr}dl{grid-template-columns:1fr}.dialog-body h2{font-size:29px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media print{header button,.steps,.teacher,dialog,.desk-footer,footer{display:none!important}.view[hidden]{display:block!important}.cards{grid-template-columns:repeat(2,1fr)}.source-card,.board-card{break-inside:avoid}.case-file{color:#000;background:#fff}.case-label .eyebrow,.claim-area .eyebrow,.claim-area p:last-child{color:#333}}

/* Readable classroom text and generous touch targets. */
.source-card p{font-size:16px}.card-top{font-size:14px}.card-bottom button{font-size:14px;min-height:44px}.claim-area p:last-child{font-size:16px}.board-card button{min-height:44px;font-size:14px}.board-card label{font-size:14px}.board-column h3{font-size:14px}