:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#e8ecf5;background:#0c1019;--muted:#96a2b8;--line:#283246;--panel:#151c29;--accent:#66e1c5}*{box-sizing:border-box}body{margin:0}button,a,input,textarea{touch-action:manipulation}button,input,textarea{font:inherit}button,a{transition:background .15s,border-color .15s}button{cursor:pointer;color:inherit;background:#1e293c;border:1px solid #374660;border-radius:9px;padding:10px 16px;min-height:44px}button:hover{background:#2a3953}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--accent);outline-offset:3px}button:disabled{opacity:.45;cursor:default}a{color:#a5c7ff;text-underline-offset:4px}header{height:88px;padding:0 32px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:32px;background:#111725}.brand{display:flex;align-items:center;gap:12px;font-weight:750;letter-spacing:1px}.mark{display:grid;place-items:center;width:43px;height:43px;color:#08271f;background:var(--accent);border-radius:12px;font-size:24px}.brand small{display:block;font-size:10px;color:var(--muted);margin-top:5px;letter-spacing:1.8px}.pill{border:1px solid var(--line);padding:8px 12px;border-radius:7px;font-size:13px;color:var(--muted)}.pill b{color:var(--accent);padding-left:10px}#progress{margin-left:auto;font-size:13px;color:var(--muted)}main{display:grid;grid-template-columns:224px minmax(0,1fr);max-width:1880px;margin:auto}aside{padding:28px 20px;border-right:1px solid var(--line)}.navHeading{display:flex;justify-content:space-between;font-size:13px}progress{height:5px;width:100%;accent-color:var(--accent);margin:16px 0}nav{display:grid;gap:7px}nav 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span{color:var(--muted);font-size:11px;margin-left:5px}textarea,input{width:100%;background:#101723;border:1px solid #35415a;border-radius:8px;color:inherit;padding:12px;resize:vertical}details{margin-top:16px;font-size:12px;color:var(--muted)}summary{cursor:pointer;padding:8px 0}.correctionGrid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:12px}.correctionGrid input{margin-top:8px}footer{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:20px 0}footer p{font-size:12px;color:var(--muted)}.primary{background:var(--accent);color:#08251e;border-color:var(--accent);font-weight:700}.primary:hover{background:#9af2dc}.gate{max-width:660px;margin:100px auto;padding:32px}.gate p{color:var(--muted)}[hidden]{display:none!important}dialog{color:inherit;background:var(--panel);border:1px solid #47536c;border-radius:14px;padding:26px;max-width:560px}dialog::backdrop{background:#03070cde}dialog p{color:var(--muted);font-size:14px}.dialogActions{display:flex;gap:10px;margin-top:24px}#zoom{width:96vw;max-width:96vw;height:94dvh;max-height:94dvh;padding:0}#zoom[open]{display:flex;flex-direction:column}.zoomToolbar{display:flex;justify-content:space-between;gap:8px;padding:12px;font-size:13px}.zoomToolbar button{padding:7px 12px}#zoomViewport{overflow:auto;flex:1;background:#101723;overscroll-behavior:contain;touch-action:pan-x pan-y pinch-zoom}#zoomImage{display:block;max-width:none;height:auto;width:100%}#zoomImage.z150{width:150%}#zoomImage.z200{width:200%}#zoomImage.z300{width:300%}#zoomImage.z400{width:400%}#problem{border:1px solid #e7b977;border-radius:8px;padding:16px;margin-top:16px;color:#f9d59e}#problem button{font-size:12px;margin:5px}
@media(min-width:1600px){.review{padding-left:46px;padding-right:46px}}@media(max-width:900px){header{padding:0 18px;gap:14px;height:76px}.pill{display:none}main{display:block}aside{padding:16px 18px;border-right:0;border-bottom:1px solid var(--line)}nav{display:flex;overflow-x:auto;padding-bottom:5px}nav button{flex:0 0 88px;display:block;text-align:center;padding:8px}nav small{display:block;margin-top:4px}.hint{display:none}.exports{flex-direction:row;margin-top:14px}progress{margin:12px 0}.review{padding:22px 18px}.levels{grid-template-columns:repeat(2,minmax(0,1fr))}.answerPanel{padding:18px}.choices{grid-template-columns:repeat(2,1fr)}footer{flex-direction:column;align-items:stretch}footer button{width:100%}.answerHeading{display:block}#saveState{display:block;margin-top:12px}h1{font-size:23px}.chartFooter{gap:12px}.chartFooter span{max-width:60%}.zoomToolbar{flex-wrap:wrap}#zoom{width:98vw;max-width:98vw}.dialogActions{flex-direction:column}.gate{margin:50px auto;padding:24px}#progress{max-width:140px;text-align:right;font-size:11px}}