.unit-page[data-astro-cid-25radd4s]{color-scheme:light;max-width:1200px;margin:0 auto;padding:clamp(2rem,6vw,3.5rem) clamp(1.25rem,4vw,1.5rem) 5rem}.back-link[data-astro-cid-25radd4s]{display:inline-block;font-family:var(--font-mono);font-size:.78rem;letter-spacing:.05em;color:var(--ink-muted);text-decoration:none;margin-bottom:1.5rem}.back-link[data-astro-cid-25radd4s]:hover{color:var(--ink)}.unit-meta[data-astro-cid-25radd4s]{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1.5rem}.eyebrow[data-astro-cid-25radd4s]{display:flex;align-items:center;gap:.55rem;font-family:var(--font-mono);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-muted);margin:0}.eyebrow-dot[data-astro-cid-25radd4s]{width:.5rem;height:.5rem;border-radius:50%;background:var(--stamp-progress);flex-shrink:0}#gj-app{--blue:#2c4f74;--pink:#466461;--ink:#1a1c1e;--muted:#43474e;--bg:#f4f3f7;--card:#ffffff;--line:#c3c6cf;--code-bg:#10385c;--code-fg:#eeedf1;--green:#466461;--amber:#e3d1ac;--radius:12px;--shadow:0 8px 24px rgba(0,80,120,.1);--font:"Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;--mono:"Consolas","SF Mono",Monaco,"Courier New",monospace;all:initial;display:block;width:100%;box-sizing:border-box;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.55;padding:16px;border-radius:16px;-webkit-font-smoothing:antialiased}#gj-app *{box-sizing:border-box}#gj-app h1,#gj-app h2,#gj-app h3,#gj-app h4,#gj-app p{margin:0 0 .5em}#gj-app strong{color:var(--ink)}#gj-app :focus-visible{outline:3px solid var(--pink);outline-offset:2px;border-radius:8px}#gj-app .hero{background:linear-gradient(120deg,var(--blue),var(--pink));color:#fff;border-radius:var(--radius);padding:22px 22px 20px;box-shadow:var(--shadow);position:relative;overflow:hidden}#gj-app .hero:after{content:"A.B + C = 1";position:absolute;right:-6px;bottom:-14px;font-family:var(--mono);font-size:60px;font-weight:700;color:#ffffff1f;letter-spacing:-3px;white-space:nowrap}#gj-app .hero .kicker{font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;opacity:.9}#gj-app .hero h1{font-size:34px;font-weight:800;line-height:1.05;margin:.15em 0}#gj-app .hero p{max-width:640px;position:relative;z-index:1}#gj-app .teacher{display:inline-flex;align-items:center;gap:8px;margin-top:8px;background:#ffffff2e;padding:6px 12px;border-radius:999px;font-weight:700;font-size:14px}#gj-app .tabs{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}#gj-app .tab{appearance:none;cursor:pointer;border:2px solid var(--line);background:var(--card);color:var(--ink);font-family:var(--font);font-weight:700;font-size:14px;padding:9px 14px;border-radius:999px;min-height:44px;transition:transform .12s ease,background .12s ease,color .12s ease,border-color .12s ease}#gj-app .tab:hover{border-color:var(--pink);transform:translateY(-1px)}#gj-app .tab:active{transform:scale(.97)}#gj-app .tab[aria-selected=true]{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 6px 14px #2c4f7459}#gj-app .panel{display:none;animation:gj-fade .25s ease}#gj-app .panel.active{display:block}@keyframes gj-fade{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}#gj-app .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);margin:14px 0}#gj-app .card h2{font-size:20px;color:var(--blue);display:flex;align-items:center;gap:8px;flex-wrap:wrap}#gj-app .card h3{font-size:16px;color:var(--ink);margin-top:.9em}#gj-app .tag{display:inline-block;background:var(--pink);color:#fff;font-weight:700;font-size:11px;letter-spacing:.5px;text-transform:uppercase;padding:3px 9px;border-radius:999px;vertical-align:middle}#gj-app .grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px}@media(max-width:640px){#gj-app .grid2{grid-template-columns:minmax(0,1fr)}#gj-app .hero h1{font-size:26px}}#gj-app ul.gj,#gj-app ol.gj{padding:0 0 0 1.3em;margin:.3em 0}#gj-app ul.gj li,#gj-app ol.gj li{padding:3px 0}#gj-app ul.gj li::marker{color:var(--pink)}#gj-app ol.gj li::marker{color:var(--blue);font-weight:800}#gj-app .keyterm{border-left:5px solid var(--pink);background:#eef4f2;padding:10px 14px;border-radius:8px;margin:12px 0}#gj-app .keyterm b{color:var(--pink)}#gj-app .tip{border-left:5px solid #8a5a9e;background:#f6eff8;padding:10px 14px;border-radius:8px;margin:12px 0}#gj-app .tip b{color:#6d3f80}#gj-app .disc{border-left:5px solid #b4561f;background:#fcf2ea;padding:10px 14px;border-radius:8px;margin:12px 0}#gj-app .disc>b:first-child{color:#93441a}#gj-app .qbox{border-left:5px solid var(--blue);background:#eef3f8;padding:10px 14px;border-radius:8px;margin:12px 0}#gj-app .qbox>b:first-child{color:var(--blue)}#gj-app .worked{border:2px solid #d9733a;border-radius:10px;padding:12px 14px;margin:12px 0;background:#fffaf6}#gj-app .worked>b:first-child{display:inline-block;background:#d9733a;color:#1a1c1e;padding:2px 10px;border-radius:6px;font-size:13px;letter-spacing:.5px;margin-bottom:6px}#gj-app details.ans{margin:8px 0;border:1px dashed var(--line);border-radius:8px;padding:6px 10px;background:#fff}#gj-app details.ans summary{cursor:pointer;font-weight:700;color:var(--blue);min-height:32px;display:flex;align-items:center}#gj-app .eq{display:block;text-align:center;font-family:var(--mono);font-size:16px;margin:8px 0;color:var(--ink)}#gj-app .ov{text-decoration:overline}#gj-app .ov2{text-decoration:overline;text-decoration-style:double}#gj-app .scroll{overflow-x:auto;border-radius:10px;border:1px solid var(--line);margin:10px 0}#gj-app table{border-collapse:collapse;width:100%;min-width:300px;font-size:14px;background:#fff}#gj-app th{background:var(--blue);color:#fff;text-align:left;padding:9px 12px;font-weight:700}#gj-app td{padding:8px 12px;border-top:1px solid var(--line);vertical-align:top}#gj-app tr:nth-child(2n) td{background:#f5f8fb}#gj-app table.tt th,#gj-app table.tt td{text-align:center;font-family:var(--mono)}#gj-app table.tt tr.hl td{background:#fff1c9;font-weight:800}#gj-app .mono{font-family:var(--mono)}#gj-app .bk-fig{margin:12px auto;max-width:min(100%,max(var(--w,640px),140px));text-align:center}#gj-app .bk-zoom{all:unset;box-sizing:border-box;display:block;cursor:zoom-in;background:#fff;border:1px solid var(--line);border-radius:10px;padding:6px;transition:transform .2s,box-shadow .2s}#gj-app .bk-zoom:hover{transform:translateY(-2px);box-shadow:var(--shadow)}#gj-app .bk-zoom:focus-visible{outline:3px solid var(--pink);outline-offset:2px}#gj-app .bk-zoom img{display:block;width:100%;height:auto;max-height:460px;object-fit:contain}#gj-app .bk-fig figcaption{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.4}#gj-app .bk-fig figcaption b{color:var(--blue);margin-right:4px}dialog.bk-lb{border:none;padding:0;background:transparent;max-width:min(96vw,1200px);max-height:94vh;overflow:visible}dialog.bk-lb::backdrop{background:#0a1420d1}dialog.bk-lb figure{margin:0;background:#fff;border-radius:12px;padding:10px;display:flex;flex-direction:column;align-items:center}dialog.bk-lb img{display:block;max-width:100%;max-height:calc(94vh - 70px);width:auto;height:auto;object-fit:contain}dialog.bk-lb figcaption{font:600 14px/1.4 system-ui,sans-serif;color:#1a1c1e;padding:8px 4px 2px;text-align:center}dialog.bk-lb figcaption b{color:#2c4f74;margin-right:4px}dialog.bk-lb .bk-x{position:absolute;top:-16px;right:-16px;width:44px;height:44px;border-radius:50%;border:2px solid #fff;background:#2c4f74;color:#fff;font-size:18px;cursor:pointer}dialog.bk-lb .bk-x:focus-visible{outline:3px solid #e3d1ac}#gj-app .abtn{cursor:pointer;border:none;border-radius:8px;padding:9px 14px;min-height:44px;font-weight:800;font-family:var(--font);font-size:14px;color:#fff;background:var(--blue);transition:transform .12s,filter .12s}#gj-app .abtn:hover{filter:brightness(1.08);transform:translateY(-1px)}#gj-app .abtn:active{transform:scale(.97)}#gj-app .abtn.alt{background:var(--pink)}#gj-app .abtn.ghost{background:#fff;color:var(--blue);border:2px solid var(--line)}#gj-app .abtn:disabled{opacity:.5;cursor:default;transform:none}#gj-app .row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:8px 0}#gj-app .inp{font-family:var(--mono);font-size:15px;padding:8px 10px;min-height:44px;border:2px solid var(--line);border-radius:8px;width:9em;color:var(--ink);background:#fff}#gj-app .inp.wide{width:min(100%,24em)}#gj-app .inp:focus{border-color:var(--blue);outline:none}#gj-app select.inp{font-family:var(--font);width:auto}#gj-app .res{font-weight:700;font-size:14px;min-height:20px;margin-top:6px}#gj-app .res.ok{color:#1f7a4f}#gj-app .res.no{color:#b3261e}#gj-app .prompt{background:#f4f7fa;border:1px dashed var(--line);border-radius:10px;padding:12px 14px;margin:8px 0;font-size:15px}#gj-app .choices{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}#gj-app .choice{cursor:pointer;border:2px solid var(--line);background:#fff;color:var(--ink);border-radius:999px;padding:8px 14px;min-height:44px;font:700 14px var(--font);transition:border-color .12s,background .12s}#gj-app .choice:hover{border-color:var(--blue)}#gj-app .choice:active{transform:scale(.97)}#gj-app .choice.correct{background:#e6f5ee;border-color:#1f7a4f;color:#1f7a4f}#gj-app .choice.wrong{background:#fdeeee;border-color:#b3261e;color:#b3261e}#gj-app .viz{background:linear-gradient(180deg,#10385c,#1c4560);color:#eaf6ff;border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin:14px 0}#gj-app .viz h3{color:#fff;margin-top:0}#gj-app .viz strong{color:#fff}#gj-app .viz .prompt strong{color:var(--blue)}#gj-app .viz .abtn:not(.alt):not(.ghost){background:var(--amber);color:#10385c}#gj-app .viz .abtn.alt{background:#466461}#gj-app .viz .abtn.ghost{background:transparent;color:#eaf6ff;border-color:#ffffff59}#gj-app .viz .res.ok{color:#9ff5c8}#gj-app .viz .res.no{color:#ffb4ab}#gj-app .viz canvas{display:block;max-width:100%;height:auto;background:#0b2a45;border-radius:10px}#gj-app .viz .scroll{border-color:#ffffff40}#gj-app .viz table{color:var(--ink)}#gj-app .viz table strong{color:inherit}#gj-app .viz .inp{background:#fff}#gj-app .log{background:#00000040;border-radius:10px;padding:10px 12px;font-family:var(--mono);font-size:13px;min-height:60px;max-height:190px;overflow-y:auto}#gj-app .log div{padding:2px 0;border-bottom:1px solid rgba(255,255,255,.06)}#gj-app .bit{cursor:pointer;width:44px;height:44px;border-radius:8px;border:2px solid rgba(255,255,255,.35);background:#0b2a45;font:800 18px var(--mono);color:#eaf6ff;transition:background .12s,transform .08s}#gj-app .bit.on{background:#2f9e6b;border-color:#9ff5c8;color:#fff}#gj-app .bit:active{transform:scale(.94)}#gj-app .card .bit{background:#fffdf6;color:var(--ink);border-color:var(--line)}#gj-app .card .bit.on{background:#e6f5ee;border-color:#1f7a4f;color:#1f7a4f}#gj-app .card .bit.bad{background:#fdeeee;border-color:#b3261e;color:#b3261e}#gj-app .bitlab{display:inline-flex;flex-direction:column;align-items:center;gap:3px;font:700 12px var(--mono)}#gj-app .probes{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}#gj-app .node{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:#ffffff1a;font:700 13px var(--mono);min-height:36px}#gj-app .node i{font-style:normal;width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:#3a4b5c;color:#fff}#gj-app .node i.v1{background:#1f7a4f;box-shadow:0 0 10px #9ff5c8b3}#gj-app .node.out{background:#e3d1ac2e}#gj-app .lamp{display:inline-flex;align-items:center;justify-content:center;width:60px;height:60px;border-radius:50%;background:#2a3946;font:800 22px var(--mono);color:#8b9aa7;border:3px solid rgba(255,255,255,.2)}#gj-app .lamp.on{background:#f5c542;color:#10385c;box-shadow:0 0 22px #f5c542cc}#gj-app .lamp.bad{background:#b3261e;color:#fff;box-shadow:0 0 22px #ff5050b3}#gj-app .lamps{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin:10px 0}#gj-app .lamps figure{margin:0;text-align:center;font:700 13px var(--mono)}#gj-app .ripple{display:grid;grid-template-columns:auto repeat(4,minmax(52px,1fr));gap:6px;align-items:center;max-width:460px;font-family:var(--mono)}#gj-app .ripple .h{font-weight:800;text-align:center;font-size:12px;color:#a7c9f5}#gj-app .ripple .l{font-weight:800;font-size:13px}#gj-app .ripple .c{text-align:center}#gj-app .ripple .carry{color:#f5c542;font-weight:800}#gj-app .ripple .sum{font-size:20px;font-weight:800;color:#9ff5c8}#gj-app .kmap{display:inline-grid;gap:0;margin:10px 0;font-family:var(--mono);border-collapse:collapse}#gj-app .kmap .kh{display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;color:#a7c9f5;padding:4px}#gj-app .kmap .corner{font-size:12px;color:#a7c9f5;display:flex;flex-direction:column;justify-content:center;align-items:center;line-height:1.1}#gj-app .kcell{all:unset;box-sizing:border-box;cursor:pointer;width:64px;height:64px;border:1px solid rgba(255,255,255,.35);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font:800 22px var(--mono);color:#eaf6ff;background:#0b2a45;position:relative}#gj-app .kcell.one{background:#24577e;color:#fff}#gj-app .kcell:hover{outline:2px solid var(--amber);outline-offset:-2px}#gj-app .kcell:focus-visible{outline:3px solid var(--amber);outline-offset:-3px}#gj-app .kcell small{position:absolute;top:2px;left:4px;font-size:10px;font-weight:600;color:#eaf6ffd9}#gj-app .kcell .dots{display:flex;gap:3px;height:9px}#gj-app .kcell .dots span{width:9px;height:9px;border-radius:50%}@media(max-width:480px){#gj-app .kcell{width:52px;height:52px;font-size:18px}}#gj-app .legend{display:flex;flex-direction:column;gap:6px;margin:8px 0;font-family:var(--mono);font-size:15px}#gj-app .legend div{display:flex;gap:8px;align-items:center}#gj-app .legend span.sw{width:14px;height:14px;border-radius:50%;flex:0 0 auto}#gj-app .exprout{background:#00000040;border-radius:8px;padding:10px 12px;font-family:var(--mono);font-size:16px;margin:6px 0;word-break:break-word}#gj-app .exprout .ov{text-decoration:overline}#gj-app .steps{list-style:none;padding:0;margin:8px 0;counter-reset:st}#gj-app .steps li{display:none;padding:8px 12px;margin:6px 0;border-radius:8px;background:#f4f7fa;border-left:4px solid var(--blue);counter-increment:st}#gj-app .steps li:before{content:"Step " counter(st) " · ";font-weight:800;color:var(--blue)}#gj-app .steps li.shown{display:block;animation:gj-fade .25s ease}#gj-app .cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}#gj-app .flip{all:unset;display:block;box-sizing:border-box;perspective:900px;height:140px;cursor:pointer}#gj-app .flip:focus-visible{outline:3px solid var(--pink);outline-offset:2px;border-radius:10px}#gj-app .flip .inner{position:relative;display:block;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}#gj-app .flip.on .inner{transform:rotateY(180deg)}#gj-app .flip .side{position:absolute;inset:0;backface-visibility:hidden;border-radius:10px;padding:12px;display:flex;flex-direction:column;justify-content:center;text-align:center;box-shadow:var(--shadow)}#gj-app .flip .front{background:var(--blue);color:#fff;font-weight:800;font-size:15px}#gj-app .flip .front small{font-weight:600;opacity:.85;font-size:11px;margin-top:6px}#gj-app .flip .back{background:#fff;border:2px solid var(--pink);color:var(--ink);font-size:13px;transform:rotateY(180deg)}#gj-app .acc{border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:10px 0;background:#fff}#gj-app .acc .head{all:unset;box-sizing:border-box;width:100%;cursor:pointer;padding:12px 14px;min-height:44px;font-weight:700;background:#f4f8fb;display:flex;justify-content:space-between;gap:10px;align-items:center;color:var(--ink)}#gj-app .acc .head:hover{background:#e9f1f8}#gj-app .acc .head:focus-visible{outline:3px solid var(--pink);outline-offset:-3px}#gj-app .acc .chev{color:var(--pink);font-weight:900;transition:transform .2s}#gj-app .acc.on .chev{transform:rotate(90deg)}#gj-app .acc .body{display:none;padding:12px 14px;border-top:1px dashed var(--line)}#gj-app .acc.on .body{display:block}#gj-app .marks{font:700 12px var(--mono);color:var(--muted);white-space:nowrap}#gj-app .q{margin:14px 0;padding:14px;border:1px solid var(--line);border-radius:10px;background:#fff}#gj-app .q .opts{display:flex;flex-direction:column;gap:8px;margin-top:8px}#gj-app .opt{cursor:pointer;text-align:left;border:2px solid var(--line);background:#fff;color:var(--ink);border-radius:9px;padding:10px 12px;min-height:44px;font-family:var(--font);font-size:14px;font-weight:600;transition:border-color .12s}#gj-app .opt:hover{border-color:var(--blue)}#gj-app .opt.correct{background:#e6f5ee;border-color:#1f7a4f;color:#1f7a4f}#gj-app .opt.wrong{background:#fdeeee;border-color:#b3261e;color:#b3261e}#gj-app .opt:disabled{cursor:default}#gj-app .score{font-weight:800;color:var(--blue);font-size:16px;margin-top:6px}#gj-app .foot{text-align:center;color:var(--muted);font-size:12px;margin-top:14px}@media(hover:none){#gj-app .bk-zoom:hover{transform:none}}@media(prefers-reduced-motion:reduce){#gj-app *{animation:none!important;transition:none!important}}