:root{--ink:#23242c;--muted:#7b7e8d;--line:#e7e8ed;--paper:#f7f8fb;--accent:#7362cc;--purple:#eeeafa;--nav:#20232d;--green:#34816d}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 'Segoe UI',Arial,sans-serif}button,input,textarea{font:inherit}button,a,input,textarea{outline-offset:4px}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--accent)}button{border:0}#sidebar{position:fixed;inset:0 auto 0 0;width:280px;background:var(--nav);color:#d5d7e1;padding:32px 22px;overflow-y:auto;z-index:20;display:flex;flex-direction:column}.brand{text-decoration:none;color:white;font-size:27px;font-weight:700;display:flex;gap:11px;align-items:center;letter-spacing:-1px}.brand-icon{display:grid;place-items:center;border-radius:12px;width:42px;height:42px;background:#aaa0ee;color:#20232d;font-size:30px}.sidebar-caption{font-size:10px;letter-spacing:2px;color:#8e92a7;margin:33px 12px 14px}.side-home{background:#343743;color:#fff;text-align:left;padding:12px 15px;border-radius:9px;width:100%}.side-module{display:flex;gap:11px;text-align:left;width:100%;background:none;color:#c8cad5;border-radius:9px;padding:11px 9px;margin:5px 0;line-height:1.4;font-size:13px}.side-module:hover,.side-module.active{background:#343743;color:white}.module-number{color:#8a8e9e;font-size:11px;min-width:20px;padding-top:2px}.side-module small{color:#8b90a3;display:block;margin-top:5px;font-size:11px}#side-progress{font-size:11px;color:#b8bccc;padding:22px 12px 16px}.progress-track{height:4px;background:#3b3e49;border-radius:4px;margin-top:10px;overflow:hidden}.progress-fill{height:100%;background:#b1a7f2;transition:width .2s}.sidebar-footer{font-size:12px;color:#d4d6df;margin-top:auto;padding:45px 8px 0;line-height:1.9}.sidebar-footer 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170px)}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2.1px;text-transform:uppercase;color:var(--accent);margin-bottom:12px}h1,h2,h3,p{margin-top:0}h1{font-size:39px;line-height:1.2;letter-spacing:-1.3px;font-weight:650;margin-bottom:18px}h2{font-size:22px;line-height:1.4;font-weight:650;letter-spacing:-.5px}h3{font-size:17px;line-height:1.45;font-weight:600}.muted{color:var(--muted)}.hero{display:grid;grid-template-columns:1.25fr 1fr;gap:24px;border:1px solid #e1dcef;border-radius:20px;background:linear-gradient(115deg,#f0ecfb,#f9f6ff);padding:38px 40px;margin-bottom:30px;overflow:hidden}.hero p{max-width:510px;color:#747083;font-size:14px}.hero-art{position:relative;display:flex;align-items:center;justify-content:center;min-height:220px}.code-card{width:270px;transform:rotate(-5deg);border-radius:14px;background:#272a37;color:#d7cee9;box-shadow:16px 20px 0 #dfd8ee;padding:22px 24px;font:12px/2.2 Consolas,monospace}.code-card 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span{font-size:11px;color:var(--muted)}.section-row{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:28px 0 18px}.section-row h2{margin:0}.pill{font-size:10px;border-radius:5px;background:#eeeff4;color:#75798b;padding:4px 8px;white-space:nowrap}.pill.green{background:#e6f2ec;color:#387b65}.pill.purple{background:var(--purple);color:var(--accent)}.pill.amber{background:#f7f0df;color:#96712e}.module-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.module-card{background:white;border:1px solid var(--line);border-radius:13px;padding:23px;display:flex;flex-direction:column;min-height:228px;transition:transform .2s,box-shadow .2s}.module-card:hover{transform:translateY(-3px);box-shadow:0 8px 20px #24253b07}.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:19px}.module-symbol{display:grid;place-items:center;width:37px;height:37px;border-radius:10px;background:var(--purple);color:var(--accent);font:16px 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button.active{color:var(--accent);font-weight:600}.small-caption{font-size:10px;letter-spacing:1.1px;color:#9697a4;text-transform:uppercase;margin-bottom:9px}.empty{text-align:center;padding:60px 24px;color:var(--muted)}.icon-button{background:none;font-size:20px}footer{border-top:1px solid var(--line);padding:22px 42px;color:#9699a5;font-size:10px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}footer button{background:none;color:#777284;font-size:10px;padding:0}.import-label{cursor:pointer}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(100px);background:#292c36;color:white;padding:10px 20px;border-radius:8px;font-size:12px;z-index:50;transition:transform .2s}#toast.visible{transform:translateX(-50%) translateY(0)}.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.filter-row button{background:#fff;border:1px solid var(--line);border-radius:7px;padding:6px 12px;font-size:11px;color:#85808e}.filter-row button.active{background:var(--purple);border-color:#d5cceb;color:var(--accent)}.back{background:none;color:#8a819b;font-size:12px;padding:0;margin-bottom:20px}.mini-progress{margin-top:15px;height:3px;border-radius:4px;background:#f0edf6;overflow:hidden}.mini-progress span{display:block;height:100%;background:#b0a2df}.source-fallback{white-space:pre-wrap;font-size:14px;line-height:1.85}.search-count{font-size:12px;color:var(--muted)}@media(min-width:1600px){main{padding:50px 60px}.module-card{min-height:240px}}@media(max-width:1200px){#sidebar{width:240px;padding:25px 16px}.workspace{margin-left:240px}header{padding:0 28px}main{padding:28px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-layout{grid-template-columns:minmax(0,1fr) 235px}.hero{padding:30px}.hero-art{min-height:180px}.code-card{width:220px;font-size:10px}.art-label{right:-10px}.lesson-top{display:block}.lesson-top .actions{margin-top:15px}.search-wrap{width:250px}}@media(max-width:900px){.lesson-layout{grid-template-columns:1fr}.lesson-aside{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.hero{grid-template-columns:1fr}.hero-art{display:none}.stats{grid-template-columns:repeat(2,1fr)}.breadcrumb{display:none}.search-wrap{flex:1;width:auto}.row-tags{display:none}}@media(max-width:700px){#sidebar{transform:translateX(-100%);transition:transform .2s;width:280px;box-shadow:10px 0 60px #0003}body.menu-open #sidebar{transform:translateX(0)}.workspace{margin:0}#menu{display:block}header{height:72px;padding:0 20px;gap:14px}main{padding:24px 18px}.hero{padding:28px 24px;border-radius:13px}h1{font-size:32px}.stats{gap:10px;margin-bottom:28px}.stat{padding:14px 18px}.module-grid{grid-template-columns:1fr}.module-card{min-height:185px}.lesson-top h1{font-size:26px}.lesson-aside{display:block}.content-block{padding:22px}.lesson-row{padding:16px;gap:12px}.lesson-row 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.portal-intro{margin-top:28px}.portal-content h1{font-size:25px;line-height:1.35;margin:30px 0 18px}.portal-content h2{margin-top:28px}.portal-content h3{margin-top:20px}.portal-content .source-div{margin:9px 0}.image-unavailable{border:1px dashed #d8d1e7;background:#faf8fe;color:#93869e;border-radius:8px;font-size:12px;padding:15px;margin:16px 0;}