@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:400;src:url(./barlow-latin-400-normal-qiz4-Cze.woff2) format("woff2"),url(./barlow-latin-400-normal-fsAxiSwU.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:500;src:url(./barlow-latin-500-normal-BPAOfeC8.woff2) format("woff2"),url(./barlow-latin-500-normal-C1h8hMer.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:600;src:url(./barlow-latin-600-normal-DILqtrty.woff2) format("woff2"),url(./barlow-latin-600-normal-CNwfPWQD.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:700;src:url(./barlow-latin-700-normal-A9pxMQ4z.woff2) format("woff2"),url(./barlow-latin-700-normal-__SGTsZ1.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:800;src:url(./barlow-latin-800-normal-s1sAMnoV.woff2) format("woff2"),url(./barlow-latin-800-normal-BdVooDN4.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:400;src:url(./barlow-latin-ext-400-normal-HxX4XjxC.woff2) format("woff2"),url(./barlow-latin-ext-400-normal-CvBsJvxq.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:500;src:url(./barlow-latin-ext-500-normal-DOaysfXq.woff2) format("woff2"),url(./barlow-latin-ext-500-normal-CJPcKP2Q.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:600;src:url(./barlow-latin-ext-600-normal-B8NK_A3D.woff2) format("woff2"),url(./barlow-latin-ext-600-normal-DMVRjfRT.woff) format("woff")}@font-face{font-family:Barlow;font-style:normal;font-display:swap;font-weight:700;src:url(./barlow-latin-ext-700-normal-BLuWmldJ.woff2) format("woff2"),url(./barlow-latin-ext-700-normal-CctuGmmz.woff) format("woff")}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(./ibm-plex-mono-latin-400-normal-DMJ8VG8y.woff2) format("woff2"),url(./ibm-plex-mono-latin-400-normal-CvHOgSBP.woff) format("woff")}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(./ibm-plex-mono-latin-ext-400-normal-BmRBH3aV.woff2) format("woff2"),url(./ibm-plex-mono-latin-ext-400-normal-D3D2R8hC.woff) format("woff")}:root{font-family:Barlow,Arial,sans-serif;color:#20282d;background:#f4f5f2;font-synthesis:none;font-weight:400;--bg: #f4f5f2;--ink: #20282d;--muted: #59636d;--line: #d3d8d8;--accent: #d94d2e;--mono: "IBM Plex Mono", monospace}*{box-sizing:border-box}body{margin:0}button,a,input,select{-webkit-tap-highlight-color:transparent}button,input,select{font:inherit}button{color:inherit;background:none;border:0;cursor:pointer}button:disabled{cursor:default;opacity:.45}a{color:inherit;text-decoration:none}button,a,select,input{outline-offset:4px}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--accent)}button:not(:disabled),a{transition:background .15s,color .15s}button:not(:disabled):hover{color:var(--accent)}a:hover{color:var(--accent)}input[type=range]{accent-color:var(--accent);height:22px;cursor:pointer;min-width:0}select{background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:2px;padding:7px 26px 7px 10px;cursor:pointer;max-width:100%}h1,h2,h3,p{margin:0}svg{flex-shrink:0}.app-shell{height:100dvh;min-height:650px;display:grid;grid-template-rows:67px 1fr 49px;overflow:hidden}.masthead{display:flex;align-items:center;border-bottom:1px solid var(--line);padding:0 26px;gap:30px;z-index:40;background:var(--bg)}.brand{display:flex;align-items:center;white-space:nowrap;gap:22px}.brand strong{font-size:44px;line-height:1;font-weight:800;letter-spacing:-2px;color:var(--accent)}.brand span{font-size:15px;letter-spacing:.35px;border-left:1px solid #c8cdcd;padding:9px 0 9px 22px;color:#49545f}.top-nav{display:flex;gap:25px;align-self:stretch;margin-left:auto}.top-nav button{position:relative;font-weight:500;font-size:15px;padding:0 10px}.top-nav button.active:after{content:"";position:absolute;bottom:13px;height:2px;background:var(--accent);left:0;right:0}.header-right{display:flex;gap:25px;align-items:center;margin-left:35px;font-size:14px}.header-right>a{display:flex;align-items:center;gap:5px;font-weight:600}.language-switch{display:flex;align-items:center;gap:5px;border-left:1px solid var(--line);padding-left:22px;font-size:13px}.language-switch button{padding:7px 2px;color:#68717a}.language-switch button[aria-pressed=true]{color:#20282d;font-weight:600}.language-switch span{color:#68717a}.workspace{display:grid;grid-template-columns:195px minmax(0,1fr) 295px;min-height:0}.systems-rail{border-right:1px solid var(--line);display:flex;flex-direction:column;padding-top:27px}.section-label{font:11px/1.5 var(--mono);letter-spacing:2px;font-weight:400;color:#49545f}.systems-rail>.section-label{padding:0 25px;margin-bottom:22px}.systems-rail nav{display:flex;flex-direction:column;gap:3px}.systems-rail nav button{display:flex;align-items:center;text-align:left;gap:22px;padding:13px 25px;font-size:16px;font-weight:500;min-height:43px}.systems-rail nav button span{font-size:14px;font-weight:400;color:#68717a}.systems-rail nav button.active{background:#fbe5dc;color:#cf4625}.systems-rail nav button.active span{color:#cf4625;font-weight:600}.systems-rail nav button:hover{background:#e9ece7}.rail-bottom{margin:auto 23px 33px;border-top:1px solid var(--line);padding-top:24px;display:flex;align-items:center;gap:14px}.rail-bottom svg{width:41px;height:90px;opacity:.8}.rail-bottom p{font:9px/1.7 var(--mono);letter-spacing:1.5px}.rail-bottom i{display:block;width:12px;height:2px;background:var(--accent);margin-top:13px}.explorer{position:relative;min-width:0;overflow:hidden}.viewport-heading{position:absolute;top:26px;left:30px;right:25px;z-index:5;pointer-events:none}.viewport-heading h1{font-size:clamp(30px,3.25vw,52px);font-weight:700;letter-spacing:-1.7px;line-height:1.05;max-width:95%}.viewport-heading p{font-size:clamp(16px,1.45vw,23px);color:#59616c;line-height:1.4;margin-top:8px}.view-buttons{position:absolute;right:20px;top:117px;z-index:21;display:flex;gap:5px}.view-buttons button{font-size:12px;border:1px solid #c9ced0;border-radius:2px;padding:7px 11px;background:#f4f5f2e8}.view-buttons button.active{border-color:var(--accent)}.viewport{position:absolute;inset:110px 0 52px;touch-action:none}.viewport canvas{outline:none}.viewport-options{position:absolute;top:121px;left:25px;z-index:22;display:flex;align-items:center;gap:5px}.viewport-options label{display:flex;align-items:center;gap:8px}.viewport-options label>span{font:8px var(--mono);color:#69747a;letter-spacing:1px}.viewport-options select{font-size:11px;padding:5px 17px 5px 7px;background:#f4f5f2dc;border-color:#d5dad6}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px}.model-callout{display:flex;align-items:center;gap:8px;white-space:nowrap;font-size:10px;padding:7px 8px;color:#35454e;background:#f4f5f2d6;border-radius:2px;transform:translate(35%);box-shadow:0 0 10px #f4f5f270}.model-callout span{display:block;height:7px;width:7px;background:var(--accent);border-radius:50%;box-shadow:0 0 0 2px var(--bg)}.model-callout:before{content:"";width:25px;height:1px;background:var(--accent)}.model-callout:hover{background:#fff}.explode-toolbar{position:absolute;bottom:40px;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:19px;z-index:25;white-space:nowrap;background:#f4f5f2d9;padding:8px 13px;border-radius:3px}.explode-input{display:flex;align-items:center;gap:11px;font-size:11px}.explode-input input{width:145px}.reset-button{display:flex;align-items:center;gap:10px;border-left:1px solid #c6cdcd;padding:1px 0 1px 20px;font-size:11px}.stage-readout{position:absolute;bottom:-17px;left:12px;font:9px var(--mono);color:#626d75;letter-spacing:.2px}.viewport-hint{position:absolute;bottom:10px;text-align:center;left:10px;right:10px;font-size:10px;letter-spacing:.5px;color:#69757b;pointer-events:none}.lesson-container{min-height:0;overflow:hidden}.lesson-panel{height:100%;border-left:1px solid var(--line);display:flex;flex-direction:column}.lesson-scroll{padding:29px 24px 20px;overflow:auto;scrollbar-width:thin;scrollbar-color:#c9cdca transparent;flex:1}.lesson-panel .section-label{letter-spacing:1.5px;font-size:10px;white-space:nowrap}.lesson-panel h2{font-size:40px;line-height:1.09;letter-spacing:-1.2px;font-weight:700;margin:36px 0 22px}.lesson-summary{font-size:16px;line-height:1.5;color:#46505b}.connection-chain{list-style:none;padding:20px 0;margin:25px 0 24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.connection-chain li{display:flex;align-items:center;flex-direction:column;gap:9px}.connection-chain li>div{display:flex;align-items:center;gap:24px;font-size:14px;min-height:26px}.connection-chain .chain-arrow{margin:0 0 8px;color:#627077}.overview-chain{padding:30px 0}.overview-chain li{gap:9px}.overview-chain li>div{font-size:17px;min-width:158px;min-height:29px}.overview-chain .chain-arrow{margin-bottom:10px}.lesson-panel h3{font-size:15px;font-weight:600;margin-bottom:9px}.explanation{font-size:14px;line-height:1.55;color:#59636d}.lesson-bottom{padding:15px 24px 26px;background:var(--bg);border-top:1px solid var(--line)}.primary-button{background:var(--accent);color:#fff;min-height:53px;padding:14px 19px;display:flex;align-items:center;justify-content:center;gap:14px;width:100%;font-size:16px;font-weight:600;border-radius:2px}.primary-button:not(:disabled):hover{background:#bd3c21;color:#fff}.text-button{display:inline-flex;align-items:center;gap:9px;font-size:12px;line-height:1.5;padding:6px 0}.selected-id{padding:12px 0 0;margin-top:10px;display:flex;flex-direction:column;gap:5px}.selected-id>span{font:8px var(--mono);color:#66747a;letter-spacing:1px}.selected-id code{font:9px var(--mono);overflow-wrap:anywhere;color:#ba452d}.signal-map{border-top:1px solid var(--line);padding-top:17px;margin-top:20px;display:grid;gap:15px}.signal-map dt{font:9px var(--mono);color:#617078;letter-spacing:1px;margin-bottom:5px}.signal-map dd{font-size:13px;line-height:1.5;margin:0}.model-note{display:flex;gap:8px;margin-top:22px;font-size:11px;line-height:1.6;color:#677177}.model-note svg{margin-top:2px}.source-link{display:flex;gap:5px;margin-top:15px;font-size:11px;color:#3b6874;align-items:center}.component-list{margin-top:23px;border-top:1px solid var(--line)}.component-list button{border-bottom:1px solid var(--line);width:100%;display:flex;justify-content:space-between;align-items:center;padding:11px 0;font-size:13px}.joint-controls,.behavior-controls,.perception-controls{position:absolute;z-index:24;left:25px;top:174px;background:#f4f5f2ec;border-left:2px solid var(--accent);padding:13px 16px;max-width:260px;box-shadow:0 4px 20px #f4f5f280}.joint-select{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.joint-select>span{font:9px var(--mono);letter-spacing:1.4px;color:#626c75}.joint-select select{font-size:14px;font-weight:500;min-width:180px}.joint-controls>p{font-size:10px;line-height:1.5;color:#59636d;margin-top:10px;max-width:220px}.motion-input{display:flex;align-items:center;gap:3px;margin-top:12px}.motion-input input{width:115px}.motion-input output{font:10px var(--mono);min-width:39px;text-align:right}.joint-controls>small,.behavior-controls>small{display:block;color:#6c7374;font:8px var(--mono);margin-top:10px}.segmented{display:flex;gap:2px}.segmented button{font-size:11px;padding:7px 8px;border:1px solid transparent}.segmented button.active{border-color:var(--accent);color:var(--accent)}.behavior-controls .text-button{margin-top:12px}.balance-legend{font-size:9px;display:flex;gap:12px;margin-top:14px;flex-wrap:wrap}.balance-legend span{display:flex;align-items:center;gap:4px}.balance-legend i{display:block;width:6px;height:6px;border-radius:50%}.com{background:var(--accent)}.cop{background:#397785}.perception-controls{max-width:280px}.perception-controls>div{display:flex;gap:3px;margin-top:13px}.perception-controls>div button{display:flex;flex-direction:column;gap:6px;text-align:left;padding:5px 6px;font-size:10px;border-bottom:1px solid var(--line)}.perception-controls>div button span{font:8px var(--mono);color:#667}.perception-controls>div button.active{border-color:var(--accent);color:var(--accent)}.perception-controls>p:last-child{font-size:10px;margin-top:12px;color:#5b696f}.physical-loop{position:absolute;left:25px;bottom:102px;right:25px;display:flex;align-items:center;justify-content:center;gap:9px;font:9px var(--mono);background:#f4f5f2eb;padding:14px 5px;z-index:22;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.axis-label{font:8px var(--mono);padding:4px;background:#f4f5f2d9;white-space:nowrap;color:#495b62}.target-label{font-size:10px;white-space:nowrap;padding:6px;border:1px solid #c97029;background:var(--bg)}.footer{display:flex;align-items:center;gap:25px;border-top:1px solid var(--line);padding:0 25px;font:10px var(--mono);letter-spacing:.3px;color:#59636d}.footer>button{display:flex;align-items:center;gap:10px;font-size:inherit;padding:8px 0}.footer-rule{height:1px;flex:1;background:var(--line);margin-right:10px}.learning-path{position:absolute;inset:0;background:#f4f5ff;z-index:35;overflow:auto;padding:30px;background:var(--bg)}.learning-header{display:flex;justify-content:space-between;gap:15px}.learning-header h1{font-size:36px;letter-spacing:-1px;margin-top:16px;line-height:1.05}.learning-header p:last-child{font-size:16px;color:#66717a;margin-top:10px}.learning-path ol{list-style:none;padding:0;margin:25px 0 0}.learning-path li{border-top:1px solid var(--line)}.learning-path li:last-child{border-bottom:1px solid var(--line)}.learning-path li button{display:flex;width:100%;padding:16px 0;align-items:center;text-align:left;gap:22px}.learning-path li button>svg{margin-left:auto}.chapter-number{font:12px var(--mono);color:var(--accent)}.learning-path li strong{font-size:16px;display:block;font-weight:600}.learning-path li small{display:block;font-size:12px;margin-top:5px;color:#637078}.chapter-progress{position:absolute;bottom:100px;left:25px;z-index:25;display:flex;align-items:center;gap:9px;font:9px var(--mono);background:var(--bg);border:1px solid var(--line);padding:4px 7px}.chapter-progress button{display:flex;padding:5px}.info-dialog{max-width:740px;width:calc(100% - 32px);border:1px solid var(--line);padding:0;background:var(--bg);color:var(--ink);max-height:85dvh}.info-dialog::backdrop{background:#18252770;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.dialog-content{position:relative;padding:38px}.close-dialog{position:absolute;right:18px;top:18px}.dialog-content h2{font-size:40px;line-height:1.1;letter-spacing:-1.2px;margin:18px 0 20px}.dialog-content>p{font-size:15px;line-height:1.6;color:#59636d}.dialog-content h3{font-size:19px;margin:28px 0 12px}.assumptions{display:grid;gap:19px;padding:23px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:24px 0}.assumptions dt{font-size:14px;font-weight:600}.assumptions dd{font-size:13px;line-height:1.6;margin:5px 0 0;color:#637078}.dialog-content p.muted{font-size:12px}.sources-list{margin:20px 0}.sources-list a{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}.sources-list strong{display:block;font-size:13px;font-weight:600}.sources-list small{display:block;font-size:12px;margin-top:4px;color:#637078}.download-model{display:flex;gap:12px;align-items:center;color:var(--accent);font-size:14px;margin-top:20px}.ecosystem-links a{display:flex;gap:20px;align-items:center;padding:10px 0;font-size:13px}.ecosystem-links strong{font:12px var(--mono);min-width:30px}.ecosystem-links a svg{margin-left:auto}.scene-loading{font-size:12px;white-space:nowrap;color:#59636d;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;gap:14px;align-items:center}.loading-symbol{border:1px solid var(--line);padding:12px 18px;font-weight:700;color:var(--accent);font-size:30px}.scene-fallback{height:100%;position:relative;display:flex;align-items:center;justify-content:center}.scene-fallback>img{height:90%;max-width:100%;object-fit:contain;opacity:.6}.scene-fallback>div{position:absolute;max-width:300px;background:#f4f5f2e8;padding:20px;bottom:80px;border:1px solid var(--line)}.scene-fallback p{font-size:13px;margin-top:10px;line-height:1.5}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;top:-100px;left:20px;z-index:100;background:var(--bg);padding:12px;border:2px solid var(--accent)}.skip-link:focus{top:10px}@media(min-width:1550px){.workspace{grid-template-columns:210px minmax(0,1fr) 330px}.viewport-heading h1{font-size:56px}.lesson-panel h2{font-size:46px}.lesson-scroll{padding:30px}.lesson-summary{font-size:18px}.overview-chain li>div{font-size:18px}.lesson-bottom{padding:24px 30px 40px}.systems-rail nav button{padding:15px 25px}.viewport{inset:120px 0 45px}.view-buttons{top:123px}.viewport-options{top:125px}}@media(max-width:1200px){.workspace{grid-template-columns:155px minmax(0,1fr) 255px}.masthead{gap:15px;padding:0 20px}.brand{gap:14px}.brand span{font-size:12px;padding-left:14px}.brand strong{font-size:38px}.header-right{margin-left:10px;gap:15px}.top-nav{gap:10px}.top-nav button{font-size:13px}.systems-rail nav button{padding:12px 19px;font-size:14px;gap:15px}.systems-rail>.section-label{padding:0 19px}.lesson-scroll{padding:26px 20px 15px}.lesson-panel h2{font-size:34px;margin-top:30px}.lesson-summary{font-size:15px}.lesson-bottom{padding:15px 20px 25px}.lesson-panel .section-label{font-size:9px;letter-spacing:1px}.viewport-heading{left:23px}.viewport-heading h1{font-size:36px}.viewport-heading p{font-size:17px}.rail-bottom{margin:auto 18px 30px;gap:8px}.rail-bottom p{font-size:8px;letter-spacing:.8px}.rail-bottom svg{width:30px}.joint-controls{max-width:220px;padding:12px}.motion-input input{width:90px}.view-buttons{right:15px}.view-buttons button{padding:6px 8px}.explode-toolbar{gap:12px;padding:8px}.explode-input{gap:8px}.explode-input input{width:112px}.reset-button{padding-left:12px;gap:6px}.overview-chain{padding:22px 0}.overview-chain li{gap:6px}.overview-chain li>div{font-size:16px;min-width:140px}}@media(max-height:790px)and (min-width:901px){.app-shell{min-height:610px}.systems-rail{padding-top:20px}.systems-rail nav button{padding-top:9px;padding-bottom:9px;min-height:36px}.systems-rail>.section-label{margin-bottom:15px}.rail-bottom{margin-bottom:20px;padding-top:15px}.rail-bottom svg{height:62px}.lesson-panel h2{margin:22px 0 17px;font-size:35px}.lesson-scroll{padding-top:23px}.connection-chain{margin-top:19px}.overview-chain{padding:17px 0}.overview-chain li{gap:4px}.overview-chain .chain-arrow{margin-bottom:5px}.overview-chain li>div{font-size:16px;min-height:24px}.lesson-bottom{padding-top:12px;padding-bottom:18px}.primary-button{min-height:47px}.viewport-heading h1{font-size:36px}.viewport-heading p{font-size:17px}}@media(max-width:900px){.app-shell{height:auto;min-height:100dvh;display:block;overflow:visible}.masthead{height:66px;padding:0 17px;gap:14px;flex-wrap:wrap}.brand span{display:none}.brand strong{font-size:37px}.header-right{margin-left:0;gap:14px}.language-switch{padding-left:13px}.top-nav{gap:7px;margin-left:auto}.top-nav button{font-size:12px;padding:0 7px}.top-nav button.active:after{bottom:13px}.workspace{display:flex;flex-direction:column}.systems-rail{padding:0;border-right:0;border-bottom:1px solid var(--line);position:relative;background:var(--bg);z-index:40}.systems-rail>.section-label,.rail-bottom{display:none}.systems-rail nav{flex-direction:row;overflow-x:auto;gap:0;scrollbar-width:thin}.systems-rail nav button{white-space:nowrap;gap:7px;padding:14px 17px;font-size:13px;min-height:45px}.systems-rail nav button span{font-size:10px}.explorer{height:690px;flex-shrink:0}.viewport-heading{left:24px;top:24px;right:24px}.viewport-heading h1{font-size:37px;max-width:100%}.viewport-heading p{font-size:17px;max-width:90%}.viewport{inset:110px 0 52px}.viewport-options{left:20px;top:120px}.view-buttons{top:120px;right:20px}.lesson-container{overflow:visible;border-top:1px solid var(--line)}.lesson-panel{border-left:0;height:auto}.lesson-scroll{padding:28px 25px;overflow:visible}.lesson-panel h2{font-size:38px;margin-top:20px}.lesson-summary{max-width:620px;font-size:17px}.lesson-bottom{padding:10px 25px 25px;border-top:0}.primary-button{width:auto;min-width:230px}.overview-chain{display:flex;justify-content:space-between;align-items:flex-start;gap:6px;padding:22px 0;margin-bottom:0}.overview-chain li{position:relative;flex:1}.overview-chain li>div{flex-direction:column;gap:12px;font-size:13px;min-width:0}.overview-chain .chain-arrow{position:absolute;right:-12px;top:2px;transform:rotate(-90deg)}.connection-chain:not(.overview-chain){max-width:500px}.signal-map{grid-template-columns:1fr 1fr}.explanation{max-width:620px}.component-list{max-width:500px}.model-note{max-width:620px}.footer{min-height:52px;padding:14px 20px;font-size:8px;gap:12px}.footer-rule{display:none}.footer>span:last-child{margin-left:auto}.learning-path{padding:25px}.joint-controls,.behavior-controls,.perception-controls{top:166px;left:20px}.chapter-progress{bottom:104px}.physical-loop{gap:7px;font-size:8px}.lesson-panel .section-label{font-size:10px}.scene-fallback>div{bottom:35px}}@media(max-width:520px){.masthead{height:62px;padding:0 14px;gap:8px}.brand strong{font-size:33px}.top-nav{gap:0}.top-nav button{font-size:11px;padding:0 8px}.header-right{gap:8px;font-size:11px}.header-right>a{font-size:11px;gap:1px}.header-right>a svg{width:13px}.language-switch{padding-left:7px;gap:1px;font-size:10px}.systems-rail nav button{padding:13px 14px;font-size:12px;gap:6px}.explorer{height:650px}.viewport-heading{left:19px;right:19px;top:22px}.viewport-heading h1{font-size:34px;letter-spacing:-1.2px;max-width:340px}.viewport-heading p{font-size:15px;max-width:310px;line-height:1.4}.viewport{inset:135px -24px 64px}.viewport-options{top:131px;left:16px}.viewport-options label>span{display:none}.viewport-options select{font-size:10px}.view-buttons{top:131px;right:15px;gap:4px}.view-buttons button{font-size:10px;padding:6px 9px}.explode-toolbar{bottom:39px;gap:10px;padding:5px 0;background:#f4f5f2e0}.explode-input{gap:6px;font-size:10px}.explode-input input{width:101px}.reset-button{font-size:10px;gap:5px;padding-left:9px}.reset-button svg{width:13px}.viewport-hint{font-size:8px;bottom:11px}.stage-readout{font-size:8px;left:0;bottom:-16px}.lesson-scroll{padding:28px 22px}.lesson-panel h2{font-size:36px}.lesson-summary{font-size:16px}.lesson-bottom{padding-left:22px}.overview-chain li>div{font-size:12px;gap:12px}.overview-chain li svg{width:20px}.overview-chain .chain-arrow{width:15px;right:-9px}.footer{font-size:8px;padding:12px 16px}.footer>button{gap:5px;max-width:200px;text-align:left}.footer>span:last-child{font-size:7px;white-space:nowrap}.joint-controls{top:177px;left:15px;padding:8px 11px;max-width:185px}.joint-select>span{font-size:8px}.joint-select select{font-size:11px;min-width:155px;padding:5px 8px}.joint-controls>p{font-size:9px;max-width:165px}.motion-input{margin-top:6px}.motion-input input{width:85px}.motion-input output{font-size:8px;min-width:30px}.joint-controls>small{font-size:7px;margin-top:4px}.behavior-controls{top:177px;left:15px;max-width:280px;padding:9px 11px}.behavior-controls>small{font-size:7px}.segmented button{font-size:10px;padding:6px 8px}.perception-controls{top:177px;left:15px;padding:9px 11px}.perception-controls .section-label{font-size:8px}.perception-controls>div{margin-top:8px}.physical-loop{left:15px;right:15px;bottom:98px;font-size:7px;gap:3px}.physical-loop svg{width:10px}.chapter-progress{left:15px;bottom:99px;font-size:8px;gap:5px}.model-callout{font-size:9px;gap:4px;padding:5px;transform:translate(10%)}.model-callout:before{width:13px}.learning-header h1{font-size:30px}.learning-header p:last-child{font-size:14px}.learning-path li button{gap:17px;padding:14px 0}.learning-path li strong{font-size:15px}.learning-path li small{font-size:11px}.dialog-content{padding:28px 22px}.dialog-content h2{font-size:33px}.dialog-content>.section-label{font-size:9px}.info-dialog{max-height:90dvh}.dialog-content>p{font-size:14px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.part-label{background:#f4f5f2e8;border-bottom:1px solid #a8b3b4;display:flex;align-items:center;gap:6px;padding:5px 7px;font-size:10px;white-space:nowrap}.part-label span{font:8px var(--mono);color:var(--accent)}.behavior-progress{display:flex;gap:8px;align-items:center;font-size:10px;margin-top:8px}.behavior-progress input{width:128px}.behavior-progress output{font:9px var(--mono)}.flow-controls{position:absolute;left:25px;top:173px;z-index:23;background:#f4f5f2e8;border-left:2px solid var(--accent);padding:9px 13px}.flow-controls small{display:block;font:8px var(--mono);color:#637078;margin-top:5px}.flow-controls .text-button{font-size:12px}@media(max-width:520px){.flow-controls{top:177px;left:15px;max-width:240px}.flow-controls small{font-size:7px}}@media(max-width:520px){.explorer{height:700px}.viewport{inset:174px -24px 64px}.viewport-options,.view-buttons{top:167px}.joint-controls,.behavior-controls,.perception-controls,.flow-controls{top:211px}.language-switch button{min-height:34px}}.explorer-content{display:contents}@media(max-width:520px){.rotation-label{display:none}}.physical-ai-button{display:flex;color:var(--accent)}