:root{color-scheme:light;--bg:#f4f2e9;--paper:#fffdf6;--ink:#263a3d;--muted:#72817e;--line:#d9e0d5;--teal:#328f83;--purple:#8d79b4;--orange:#be8550;--red:#b3604f}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button{font:inherit;color:inherit;cursor:pointer;background:var(--paper);border:1px solid var(--line);padding:8px 12px;border-radius:9px;min-height:38px}button:hover:not(:disabled){border-color:var(--teal)}button:disabled{opacity:.4;cursor:default}button:focus-visible{outline:3px solid #deac66;outline-offset:3px}h1,h2,h3,p{margin:0}#game{max-width:1800px;margin:0 auto;padding:22px 28px}.topbar{display:flex;align-items:center;gap:25px;padding-bottom:18px}.brand{display:flex;align-items:center;gap:11px}.brand-mark{display:grid;place-items:center;width:39px;height:44px;background:var(--ink);color:var(--paper);border-radius:10px;font-size:24px;font-weight:600}.brand h1{font-size:20px;letter-spacing:.05em;font-weight:600}.brand div>span{font-size:9px;letter-spacing:.17em;color:var(--muted)}.chapter{display:flex;gap:12px;align-items:center;border-left:1px solid var(--line);padding-left:24px}.chapter span{font-size:11px;color:var(--muted)}.chapter strong{font-weight:500;font-size:16px}#about-open{margin-left:auto;font-size:12px}.route{display:flex;align-items:center;gap:13px;font-size:11px;color:var(--muted);border-top:1px solid var(--line);padding:13px 0}.route i{font-style:normal;opacity:.5}.route strong{color:var(--teal);font-weight:600}.route-tail{margin-left:auto}main{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:18px}.arena{position:relative;height:calc(100vh - 225px);min-height:470px;max-height:850px;background:#faf9f2;border:1px solid var(--line);border-radius:18px;overflow:hidden}#scene,#labels{position:absolute;inset:0}#scene{touch-action:none}canvas{display:block;width:100%;height:100%}#labels{pointer-events:none}.scene-top{position:absolute;top:16px;left:17px;right:17px;display:flex;justify-content:space-between;gap:12px;pointer-events:none;font-size:12px;color:var(--muted)}.scene-top b{font-size:16px;color:var(--ink);margin:0 9px}.scene-top #sample-value{font:12px ui-monospace,monospace}.chip{padding:4px 10px;background:#e4ece2;color:#4d7468;border-radius:6px;font-size:11px;letter-spacing:.06em}.scene-bottom{position:absolute;bottom:12px;left:17px;right:17px;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:10px;pointer-events:none}.scene-bottom button{font-size:10px;min-height:29px;padding:4px 7px;pointer-events:auto;background:#fffdf6e6}aside{display:flex;flex-direction:column;gap:16px}.mission{padding:17px 17px 13px;border-radius:13px;background:#e8ede2}.eyebrow{font-size:10px;letter-spacing:.1em;color:var(--muted);margin-bottom:7px}.mission h2{font-size:19px;font-weight:600}.mission p{font-size:12px;margin-top:8px;color:#60736c}.mission-progress{display:flex;align-items:baseline;gap:10px;margin-top:15px;font-size:11px;color:#637f71}.mission-progress span:first-child{font:25px ui-monospace,monospace;color:var(--teal)}.matrix{display:grid;gap:4px}.matrix span{font:12px/1.4 ui-monospace,monospace;background:#e5e9e0;text-align:center;padding:6px 3px;border-radius:4px}.matrix-label{font-size:10px;color:var(--muted);margin-bottom:5px}.value-line{margin-top:9px;font-size:11px;color:var(--muted)}.value-line b{color:var(--ink);font:12px ui-monospace,monospace;font-weight:400;display:block;overflow-wrap:anywhere;margin-top:3px}.test-row{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted);padding:6px 8px;border-top:1px solid var(--line)}.test-row>span:last-child{margin-left:auto}.test-row.pass{color:var(--teal)}.test-row.fail{color:var(--red)}footer{display:flex;align-items:center;gap:20px;padding-top:15px}.run{background:var(--ink);color:var(--paper);border:0;padding:11px 20px;flex-shrink:0;font-weight:500}.run span{font-size:11px;margin-right:8px}.feedback{font-size:12px;color:var(--muted)}.feedback.error{color:var(--red)}.feedback.success{color:var(--teal)}.node-label{position:absolute;transform:translate(-50%,-50%);pointer-events:auto;background:#fffdf6eb;border:1px solid #d9e0d5;padding:5px 9px;border-radius:7px;font-size:11px;line-height:1.35;white-space:nowrap;min-height:30px;cursor:grab;box-shadow:0 3px 12px #3c5c4b0c;touch-action:none}.node-label small{font-size:9px;display:block;color:var(--muted)}.node-label.selected{outline:2px solid var(--orange);outline-offset:1px}.port{position:absolute;transform:translate(-50%,-50%);pointer-events:auto;border:1.5px solid #899c91;background:var(--paper);border-radius:50%;min-width:27px;min-height:27px;padding:2px 4px;font:10px ui-monospace,monospace;box-shadow:0 2px 4px #51694a0d;touch-action:none}.port.input{border-radius:5px}.port.pending{background:#deac66;border-color:#bb8649}.port.connected{border-color:#51a494;background:#edf6eb}.port.bad{border-color:var(--red);background:#f6d7c9}.source-label{position:absolute;transform:translate(-50%,-50%);font-size:11px;color:var(--muted);white-space:nowrap;text-align:center;line-height:1.5}.source-label b{font-weight:500;color:var(--ink)}.packet{position:absolute;transform:translate(-50%,-50%);color:var(--paper);background:var(--teal);font:10px ui-monospace,monospace;padding:4px 6px;border-radius:5px;white-space:nowrap;pointer-events:none;box-shadow:0 4px 8px #446a6033;z-index:3}.node-value{position:absolute;transform:translate(-50%,-50%);font:10px ui-monospace,monospace;white-space:nowrap;background:#fffdf6d9;padding:2px 5px;color:#557b6f;border-radius:3px}.floating-help{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);font-size:12px;color:var(--muted);pointer-events:none}#loading{position:absolute;inset:0;display:flex;justify-content:center;align-items:center;gap:12px;background:var(--paper);z-index:10;color:var(--muted);font-size:13px}#loading[hidden]{display:none}.loader{width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--teal);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}dialog{max-width:580px;width:calc(100% - 35px);padding:30px;border:1px solid var(--line);border-radius:18px;background:var(--paper);color:var(--ink);box-shadow:0 25px 80px #162d2933}dialog::backdrop{background:#14252166;backdrop-filter:blur(4px)}dialog h2{font-size:22px}dialog p{font-size:13px;color:var(--muted);margin-top:15px;line-height:1.8}.close{float:right;font-size:20px;border:0;padding:0 6px;min-height:25px}.sources{font-size:11px}a{color:var(--teal)}@media(prefers-reduced-motion:reduce){.loader{animation:none}}

@media(min-width:851px){aside{height:calc(100vh - 225px);min-height:470px;max-height:850px;overflow-y:auto;scrollbar-width:thin;padding-right:3px}}

/* Desktop game workspace. No mobile-specific layout. */
body{min-width:1080px}#game{max-width:1920px;padding:18px 24px}main{grid-template-columns:minmax(0,1fr) 245px;gap:18px}.arena{background:radial-gradient(ellipse at 48% 35%,#fcfcf4 12%,#edf1e5 82%);box-shadow:inset 0 1px 0 #ffffff,0 12px 32px #5d786d0a}.scene-top{align-items:center}.scene-identity{display:flex;align-items:center;gap:13px}.scene-legend{display:flex;align-items:center;gap:5px;font-size:10px;color:#7b8e7f}.scene-legend i{width:6px;height:6px;background:#76a295;border-radius:50%;display:inline-block;margin-left:3px}.scene-legend i.warm{background:#c79868}.scene-controls{display:flex;flex-wrap:wrap;justify-content:flex-end;flex-shrink:0;max-width:65%;gap:7px;pointer-events:auto}.node-label{background:#fffef5f0;box-shadow:0 4px 12px #46695112;border-color:#cad7c7}.node-label.selected{background:#fff6e2}.node-value{box-shadow:0 2px 8px #416b5110}.port{box-shadow:0 3px 7px #3d5e4120}.packet{border:1px solid #b5d4bb66;background:#355c50ed;padding:5px 8px;transform:translate(-50%,-135%)}

.row-marker{position:absolute;transform:translate(-100%,-50%);padding:4px 7px;border-radius:5px;background:var(--row-color);color:#fffdf6;font-size:11px;font-weight:600;white-space:nowrap;box-shadow:0 3px 9px #344b3924;pointer-events:none}.row-marker::after{content:"";position:absolute;left:100%;top:50%;transform:translateY(-50%);border:5px solid transparent;border-right:0;border-left-color:var(--row-color)}
.packet{display:flex;align-items:center;gap:5px;background:#fffdf6b3;color:var(--ink);border:1px solid color-mix(in srgb,var(--row-color) 65%,transparent);padding:4px 7px;transform:translate(-50%,-115%);box-shadow:0 3px 9px #304a3d14}.packet-title{font:600 11px/1.3 -apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;color:var(--row-color)}.packet-values{font:11px/1.3 ui-monospace,monospace}.packet-morph{display:grid;align-items:center;white-space:nowrap}.packet-morph>.packet-values{grid-area:1/1;width:max-content}.packet[hidden]{display:none}
.focus-bar{position:absolute;top:14px;left:50%;transform:translateX(-50%);display:flex;gap:12px;align-items:center;background:#fffdf6ed;border:1px solid #c8d7c7;padding:6px 8px 6px 13px;border-radius:11px;box-shadow:0 5px 15px #41695113;font-size:12px;z-index:5}.focus-bar[hidden]{display:none}.focus-bar strong{font-weight:500}.focus-bar button{font-size:11px;min-height:28px;padding:4px 8px;background:#e8f0e3;border:0}.module-focused .scene-legend{display:none}.module-focused .node-label{cursor:grab;font-size:13px}.module-focused .port{font-size:13px;min-width:33px;min-height:33px}.module-focused .node-value{font-size:13px;padding:4px 7px}.module-focused .arena{border-color:#b7cbb6}
.module-focused .port:disabled{opacity:1;cursor:default}

#level-complete{max-width:440px;padding:30px 32px 28px;text-align:center;overflow:visible;background:radial-gradient(ellipse at 50% 0,#e7efe2,transparent 65%),var(--paper)}
#level-complete::backdrop{background:#14252133;backdrop-filter:blur(2px)}
#complete-close{position:absolute;right:13px;top:10px;color:var(--muted)}
.complete-seal{display:grid;place-items:center;width:54px;height:54px;margin:0 auto 15px;border:1px solid #98b6a3;border-radius:50%;background:#dce9d8;color:var(--teal);font:28px/1 sans-serif;box-shadow:0 0 0 6px #dce9d866}
#complete-level{margin-top:8px;color:var(--muted);font-size:12px}
#level-complete #complete-detail{margin-top:20px;color:var(--teal);font-size:14px}
#complete-reward{display:grid;gap:4px;padding:12px;margin-top:16px;border:1px solid #a7c5ae;border-radius:9px;background:#e6eee0;color:#377b67}#complete-reward[hidden]{display:none}#complete-reward small{font-size:11px;color:#65836f}#complete-reward strong{font-size:16px;font-weight:600}
#level-complete #complete-keep{margin-top:6px;font-size:12px;line-height:1.7}
.complete-actions{display:flex;gap:10px;margin-top:24px}.complete-actions button{flex:1;padding:10px 12px;font-size:13px}#complete-next{background:var(--teal);color:var(--paper);border-color:var(--teal)}
.repo-link{display:inline-flex;align-items:center;justify-content:center;gap:7px;flex-shrink:0;min-height:38px;padding:7px 10px;border:1px solid transparent;border-radius:8px;color:var(--muted);font-size:12px;line-height:1.4;text-decoration:none;white-space:nowrap}
.repo-icon{display:block;flex-shrink:0}.repo-external{font:12px/1 sans-serif;opacity:.65}
.repo-link:hover{color:var(--ink);border-color:var(--line);background:#fffdf6a6}.repo-link:focus-visible{outline:3px solid #deac66;outline-offset:3px}
.complete-community{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px 10px;margin-top:22px;padding-top:17px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}
.repo-star{color:#86652f;background:#f5efdf;border-color:#ded3b7}.repo-star:hover{color:#6f5022;background:#f0e5cd;border-color:#bc9a60}
.welcome-footer{position:absolute;z-index:2;left:9%;right:7%;bottom:5%;display:flex;align-items:center;justify-content:space-between;gap:20px}
.welcome-footer .welcome-edition{position:static}.welcome-footer .repo-link{font-size:11px}
@media(max-width:1200px){.welcome-footer{left:6%;right:6%}}
#level-complete[open]{animation:complete-in .18s ease-out}@keyframes complete-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
@media(prefers-reduced-motion:reduce){#level-complete[open]{animation:none}}

/* A collectible operator card. The illustration is the live 3D module. */
.module-card{--card-accent:#75628e;width:960px;max-width:calc(100vw - 80px);max-height:calc(100vh - 40px);padding:24px 28px 18px;overflow:auto;border:2px solid #b7a477;border-radius:17px;background:radial-gradient(ellipse at 0 0,#fffdf2,transparent 65%),repeating-linear-gradient(98deg,#a9955e03 0px,#a9955e03 1px,transparent 1px,transparent 5px),#f6f0df;box-shadow:0 0 0 5px #324038,0 0 0 6px #9e9270,0 30px 100px #0c171b88;color:#34403a;isolation:isolate}
.module-card[open]{animation:card-reveal .5s cubic-bezier(.17,.8,.25,1) both}.module-card::backdrop{background:#10201fd1;backdrop-filter:blur(7px)}
.module-card:before{content:"";position:absolute;inset:7px;border:1px solid #c8b98d;border-radius:10px;pointer-events:none;z-index:-1}
.card-sheen{position:absolute;inset:0;overflow:hidden;border-radius:15px;pointer-events:none;z-index:5}.card-sheen:after{content:"";position:absolute;inset:-80% -50%;background:linear-gradient(115deg,transparent 38%,#fff8d661 47%,transparent 57%);transform:translateX(80%);animation:card-glint .9s ease-out both}
.card-header{display:flex;align-items:center;gap:16px;padding:0 0 18px;border-bottom:1px solid #cabd98;position:relative}.card-seal{width:55px;height:66px;display:grid;place-items:center;flex-shrink:0;background:var(--card-accent);color:#fff8e0;font:32px/1 Georgia,"Songti SC","STSong",serif;clip-path:polygon(0 0,100% 0,100% 86%,50% 100%,0 86%);text-shadow:0 2px 3px #0003}.card-heading{flex:1}.card-kicker{font-size:10px;letter-spacing:.15em;color:#8b8066;display:flex;align-items:center;gap:12px}.card-kicker span:last-child{border:1px solid #c5b991;border-radius:3px;padding:0 5px;color:var(--card-accent);letter-spacing:.08em}.module-card h2{font:600 29px/1.4 Georgia,"Songti SC","STSong",serif;color:#2d3a34;letter-spacing:.09em;margin:3px 0 0}.card-heading>span{font:9px/1.5 ui-monospace,monospace;letter-spacing:.2em;color:#93866c}.card-number{align-self:flex-start;margin:7px 10px 0 0;color:#998968;font:12px Georgia,serif;letter-spacing:.1em}#card-close{width:30px;min-height:30px;padding:0;font-size:25px;font-weight:300;background:transparent;border-color:#c5b893;border-radius:50%;align-self:flex-start;line-height:26px;color:#807352}
.card-body{display:grid;grid-template-columns:43% minmax(0,1fr);gap:30px;padding:18px 0 16px}.card-illustration{min-width:0;display:flex;flex-direction:column}#card-portrait{height:292px;position:relative;overflow:hidden;border:1px solid #c7bb95;border-radius:100px 100px 10px 10px;background:radial-gradient(ellipse at 50% 47%,#fffdf4 0,#eee9d6 65%,#dce3d6 100%);box-shadow:inset 0 0 30px #a7956430}#card-portrait:before{content:"";position:absolute;width:66%;height:27%;left:17%;top:51%;background:#526a4d1b;border-radius:50%;filter:blur(12px)}#card-portrait:after{content:"";position:absolute;inset:10px;border:1px solid #ac9a7040;border-radius:90px 90px 4px 4px;pointer-events:none}.portrait-corner{position:absolute;width:35px;height:12px;z-index:2;pointer-events:none;border-top:1px solid #b0a078;left:calc(50% - 17px)}.portrait-corner.top{top:18px}.portrait-corner.bottom{bottom:12px}.card-model-tools{display:flex;align-items:center;justify-content:space-between;color:#8d8269;font-size:10px;padding:7px 3px}.card-model-tools button{font-size:10px;border:0;padding:1px 5px;min-height:22px;background:transparent;color:#7f765e}.card-stats{display:grid;grid-template-columns:1.05fr .85fr 1.25fr;border-top:1px solid #cdbf9c;border-bottom:1px solid #cdbf9c;padding:10px 0}.card-stats div{display:flex;flex-direction:column;gap:4px;align-items:center;border-right:1px solid #d7cdb4}.card-stats div:last-child{border-right:0}.card-stats span{font-size:9px;color:#99896e;letter-spacing:.08em}.card-stats b{font-size:12px;font-weight:500;color:var(--card-accent)}
.card-description{padding:2px 0;min-width:0}.card-ability{display:flex;align-items:center;gap:9px}.card-ability>span{font-size:10px;padding:2px 7px;border-radius:3px;background:var(--card-accent);color:#fff8e4;letter-spacing:.1em}.card-ability h3{font:600 18px/1.5 Georgia,"Songti SC","STSong",serif;color:var(--card-accent);letter-spacing:.03em}.module-card p{font-size:12px;line-height:1.8;color:#657064;margin:8px 0 0}.card-formula{font:17px/1.4 ui-monospace,monospace;color:var(--card-accent);background:#fffdf257;border-left:2px solid var(--card-accent);padding:10px 13px;margin:12px 0}.card-description h4{font-size:11px;letter-spacing:.05em;color:#706448;margin:0;font-weight:600}.card-description h4+p{margin-top:4px}.card-example{margin-top:12px;border-top:1px dashed #ccbf9e;padding-top:9px}.card-example-title{display:flex;justify-content:space-between;font-size:10px;color:#857756;gap:10px}.card-example-title>span{font:10px ui-monospace,monospace;color:#9a8c6f}.card-vector{display:flex;align-items:center;gap:9px;margin:5px 0}.card-vector>b{font:11px ui-monospace,monospace;width:15px;color:#7d7f70}.card-vector>span{display:flex;gap:4px;flex:1}.card-vector i{font:11px/1.4 ui-monospace,monospace;min-width:41px;padding:4px 6px;border:1px solid #d7d6c7;background:#eceee2;text-align:center;border-radius:3px;color:#617260}.card-vector.result i{background:color-mix(in srgb,var(--card-accent) 11%,#fff9e8);border-color:color-mix(in srgb,var(--card-accent) 35%,#fff9e8);color:var(--card-accent)}.card-vector i.negative{color:#a56841}.card-vector.result>b{color:var(--card-accent)}.card-example small{font-size:9px;color:#a0947b;display:block;margin-top:6px}.card-footer{border-top:1px solid #cabd98;padding-top:12px;display:flex;justify-content:space-between;align-items:center;gap:15px}.card-path>span{font-size:9px;color:#9a8c70;letter-spacing:.08em}#card-path{display:flex;align-items:center;gap:8px;font-size:10px;color:#9f9a87;margin-top:4px}#card-path i{font-style:normal;color:#baad90}#card-path .active{color:var(--card-accent);font-weight:600;text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--card-accent)}#card-return{font-size:11px;padding:8px 14px;border-radius:5px;border:1px solid #ad9e77;background:#eee5cc;color:#685d41;min-height:35px}#card-return span{margin-left:12px}.module-card .port{min-width:26px;min-height:26px;font-size:10px;background:#fffcf1;border-color:#ab9c78;box-shadow:0 2px 6px #4f5d3a1c}.module-card .node-value{font-size:10px}
@keyframes card-reveal{from{opacity:0;transform:perspective(1100px) translateY(30px) rotateY(-12deg) rotateZ(-2deg) scale(.88)}to{opacity:1;transform:perspective(1100px) translateY(0) rotateY(0) rotateZ(0) scale(1)}}@keyframes card-glint{from{transform:translateX(-65%)}to{transform:translateX(65%)}}
@media(prefers-reduced-motion:reduce){.module-card[open],.card-sheen:after{animation:none}.card-sheen{display:none}}

.module-card .card-vector>b{width:92px;flex-shrink:0;font-size:10px;white-space:nowrap}
.av-flow{margin-top:18px;padding:13px;border:1px solid #d1c6a9;border-radius:8px;background:#fffdf14d}.av-flow[hidden]{display:none}
.av-flow h4{margin:0 0 11px;font-size:12px;color:#706448}.av-branches{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.av-branches>div{display:flex;flex-direction:column;justify-content:space-between;gap:9px;padding:10px;border:1px solid;border-radius:6px}.av-branches small{font-size:11px;line-height:1.6}.av-branches b{font-size:13px}
.av-branches>.av-a{background:#f4ead5;border-color:#cdb788;color:#927035}.av-branches>.av-v{background:#e2eee4;border-color:#a6c7b5;color:#397f71}
.av-arrows{display:grid;grid-template-columns:repeat(2,1fr);text-align:center;font-size:22px;line-height:1.4;color:#a0977a}.av-arrows span:first-child{color:#a58a51}.av-arrows span:last-child{color:#5f9383}
.av-merge{width:max-content;max-width:100%;margin:0 auto;padding:10px 18px;border:1px solid #a6bfae;border-radius:6px;background:#edf0e1;text-align:center}.av-merge>b{font:600 17px ui-monospace,monospace}.av-merge>b span:first-child{color:#927035}.av-merge>b span:last-child{color:#397f71}.av-merge small{display:block;margin-top:5px;color:#587564;font-size:11px}.module-card .av-flow p{font-size:11px;margin-top:12px}
.av-table{border-collapse:collapse;table-layout:fixed;width:100%;font-size:11px;margin:10px 0}.av-table th,.av-table td{padding:9px 3px;border-bottom:1px solid #d4d4c1;text-align:center;vertical-align:middle}.av-table thead th{font-weight:500;color:#7b7460;font-size:10px;padding-top:3px}.av-table th:first-child{width:66px}.av-table th:nth-child(2),.av-table th:nth-child(4){width:16px}.av-table tbody th{font-size:14px;color:#927035}.av-table code{display:block;font:12px/1.6 ui-monospace,monospace;overflow-wrap:anywhere}.av-table .av-value{color:#397f71}.av-table .av-contribution{color:#536f61;background:#e6ecde8c}.av-operator{color:#999178}.av-word{display:block;font:11px/1.4 inherit;margin-bottom:3px}
.av-sum{padding:9px 11px;border-left:2px solid #648c77;background:#edf0e2;border-radius:0 5px 5px 0}.av-sum>b{display:block;font-size:11px;font-weight:500;color:#6b7567;margin-bottom:5px}.av-sum>code{font:12px/1.8 ui-monospace,monospace;overflow-wrap:anywhere;color:#687b68}.av-sum strong{color:#2d7563}
.av-actual{margin-top:13px;border-top:1px dashed #c7c3a6;padding-top:10px}.av-actual summary{font-size:12px;color:#587461;cursor:pointer}.av-actual summary:focus-visible{outline:2px solid #648b78;outline-offset:3px}.module-card .av-example-level{font-size:10px;color:#8b8065}.module-card .av-query{margin-top:12px}.av-query b{color:#397f71}.module-card .av-sources{font-size:11px;margin-top:2px}.av-actual .av-table code{font-size:11px}
.av-shape{margin-top:10px;padding:8px;border-radius:5px;background:#ede9d6}.av-shape>code{font-size:11px;color:#536d64;overflow-wrap:anywhere}.module-card .av-shape p{font-size:11px;margin-top:5px}
.wo-flow{display:grid;gap:10px}.wo-flow>div{padding:8px 10px;border-left:2px solid #b8aa81;background:#f2ecdb;border-radius:0 5px 5px 0}.wo-flow>div:last-child{border-color:var(--card-accent);background:#e6ede1}.wo-flow code{font:600 12px/1.5 ui-monospace,monospace;color:#65775f}.module-card .wo-flow p{margin:3px 0 0;font-size:11px}
.wo-example{margin-top:9px}.module-card .wo-vector{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 10px;border:1px solid #d0d2be;border-radius:5px;background:#eceee2;margin:8px 0}.wo-vector>b{font-size:12px;font-weight:600;white-space:nowrap}.wo-vector>code{font:600 13px/1.6 ui-monospace,monospace;overflow-wrap:anywhere}.module-card .wo-vector.result{border-color:#a6bfae;background:#e2ebe0;color:var(--card-accent)}
.wo-columns{display:grid;gap:7px}.wo-column{display:grid;grid-template-columns:106px minmax(0,1fr);gap:12px;align-items:center;padding:9px 10px;border:1px solid #d3ceb8;border-radius:5px;background:#fffdf180}.wo-column>div{min-width:0;border-right:1px solid #d9d2bc;padding-right:9px}.wo-column b{display:block;font-size:11px;color:var(--card-accent)}.wo-column small{margin:3px 0;font-size:9px;color:#8b7e60}.wo-column>div>code{display:block;font:10px/1.6 ui-monospace,monospace;overflow-wrap:anywhere;color:#7d735d}.wo-equation{font:12px/1.9 ui-monospace,monospace;color:#61705e}.wo-equation>span{white-space:nowrap}.wo-equation strong{color:var(--card-accent);font-size:14px;white-space:nowrap}
.module-card .wo-example>p:not(.wo-vector){font-size:11px;line-height:1.7}.wo-full,.wo-heads{margin-top:10px;padding-top:9px;border-top:1px dashed #ccc6ad}.wo-example summary{font-size:11px;line-height:1.6;color:#587461;cursor:pointer}.wo-example summary:focus-visible{outline:2px solid #648b78;outline-offset:3px}.module-card .wo-full>p{font-size:10px;color:#8b8065}.module-card .wo-heads>p{font-size:11px}.wo-full table{border-collapse:collapse;table-layout:fixed;width:100%;margin:8px 0;font-size:11px}.wo-full th,.wo-full td{padding:7px 4px;text-align:center;border-bottom:1px solid #d5d5c4;vertical-align:middle}.wo-full th{font-weight:500;color:#7b7460}.wo-full th:first-child{width:42px}.wo-full tbody th{font-size:13px}.wo-full code{font:11px/1.6 ui-monospace,monospace;overflow-wrap:anywhere}.wo-full td:last-child{color:var(--card-accent);background:#e6ecde80}
.score-shapes>code{display:block;margin-bottom:5px;font-size:11px;color:#516f79}
.score-dimension{padding:7px 9px;background:#ede9d6;border-radius:5px}.score-dimension code{white-space:nowrap}
.score-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:10px}
.score-pair>div{padding:8px;border:1px solid #acbdc9;border-radius:5px;background:#e5ecf0;color:#446c8f}
.score-pair .key{border-color:#c1b4ce;background:#eee8f1;color:#78608c}
.score-pair b{display:block;font-size:10px;margin-bottom:5px}.score-pair code{font-size:12px;overflow-wrap:anywhere}
.score-worked{margin:8px 0;font:11px/1.8 ui-monospace,monospace;color:#617462;overflow-wrap:anywhere}
.score-table{border-collapse:collapse;width:100%;font-size:11px;margin:10px 0 14px}
.score-table th{font-weight:500;color:#7b7460}.score-table td,.score-table th{padding:6px;text-align:right;border-bottom:1px solid #d5d5c4}
.score-table th:first-child{text-align:left}.score-table td:last-child{color:#397f71;font-weight:600}.score-table .worked{background:#e8ecdf80}
.score-softmax{border-top:1px dashed #c8c5ad;padding-top:10px}.score-distributions{display:grid;grid-template-columns:48px repeat(2,minmax(0,1fr));gap:5px 8px;align-items:center;margin-top:9px;font-size:10px;color:#6b7466}
.score-distributions>b{font-weight:500;text-align:center}.score-bar{position:relative;min-height:23px;background:#e5e6dc;border-radius:4px;overflow:hidden;text-align:center;line-height:23px}
.score-bar i{position:absolute;inset:0 auto 0 0;background:#b9a5c2;opacity:.65}.score-bar.after i{background:#82ae99}.score-bar span{position:relative;color:#334d43;font-variant-numeric:tabular-nums}
.score-shortcut{padding:8px 10px;margin-top:10px;background:#eeecd9;border-radius:5px;font-size:10px;color:#736b54}.score-shortcut code{display:block;font-size:11px;line-height:1.7;margin-top:5px}
.score-theory,.score-full{margin-top:10px;padding-top:9px;border-top:1px dashed #ccc6ad}
.score-theory summary,.score-full summary{font-size:11px;color:#587461;cursor:pointer}.score-theory summary:focus-visible,.score-full summary:focus-visible{outline:2px solid #648b78;outline-offset:3px}
.card-comparison .card-vector{--branch:#397f71}
.card-comparison .card-vector[data-symbol="G"],.card-comparison .card-vector[data-symbol="S"]{--branch:#75628e}
.module-card .card-comparison .card-vector>b{width:106px;white-space:normal;color:var(--branch);line-height:1.4}
.card-comparison .card-vector i.example-focus{border-color:var(--branch);background:color-mix(in srgb,var(--branch) 15%,#fff9e8);box-shadow:0 0 0 1px var(--branch);font-weight:700;color:var(--branch)}
.module-card .card-example-focus{font-size:10px;color:#857756;margin:8px 0 6px}
.card-gate-step{margin:8px 0 5px;color:#75628e;font:11px/1.6 ui-monospace,monospace}
.card-gate-result{display:flex;align-items:center;justify-content:center;gap:13px;border-radius:6px;padding:7px 10px;background:#ffffff70;border:1px solid #d7cfb8}
.card-gate-result>span{text-align:center;color:#397f71}.card-gate-result>span[data-role="scale"]{color:#75628e}
.card-gate-result small{margin:0 0 3px;color:inherit;font-size:10px}.card-gate-result b{font:600 15px/1.3 ui-monospace,monospace}
.card-gate-result>i{font:14px ui-monospace,monospace;color:#8b826c}
.module-card .card-silu-example .card-vector>b{width:106px;white-space:normal;line-height:1.4}
.card-silu-example .card-vector>span,.card-silu-link>span{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px}
.card-silu-example .card-vector i.example-focus{border-color:var(--card-accent);background:color-mix(in srgb,var(--card-accent) 15%,#fff9e8);box-shadow:0 0 0 1px var(--card-accent);font-weight:700}
.card-silu-link{display:grid;grid-template-columns:106px minmax(0,1fr);gap:9px;align-items:center;color:var(--card-accent)}
.card-silu-link>b{font:600 11px ui-monospace,monospace}.card-silu-link i{text-align:center;font:16px/1.2 sans-serif;opacity:.4}.card-silu-link i.example-focus{opacity:1;font-weight:700}
.card-silu-worked{margin-top:9px;padding:8px 10px;border-left:2px solid var(--card-accent);background:#fffdf280;border-radius:0 5px 5px 0}
.card-silu-worked small{margin:0 0 5px}.card-silu-worked code{font:12px/1.8 ui-monospace,monospace;color:var(--card-accent)}
.card-layernorm-steps{display:grid;gap:6px}.card-layernorm-steps>b{font-size:12px}.card-layernorm-steps>code{display:block;overflow-wrap:anywhere}
.module-card .card-silu-use{font-size:10px;margin:9px 0 5px;color:#857756}
#mission-reason[hidden],#mission-reason [hidden]{display:none}#mission-reason{margin-top:13px;padding-top:11px;border-top:1px solid #cbd6c5}
#mission-reason summary{font-size:12px;font-weight:600;color:var(--ink);cursor:pointer;padding:4px 0;line-height:1.6}#mission-reason summary:focus-visible,.level-group-details>summary:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:4px}#mission-reason p{font-size:12px;line-height:1.7;margin-top:8px}
#mission-reason-text{white-space:pre-line}
.embedding-width-example{display:grid;gap:9px;padding:9px;border:1px solid #d0ddc8;border-radius:7px;background:#ffffff78}.embedding-width-example small{display:block;margin-bottom:5px;font-size:10px;color:#61796b}.embedding-lookup{display:flex;align-items:center;gap:8px}.embedding-lookup>b{min-width:22px;color:#386758;font-size:12px}.embedding-lookup>span{color:#819183}.embedding-coordinates{display:flex;gap:4px}.embedding-coordinates>span{display:grid;place-items:center;min-width:31px;height:29px;padding:0 4px;border:1px solid color-mix(in srgb,var(--feature-color) 35%,#fff);border-bottom:3px solid var(--feature-color);border-radius:4px;background:color-mix(in srgb,var(--feature-color) 9%,#fff);color:var(--feature-color);font:11px ui-monospace,monospace}
#mission-reason-example{margin-top:9px}#mission-reason-example table{width:100%;border-collapse:collapse}
#mission-reason-example caption{text-align:left;margin-bottom:7px;font-size:10px;line-height:1.6;color:#60736c}
#mission-reason-example th{text-align:left;font-size:9px;font-weight:500;color:#718477;padding-bottom:5px}#mission-reason-example td{padding:5px 0;border-top:1px solid #d3decd;font:10px/1.5 ui-monospace,monospace;white-space:nowrap}
#mission-reason-example [data-factor="scale"]{color:#75628e}#mission-reason-example strong{color:#397f71}
#mission-reason-scope{display:block;margin-top:8px;font-size:10px;line-height:1.6;color:#758278}
.encoder-primer{display:grid;gap:9px}
.encoder-job{padding:10px;border:1px solid #becfc0;border-radius:9px;background:#f6f8ef}
.encoder-job h4{display:flex;align-items:center;gap:6px;margin:0;color:#346f65;font-size:11px;line-height:1.5}
.encoder-job h4>span{display:grid;place-items:center;flex:0 0 19px;height:19px;border-radius:50%;background:#dcebe0;font:11px ui-monospace,monospace}
.encoder-job>small{display:block;margin:4px 0 0 25px;font-size:10px;color:#768879}
.encoder-job svg{display:block;width:100%;height:auto;margin-top:9px;overflow:visible;color:#43897a}
.encoder-job svg path{fill:none;stroke:currentColor;stroke-width:1;opacity:.17}
.encoder-job svg path.emphasized{stroke-width:1.7;opacity:.75}
.encoder-job svg text{fill:#405d53;font:10px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.encoder-job svg rect{fill:currentColor}
.encoder-job[data-encoder-job=process]{border-color:#d0c8d7;background:#f5f2f5}
.encoder-job[data-encoder-job=process] h4,.encoder-job[data-encoder-job=process] svg{color:#846990}
.encoder-job[data-encoder-job=process] h4>span{background:#e8e0eb}
.encoder-job[data-encoder-job=process] svg path{stroke-width:2;opacity:.65}
.encoder-pattern{display:grid;gap:5px;padding:8px 0;font-size:10px;line-height:1.6;color:#5d7766}
.encoder-pattern>b{font-weight:600}.encoder-pattern>span{font-size:10px}
.encoder-formulas{padding-top:8px;border-top:1px solid #cad7c4}
.encoder-formulas summary{cursor:pointer;font-size:11px;color:#567361}
.encoder-formulas code{display:block;margin-top:4px;font:10px/1.6 ui-monospace,monospace;color:#386e61;overflow-wrap:anywhere}
.package-primer{margin-top:9px;border:1px solid #cbd6c5;border-radius:6px;padding:8px;background:#f4f5ea80}
.package-primer>summary{cursor:pointer;font-size:11px;line-height:1.6;color:#365a4d;font-weight:600}
.package-primer>summary:focus-visible{outline:2px solid #648b78;outline-offset:3px}
.package-diagram{display:grid;justify-items:center;gap:3px;margin:10px 0 6px}
.package-stage{display:flex;flex-wrap:wrap;justify-content:center;gap:5px;max-width:100%}
.package-stage>span{padding:5px 9px;background:#e5ecdd;border:1px solid #b9cdbd;border-radius:5px;font:11px/1.45 ui-monospace,monospace;color:#365a4d;overflow-wrap:anywhere;text-align:center}
.package-arrow{font-size:12px;line-height:1;color:#839b87}
.attention-package{width:100%;gap:5px}.attention-package .heads-input,.attention-package .heads-roles{justify-self:stretch;font-size:11px;line-height:1.65;margin:2px 0 6px}
.attention-heads{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;width:100%}.attention-package[data-head-count="1"] .attention-heads,.package-primer .attention-heads{grid-template-columns:1fr}
.attention-head{--head-tone:#507f9e;--head-fill:#e7eef1;min-width:0;padding:8px;border:1px solid color-mix(in srgb,var(--head-tone) 38%,#eee7d5);border-radius:7px;background:var(--head-fill)}.attention-head[data-head="2"]{--head-tone:#856b9a;--head-fill:#eee8f0}
.attention-head>header{display:flex;justify-content:space-between;align-items:center;gap:5px;margin-bottom:8px;color:var(--head-tone)}.attention-head>header>b{font-size:11px;font-weight:600}.attention-head>header>small{font-size:9px;white-space:nowrap}
.head-paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:5px;align-items:start}.head-projection,.head-step{text-align:center;border:1px solid #c2cec1;border-radius:4px;background:#fffdf5;padding:5px 3px;min-width:0}.head-projection small,.head-step small{display:block;font-size:9px;line-height:1.4;color:#627568}.head-projection code,.head-step code{display:block;margin-top:3px;font:600 11px/1.5 ui-monospace,monospace;color:#365a4d;overflow-wrap:anywhere}.head-projection{border-color:color-mix(in srgb,var(--head-tone) 40%,white)}.head-projection code{font-size:13px;color:var(--head-tone)}
.head-matching{grid-column:1/3;display:grid;justify-items:center;gap:4px;min-width:0}.head-matching .head-step{box-sizing:border-box;width:100%}.head-matching code{font-size:10px}.head-qk-join{color:var(--head-tone);font-size:15px;line-height:1.4}.head-value-path{align-self:stretch;display:flex;flex-direction:column;align-items:center;color:var(--head-tone);padding:6px 0;gap:4px;text-align:center}.head-value-path>span:first-child{width:1px;flex:1;min-height:25px;background:currentColor;opacity:.6}.head-value-path>code{font:600 12px ui-monospace,monospace}.head-value-path>small{font-size:9px;line-height:1.4}.head-value-path>span:last-child{font-size:17px;line-height:1}
.head-paths>[data-head-step="mix"]{grid-column:1/-1;border-color:var(--head-tone);background:color-mix(in srgb,var(--head-fill) 55%,white)}.attention-package>.head-step{padding:6px 12px}.head-rejoin{color:#839b87;font-size:16px;line-height:1}.attention-package .heads-roles{margin:6px 0 0;padding-top:7px;border-top:1px solid #cbd6c5}
#card-package{margin:12px 0;padding:10px 12px;border:1px solid #cbd6c5;border-radius:6px;background:#f5f4e780}
#card-package[hidden]{display:none}.package-note{font-size:11px;line-height:1.65;color:#657064}
.swiglu-primer{padding:10px;border:1px solid #cbd8c6;border-radius:8px;background:#fffdf666}.swiglu-primer h4{margin:0;font-size:11px;font-weight:600;color:#365a4d}
.swiglu-source{margin-top:10px;text-align:center;font-size:10px;color:#60736c}.swiglu-source::after{content:"↙　↘";display:block;color:#91a58f;font-size:12px;line-height:1.2}
.swiglu-branches{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:4px}.swiglu-branches>div{display:flex;flex-direction:column;justify-content:center;gap:3px;padding:7px 4px;border-radius:5px;background:#dce9dc;text-align:center;color:#397f71}
.swiglu-branches>.swiglu-gate{background:#e7dfeb;color:#75628e}.swiglu-branches b{font-size:10px;font-weight:600;line-height:1.5}.swiglu-branches span{font-size:9px}
.swiglu-merge{display:flex;flex-direction:column;align-items:center;gap:3px;margin-top:4px}.swiglu-merge>span{color:#91a58f;font:13px/1 sans-serif}.swiglu-merge b{font-size:10px;font-weight:500;color:#456d5a}
.residual-example{padding:7px 9px;border-radius:6px;background:#ffffff70}.residual-example>div{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:4px 0;font-size:10px}.residual-example code{font:11px/1.5 ui-monospace,monospace}.residual-example [data-role="baseline"],.card-add-example [data-symbol="X"],.card-add-example [data-symbol="R"]{--branch:#397aa2;color:var(--branch)}.residual-example [data-role="update"],.card-add-example [data-symbol="F"]{--branch:#98702e;color:var(--branch)}.residual-example [data-role="result"],.card-add-example [data-symbol="Y"]{--branch:#397f71;color:var(--branch)}.residual-example>small{display:block;margin-top:4px;padding-top:5px;border-top:1px solid #d3decd;font:11px/1.5 ui-monospace,monospace;color:#397f71}
.module-card .card-add-example .card-vector>b{width:106px;white-space:normal;color:var(--branch);line-height:1.4}.card-add-example .card-vector>span{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}.card-add-example .card-vector i.example-focus{color:var(--branch);border-color:var(--branch);box-shadow:0 0 0 1px var(--branch);font-weight:700}
.card-add-step{margin-top:9px;padding:8px 10px;border-left:2px solid var(--card-accent);background:#fffdf280;border-radius:0 5px 5px 0}.card-add-step small{margin:0 0 4px}.card-add-step code{font:600 14px/1.6 ui-monospace,monospace;color:#397f71}.card-add-step [data-role="baseline"]{color:#397aa2}.card-add-step [data-role="update"]{color:#98702e}.module-card .card-add-zero{font-size:10px;line-height:1.8;margin:8px 0 0;color:#706448}.card-add-zero code{white-space:nowrap;font-size:11px}

/* A rejected wire is explained beside its input, without intercepting the next attempt. */
.connection-toast{position:absolute;box-sizing:border-box;width:max-content;max-width:min(290px,calc(100% - 24px));padding:10px 13px;border:1px solid #c5886e;border-radius:8px;background:#fff8ec;color:#844832;box-shadow:0 6px 20px #65412d25;z-index:9;pointer-events:none;animation:connection-toast-in .16s ease-out,connection-toast-out .22s ease-in 3.38s forwards}
.connection-toast strong{display:block;font-size:13px;margin-bottom:4px}.connection-toast>span{font-size:13px;line-height:1.6;overflow-wrap:anywhere}
.connection-toast:after{content:"";position:absolute;left:var(--tip-x);width:8px;height:8px;background:#fff8ec;transform:translateX(-50%) rotate(45deg)}
.connection-toast[data-side=above]:after{bottom:-5px;border-bottom:1px solid #c5886e;border-right:1px solid #c5886e}.connection-toast[data-side=below]:after{top:-5px;border-top:1px solid #c5886e;border-left:1px solid #c5886e}
.port.rejected,.port.rejected:hover{border-color:#bc7053;box-shadow:0 0 0 3px #bc705337;background:#fff0e4}
@keyframes connection-toast-in{from{opacity:0;transform:translateY(3px)}to{opacity:1;transform:translateY(0)}}
@keyframes connection-toast-out{to{opacity:0}}
@media(prefers-reduced-motion:reduce){.connection-toast{animation:none}}

/* Compare results only at the final outlet, after the run has completed. */
.fault-pin{position:absolute;transform:translate(-50%,-50%);display:grid;place-items:center;width:24px;height:24px;border:2px solid #fff8ec;border-radius:50%;background:#b65b48;color:#fff8ec;box-shadow:0 0 0 4px #b65b4828;font:bold 13px ui-monospace,monospace;z-index:5;pointer-events:none}
.local-fault{position:absolute;min-width:225px;max-width:310px;padding:11px 14px;background:#fffcf4f7;border:1px solid #cf9a86;border-left:3px solid #b65b48;border-radius:8px;box-shadow:0 8px 24px #5e3b2c24;color:#824b3e;z-index:5;pointer-events:none;animation:fault-in .18s ease-out}
.local-fault .fault-close{position:absolute;right:5px;top:4px;width:28px;height:28px;min-height:0;padding:0;display:grid;place-items:center;border:0;border-radius:5px;background:transparent;color:#824b3e;font:22px/1 sans-serif;pointer-events:auto;cursor:pointer}.local-fault .fault-close:hover{background:#f3e6db}.local-fault .fault-close:focus-visible{outline:2px solid #824b3e;outline-offset:1px}.local-fault strong{padding-right:24px}
.local-fault strong{font-size:11px;font-weight:600;display:block;margin-bottom:7px}.local-fault div{display:flex;gap:12px;align-items:baseline;margin-top:5px;font-size:10px;color:#8c6a60}.local-fault div>span{min-width:22px}.local-fault b{font:12px/1.5 ui-monospace,monospace;overflow-wrap:anywhere;color:#9b493b}.local-fault .expected b{color:#456e61}.local-fault p{font-size:11px;color:#8c6a60;max-width:240px;margin:0}.fault-pin[hidden],.local-fault[hidden]{display:none}
@keyframes fault-in{from{opacity:0;margin-top:6px}to{opacity:1;margin-top:0}}
.local-fault .fault-precision-note{margin-top:8px;font-size:10px;line-height:1.5}
@media(prefers-reduced-motion:reduce){.local-fault{animation:none}}

/* Each chapter keeps its own small workbench and saved wiring. */
#levels-open{margin-left:auto;font-size:12px;padding:6px 14px}#about-open{margin-left:0}#next-level{margin-left:auto;flex-shrink:0;background:#e4eee0;color:#367763;border-color:#b5cbb7;font-size:12px}#next-level[hidden]{display:none}
#level-menu{width:630px;max-width:calc(100vw - 60px);padding:26px 30px;background:#faf8ef}#level-menu h2{font-family:Georgia,"Songti SC",serif;letter-spacing:.05em}.level-menu-intro{margin-top:8px!important;font-size:12px!important}#level-list{display:grid;gap:12px;margin-top:22px}.level-choice{display:flex;flex-direction:column;gap:7px;align-items:flex-start;text-align:left;padding:16px 19px;min-height:118px;background:#fffdf6;border-color:#d5dbc9;position:relative}.level-choice.current{border-color:#70a293;background:#edf2e7}.level-choice-top{display:flex;justify-content:space-between;width:100%;font-size:10px;color:#7b8b7c;letter-spacing:.06em}.level-choice-top>span:last-child{color:#398576}.level-choice strong{font:600 19px/1.4 Georgia,"Songti SC",serif;color:#2f5148}.level-choice>span:not(.level-choice-top){font-size:12px;color:#6e7e70}.level-choice small{font-size:10px;color:#8d9989}.level-choice.track-finale{border-top:3px solid #b5a174}.level-choice.track-finale strong{color:#6b5a39}

.scene-legend[hidden]{display:none}

/* Learning campaign, same desk and collectible operator language. */
#level-menu{width:940px;max-height:calc(100vh - 50px);padding:0;overflow:hidden}#level-menu[open]{display:flex;flex-direction:column}.level-menu-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-shrink:0;padding:26px 30px 16px;border-bottom:1px solid var(--line)}#levels-close{float:none;flex-shrink:0;width:34px;min-height:34px;border:1px solid var(--line);background:var(--paper);border-radius:8px}.level-menu-content{min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:0 30px 26px}#level-list{grid-template-columns:repeat(2,minmax(0,1fr))}.level-choice{min-height:145px}.level-choice>span:not(.level-choice-top){line-height:1.6}.level-choice.track-finale{border-top:3px solid #b5a174}.port{font-size:9px}.device-badge{position:absolute;transform:translate(-50%,-50%);pointer-events:auto;padding:2px 7px;min-height:23px;border-radius:4px;font:10px ui-monospace,monospace;cursor:grab;background:#eee6d4;z-index:2}.device-gpu{background:#e4eee7;color:#398775}.device-ane{background:#e8e0ef;color:#806299}#device-docks{position:absolute;bottom:45px;left:50%;transform:translateX(-50%);display:flex;gap:14px;z-index:4;padding:8px;border-radius:12px;background:#f7f5e9ed;border:1px solid #c6d1c1}#device-docks[hidden]{display:none}#device-docks button{display:flex;gap:5px;flex-direction:column;min-width:140px;min-height:52px;border:1px dashed #afbfaf;background:#fdfbef;color:#536958}#device-docks b{font:13px ui-monospace,monospace}#device-docks span{font-size:9px}#device-docks [data-device=ane]{border-color:#ab96b9;color:#806299}#device-docks [data-device=gpu]{border-color:#80afa2;color:#398775}.engine-level .scene-legend{display:none}#engine-controls{padding:8px}#engine-controls label{display:block;margin:10px 0;font-size:11px;color:#657b70}#engine-controls select{width:100%;margin-top:5px;padding:7px;border:1px solid #bdcdbb;border-radius:6px;background:#fffdf6;color:#344b40;font:11px inherit}.engine-model-note{font-size:10px;color:#89978b;line-height:1.7}/* Run results share the toolbar; their content never resizes the scene. */
.run-toolbar{position:relative;min-height:60px;flex-wrap:nowrap;gap:14px}
.run-toolbar .view-sliders{display:grid;gap:0;padding-left:14px;border-left:1px solid var(--line);flex-shrink:0}
.run-toolbar .view-sliders>div{display:grid;grid-template-columns:40px 26px 112px 26px 42px;align-items:center;gap:8px;min-height:26px;white-space:nowrap;font-size:11px;color:var(--muted)}
.playback-control{display:flex;align-items:center;gap:8px;flex-shrink:0;white-space:nowrap;font-size:11px;color:var(--muted)}
.view-sliders .playback-caption{color:#52796d;margin-right:2px}
#playback-rate,#camera-zoom-rate{min-width:34px;color:#52796d;font:11px ui-monospace,monospace;text-align:right;font-variant-numeric:tabular-nums}
:is(#playback-speed,#camera-zoom){appearance:none;-webkit-appearance:none;width:112px;height:26px;margin:0;background:transparent;cursor:pointer;accent-color:var(--teal);border-radius:6px;direction:ltr}
:is(#playback-speed,#camera-zoom)::-webkit-slider-runnable-track{height:4px;background:#cbd9cc;border-radius:4px}
:is(#playback-speed,#camera-zoom)::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:15px;height:15px;margin-top:-5.5px;border:2px solid var(--paper);border-radius:50%;background:var(--teal);box-shadow:0 0 0 1px #87ada0}
:is(#playback-speed,#camera-zoom)::-moz-range-track{height:4px;background:#cbd9cc;border-radius:4px}
:is(#playback-speed,#camera-zoom)::-moz-range-thumb{width:11px;height:11px;border:2px solid var(--paper);border-radius:50%;background:var(--teal);box-shadow:0 0 0 1px #87ada0}
:is(#playback-speed,#camera-zoom):focus-visible{outline:2px solid #deac66;outline-offset:3px}
.run-toolbar .feedback{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#run-report{display:flex;align-items:center;gap:6px;flex:1 1 300px;min-width:0;height:44px;margin:0;padding:0 0 0 14px;border:0;border-left:1px solid var(--line);background:transparent;color:#657b70}
#run-report[hidden]{display:none}
.run-report-content{flex:1;min-width:0;max-height:100%;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;font-size:11px;line-height:1.6}
.run-report-content:focus-visible{outline:2px solid #deac66;outline-offset:-2px;border-radius:3px}
#run-report h3{font-size:11px;margin:8px 0 3px;color:#52796d}
#run-report h3:first-child{margin-top:0}
#run-report p{font-size:11px;line-height:1.6;color:#657b70;margin:0}
#run-report .report-close{flex-shrink:0;font-size:18px;line-height:1;min-height:26px;width:26px;padding:0;border:0;background:transparent;color:var(--muted)}
#run-report .report-close:hover{background:#e4ece2}
#run-report .word-trials{flex-wrap:wrap;gap:8px;margin:0}
#run-report .word-trials>div{min-width:0;overflow-wrap:anywhere;gap:1px;padding:0 8px 0 0;background:none;border-radius:0}
#run-report .word-trials strong{font:600 13px/1.4 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;letter-spacing:0}
#run-report .word-trials small,#run-report .word-trials span{font-size:10px}
#run-report .metric-grid{gap:5px;grid-template-columns:repeat(auto-fit,minmax(110px,1fr))}
#run-report .metric-grid>div{padding:5px 8px;gap:1px}
#run-report .metric-grid strong{font-size:15px}
#run-report .attention-map>div{font-size:10px}
#run-report .attention-map span{padding:3px}
#run-report .campaign-complete{margin-top:8px;padding:8px}
#run-report .campaign-complete h3{font-size:13px!important;margin:0!important}
.word-trials{display:flex;gap:18px;margin-top:10px}.word-trials>div{display:flex;flex-direction:column;gap:5px;background:#eef1e5;padding:14px 22px;border-radius:8px}.word-trials strong{font:600 30px/1.5 Georgia,"Songti SC",serif;letter-spacing:.18em}.word-trials small,.word-trials span{font-size:11px;color:#788577}.good{color:#348471}.bad{color:#b65f46}.metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(125px,1fr));gap:10px}.metric-grid>div{padding:12px 15px;border:1px solid #d9e1d2;border-radius:9px;display:flex;flex-direction:column;gap:5px}.metric-grid .bad{background:#fbede3;border-color:#dbaf96}.metric-grid .good{background:#edf3e8}.metric-grid small,.metric-grid span{font-size:10px}.metric-grid strong{font:23px ui-monospace,monospace}.metric-grid em{font:10px inherit}.runtime-timeline{display:flex;gap:3px;margin-top:16px;min-height:75px;overflow:auto}.runtime-timeline>div{min-width:60px;padding:10px 7px;display:flex;flex-direction:column;justify-content:space-between;background:#e7e8dc;border-radius:5px;gap:5px}.runtime-timeline .lane-gpu{background:#d4e7dd}.runtime-timeline .lane-ane{background:#e0d7e8}.runtime-timeline .lane-gpu\+ane{background:linear-gradient(115deg,#d4e7dd,#e0d7e8)}.runtime-timeline .lane-memory{background:#ead6bf}.runtime-timeline b{font-size:10px}.runtime-timeline span,.runtime-timeline small{font-size:9px}.attention-map{display:grid;gap:5px;max-width:700px}.attention-map>div{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:5px;align-items:center;font-size:12px}.attention-map span{padding:10px;background:color-mix(in srgb,#4d9b86 calc(var(--weight)*80%),#edf2e5);border-radius:5px;color:#2b4b40}.token-verdict{font-size:15px!important;margin-bottom:10px!important}.module-card .card-vector>span{flex-wrap:wrap}.module-card .card-vector i{min-width:33px}.local-fault{max-width:330px;max-height:240px;overflow:auto;pointer-events:auto}.engine-level .arena{min-height:590px}
#mission-limits{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}#mission-limits:empty{display:none}#mission-limits span{font-size:10px;padding:3px 6px;background:#fffdf680;border:1px solid #ccd8c4;border-radius:4px;color:#527563}.vocab-scores{display:grid;gap:5px;max-width:650px}.vocab-scores>div{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}.vocab-scores b,.vocab-scores span{text-align:center;padding:6px;font:12px ui-monospace,monospace;background:#f1f1e7;border-radius:4px}.vocab-scores .winner{background:#c9e1cf;color:#277958;font-weight:600}.device-badge.processing{box-shadow:0 0 0 4px #e6be665e;outline:2px solid #c99746;animation:device-pulse .55s ease-in-out infinite alternate}@keyframes device-pulse{to{filter:brightness(1.22)}}@media(prefers-reduced-motion:reduce){.device-badge.processing{animation:none}}.test-row{overflow-wrap:anywhere}.test-row>span:first-child{max-width:48%}
.campaign-complete{margin-top:22px;padding:23px 28px;border:1px solid #b9cbae;border-radius:12px;background:linear-gradient(120deg,#e6efdc,#faf2d9)}.campaign-complete>span{font-size:10px;letter-spacing:.12em;color:#69825c}.campaign-complete h3{font:600 22px Georgia,"Songti SC",serif!important;color:#3c6654!important;margin:10px 0!important}.campaign-complete p{max-width:760px}

.connection-guide{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.connection-guide[hidden]{display:none}.connection-guide path{fill:none;stroke:#418f83;stroke-width:2;stroke-linecap:round;stroke-dasharray:8 12;stroke-opacity:.55;animation:connection-drift 1.6s linear infinite}@keyframes connection-drift{to{stroke-dashoffset:-40}}@media(prefers-reduced-motion:reduce){.connection-guide path{animation:none}}

/* A small game shell: settings stay off the workbench. */
#settings-open{display:flex;gap:6px;align-items:center;font-size:12px;padding:6px 13px}#settings-open>span{font-size:17px}
#settings{width:450px;padding:30px 32px 23px;border:1px solid #c4d0bd;border-radius:18px;background:#faf8ef;box-shadow:0 24px 80px #273e3c40}#settings::backdrop{background:#203f3b5c;backdrop-filter:blur(5px)}#settings h2{font:600 28px/1.3 Georgia,"Songti SC",serif;margin:9px 0 27px;color:#355b50}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:21px 0;border-top:1px solid #dce1d2}.setting-label{display:flex;flex-direction:column;gap:4px}.setting-label>label,.setting-label>span:first-child{font-size:14px;font-weight:600;color:#3f6054}.setting-label>span:not(:first-child){font-size:11px;color:#839084}.setting-row select{font:12px inherit;color:#3c6255;background:#fffdf6;border:1px solid #cad5c3;border-radius:8px;padding:9px 11px;max-width:170px}.setting-switch{width:43px;height:25px;min-height:25px;padding:3px;border:0;border-radius:20px;background:#acb6aa;flex-shrink:0;transition:background .18s}.setting-switch>span{display:block;width:19px;height:19px;border-radius:50%;background:#fffdf6;box-shadow:0 1px 4px #283c3929;transition:transform .18s}.setting-switch[aria-checked=true]{background:#408f7b}.setting-switch[aria-checked=true]>span{transform:translateX(18px)}.volume-row{font-size:12px;color:#748476;padding:0 0 23px;border-top:0;gap:15px}.volume-row input{flex:1;min-width:80px;accent-color:#408f7b;cursor:pointer}.volume-row output{font:11px ui-monospace,monospace;min-width:32px;text-align:right}.settings-footer{display:flex;justify-content:space-between;gap:12px;border-top:1px solid #dce1d2;padding-top:20px}.settings-footer button{font-size:12px}#intro-replay{background:transparent;border:0;padding-left:0;color:#7c8b7d}#settings-done{background:#377f6b;color:#fffdf2;border-color:#377f6b;padding-inline:24px}#audio-status{font-size:11px;color:#a5794c;margin:0 0 17px}#audio-status[hidden]{display:none}
html[lang=en] .chapter strong{font-size:14px;letter-spacing:0}html[lang=en] .mission h2{font-size:21px}html[lang=en] .module-card h2{font-size:25px;letter-spacing:0}html[lang=en] .card-kicker{letter-spacing:.04em}html[lang=en] .card-vector>b{white-space:normal;line-height:1.35}html[lang=en] .card-seal{font:26px Georgia,serif}html[lang=en] .card-example-title{flex-wrap:wrap}html[lang=en] .source-label{max-width:205px;font-size:11px}html[lang=en] .node-label{font-size:11px;white-space:normal;max-width:165px}html[lang=en] .level-choice strong{font-size:18px;letter-spacing:0}html[lang=en] .scene-bottom{font-size:10px}

/* Editing stays on the workbench instead of changing the page layout. */
.network-running #scene,.network-running .node-label,.network-running .port{cursor:grab}.network-running #scene:active,.network-running .node-label:active,.network-running .port:active{cursor:grabbing}
.wire-targets{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:0}.wire-targets path{fill:none;stroke:transparent;stroke-width:16;pointer-events:stroke;cursor:pointer;outline:none}.wire-targets path:hover,.wire-targets path:focus-visible{stroke:#cc9b5b45}.wire-targets path.selected{stroke:#cc9b5b77;stroke-width:10}.port,.node-label{z-index:2}.wire-actions{position:absolute;display:flex;align-items:center;gap:7px;max-width:calc(100% - 24px);padding:7px;background:#fffdf6f5;border:1px solid #d8bf98;border-radius:10px;box-shadow:0 6px 22px #344b3926;pointer-events:auto;z-index:8}.wire-actions>span{max-width:190px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:11px;color:var(--muted);padding:0 4px}.wire-actions button{min-height:29px;font-size:11px;padding:4px 8px}.wire-actions [data-delete-wire],.wire-actions [data-delete-node]{color:#a34d3d;background:#faece3;border-color:#dfbeb0}.wire-actions [data-close-wire],.wire-actions [data-close-node]{border:0;background:transparent;font-size:18px;padding:0 5px}
/* A compact left shelf can shrink to symbols without shrinking the whole UI. */
#module-shelf{position:absolute;left:17px;top:56px;width:176px;padding:7px;border:1px solid #c7d5c6;border-radius:10px;background:#fffdf6ee;box-shadow:0 4px 14px #344b3910;z-index:4}
#module-shelf[hidden]{display:none}
#module-shelf>summary{cursor:pointer;display:flex;align-items:center;justify-content:center;gap:5px;min-height:27px;padding:3px 5px;border:1px solid #bad0bb;border-radius:5px;background:#e7efe1;color:#476e59;font-size:11px;font-weight:500;line-height:15px;list-style:none}
#module-shelf>summary:hover{background:#dce9d7;border-color:#87ab8e}
#module-shelf>summary::-webkit-details-marker{display:none}
#module-shelf>summary:before{content:'▾';font-size:12px}
#module-shelf[open]>summary:before{content:'▴'}
#module-shelf[open] .shelf-closed-label,#module-shelf:not([open]) .shelf-open-label{display:none}
.shelf-toolbar{display:flex;align-items:center;justify-content:space-between;padding:3px 1px 0}
#module-count{font:10px ui-monospace,monospace;color:var(--muted);white-space:nowrap}
.shelf-size-controls{display:flex;gap:2px}
.shelf-size-controls button{width:18px;min-height:21px;padding:0;border:0;border-radius:4px;background:transparent;color:#658173;font:16px/21px sans-serif}
.shelf-size-controls button:hover:not(:disabled){background:#e5eddf}
#module-palette{display:grid;gap:4px;max-height:min(400px,calc(100vh - 335px));overflow-y:auto;scrollbar-width:thin;padding:5px 1px 2px;overscroll-behavior:contain}
.shelf-current,.shelf-earlier-list,.shelf-earlier-group{display:grid;gap:4px}
.shelf-current h4,.shelf-earlier-group h4{margin:1px 1px 4px;font-size:10px;font-weight:500;line-height:1.5;color:#688471}
.shelf-earlier{margin-top:5px;padding-top:7px;border-top:1px solid #d3decf}
.shelf-earlier>summary{display:flex;gap:4px;align-items:center;min-height:30px;color:#56745f;font-size:10px;cursor:pointer;list-style:none}
.shelf-earlier>summary::-webkit-details-marker{display:none}
.shelf-earlier>summary:before{content:'▸';font-size:11px}.shelf-earlier[open]>summary:before{content:'▾'}
.shelf-earlier>summary>span{margin-left:auto;font:9px ui-monospace,monospace;color:#839080}
.shelf-earlier>p{margin:3px 0 8px;color:#718572;font-size:10px;line-height:1.6}
.module-stock{display:flex;align-items:center;gap:6px;min-height:42px;padding:5px;border:1px solid var(--line);border-left:3px solid var(--stock-color);border-radius:6px;background:var(--paper);cursor:grab;touch-action:none;user-select:none}
.module-stock:hover{border-color:var(--stock-color);background:#fafff3}
.module-stock.recently-crafted{border-color:#70a990;background:#e4f0df}.module-stock.fusion-awaiting{opacity:.18!important}.module-stock.fusion-arrival{opacity:1!important;border-color:#3b9877;background:#dcedda}
#component-fusion{position:absolute;inset:0;z-index:5;pointer-events:none}#component-fusion[hidden]{display:none}.fusion-message{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);width:max-content;max-width:calc(100% - 285px);display:flex;align-items:center;flex-direction:column;gap:7px;padding:13px 22px;border:1px solid #aac6ac;border-radius:13px;background:#fafcf0f2;box-shadow:0 8px 25px #456a431c;text-align:center;color:#386d57}.fusion-message small{font-size:12px;color:#6e866e}.fusion-message strong{font:600 24px/1.4 Georgia,"Songti SC",serif}.fusion-message>span{font:12px ui-monospace,monospace;color:#6b8a78}#fusion-skip{position:absolute;right:18px;top:16px;pointer-events:auto;font-size:11px;min-height:30px;padding:5px 10px;background:#fffdf5e8;color:#688071}.synthesizing-component #labels{opacity:0;pointer-events:none}.synthesizing-component .scene-top,.synthesizing-component .scene-bottom{opacity:.12;pointer-events:none}
.module-stock:active{cursor:grabbing}
.module-stock:focus-visible{outline:2px solid #bc9b64;outline-offset:-1px}
.module-stock[data-add-disabled=true]{opacity:.5;cursor:help}.module-stock[aria-disabled=true]{cursor:default}
#module-shelf[data-mode=collection] .module-stock{opacity:1;cursor:help}#module-shelf[data-mode=collection] .stock-count{display:none}
.stock-description{display:flex;flex-direction:column;gap:2px;flex:1;min-width:0}
.stock-name{font-size:12px;font-weight:500;line-height:1.45;overflow-wrap:normal;word-break:normal}
.stock-description small{font:9px ui-monospace,monospace;color:#859387}
.stock-code{display:none;font:600 12px ui-monospace,monospace;color:#526e60}
.stock-count{flex-shrink:0;margin-left:auto;font:600 12px ui-monospace,monospace;color:#526e60}
.stock-matrix{width:24px;flex:0 0 24px;display:grid;gap:2px;transform:skewY(-9deg)}
.stock-matrix i{height:5px;background:var(--stock-color);border-radius:1px;box-shadow:0 1px #38544320}
.stock-matrix .negative{background:#c69e76}
.stock-symbol{font:600 16px/24px ui-monospace,monospace;font-size:min(16px,calc(36px / var(--symbol-chars,1)));overflow:hidden;width:24px;flex:0 0 24px;text-align:center;color:var(--stock-color)}
#module-shelf[data-size=small]{padding:6px}
#module-shelf[data-size=small] .stock-description{display:none}
#module-shelf[data-size=small] .stock-code{display:block}
#module-shelf[data-size=small] .module-stock{min-height:33px;gap:4px;padding:3px}
#module-shelf[data-size=small] .stock-matrix,#module-shelf[data-size=small] .stock-symbol{width:20px;flex-basis:20px}
#module-shelf[data-size=small] .shelf-current .stock-description{display:flex}
#module-shelf[data-size=small] .shelf-current .stock-code,#module-shelf[data-size=small] .shelf-current .stock-description small{display:none}
#module-shelf[data-size=small] .shelf-current .stock-name{font-size:11px;line-height:1.45}
#module-shelf[data-size=small] .shelf-current .module-stock{min-height:40px}
#module-shelf[data-size=small] .stock-symbol{font-size:min(13px,calc(30px / var(--symbol-chars,1)))}
#module-shelf[data-size=large] .module-stock{min-height:49px;padding:7px;gap:8px}
#module-shelf[data-size=large] .stock-name{font-size:12px;line-height:1.45}
html[lang=en] #module-shelf>summary{font-size:11px}


.placement-guide{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:0}.placement-guide[hidden]{display:none}.placement-guide-path{fill:none;stroke:#6d9b81;stroke-width:2;stroke-dasharray:5 9;animation:stock-guide-flow 1.6s linear infinite}.placement-guide-outline{fill:#6e9e8120;stroke:#6d9b8199;stroke-width:1.5;stroke-dasharray:6 6}@keyframes stock-guide-flow{to{stroke-dashoffset:-28}}@media(prefers-reduced-motion:reduce){.placement-guide-path{animation:none}}

#level-tracks{display:flex;gap:6px;padding:5px;margin:18px 0 8px;background:#e9ede2;border-radius:12px}#level-tracks button{flex:1;display:flex;justify-content:center;align-items:center;gap:10px;background:transparent;border-color:transparent;font-size:13px}#level-tracks button[aria-selected=true]{background:var(--paper);border-color:#c6d4c4;box-shadow:0 2px 6px #4156420c}#level-tracks button span{white-space:nowrap;flex-shrink:0;font:10px ui-monospace,monospace;background:#e7eddf;color:#738671;border-radius:4px;padding:2px 5px}

/* Learning stages separate input preparation, composition and new branches. */
#level-list.grouped-levels{display:block;margin-top:15px}
.level-stage-nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:15px}
.level-stage-nav button{min-height:30px;padding:5px 9px;font-size:11px;color:#6b7e6f;background:transparent;border-color:#d2dbcb}
.level-stage-nav button[aria-current=step]{color:#2e7869;background:#e4eee0;border-color:#88b09a}
/* The same stage palette colors the section and its jump button. */
[data-level-group],[data-stage-color]{--group-accent:#426d57;--group-bg:#eaf1e5;--group-border:#c4d5ba}
:is([data-level-group=workbench],[data-stage-color=workbench]){--group-accent:#8a5138;--group-bg:#f7e9df;--group-border:#e5c9b6}
:is([data-level-group=foundations],[data-stage-color=foundations]){--group-accent:#4d693b;--group-bg:#eaf1df;--group-border:#c9d7b8}
:is([data-level-group=attention],[data-stage-color=attention]){--group-accent:#3a6388;--group-bg:#e5eef8;--group-border:#bed1e4}
:is([data-level-group=encoder],[data-stage-color=encoder]){--group-accent:#306e65;--group-bg:#dff0eb;--group-border:#b9d8ce}
:is([data-level-group=decoder],[data-stage-color=decoder]){--group-accent:#775489;--group-bg:#efe6f5;--group-border:#d6c3e1}
:is([data-level-group=generation],[data-stage-color=generation]){--group-accent:#806124;--group-bg:#f7edcf;--group-border:#dfcfa0}
:is([data-level-group=single],[data-stage-color=single]){--group-accent:#396b7c;--group-bg:#e2eff3;--group-border:#bdd6df}
:is([data-level-group=tensor-parallel],[data-stage-color=tensor-parallel]){--group-accent:#785887;--group-bg:#efe7f4;--group-border:#d7c5e0}
/* Route colors also cover routes without learning-stage subsections. */
:is([data-level-group=modern],[data-stage-color=modern]){--group-accent:#8c4d62;--group-bg:#f4e3eb;--group-border:#dfbecd}
:is([data-level-group=engine],[data-stage-color=engine]){--group-accent:#486578;--group-bg:#e4ebf0;--group-border:#bdcdd9}
[data-stage-color=cloud]{--group-accent:#396b7c;--group-bg:#e2eff3;--group-border:#bdd6df}
body[data-stage-color]{background:var(--bg)}
body[data-stage-color] .arena{background:linear-gradient(145deg,#fcfcf4,color-mix(in srgb,var(--group-bg) 45%,#f4f2e9));border-color:var(--line)}
#level-menu[data-stage-color]{background:var(--paper)}
#level-tracks button[data-stage-color]{background:transparent;color:var(--muted);border-color:transparent}
#level-tracks button[data-stage-color][aria-selected=true]{background:var(--paper);color:var(--group-accent);border-color:var(--group-accent);box-shadow:none}
#level-list:not(.grouped-levels){padding:0}
.level-stage-nav button[data-stage-color]{color:var(--muted);background:transparent;border-color:transparent}
.level-stage-nav button[data-stage-color][aria-current=step]{color:var(--group-accent);background:var(--group-bg);font-weight:600}
.level-group{margin-top:24px;padding:0 0 20px;scroll-margin-top:8px;border-bottom:1px solid var(--line)}
.level-group:last-child{border-bottom:0}
.level-group-heading{position:sticky;top:0;z-index:1;padding:12px 0;background:var(--paper)}
.level-group-cards .level-choice:hover{border-color:var(--group-accent)}
.level-group-heading>div{display:flex;align-items:baseline;justify-content:space-between;gap:15px}
.level-group-heading h3{min-width:0;font:600 20px/1.4 Georgia,"Songti SC",serif;color:var(--group-accent)}
.level-group-heading small{flex-shrink:0;font-size:10px;color:#819080;white-space:nowrap}
#level-menu .level-group-heading p{margin-top:6px;font-size:12px;line-height:1.7;color:#6d7e71}
.level-group-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.level-group-cards .level-choice{width:100%;min-width:0}
.level-choice>.level-purpose{padding:2px 7px;border-radius:4px;background:#e6eee2;color:#4c7f67;font-size:10px;line-height:1.5}
.level-dependencies{display:grid;grid-template-columns:minmax(0,1.65fr) 32px minmax(0,1fr);align-items:center;gap:12px;margin-bottom:12px;padding:12px;border:1px solid #d5decd;border-radius:10px;background:#edf2e6;color:var(--group-accent)}
.level-dependency-sources{display:grid;gap:6px;min-width:0}
.level-dependency-sources>div,.level-dependency-target{display:grid;gap:3px;padding:8px 10px;background:#fffdf6;border:1px solid #d1ddc8;border-radius:6px;min-width:0}
.level-dependencies small{font-size:10px;line-height:1.4;color:#7d8d79}
.level-dependencies b{font-size:12px;font-weight:500;line-height:1.5;overflow-wrap:anywhere}
.level-dependency-target{border-color:var(--group-accent)}
.level-dependencies svg{display:block;width:32px;height:80px;overflow:visible}
.level-dependencies path{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
[data-level-group=decoder] .level-dependencies{background:#eee8f0;border-color:#d9cddd}
[data-level-group=decoder] .level-dependency-sources>div{border-color:#d9cddd}
.level-group-details{margin-top:10px;color:var(--muted);font-size:12px}
.level-group-details>summary{cursor:pointer;padding:5px 0;font-size:12px}
#level-menu .level-group-details>p{margin:10px 0 14px;font-size:12px;line-height:1.7}
.level-group-details>h4{font-size:12px;color:var(--ink);margin:16px 0 8px}
.lesson-note{display:grid;gap:4px;padding:10px 0;border-top:1px solid var(--line);font-size:12px}
.lesson-note>b{font-weight:500;color:var(--ink)}
.lesson-note .level-purpose{font-size:11px;color:var(--group-accent)}
.lesson-connection{line-height:1.6;color:var(--muted)}

/* A signal travels through a floating weight matrix, then lights the outputs. */
#welcome{position:fixed;inset:0;width:100vw;height:100vh;max-width:none;max-height:none;margin:0;padding:0;border:0;border-radius:0;overflow:hidden;background:radial-gradient(ellipse at 74% 39%,#e5eddb 0,transparent 51%),#f6f3e9;color:#2d5248;isolation:isolate}#welcome::backdrop{background:#f6f3e9}.welcome-grid{position:absolute;inset:0;background-image:linear-gradient(#54785c08 1px,transparent 1px),linear-gradient(90deg,#54785c08 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(100deg,transparent,#000);pointer-events:none}.welcome-copy{position:absolute;z-index:2;top:50%;left:9%;width:39%;transform:translateY(-50%)}.welcome-kicker{font:10px/1.3 ui-monospace,monospace;letter-spacing:.26em;color:#7e9480}.welcome-copy h2{font:600 clamp(56px,5.5vw,90px)/1.12 Georgia,"Songti SC",serif;letter-spacing:.05em;margin:24px 0 25px;color:#31594c}.welcome-copy p{font:17px/1.8 Georgia,"Songti SC",serif;color:#799077;margin:0}.welcome-actions{display:flex;gap:16px;align-items:center;margin-top:43px}.welcome-actions button{font-size:13px;min-height:48px;border-radius:9px;padding:12px 21px}#enter-workshop{display:flex;gap:32px;align-items:center;background:#397f6b;border-color:#397f6b;color:#fff9e8;box-shadow:0 6px 19px #3f765329;transition:transform .2s,box-shadow .2s}#enter-workshop:hover{transform:translateY(-2px);box-shadow:0 9px 25px #3f765336}#enter-workshop span{font-size:22px;line-height:1}#welcome-settings{border:0;background:transparent;color:#76866f}.welcome-edition{position:absolute;left:9%;bottom:6%;font:10px ui-monospace,monospace;letter-spacing:.15em;color:#97a18d}.welcome-machine{position:absolute;right:-2%;top:50%;width:59%;height:560px;transform:translateY(-50%);perspective:1100px}.machine-table{position:absolute;left:4%;top:50%;width:700px;height:440px;transform:translateY(-50%) rotateX(53deg) rotateZ(-26deg) scale(.92);transform-style:preserve-3d;background:linear-gradient(135deg,#ecf1e3,#dce6d6);border:1px solid #c4d1bc;border-radius:24px;box-shadow:-15px 20px 0 #a9bdaa,-22px 27px 0 #bac9b5,-45px 65px 60px #53745828;animation:table-hover 7s ease-in-out infinite}.machine-traces{position:absolute;inset:0;width:100%;height:100%;fill:none;stroke:#84b7a0;stroke-width:3}.machine-traces path{stroke-dasharray:1600;stroke-dashoffset:1600;animation:trace-awake 3s .3s ease forwards}.machine-inputs,.machine-outputs{position:absolute;top:55px;bottom:55px;display:flex;flex-direction:column;justify-content:space-between;transform:translateZ(13px)}.machine-inputs{left:17px}.machine-inputs>span{font:600 14px ui-monospace,monospace;padding:14px 16px;background:#d2e1d3;border:1px solid #b6cbb8;border-radius:8px;color:#426e5a;box-shadow:-4px 5px 0 #a9bfa9}.machine-inputs b{font-weight:400;margin-left:7px}.machine-inputs>span:nth-child(2){color:#836793}.machine-inputs>span:nth-child(3){color:#3c8a77}.machine-outputs{right:28px}.machine-outputs>i{width:45px;height:45px;border-radius:10px;background:#d4dfc7;border:1px solid #b2c2a3;box-shadow:-3px 4px 0 #a4b792;animation:output-awake 4.8s 2.1s infinite}.machine-outputs>i:nth-child(2){animation-delay:3.7s}.machine-outputs>i:nth-child(3){animation-delay:5.3s}.machine-core{position:absolute;left:295px;top:151px;width:135px;height:137px;transform:translateZ(66px);transform-style:preserve-3d}.core-matrix{position:absolute;inset:0;display:grid;grid-template-columns:repeat(4,1fr);gap:5px;padding:12px;border:1px solid #adc8b3;border-radius:12px;background:#e0ead9;box-shadow:-8px 9px 0 #91b79f,-9px 10px 0 1px #749f88,0 0 50px #81b69f25}.core-matrix i{font:12px ui-monospace,monospace;display:grid;place-items:center;font-style:normal;background:#a5cab3;color:#326c50;border-radius:3px;animation:weight-awake 4.8s calc(1.1s + var(--cell)*.08s) infinite}.core-matrix i:nth-child(3n){background:#d8ba97;color:#8a6440}.core-label{position:absolute;top:-37px;left:50%;transform:translateX(-50%);font:italic 32px Georgia,serif;color:#68967b}.core-base{position:absolute;inset:-20px;border:1px dashed #9eb89a;border-radius:50%;transform:translateZ(-65px);box-shadow:0 0 30px #87a67b10}.machine-packet{--packet-y:73px;position:absolute;width:13px;height:13px;border-radius:4px;left:20px;top:73px;background:#579b9e;box-shadow:0 0 13px #5cafa399;transform:translateZ(16px);animation:signal-trip 4.8s 1s linear infinite;opacity:0}.packet-b{--packet-y:213px;top:213px;background:#a58cb7;animation-delay:2.6s}.packet-c{--packet-y:353px;top:353px;background:#459c81;animation-delay:4.2s}.machine-caption{position:absolute;bottom:10px;left:34%;font:9px ui-monospace,monospace;letter-spacing:.17em;color:#98a690}.machine-orbit{position:absolute;width:590px;height:590px;border:1px solid #94ae8622;border-radius:50%;left:2%;top:0;transform:rotateX(40deg);pointer-events:none}.orbit-two{width:750px;height:750px;top:-80px;left:-78px;border-style:dashed;opacity:.45}
/* Choosing a level is a lobby, without a specific board behind the dialog. */
body:is([data-screen=home],[data-screen=levels]){background:radial-gradient(ellipse at 75% 25%,#e5eddb,transparent 55%),#f6f3e9}
body:is([data-screen=home],[data-screen=levels]) #game>:not(dialog){visibility:hidden;pointer-events:none}
body[data-screen=levels] #level-menu::backdrop{background:linear-gradient(#54785c06 1px,transparent 1px),linear-gradient(90deg,#54785c06 1px,transparent 1px),radial-gradient(ellipse at 75% 25%,#e5eddb,transparent 55%),#f6f3e9;background-size:48px 48px,48px 48px,100% 100%,100% 100%;backdrop-filter:none}
/* Start the welcome dialog at its heading; Tab still reveals button focus. */
#welcome-title:focus{outline:none}
#welcome[open] .welcome-copy{animation:welcome-copy-in .9s .1s both}#welcome.is-leaving{animation:welcome-out .42s both;pointer-events:none}html[lang=en] .welcome-copy h2{font-size:clamp(54px,5.3vw,84px);letter-spacing:-.04em;max-width:500px}html[lang=en] .welcome-copy p{font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;max-width:360px}
@keyframes table-hover{0%,100%{transform:translateY(-50%) rotateX(53deg) rotateZ(-26deg) scale(.92)}50%{transform:translateY(calc(-50% - 12px)) rotateX(51deg) rotateZ(-23deg) scale(.92)}}@keyframes trace-awake{to{stroke-dashoffset:0}}@keyframes weight-awake{0%,45%,100%{filter:brightness(1)}13%,24%{filter:brightness(1.35);box-shadow:0 0 9px #82b799}}@keyframes output-awake{0%,10%,45%,100%{background:#d4dfc7;box-shadow:-3px 4px 0 #a4b792}20%,32%{background:#90c5a6;box-shadow:-3px 4px 0 #87ab8c,0 0 24px #94c5a1}}@keyframes signal-trip{0%{opacity:0;left:70px;top:var(--packet-y)}6%{opacity:1}15%{left:170px;top:var(--packet-y)}25%{left:205px;top:213px}31%{left:298px;top:213px}43%{left:356px;top:213px;transform:translateZ(66px);opacity:.35}54%{left:420px;top:213px;transform:translateZ(16px);opacity:1}65%{left:500px;top:213px}75%{left:500px;top:var(--packet-y)}80%{left:639px;top:var(--packet-y);opacity:1}87%,100%{left:639px;top:var(--packet-y);opacity:0}}@keyframes welcome-copy-in{from{opacity:0;transform:translateY(calc(-50% + 18px))}to{opacity:1;transform:translateY(-50%)}}@keyframes welcome-out{to{opacity:0;transform:scale(1.025)}}
@media(max-width:1250px){.welcome-copy{left:6%;width:40%}.welcome-machine{right:-14%;transform:translateY(-50%) scale(.85)}.welcome-copy h2{font-size:60px}.welcome-copy p{font-size:15px}.welcome-edition{left:6%}}
@media(prefers-reduced-motion:reduce){.machine-table,.machine-packet,.machine-outputs>i,.core-matrix i,#welcome[open] .welcome-copy,#welcome.is-leaving{animation:none}.machine-traces path{animation:none;stroke-dashoffset:0}.machine-packet{display:none}.setting-switch,.setting-switch>span{transition:none}}

.brand{color:inherit;text-decoration:none;border-radius:10px;cursor:pointer}.brand:hover .brand-mark{background:var(--teal)}.brand:focus-visible{outline:3px solid #deac66;outline-offset:6px}

/* A fixed-width pause control keeps the run toolbar stable. */
#pause{flex:0 0 98px;white-space:nowrap;font-size:12px}
#pause[aria-pressed="true"]{background:#e0ece2;border-color:#7b9e8c;color:#365e4f}
.projection-calculation{position:absolute;transform:translate(0,-50%) scale(var(--calculation-scale,1));transform-origin:left center;pointer-events:none;white-space:nowrap;padding:4px 7px;border:1px solid #bacbbba8;border-radius:7px;background:#fffdf0e6;box-shadow:0 2px 8px #344c3b12;font:600 11px/1.5 ui-monospace,monospace;font-variant-numeric:tabular-nums;color:#68776b;z-index:4}
.projection-sum-symbol{display:none}.projection-calculation[data-detail="abstract"]{padding:1px 4px;border-radius:50%;color:#438f7e}.projection-calculation[data-detail="abstract"] .projection-equation{display:none}.projection-calculation[data-detail="abstract"] .projection-sum-symbol{display:block;font:600 15px/1.1 Georgia,serif}
.projection-result{position:absolute;transform:translate(0,-50%) scale(var(--calculation-scale,1));transform-origin:left center;pointer-events:none;padding:1px 5px;border:1px solid #8ead9b80;border-radius:4px;background:#fffdf0df;color:#294b3e;font:600 11px/1.4 ui-monospace,monospace;z-index:4}
.projection-result[hidden]{display:none}
.projection-calculation[hidden]{display:none}
.projection-calculation b{color:#294b3e;font-weight:700}
.projection-calculation{border-color:var(--calculation-color,#b77724);box-shadow:0 0 0 calc(2px * var(--calculation-focus,0)) var(--calculation-halo,#b7772433),0 2px 8px #344c3b12}
.projection-calculation[data-side="left"]{transform:translate(-100%,-50%) scale(var(--calculation-scale,1));transform-origin:right center}
.projection-calculation::before{content:"";position:absolute;left:-7px;top:calc(50% - 5px);width:10px;height:10px;background:#fffdf0;border-left:1px solid var(--calculation-color,#b77724);border-bottom:1px solid var(--calculation-color,#b77724);transform:rotate(45deg)}
.projection-calculation[data-side="left"]::before{left:auto;right:-7px;transform:rotate(225deg)}

/* The same example contrasts scaling with adding an update. */
.card-merge-contrast{border-top:1px dashed #ccbf9e;margin-top:12px;padding-top:9px;font-size:11px;color:#657064}
.card-merge-contrast[hidden]{display:none}.card-merge-contrast>code{display:block;margin:5px 0 8px;font-size:11px}
.merge-compare-row{display:flex;gap:10px;align-items:center;padding:6px 8px;border-radius:6px;margin:4px 0;background:#e6e8db66}
.merge-compare-row.current{background:color-mix(in srgb,var(--card-accent) 12%,#fff9e8);color:var(--card-accent)}
.merge-compare-row>strong{font:23px Georgia,serif;min-width:20px;text-align:center}.merge-compare-row code{font-size:12px}
.card-merge-contrast small{display:block;font-size:10px;line-height:1.6;margin-top:3px;color:#857756}
.rms-calculation .projection-equation>b{margin-right:4px}.rms-calculation .projection-equation{font-weight:500}

.token-calculation .projection-equation{font-weight:500}.token-calculation .projection-equation>b:first-child{margin-right:4px}.token-result{transform:translate(-50%,-100%) scale(var(--calculation-scale,1));transform-origin:center bottom;padding:1px 3px;font-size:10px}

.layernorm-calculation .projection-equation{font-weight:500}.layernorm-calculation .projection-equation>b{margin-right:4px}
.sequence-projection-calculation .projection-equation>b:first-child{margin-right:4px}

.encoder-stage-path{padding:9px 10px;margin-top:10px;border-left:3px solid #43897a;background:#43897a0b;font-size:12px;font-weight:600;line-height:1.8;color:#365d53}.encoder-job[data-encoder-job=process] .encoder-stage-path{border-color:#846990;background:#8469900b;color:#715780}.encoder-job .encoder-stage-source{font-weight:600}.encoder-job .encoder-stage-finish{margin-top:5px}.progress-setting{align-items:flex-start;flex-direction:column;gap:10px}.progress-setting button,#progress-reset-confirm button{font-size:12px}#progress-reset-confirm{padding:12px;background:#ac694b0b;border:1px solid #d7b6a5;border-radius:9px;margin-bottom:12px}#progress-reset-confirm p,#progress-reset-status{font-size:12px;line-height:1.7;margin:0 0 10px}#progress-reset-confirm>div{display:flex;justify-content:flex-end;gap:8px}#progress-reset-apply{color:#914d36;border-color:#cda18c}#progress-reset-status{color:#45685c}#progress-reset-confirm[hidden],#progress-reset-status[hidden]{display:none}

.shelf-current+.shelf-current,.shelf-earlier-group+.shelf-earlier-group{margin-top:8px;padding-top:7px;border-top:1px solid #d3decf}
/* Reserve real space for the open shelf; canvas and hit-target labels share a viewport. */
.arena{--shelf-space:0px;--shelf-width:202px}
.arena:has(>#module-shelf[data-size=small]){--shelf-width:176px}
.arena:has(>#module-shelf[data-size=large]){--shelf-width:232px}
#module-shelf{width:var(--shelf-width)}
.arena:has(>#module-shelf[open]:not([hidden])){--shelf-space:calc(var(--shelf-width) + 34px)}
.arena>#scene,.arena>#labels,.arena>#component-fusion{left:var(--shelf-space)}
.arena>#labels{overflow:hidden}
.arena>.scene-bottom,.arena>#device-docks{left:calc(var(--shelf-space) + 17px)}

.causal-primer{margin-top:12px}.causal-primer table{width:100%;border-collapse:separate;border-spacing:4px;text-align:center;font-size:12px}.causal-primer caption{text-align:left;font-weight:600;line-height:1.65;margin-bottom:6px}.causal-primer th{font-size:11px;font-weight:500;padding:4px}.causal-primer td{padding:5px;border-radius:5px}.causal-primer .allowed{background:#e0eee4;color:#376b51}.causal-primer .blocked{background:#ece5ee;color:#785884}.causal-primer>small{display:block;font-size:10px;line-height:1.65;color:#5d6e63}.causal-primer details{margin-top:10px;border:1px solid #cbd5c8;border-radius:7px;padding:8px}.causal-primer summary{cursor:pointer;font-size:12px;line-height:1.6;font-weight:600}.causal-step{display:grid;gap:3px;margin-top:9px;font-size:11px}.causal-step code{font-size:12px;white-space:nowrap;background:#fffdf5;border-radius:4px;padding:5px;color:#405d50}.causal-primer p{font-size:12px!important;line-height:1.7!important}

/* The optional architecture reference scrolls beneath a fixed dialog header. */
.structure-overview{display:block;width:100%;height:auto;overflow:visible}.structure-overview rect{fill:#fffdf7;stroke:#c7cfc5;stroke-width:1}.structure-overview text{font:11px -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;fill:#596b60}.structure-overview .map-region-active rect{fill:var(--group-bg);stroke:var(--group-accent);stroke-width:2}.structure-overview .map-region-active text{fill:var(--group-accent);font-weight:600}.structure-edges{fill:none;stroke:#8b9c90;stroke-width:1.2;stroke-linecap:round;stroke-linejoin:round}.structure-outlet{border-top:1px solid var(--group-border);padding-top:7px;margin-top:5px;display:grid;gap:3px}.structure-outlet small,.structure-next small{font-size:10px;color:#687c6c}.structure-outlet strong{font-size:11px;font-weight:600;line-height:1.65;color:#385649}.structure-outlet code{font-size:10px;color:#6a7d70}
#structure-dialog{width:850px;max-width:calc(100vw - 60px);max-height:calc(100vh - 55px);padding:0;overflow:hidden;background:#faf9f1}#structure-dialog[open]{display:flex;flex-direction:column}.structure-dialog-header{display:flex;align-items:center;justify-content:space-between;padding:16px 23px;border-bottom:1px solid var(--group-border);flex-shrink:0}.structure-dialog-header h2{font-size:20px}#structure-close{width:32px;min-height:32px;padding:0;font-size:21px}#structure-dialog-content{padding:18px 23px 23px;overflow:auto;min-height:0}.structure-context{margin-bottom:17px}.structure-context .structure-family{font-size:11px;color:var(--group-accent);margin:0 0 5px}.structure-context h3{font-size:18px}.structure-context .structure-reference{font-size:11px;margin-top:5px}.structure-expanded-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px;align-items:start}.structure-global .structure-overview{background:var(--group-bg);border:1px solid var(--group-border);border-radius:12px;padding:12px}.structure-global>p,.structure-next p{font-size:12px;line-height:1.8}.structure-global .structure-outlet{margin-top:15px;padding:12px;border:1px solid var(--group-accent);border-radius:8px;background:#fffdf8}.structure-global .structure-outlet strong{font-size:14px}.structure-next{margin-top:15px}.structure-next p{margin-top:4px}.structure-local h4{font-size:12px;margin:0 0 10px;color:var(--group-accent)}.structure-flow,.structure-flow ol{list-style:none;padding:0;margin:0}.structure-flow li{position:relative;margin:0 0 13px;padding:7px 9px;border:1px solid #d5dcd1;background:#fffdf6;border-radius:6px;font-size:12px;color:#637469;line-height:1.6}.structure-flow li:not(:last-child)::after{content:'↓';position:absolute;top:100%;left:50%;line-height:13px;color:#8b9c90}.structure-flow .map-step-focus{background:var(--group-bg);color:var(--group-accent);font-weight:600}.structure-flow .map-step-exit{border:2px solid var(--group-accent)}.map-step-exit b{display:block;font-size:10px;color:var(--group-accent);font-weight:500}.structure-flow .map-branch-pair{display:grid;grid-template-columns:1fr 1fr;align-items:start;gap:12px;border:0;padding:0;background:none}.map-branch-pair>ol>li:last-child::after{content:'↓';position:absolute;top:100%;left:50%;line-height:13px}.structure-local .structure-map-legend{font-size:10px;margin-top:9px}.structure-local .structure-note{font-size:12px;line-height:1.8;padding:10px;border-radius:7px;background:#edf0e7}

/* Expanded model boundaries make attention and FFN visible in both stacks. */
#structure-dialog{width:1040px}
.structure-overview text.structure-mini-inside{font-size:6.5px;font-weight:500}
.architecture-detail{margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--group-border)}
.architecture-heading{display:flex;align-items:baseline;justify-content:space-between;gap:15px;margin-bottom:12px}
.architecture-heading h4{margin:0;font-size:15px}.architecture-heading>span{font-size:10px;color:var(--group-accent)}
.architecture-columns{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.architecture-lane{min-width:0}.architecture-input{display:grid;gap:4px;background:#f0f1e8;border:1px solid #cdd6c8;padding:11px 13px;border-radius:9px;min-height:73px}
.architecture-input b{font-size:12px}.architecture-input span{font-size:12px;color:#617462}
.architecture-prep{text-align:center;position:relative;padding:8px;margin:17px 0;border:1px solid #d2d8cd;border-radius:6px;font-size:11px;background:#fffdf6}
.architecture-prep::before,.architecture-prep::after{content:'↓';position:absolute;left:50%;font-size:14px;line-height:17px;color:#90a18e}.architecture-prep::before{bottom:100%}.architecture-prep::after{top:100%}
.architecture-layer{border:1.5px solid #aebfab;padding:12px;background:#f0f3e9;border-radius:12px}
.architecture-layer>summary{font-size:13px;font-weight:600;color:#526c55;cursor:pointer}.architecture-layer[open]>summary{margin-bottom:10px}
.architecture-stage{position:relative;display:grid;gap:5px;background:#fffdf8;border:1px solid #ced6c9;border-radius:8px;padding:10px 11px}
.architecture-stage+.architecture-stage{margin-top:20px}.architecture-stage+.architecture-stage::before{content:'↓';position:absolute;bottom:100%;left:50%;height:21px;line-height:21px;color:#849880}
.architecture-stage>b{font-size:13px}.architecture-stage>span{font-size:11px;line-height:1.6;color:#677969}
.architecture-addnorm{font-size:10px;border-top:1px solid #dce3d7;padding-top:6px;margin-top:2px;color:#687c67}
.architecture-focus{background:var(--group-bg);border-color:var(--group-accent);box-shadow:inset 3px 0 var(--group-accent)}
.architecture-stage.architecture-focus>b{color:var(--group-accent)}
.architecture-addnorm.architecture-focus{padding:6px 8px;border-radius:4px}
.architecture-memory,.architecture-readout{position:relative;display:grid;gap:5px;margin-top:20px;border:1px solid #b8cbbb;border-radius:8px;padding:11px 13px;background:#e5eee4}
.architecture-memory::before,.architecture-readout::before{content:'↓';position:absolute;bottom:100%;left:50%;height:21px;line-height:21px;color:#849880}
.architecture-memory b,.architecture-readout b{font-size:12px}.architecture-memory span,.architecture-readout span{font-size:11px;color:#60765f;line-height:1.6}
.architecture-memory-link{font-size:11px;font-weight:600;color:#357461;background:#e5eee4;margin:-10px -11px 4px;padding:7px 10px;border-radius:7px 7px 0 0;border-bottom:1px solid #bccfbc}
#structure-dialog .architecture-depth{font-size:11px;line-height:1.7;margin-top:13px}
.architecture-weights{padding:12px 15px;border:1px dashed #abbda5;border-radius:9px;margin-top:14px;background:#f3f3e9}
.architecture-weights>b{font-size:12px}#structure-dialog .architecture-weights p{font-size:12px;line-height:1.75;margin-top:5px;color:#52684f}.architecture-weights small{display:block;margin-top:6px;font-size:10px;line-height:1.65;color:#7a8873}
.architecture-drilldown{font-size:11px;color:#55705c;min-width:0}.architecture-drilldown>summary{cursor:pointer;line-height:1.7;color:var(--group-accent);text-underline-offset:3px}.architecture-drilldown>summary:hover{text-decoration:underline}
.architecture-drilldown[open]{padding:7px 9px;border:1px solid #c9d6c4;border-radius:6px;background:#fffdf8}.architecture-drilldown ol{margin:8px 0 0;padding-left:19px}.architecture-drilldown li{padding:4px 0;line-height:1.7;overflow-wrap:anywhere}.architecture-drilldown li+li{border-top:1px solid #e1e7dc}#structure-dialog .architecture-drilldown p{font-size:11px;line-height:1.75;margin-top:7px}
.modern-layer{margin-top:17px}.modern-layer .architecture-stage+.architecture-stage{margin-top:18px}
.execution-detail>.architecture-stage{margin:15px 0}.execution-input{padding:11px;text-align:center;font-size:12px;background:#eff2e7;border-radius:7px}.execution-parallel{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:15px 0}.execution-parallel>.architecture-stage{margin:0}.execution-parallel>.architecture-stage::before{display:none}
/* One optional hint dialog, opened beside level navigation. */
#hint{font-size:12px;padding:6px 14px;white-space:nowrap}


/* Show heads as parallel complete computations, not Q and K branches. */
.heads-primer{margin:12px 0}.heads-input,.heads-join{text-align:center;padding:7px;font-size:11px;background:#fffdf680;border:1px solid var(--line);border-radius:6px}.heads-pair{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px;margin:17px 0}.heads-branch{position:relative;display:flex;flex-direction:column;gap:7px;padding:9px 5px;border:1px solid #91b5a7;border-radius:6px;background:#e4eee6;text-align:center;color:#396b59}.heads-branch[data-head="1"]{border-color:#b19bc2;background:#eee6f3;color:#715583}.heads-branch:before,.heads-branch:after{content:"";position:absolute;width:1px;height:17px;background:currentColor;opacity:.5;left:50%}.heads-branch:before{bottom:100%}.heads-branch:after{top:100%}.heads-branch b{font-size:12px}.heads-branch code{font:10px ui-monospace,monospace;white-space:nowrap}.heads-branch small{font-size:10px;line-height:1.5}.heads-join span{display:block;margin-top:5px}.heads-primer details{border-top:1px solid var(--line);margin-top:10px;padding-top:8px}.heads-primer summary{cursor:pointer;font-size:11px;line-height:1.6;color:#536f62}.heads-primer details p{font-size:11px;line-height:1.7}.heads-primer table{width:100%;border-collapse:collapse;margin:9px 0;font-size:11px;font-variant-numeric:tabular-nums}.heads-primer td,.heads-primer th{padding:5px 2px;text-align:center;border-bottom:1px solid var(--line)}

.scene-bottom{gap:12px}#scene-help{min-width:0;line-height:1.5}

#shelf-tooltip{white-space:pre-line;position:fixed;z-index:100;pointer-events:none;width:max-content;max-width:calc(100vw - 24px);padding:8px 11px;border:1px solid var(--line);border-radius:7px;background:var(--paper);color:var(--ink);font-size:12px;line-height:1.5;box-shadow:0 4px 16px #263a3d24;animation:shelf-tip-show .08s ease-out .15s both}#shelf-tooltip[hidden]{display:none}@keyframes shelf-tip-show{from{opacity:0}to{opacity:1}}@media(prefers-reduced-motion:reduce){#shelf-tooltip{animation-duration:0s}}

.card-number[data-origin-level]{max-width:180px;letter-spacing:0;line-height:1.5}

/* The generation lesson maps its teaching stand-in to the outer model loop. */
.generation-mini{display:grid;gap:7px;padding:9px 0;color:#5c7069;font-size:11px;text-align:center}.generation-mini>b{position:relative;border:1px solid var(--group-border);border-radius:5px;background:var(--group-bg);padding:5px 7px;color:var(--group-accent);font-weight:600}.generation-mini>b:not(:last-of-type)::after{content:'↓';position:absolute;top:100%;left:50%;font-size:9px;line-height:7px}.generation-return{color:var(--group-accent)}
.generation-map-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:22px;align-items:start}.generation-map-grid h4{font-size:13px;color:var(--group-accent);margin:0 0 12px}.generation-map-grid .structure-flow strong,.generation-map-grid .structure-flow span{display:block}.generation-map-grid .structure-flow span{font-size:11px;margin-top:3px}.generation-map-grid .structure-flow p{font-size:12px;font-weight:400;color:#526960;line-height:1.8;margin:7px 0 1px}.generation-map-grid .structure-note{font-size:12px;line-height:1.8}.generation-example{font-size:12px;line-height:1.8;color:#4e655c}.generation-example table{width:100%;border-collapse:collapse;table-layout:fixed;background:#fffdf7}.generation-example th,.generation-example td{border-bottom:1px solid #dce1d5;padding:8px 5px;text-align:center;overflow-wrap:anywhere}.generation-example th{font-size:11px;color:#697a70;font-weight:500}.generation-example td{font-size:13px}.generation-example .generation-chosen{background:#e2efe3;color:#286350;font-weight:600}.generation-predictions th:last-child{width:44%}.generation-predictions td:last-child{font-size:11px;font-weight:400;text-align:left}.generation-example>p{margin:10px 0;font-size:12px;line-height:1.8}.generation-window{display:grid;gap:10px;margin-top:16px;padding:13px;border:1px solid var(--group-border);border-radius:9px;background:#fffdf8}.generation-window>div{display:grid;gap:5px}.generation-window small{font-size:11px;color:#67796d}.generation-window>div>div{display:flex;gap:5px;align-items:center}.generation-token{display:inline-block;min-width:42px;padding:4px 8px;border:1px solid #c5d5c7;border-radius:5px;background:#edf2e8;text-align:center;color:#38564c;font-weight:600}.generation-token.generation-new{background:#cce7d5;border-color:#64947b;color:#24533f}.generation-token.generation-dropped{opacity:.4;text-decoration:line-through}.generation-window i{font-style:normal;color:#78917f}.generation-loop-note{padding:12px 14px;border-radius:8px;background:var(--group-bg);font-size:12px;line-height:1.8;margin:17px 0;color:var(--group-accent)}.generation-reference>summary{cursor:pointer;font-size:13px;color:var(--group-accent);padding:8px 0}.generation-reference>p{font-size:12px;line-height:1.8;color:#5c7069;margin:8px 0 16px}.card-example .generation-example th{font-size:11px}

/* Route and stage navigation stay outside the scrolling level list. */
.level-menu-header{padding:18px 24px 10px;border-bottom:0}.level-menu-navigation{flex-shrink:0;padding:0 24px 14px;border-bottom:1px solid var(--line);background:inherit}.level-menu-navigation .level-menu-intro{margin:8px 0!important;line-height:1.5}#level-tracks{margin:12px 0 8px;padding:4px;background:var(--bg)}#level-tracks button{min-height:36px;padding:7px 10px}#level-tracks button span{background:transparent;color:inherit;padding:0}.level-menu-navigation .level-stage-nav{margin:0}.level-stage-nav[hidden]{display:none}.level-menu-content{padding:8px 24px 18px}#level-list,#level-list.grouped-levels{margin-top:0;gap:10px}.level-group:first-child{margin-top:0}.level-group-cards{gap:10px}.level-choice{min-height:0;padding:12px 14px;gap:5px;background:transparent;border-color:var(--line)}.level-choice strong{font:600 16px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink)}.level-choice.current{border-color:var(--group-accent);background:color-mix(in srgb,var(--group-bg) 35%,var(--paper))}.level-choice.track-finale{border-top-width:1px}.level-dependencies{padding:10px;margin:12px 0;gap:8px}
/* Menu focus stays on the button edge, clear of sticky headings and clipping. */
#level-menu button:focus-visible{outline:2px solid var(--group-accent,var(--teal));outline-offset:-2px}
.mission{background:var(--paper);padding:18px;border:1px solid var(--line)}.mission>p{font-size:13px;line-height:1.7}.mission-progress{padding-top:12px;border-top:1px solid var(--line)}.mission-progress span:first-child{font-size:18px}
.topbar{gap:16px}.chapter{min-width:0}.chapter strong{font-size:14px}.topbar>button{flex-shrink:0}
.chapter-copy{min-width:0;max-width:54ch}
#chapter-summary{margin:3px 0 0;color:#536761;font-size:12px;line-height:1.5;overflow-wrap:break-word}
#chapter-summary:empty{display:none}
.route{flex-wrap:wrap;row-gap:5px}
#levels-open{display:inline-flex;align-items:center;gap:6px;flex-shrink:0;padding:6px 8px;margin-left:-8px;background:transparent;border-color:transparent;color:var(--group-accent,var(--teal));font-size:11px;white-space:nowrap}#levels-open span{color:inherit}#levels-open i{font-size:15px;font-style:normal}#levels-open:hover{border-color:var(--group-accent,var(--teal));background:var(--paper)}#levels-open:focus-visible{outline:2px solid var(--group-accent,var(--teal));outline-offset:2px}
@media(min-width:1080px){body{min-width:0}}
body:not(.demo-level) .source-label{width:max-content;max-width:min(205px,42%);white-space:normal}

/* The final model is a prepared exhibit; region views keep the unfolded circuit navigable. */
#demo-views{position:absolute;left:50%;top:45px;transform:translateX(-50%);display:flex;gap:4px;z-index:12;padding:5px;border:1px solid var(--line);border-radius:9px;background:#fbfaf0ed;white-space:nowrap}#demo-views[hidden]{display:none}#demo-views button{min-height:26px;padding:4px 9px;font-size:11px}.demo-section-label{position:absolute;transform:translate(-50%,-50%);font-size:12px;font-weight:600;letter-spacing:.025em;pointer-events:none;padding:4px 10px;border-radius:5px;background:#fbfaf0d9;white-space:nowrap}.demo-level .port{pointer-events:none}.demo-level .arena{isolation:isolate}

.demo-level #scene{cursor:grab}.demo-level #scene:active{cursor:grabbing}

#demo-generation{position:absolute;left:16px;top:45px;display:flex;align-items:center;gap:12px;z-index:12;padding:7px 13px;border:1px solid var(--line);border-radius:10px;background:#fbfaf0ed;pointer-events:none}#demo-generation[hidden]{display:none}#demo-generation-count{font-size:11px;white-space:nowrap;color:var(--muted)}#demo-transcript{display:flex;gap:5px;font-size:18px;font-weight:650}.seed-token{opacity:.5}.generated-token{background:#ead29770;border-radius:5px;padding:1px 6px;color:#73571f}.feedback-packet{background:#fff7d9;border:1px solid #c9a353;color:#71551d;box-shadow:0 0 20px #d1a64d40}.feedback-packet .packet-values{font-size:21px}

#demo-follow-view{border:1px solid var(--line);border-radius:7px;background:#fffdf5;color:var(--ink);padding:6px;font:inherit;font-size:11px}#demo-follow-view[hidden]{display:none}

.demo-level .demo-section-label{color:var(--section-color)}
#demo-pan[aria-pressed="true"],.demo-level #demo-follow[aria-pressed="true"]{background:var(--group-accent);color:#fff}

/* The dark exhibit palette is only active in fullscreen. */
body.demo-level.demo-fullscreen[data-stage-color] .arena{
 background:radial-gradient(ellipse at 18% 24%,#16475999,transparent 52%),radial-gradient(ellipse at 80% 72%,#42337199,transparent 55%),radial-gradient(ellipse at 50% 100%,#15384977,transparent 55%),#080f20;
 border-color:#344967;box-shadow:inset 0 0 90px #04081677,0 12px 32px #07142122;color:#d6e5f0;
}
.demo-level.demo-fullscreen .arena::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(circle,#8acddd70 .7px,transparent 1px),radial-gradient(circle,#c0b7e755 .8px,transparent 1px);background-size:113px 107px,173px 157px;background-position:18px 23px,61px 83px;opacity:.5}
.demo-level.demo-fullscreen .scene-top,.demo-level.demo-fullscreen .scene-bottom,.demo-level.demo-fullscreen .scene-legend{color:#a8c4d9}
.demo-level.demo-fullscreen .scene-identity .chip{background:#122d40;border-color:#33556d;color:#b8e8f0}
.demo-level .scene-controls{max-width:none;gap:5px}
.demo-level #scene-help{max-width:30%}
.demo-level.demo-fullscreen #scene-help{text-shadow:0 1px 4px #000}
.demo-level.demo-fullscreen .scene-controls button,.demo-level.demo-fullscreen #demo-follow-view,.demo-level.demo-fullscreen #demo-views button{background:#142438ed;border-color:#38516c;color:#c7ddeb}
.demo-level.demo-fullscreen .scene-controls button:hover,.demo-level.demo-fullscreen #demo-views button:hover{background:#203d55;border-color:#77c8d4;color:#efffff}
.demo-level.demo-fullscreen #demo-pan[aria-pressed="true"],.demo-level.demo-fullscreen #demo-follow[aria-pressed="true"],.demo-level.demo-fullscreen #demo-fullscreen[aria-pressed="true"]{background:#23576c;border-color:#63b8cb;color:#e1fcff;box-shadow:0 0 16px #47b4d024}
.demo-level.demo-fullscreen #demo-views,.demo-level.demo-fullscreen #demo-generation{background:#102033ed;border-color:#344f6b;box-shadow:0 4px 20px #03091744}
.demo-level #demo-views{top:14px}
.demo-level .scene-top{top:65px}
.demo-level #demo-generation{top:103px;max-width:calc(100% - 32px);flex-wrap:wrap;gap:5px 12px}
.demo-level.demo-fullscreen #demo-generation-count{color:#a8c4d9}
.demo-level.demo-fullscreen .generated-token{background:#245363;color:#c0f3ed}
.demo-level.demo-fullscreen .seed-token{color:#c8d6eb;opacity:.65}
.demo-level.demo-fullscreen .demo-section-label{color:color-mix(in srgb,var(--section-color) 50%,#ffffff);background:#102136e8;border:1px solid #3d5365;box-shadow:0 3px 14px #03081755}
.demo-level.demo-fullscreen .node-label{background:#13273bed;border-color:#4e6a7c;color:#cee0e9;box-shadow:0 3px 12px #02091555}
.demo-level.demo-fullscreen .source-label{color:#a6bed4;text-shadow:0 1px 4px #000}
.demo-level.demo-fullscreen .source-label b{color:#deefff}
.demo-level.demo-fullscreen .arena .port{background:#192f43;color:#bed3e2;border-color:#6b8b9f}
.demo-level.demo-fullscreen .arena .port.connected{background:#1d4248;border-color:#7cb8af;color:#c6eae0}
/* Native fullscreen where available; fill the page in embedded browsers. */
body.demo-fullscreen{overflow:hidden}
.demo-level.demo-fullscreen .scene-top #sample-name{color:#deefff}
.demo-level #game.demo-expanded{position:fixed;inset:0;z-index:50;max-width:none;width:100%;height:100%;margin:0;padding:12px;display:flex;flex-direction:column;background:#080f20;overflow:hidden}
.demo-level #game.demo-expanded>.topbar,.demo-level #game.demo-expanded>.route,.demo-level #game.demo-expanded>main>aside{display:none}
.demo-level #game.demo-expanded>main{display:flex;flex:1;min-height:0}
.demo-level #game.demo-expanded .arena{flex:1;height:auto;min-height:0;max-height:none}
.demo-level #game.demo-expanded>.run-toolbar{flex-shrink:0;padding:10px 6px 0;min-height:68px;color:#c9dfeb;--muted:#a8c4d9;--line:#344f6b}
.demo-level #game.demo-expanded>.run-toolbar>button{background:#173549;border-color:#385970;color:#d5edf3}
.demo-level #game.demo-expanded>.run-toolbar>.run{background:#286858;border-color:#4f9c88;color:#effff8}
.demo-level #game.demo-expanded .view-sliders :is(.playback-caption,output){color:#a8d5da}
.demo-level #game.demo-expanded #feedback{color:#c9dfeb}
.demo-level #game.demo-expanded #run-report{color:var(--ink)}

.progress-setting{align-items:flex-start;gap:16px}.progress-setting .setting-label{flex:1;min-width:0}.progress-actions{display:flex;flex-direction:column;align-items:stretch;gap:8px;max-width:210px}.progress-actions button{font-size:12px;white-space:normal}#progress-restart{border-color:#819e90;background:#e5eee3;color:#31594c}#progress-restart-undo{font-size:12px;margin-top:10px}#progress-restart-undo[hidden]{display:none}

/* Curated glossary terms: dashed underline plus a hover/focus popover. */
.glossary-term{text-decoration-line:underline;text-decoration-style:dashed;text-decoration-color:var(--muted);text-underline-offset:.18em;text-decoration-thickness:1px;cursor:help;border-radius:2px}
.glossary-term:hover,.glossary-term:focus-visible{text-decoration-color:var(--teal)}
.glossary-term:focus-visible{outline:2px solid #deac66;outline-offset:2px}
#glossary-popover{position:fixed;z-index:101;pointer-events:none;width:max-content;max-width:min(290px,calc(100vw - 24px));padding:9px 12px;border:1px solid var(--line);border-radius:9px;background:var(--paper);color:var(--ink);font-size:13px;line-height:1.55;box-shadow:0 8px 24px #263a3d2e;animation:glossary-pop-show .08s ease-out both}
#glossary-popover[hidden]{display:none}
.glossary-popover-term{font-size:13px;font-weight:600}
.glossary-popover-name{margin-left:6px;color:var(--muted);font-size:12px}
.glossary-popover-definition{margin-top:4px;color:var(--ink)}
.glossary-popover-hint{display:block;margin-top:6px;color:var(--muted);font-size:11px}
@keyframes glossary-pop-show{from{opacity:0}to{opacity:1}}
@media(prefers-reduced-motion:reduce){#glossary-popover{animation-duration:0s}}

#layernorm-equations{margin:10px 0;padding:12px;border:1px solid var(--line);border-radius:8px;background:var(--paper)}
#layernorm-equations math{font-family:math;font-size:1.1rem;math-style:normal}
.layernorm-moments{display:flex;justify-content:center;flex-wrap:wrap;gap:12px 22px;margin-top:12px}

.attention-weight-steps>summary{cursor:pointer;font-weight:600}
.structure-flow .attention-weight-steps>ol{margin-top:8px}
.structure-flow .attention-weight-steps li{background:var(--paper);font-weight:400}

.engine-level .run-toolbar:has(#run-report.performance-failed:not([hidden])){flex-wrap:wrap}
.engine-level .run-toolbar .feedback.error{flex:1 1 220px;white-space:normal;color:#944331;font-size:14px}
#run-report.performance-failed{flex-basis:100%;height:auto;align-items:flex-start;padding:12px 14px;border:1px solid #d6b5a4;border-radius:8px;background:var(--paper)}
#run-report.performance-failed .run-report-content{max-height:42vh}
#run-report .failed-metrics h3{font-size:15px;color:#873f2c}
.failed-metrics ul{margin:4px 0 12px;padding-left:20px;color:var(--ink);font-size:14px}