.ai-course{--ink:#19372f;--green:#196b4d;--muted:#596e63;--line:#d6dfd1;--paper:#fffef9;--pale:#edf2e6;--gold:#b6842b;color:var(--ink);background:var(--paper);font:16px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color-scheme:light;overflow-wrap:anywhere}.ai-course *{box-sizing:border-box}.ai-course a{color:var(--green);text-underline-offset:4px}.ai-course :is(a,button,summary,input,select):focus-visible{outline:3px solid #b6842b;outline-offset:4px}.ai-course .course-header{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;min-height:74px;padding:16px max(5%,calc((100% - 1280px)/2));border-bottom:1px solid var(--line);background:var(--paper)}.ai-course .brand{font-size:23px;font-weight:850;letter-spacing:-1px;text-decoration:none;color:var(--ink)}.ai-course .brand span{font-weight:450}.ai-course .course-header nav{display:flex;gap:20px;flex-wrap:wrap;font-size:12px}.ai-course .course-main{max-width:1280px;margin:auto;padding:0 5% 50px}.ai-course .course-top{display:flex;justify-content:space-between;gap:16px;padding:24px 0;font-size:12px}.ai-course .course-top span{font:10px ui-monospace,monospace;letter-spacing:1px;color:var(--muted);align-self:center}.ai-course .course-hero{padding:45px 0 38px;max-width:860px}.ai-course .eyebrow{font:700 11px/1.6 ui-monospace,Consolas,monospace;letter-spacing:1.2px;color:var(--green);margin:0 0 16px}.ai-course h1{font:normal clamp(40px,5.5vw,74px)/1.06 Georgia,serif;letter-spacing:-2px;margin:0 0 24px;color:var(--ink)}.ai-course .lede{font-size:20px;line-height:1.65;max-width:740px;margin:0 0 18px}.ai-course p{margin:14px 0;line-height:1.8}.ai-course .small{font-size:12px;color:var(--muted)}.ai-course .goals{display:flex;flex-wrap:wrap;gap:8px 28px;padding:0 0 0 18px;margin-top:24px;font-size:13px}.ai-course .goals li{flex:1 1 200px;padding-right:15px}.ai-course .lesson-tabs{display:flex;flex-wrap:wrap;gap:10px;border-block:1px solid var(--line);padding:12px 0;margin:0 0 24px}.ai-course .lesson-tabs a{padding:8px 15px;border-radius:4px;text-decoration:none;font-size:13px}.ai-course .lesson-tabs a[aria-current]{background:var(--green);color:var(--paper)}.ai-course .reading-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:50px}.ai-course .contents{padding-top:30px;align-self:start;position:sticky;top:16px}.ai-course .contents nav{display:flex;flex-direction:column;gap:13px}.ai-course .contents nav a{font-size:12px;text-decoration:none;line-height:1.6}.ai-course .margin-note{margin:30px 0;border-top:1px solid var(--line);padding:18px 0;font-size:12px}.ai-course .margin-note p{color:var(--muted)}.ai-course .reading-section{padding:38px 0;border-bottom:1px solid var(--line);scroll-margin-top:24px}.ai-course h2{font:normal clamp(29px,3.2vw,40px)/1.2 Georgia,serif;letter-spacing:-.7px;margin:0 0 22px;color:var(--ink)}.ai-course h3{font:650 15px/1.5 system-ui;margin:20px 0 12px;color:var(--ink)}.ai-course ol,.ai-course ul{padding-left:24px}.ai-course li{margin:12px 0;padding-left:3px}.ai-course .textbook-note{background:#edf2e6;border-left:4px solid #79966a;border-radius:0 5px 5px 0;padding:18px 22px;margin:26px 0;font-size:14px}.ai-course .textbook-note>strong{font:700 11px ui-monospace,monospace;letter-spacing:.8px;color:var(--green)}.ai-course .textbook-note p{margin:9px 0 0}.ai-course .predict{background:#f5efdd;border:1px solid #e5d8b9;border-radius:5px;padding:18px 22px;font:italic 19px/1.7 Georgia,serif;margin:26px 0}.ai-course .predict span{display:block;font:700 10px ui-monospace,monospace;letter-spacing:1px;color:#82601f;margin-bottom:8px}.ai-course .demo{border:1px solid #c7d3bf;border-radius:8px;background:#f5f7ee;padding:25px;margin:28px 0;min-width:0;box-shadow:0 5px 0 #e8ecdf}.ai-course .demo-heading{display:flex;align-items:start;justify-content:space-between;gap:12px;flex-wrap:wrap}.ai-course .demo-tag{font:10px ui-monospace,monospace;color:var(--muted)}.ai-course button,.ai-course .button{font:600 12px/1.5 system-ui;display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid #a8bea5;border-radius:5px;background:#fffef9;color:var(--ink);padding:10px 14px;min-height:42px;cursor:pointer;text-decoration:none;white-space:normal}.ai-course button:hover,.ai-course .button:hover{background:#e1ead7}.ai-course .primary{background:var(--green);color:var(--paper);border-color:var(--green)}.ai-course .primary:hover{background:#125439}.ai-course button:disabled{opacity:.55;cursor:default}.ai-course label{display:block;font-size:13px;margin:14px 0 7px;font-weight:600}.ai-course input:not([type=radio]),.ai-course select{font:14px system-ui;width:100%;border:1px solid #afc0a8;border-radius:5px;padding:11px;color:var(--ink);background:var(--paper);min-width:0}.ai-course input[type=range]{accent-color:var(--green);padding:0;margin:10px 0;cursor:pointer}.ai-course output{font-family:ui-monospace,monospace;padding-left:12px}.ai-course .control-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin:14px 0}.ai-course .control-row>label{flex:1 1 140px;margin:0 12px 0 0;max-width:210px}.ai-course .split{display:grid;grid-template-columns:1fr 1fr;gap:24px;min-width:0}.ai-course .split>div{min-width:0}.ai-course .token-sequence{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.ai-course .token{display:inline-block;border:1px solid #b2c7aa;background:#fffef9;border-radius:4px;padding:5px 9px;font:14px ui-monospace,monospace}.ai-course .token.generated{background:#dce9cf;border-color:#7d9d6e}.ai-course .bar-row{display:grid;grid-template-columns:65px minmax(0,1fr) 48px;gap:10px;align-items:center;margin:9px 0;font:11px ui-monospace,monospace}.ai-course .bar-track{height:12px;border-radius:3px;background:#dfe6d8;overflow:hidden}.ai-course .bar-fill{height:100%;background:#477e54;min-width:1px}.ai-course .bar-value{text-align:right}.ai-course .network{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:20px 0}.ai-course .network-layer{border:1px solid #d3ddc9;border-radius:6px;padding:10px 5px;background:var(--paper);text-align:center;position:relative}.ai-course .network-layer:not(:last-child):after{content:'→';position:absolute;right:-12px;top:48%;color:#658657;z-index:1}.ai-course .network-layer strong{font-size:10px;font-weight:600;display:block;min-height:36px;line-height:1.5}.ai-course .neuron{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;border:1px solid #658d57;margin:10px auto;font:11px ui-monospace,monospace;color:#19372f}.ai-course details{border-top:1px solid var(--line);padding:15px 0;font-size:13px;margin-top:20px}.ai-course summary{font-size:13px;font-weight:650;cursor:pointer}.ai-course pre{margin:14px 0;background:#203e33;color:#f3f3df;padding:18px;border-radius:5px;font:12px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%;tab-size:2}.ai-course code{font: .85em ui-monospace,Consolas,monospace;background:#e7eddf;border-radius:3px;padding:2px 4px}.ai-course .copy-box{margin:24px 0}.ai-course .copy-box pre{margin-bottom:9px}.ai-course .example-answer{border:1px dashed #9ab08b;padding:16px;margin-top:20px;background:var(--paper);font-size:13px}.ai-course .example-answer p{margin-bottom:0}.ai-course .trace{padding-left:25px}.ai-course .trace li{font-size:13px;border-bottom:1px solid #d8e2ce;padding:12px 6px;animation:trace-enter .25s ease-out}.ai-course .trace strong{color:var(--green)}.ai-course .flow-line{display:flex;flex-wrap:wrap;gap:12px;align-items:center;background:#eaf0e2;border:1px solid var(--line);padding:20px;border-radius:6px;margin:25px 0;font:12px ui-monospace,monospace}.ai-course .flow-line b{color:#7e9a6b}.ai-course .concept-pair{background:#f0f3e9;padding:24px;border:1px solid var(--line);border-radius:6px;font-size:13px}.ai-course .expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}.ai-course .expert{padding:18px 10px;border:1px solid #b9c9af;border-radius:5px;font-size:12px;background:var(--paper)}.ai-course .expert.active{background:#dfeacb;border:2px solid #638341;padding:17px 9px}.ai-course .expert b{display:block;font-size:15px}.ai-course .expert small{display:block;margin-top:8px}.ai-course .game-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;width:100%;max-width:285px}.ai-course .game-board button{aspect-ratio:1;min-width:0;font:normal 30px Georgia,serif;position:relative;padding:15px}.ai-course .game-board small{position:absolute;top:5px;left:8px;font:10px ui-monospace,monospace;color:var(--muted)}.ai-course .game-board .best{border:3px solid var(--green);background:#e0ebd4}.ai-course #move-scores{font-size:12px}.ai-course .table-wrap{overflow-x:auto;margin:20px 0}.ai-course table{border-collapse:collapse;width:100%;font-size:12px}.ai-course caption{text-align:left;font-size:11px;color:var(--muted);margin-bottom:8px}.ai-course th,.ai-course td{text-align:left;border-bottom:1px solid #cedbc5;padding:10px 9px;vertical-align:top}.ai-course th{background:#e4ecdb;color:var(--ink)}.ai-course .concept-check{border:1px solid #bdcdb2;border-radius:6px;margin:28px 0;padding:20px;min-width:0}.ai-course legend{padding:0 8px;font-size:15px;font-weight:650;line-height:1.6}.ai-course .concept-check label{font-weight:400;display:flex;gap:12px;align-items:baseline;font-size:14px;line-height:1.7}.ai-course input[type=radio]{accent-color:var(--green);flex-shrink:0}.ai-course .concept-check p{font-size:13px;margin-bottom:0;color:var(--green);min-height:26px}.ai-course .teacher-notes{margin:35px 0}.ai-course .lesson-footer{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding:28px 0;font-size:13px}.ai-course .course-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:20px 0 45px}.ai-course .course-card{border:1px solid #cdd9c2;border-top:4px solid #60844f;border-radius:6px;background:#f0f4e9;padding:25px;text-decoration:none;color:var(--ink)}.ai-course .course-card:nth-child(2){border-top-color:#b18b46;background:#f7f0df}.ai-course .course-card:nth-child(3){border-top-color:#70969a;background:#edf3f0}.ai-course .course-card h2{font-size:30px;margin-bottom:15px}.ai-course .course-card p{font-size:14px}.ai-course .course-card strong{font-size:12px;color:var(--green)}.ai-course .page-footer{font-size:12px;border-top:1px solid var(--line);padding:25px 0;margin-top:40px;color:var(--muted)}.ai-course .no-js{padding:15px;background:#f5efdd;font-size:13px}@keyframes trace-enter{from{opacity:.3;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.ai-course .trace li{animation:none}}@media(max-width:1000px){.ai-course .reading-layout{grid-template-columns:160px minmax(0,1fr);gap:28px}.ai-course .course-main{padding-inline:4%}.ai-course .course-cards{gap:12px}.ai-course .course-card{padding:20px}}@media(max-width:760px){.ai-course .reading-layout{display:block}.ai-course .contents{position:static;padding:10px 0 25px;border-bottom:1px solid var(--line)}.ai-course .contents nav{display:flex;flex-direction:row;flex-wrap:wrap;gap:10px 20px}.ai-course .margin-note{display:none}.ai-course .course-hero{padding:30px 0}.ai-course .split,.ai-course .course-cards{grid-template-columns:1fr}.ai-course .demo{padding:18px}.ai-course .course-main{padding-inline:20px}.ai-course .course-header{padding:16px 20px}.ai-course .course-header nav{gap:12px;font-size:11px}.ai-course .course-top span{display:none}.ai-course .network{gap:8px}.ai-course .network-layer:not(:last-child):after{right:-9px}.ai-course .neuron{width:36px;height:36px;font-size:10px}.ai-course .network-layer strong{font-size:9px;min-height:42px}.ai-course .network-layer{padding:9px 3px}.ai-course .lesson-tabs a{font-size:12px;padding:7px 10px}.ai-course .expert{padding:12px 7px;font-size:11px}.ai-course .expert.active{padding:11px 6px}.ai-course .expert b{font-size:12px}.ai-course .textbook-note{padding:17px}.ai-course .reading-section{padding-block:30px}.ai-course .goals{display:block}.ai-course .game-board{max-width:285px}.ai-course .course-top{padding-block:18px}.ai-course .lede{font-size:18px}.ai-course .concept-check{padding:16px}.ai-course .flow-line{padding:15px;font-size:11px}.ai-course .control-row button{flex:1 1 120px}}@media print{.ai-course .contents,.ai-course button,.ai-course .course-header,.ai-course .lesson-tabs{display:none}.ai-course .reading-layout{display:block}.ai-course .course-main{padding:0}.ai-course .demo{break-inside:avoid;box-shadow:none}.ai-course pre{color:#111;background:#eee}.ai-course details{display:block}}

.ai-course .lesson-diagram{margin:28px 0;padding:22px;border:1px solid #c7d4c0;border-radius:8px;background:#fffef9;min-width:0;max-width:100%}.ai-course .lesson-diagram figcaption h3{font-size:16px;margin:0 0 10px;line-height:1.5}.ai-course .lesson-diagram figcaption p{font-size:13px;line-height:1.75;color:var(--muted);margin:0 0 20px}.ai-course .diagram-scroll{max-width:100%;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-color:#98ad8b #eef2e8;scrollbar-width:thin;border-radius:5px;background:#fbfcf7}.ai-course .diagram-scroll:focus-visible{outline:3px solid #b6842b;outline-offset:4px}.ai-course .concept-svg{display:block;width:100%;min-width:760px;height:auto;overflow:visible}.ai-course .diagram-input{--diagram-fill:#efe8f4;--diagram-stroke:#9a7faa}.ai-course .diagram-query{--diagram-fill:#e5f1fa;--diagram-stroke:#668faa}.ai-course .diagram-key{--diagram-fill:#e8f0df;--diagram-stroke:#779460}.ai-course .diagram-value{--diagram-fill:#fff0d8;--diagram-stroke:#b78b49}.ai-course .diagram-neutral{--diagram-fill:#f4f6ee;--diagram-stroke:#a0b09b}.ai-course .diagram-inactive{--diagram-fill:#f1f2ef;--diagram-stroke:#a7afa2;opacity:.7}.ai-course .diagram-node rect,.ai-course .diagram-node>path{fill:var(--diagram-fill,#f4f6ee);stroke:var(--diagram-stroke,#a0b09b);stroke-width:1.6}.ai-course .diagram-inactive rect{stroke-dasharray:5 4}.ai-course .diagram-label{fill:#19372f;font:600 17px system-ui,-apple-system,sans-serif}.ai-course .diagram-detail{fill:#496252;font:14px system-ui,-apple-system,sans-serif}.ai-course .diagram-vector{fill:#3d594b;font:13px ui-monospace,SFMono-Regular,Consolas,monospace}.ai-course .diagram-formula{fill:#254b3a;font:16px ui-monospace,SFMono-Regular,Consolas,monospace}.ai-course .diagram-edge-label{fill:#284e3b;font:15px system-ui,-apple-system,sans-serif;paint-order:stroke;stroke:#fbfcf7;stroke-width:5px;stroke-linejoin:round}.ai-course .diagram-matrix{fill:#556e5e;font:12px ui-monospace,Consolas,monospace;paint-order:stroke;stroke:#fbfcf7;stroke-width:5px}.ai-course .diagram-panel-title{fill:#254b3a;font:600 17px system-ui,-apple-system,sans-serif}.ai-course .diagram-link{fill:none;stroke:#527160;stroke-width:1.7;stroke-linejoin:round}.ai-course .diagram-branch{fill:none;stroke:#8a9f80;stroke-width:1.4;stroke-linejoin:round}.ai-course .query-bus{fill:none;stroke:#668faa;stroke-width:1.6;stroke-dasharray:5 4}.ai-course .diagram-lifeline{fill:none;stroke:#bcc9b4;stroke-width:1.3;stroke-dasharray:5 5}.ai-course .diagram-frame{fill:#f5f7ef;stroke:#c9d7be;stroke-width:1.2}.ai-course .softmax-group{fill:#edf2e7;stroke:#c1d1b5;stroke-width:1.2}.ai-course .lesson-diagram .diagram-note{font-size:12px;line-height:1.75;color:var(--muted);margin:18px 0 0}.ai-course .diagram-scroll-hint{display:none;font-size:11px;color:var(--muted);margin:12px 0 0}.ai-course .concept-flow{display:grid;grid-template-columns:var(--diagram-columns);gap:6px;align-items:stretch;margin:18px 0 10px}.ai-course .flow-node{min-width:0;padding:17px 12px;border:1.5px solid var(--diagram-stroke,#a0b09b);background:var(--diagram-fill,#f4f6ee);border-radius:7px;display:flex;flex-direction:column;justify-content:center;text-align:center}.ai-course .flow-node strong{font-size:13px;line-height:1.5;display:block;margin-bottom:9px}.ai-course .flow-node span{font-size:12px;line-height:1.65;color:#496252}.ai-course .flow-arrow{display:grid;place-items:center;font:22px Georgia,serif;color:#68835b}.ai-course .demo>.lesson-diagram{margin-inline:0;padding:18px;background:#fffef9}@media(max-width:1100px){.ai-course .concept-flow{grid-template-columns:1fr}.ai-course .flow-node{flex-direction:row;align-items:center;gap:18px;text-align:left;justify-content:flex-start}.ai-course .flow-node strong{flex:0 0 150px;margin:0}.ai-course .flow-arrow{transform:rotate(90deg);height:22px}.ai-course .diagram-scroll-hint{display:block}}@media(max-width:760px){.ai-course .lesson-diagram{padding:17px;margin:24px 0}.ai-course .lesson-diagram figcaption p{font-size:13px}.ai-course .flow-node{display:block;padding:14px 16px}.ai-course .flow-node strong{font-size:14px;margin-bottom:6px}.ai-course .flow-node span{font-size:13px}.ai-course .concept-flow{gap:4px}.ai-course .demo>.lesson-diagram{padding:13px}.ai-course .lesson-diagram figcaption h3{font-size:15px}}@media print{.ai-course .diagram-scroll{overflow:visible}.ai-course .concept-svg{min-width:0}.ai-course .diagram-scroll-hint{display:none}.ai-course .lesson-diagram{break-inside:avoid}.ai-course .concept-flow{grid-template-columns:var(--diagram-columns)}.ai-course .flow-node{display:block}.ai-course .flow-arrow{transform:none}}
.ai-course .diagram-weighted-vector{fill:#3d594b;font:12px ui-monospace,SFMono-Regular,Consolas,monospace}

/* Lesson 9 project brief editor. */
.ai-course .project-planner textarea{display:block;width:100%;max-width:100%;margin-top:8px;padding:12px;border:1px solid #afbea7;border-radius:5px;background:var(--paper);color:var(--ink);font:15px/1.6 system-ui,sans-serif;resize:vertical}.ai-course .project-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 20px}.ai-course .project-fields>label{min-width:0}.ai-course .project-fields>label:last-child{grid-column:1/-1}.ai-course .project-planner .copy-box{margin-top:24px}.ai-course .project-planner button:disabled{opacity:.55;cursor:default}.ai-course .project-planner textarea:focus-visible{outline:3px solid #b6842b;outline-offset:4px}@media(max-width:760px){.ai-course .project-fields{grid-template-columns:minmax(0,1fr)}}

/* Lesson 7: actual pretrained-model observations. */
.ai-course .observer{margin-block:28px;overflow:hidden}.ai-course .observer textarea{display:block;width:100%;max-width:100%;box-sizing:border-box;border:1px solid #afbea7;border-radius:7px;background:#fffef9;color:#244531;padding:12px;font:15px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;resize:vertical}.ai-course .observer .control-row{flex-wrap:wrap;gap:10px}.ai-course .observer .observer-import{display:inline-flex;align-items:center;cursor:pointer;margin:0;font-size:14px}.ai-course .observer-import input{max-width:190px;margin-left:8px;font-size:12px}.ai-course .observer button:disabled{opacity:.5;cursor:default}.ai-course .observer-run-info{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding:12px 0;border-block:1px solid #d3dec9;font-size:12px}.ai-course .observer input[type=range]{width:100%;margin:12px 0}.ai-course .observer-context{background:#f1f4eb;border-radius:8px;padding:14px 18px;margin-block:14px}.ai-course .observer-context h3{margin-top:0}.ai-course .observer pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:260px;overflow:auto;margin-block:10px}.ai-course .observer code{white-space:pre-wrap;overflow-wrap:anywhere}.ai-course .observer .bar-row{grid-template-columns:minmax(80px,1fr) 1fr 65px;gap:7px;font-size:12px}.ai-course .observer-metrics{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px 15px;font-size:13px}.ai-course .observer-metrics dt{color:#536b55}.ai-course .observer-metrics dd{margin:0;font-variant-numeric:tabular-nums;text-align:right}.ai-course .observer-heat-scroll{overflow-x:auto;overscroll-behavior-inline:contain;margin-block:16px;padding-block:8px}.ai-course .observer-heat-row{display:flex;gap:10px;align-items:center;min-width:650px;margin-bottom:6px}.ai-course .observer-heat-row>span{font-size:12px;min-width:52px}.ai-course .observer-heat-row canvas{width:calc(100% - 62px);height:30px;min-width:580px;image-rendering:pixelated;border-radius:3px}.ai-course .observer-heat-row canvas:focus{outline:3px solid #547f39;outline-offset:2px}.ai-course .observer-pipeline{display:grid;grid-template-columns:1fr 24px 1.3fr 24px 1.3fr;gap:8px;align-items:stretch}.ai-course .observer-pipeline>div{padding:16px 12px;background:#edf2e7;border:1px solid #b8c8ae;border-radius:7px;text-align:center}.ai-course .observer-pipeline strong,.ai-course .observer-pipeline span{display:block}.ai-course .observer-pipeline strong{font-size:14px}.ai-course .observer-pipeline span{font-size:12px;color:#50664c}.ai-course .observer-pipeline>span{display:grid;place-items:center;font-size:23px}.ai-course .observer [hidden]{display:none!important}.ai-course #observer-status{min-height:2em}.ai-course #observer-cell{font:13px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;background:#edf2e7;padding:10px 12px;border-radius:5px}@media(max-width:760px){.ai-course .observer{padding:16px}.ai-course .observer .split{display:block}.ai-course .observer .control-row>*{max-width:100%;box-sizing:border-box}.ai-course .observer-import{flex-wrap:wrap;gap:5px}.ai-course .observer-import input{margin-left:0}.ai-course .observer-pipeline{grid-template-columns:1fr}.ai-course .observer-pipeline>span{transform:rotate(90deg)}.ai-course .observer-metrics{font-size:12px}.ai-course .observer .bar-row{grid-template-columns:minmax(70px,1fr) 1fr 60px}}

/* Instrument view: computed activity, fixed coordinates, no decorative activation data. */
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.brain-console{margin-inline:-9px;padding:16px 11px 13px}.ai-course .brain-topline{gap:7px;align-items:start}.ai-course .brain-console h3{font-size:20px}.ai-course .brain-kicker{font-size:8px;letter-spacing:.9px}.ai-course .brain-topline button{font-size:9px;padding:6px}.ai-course .brain-toolbar{gap:13px}.ai-course .brain-headline{gap:7px;min-height:80px}.ai-course .brain-headline strong{font-size:13px}.ai-course .brain-counter{min-width:75px}.ai-course .brain-counter b{font-size:38px}.ai-course .brain-counter span{font-size:6px!important}.ai-course .brain-canvas-overlay{left:9px;right:9px;flex-direction:column;gap:3px;font-size:7px;letter-spacing:.5px}.ai-course #brain-canvas{height:290px}.ai-course .brain-canvas-footer{left:7px;right:7px;gap:5px;font-size:7px}.ai-course .brain-layer-strip{gap:3px;margin-bottom:14px}.ai-course .brain-layer-strip button{min-height:37px;font-size:9px}.ai-course .brain-layer-strip i{width:15px}.ai-course .brain-inspector{padding:12px 11px}.ai-course .brain-inspector-controls{gap:18px}.ai-course .brain-inspector-heading{font-size:8px}.ai-course .brain-equation-stats{gap:6px}.ai-course .brain-equation-stats span{font-size:7px;letter-spacing:0}.ai-course .brain-equation-stats b{font-size:12px}.ai-course .brain-console .brain-formula{font-size:17px}.ai-course .brain-console .brain-equation{font-size:10px}.ai-course .brain-console.brain-expanded{inset:6px;padding:15px 11px}.ai-course .brain-expanded #brain-canvas{height:38vh;min-height:260px}.ai-course .brain-expanded .brain-topline h3{font-size:22px}}@media print{.ai-course .brain-console{break-inside:avoid;box-shadow:none}.ai-course .brain-console.brain-expanded{position:static;overflow:visible}}
.ai-course .brain-run-controls{display:flex;flex-wrap:wrap;gap:7px;margin-top:15px}.ai-course .brain-run-controls button:not(:disabled)[data-brain-action=observer-step]{color:#aaffed;border-color:#538c81;background:#142c2c}.ai-course .brain-console .brain-context{border-left:2px solid #5d8c9d;padding:7px 12px;margin:17px 0 3px;background:#101c2b;font:13px/1.7 ui-monospace,monospace;color:#c0d8e5;max-height:85px;overflow:auto;white-space:pre-wrap}.ai-course .brain-expanded .brain-context{max-height:65px}.ai-course .brain-expanded #brain-canvas{height:clamp(260px,39vh,520px)}@media(max-width:760px){.ai-course .brain-console .brain-context{font-size:11px}.ai-course .brain-run-controls{gap:5px}.ai-course .brain-run-controls button{font-size:10px;padding-inline:9px}.ai-course .brain-expanded #brain-canvas{min-height:230px;height:32vh}}
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