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rgba(74, 100, 134, .14);--grid-coarse: rgba(74, 100, 134, .26);--shadow-lift: 0 6px 14px rgba(95, 80, 55, .2);--shadow-hovercard: 0 14px 36px rgba(95, 80, 55, .28), 0 0 0 1px rgba(95, 80, 55, .08);--shadow-menu: 0 10px 28px rgba(95, 80, 55, .25);--shadow-drawer-left: 16px 0 42px rgba(95, 80, 55, .3);--shadow-drawer-right: -16px 0 42px rgba(95, 80, 55, .3);--shadow-tag: inset 0 1px 2px rgba(95, 80, 55, .18), 0 1px 0 rgba(255, 255, 255, .7);--shadow-device: inset 0 1px 0 rgba(255, 255, 255, .65), 0 2px 6px rgba(95, 80, 55, .18);--shadow-pressed: inset 0 1px 3px rgba(95, 80, 55, .25);--shadow-input-focus: 0 0 7px rgba(74, 86, 107, .3);--bezel: #4a4337;--pivot-ring: #57503f;--cap-base: #9d937e;--cap-highlight: rgba(255, 255, 255, .55);--toggle-face: radial-gradient(circle at 50% 60%, #ddd6c8, #b9b09c 75%);--toggle-well: inset 0 2px 5px rgba(95, 80, 55, .35);--pivot-face: radial-gradient(circle at 35% 30%, #9b937f, #635c4c 70%);--lever-face: linear-gradient(90deg, #c4bcab, #968e7b 55%, #6e6757);--lever-shadow: 0 0 4px rgba(95, 80, 55, .4);--cap-face: radial-gradient(circle at 35% 30%, #cfc8b8, #9e9683 75%);--pad-face: linear-gradient(180deg, #d3ccbc 0%, #aaa28e 100%);--device-face: linear-gradient(180deg, #f7f4ec 0%, #e6e0d2 100%);--lamp-bezel: #7b7363;--chip-edge: #6e6757;--pin-name: #9fb1c6;--bclk-lit-mid: #4d8efa;--bclk-lit: #1f63e6;--bclk-lit-rim: #123f9e;--bclk-glow: rgba(31, 99, 230, .45);--bclk-bloom: rgba(31, 99, 230, .22);--bclk-ink: #6e8095}:root{--plate-face: linear-gradient(180deg, #7a8ca6 0%, #62738c 52%, #4d5c72 100%);--plate-edge: #a8bad0;--plate-shadow: 0 2px 5px rgba(0, 0, 0, .6);--plate-shadow-hi: 0 5px 12px rgba(0, 0, 0, .72);--rail-face: linear-gradient(180deg, #131a24 0%, #0d131b 100%);--rail-edge: #2b3849;--slot-face: linear-gradient(180deg, #1b2430 0%, #151d27 100%);--slot-inner: inset 0 3px 5px rgba(0, 0, 0, .75), inset 0 -1px 0 rgba(150, 185, 220, .14);--plane-face: rgba(30, 42, 58, .5);--plane-edge: rgba(120, 160, 200, .22);--plane-label: 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auto}.canvas-wrap.primer-wrap{grid-template-rows:1fr;overflow:hidden}.canvas-wrap .react-flow{min-height:0}.react-flow__renderer{background:var(--bg-deep)}.react-flow__attribution{display:none}.hook-strip{position:absolute;top:12px;left:50%;transform:translate(-50%);z-index:5;pointer-events:none;background:var(--bg-hovercard);border:1px solid var(--line);border-radius:3px;padding:7px 14px;max-width:70ch;font-size:11.5px;color:var(--text-label);box-shadow:var(--shadow-lift)}.hook-strip b{color:var(--hot-ink);font-weight:400}.node{position:relative;font-family:var(--font-mono)}.node-label{position:absolute;left:0;top:-17px;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-label);opacity:.8;white-space:nowrap;pointer-events:none}.rail{position:absolute;background:var(--rail-face);border:1px solid var(--rail-edge);border-radius:2px;overflow:hidden}.rail 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4px);pointer-events:none}.plate[data-on=true]{box-shadow:var(--plate-shadow-hi)}.plate.h[data-on=true]{transform:translate(var(--throw))}.plate.v[data-on=true]{transform:translateY(var(--throw))}.plate.h[data-on=true]:before{content:"";position:absolute;top:-1px;bottom:-1px;right:-1px;width:3px;border-radius:0 2px 2px 0;background:var(--hot);box-shadow:0 0 6px var(--hot-glow)}.plate.v[data-on=true]:before{content:"";position:absolute;left:-1px;right:-1px;bottom:-1px;height:3px;border-radius:0 0 2px 2px;background:var(--hot);box-shadow:0 0 6px var(--hot-glow)}.pin{position:absolute;border-radius:50%;background:var(--pivot-face);border:1px solid var(--plate-edge);z-index:5;transition:background .18s ease,box-shadow .18s ease}.pin[data-engaged=true]{background:radial-gradient(circle at 35% 30%,var(--hot-bright),var(--hot-core) 70%);box-shadow:0 0 0 2px var(--hot-wash),0 0 8px var(--hot-glow)}.node[data-jammed=true] .plate{border-color:var(--hot)}.node[data-jammed=true] .rail .floor{background:repeating-linear-gradient(45deg,var(--hot) 0 2px,transparent 2px 7px)}.jam-tag{position:absolute;right:4px;top:-17px;font-size:10px;font-weight:700;letter-spacing:.1em;color:var(--hot-ink)}.lever-node{width:148px;height:76px}.lever-body{position:absolute;left:0;top:26px;width:112px;height:24px}.lever-cap{position:absolute;width:26px;height:26px;border-radius:3px;top:25px;left:86px;background:var(--lever-face);border:1px solid var(--plate-edge);box-shadow:var(--plate-shadow);cursor:pointer;z-index:6;transition:transform .26s cubic-bezier(.34,.02,.2,1),background .2s ease}.lever-cap[data-on=true]{transform:translate(var(--throw));background:var(--lever-face-on, var(--hot-deep));border-color:var(--hot)}.flag-node{width:128px;height:84px}.flag-mast{position:absolute;left:22px;bottom:8px;width:4px;height:44px;background:var(--plate-edge);border-radius:2px}.flag-vane{position:absolute;left:26px;bottom:34px;width:0;height:0;border-left:34px solid var(--wire-low);border-top:9px solid transparent;border-bottom:9px solid transparent;transform-origin:0 50%;transition:transform .3s cubic-bezier(.34,.02,.2,1),border-left-color .22s ease}.flag-node[data-on=true] .flag-vane{border-left-color:var(--hot);transform:rotate(-38deg)}.flag-readout{position:absolute;right:8px;bottom:10px;font-size:17px;font-family:var(--font-display);font-weight:700;color:var(--wire-low)}.flag-node[data-on=true] .flag-readout{color:var(--hot-ink)}.drive-node{width:132px;height:68px}.drive-body{position:absolute;top:12px;right:8px;bottom:12px;left:8px;background:var(--device-face);border:1px solid var(--plate-edge);border-radius:3px;box-shadow:var(--shadow-device);display:flex;align-items:center;justify-content:center;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--engrave)}.joint-node{width:64px;height:40px}.joint-plate{position:absolute;top:12px;right:4px;bottom:12px;left:4px;background:var(--plate-face);border:1px solid var(--plate-edge);border-radius:2px;box-shadow:var(--plate-shadow);transition:transform .26s cubic-bezier(.34,.02,.2,1)}.joint-plate[data-on=true]{transform:translate(var(--throw));border-color:var(--hot)}.react-flow__handle{width:9px;height:9px;border-radius:50%;background:var(--pin);border:1px solid var(--line-bright)}.react-flow__handle-top{background:var(--conn-line)}.react-flow__edge-path{stroke:var(--wire-low);stroke-width:3px}.react-flow__edge.rod-on .react-flow__edge-path{stroke:var(--hot);stroke-width:3.5px;filter:drop-shadow(0 0 3px var(--hot-glow))}.react-flow__edge.rod-control .react-flow__edge-path{stroke-dasharray:6 4}.lesson{grid-area:lesson;background:var(--bg-rail);border-left:1px solid var(--line);overflow-y:auto;padding:16px 18px 48px}@media(max-width:1180px){.workbench.lesson-open{grid-template-columns:264px 1fr;grid-template-areas:"toolbar toolbar" "shelf canvas"}.lesson{position:absolute;top:0;right:0;bottom:0;width:min(380px,62vw);z-index:20;border-left:1px solid var(--line-bright);box-shadow:var(--shadow-drawer-right, -16px 0 42px rgba(0, 0, 0, .45))}.workbench{position:relative}}@media(max-width:820px){.workbench,.workbench.lesson-open{grid-template-columns:1fr;grid-template-areas:"toolbar" "canvas"}.shelf{position:absolute;top:0;left:0;bottom:0;width:min(264px,76vw);z-index:21;border-right:1px solid var(--line-bright);box-shadow:var(--shadow-drawer-left, 16px 0 42px rgba(0, 0, 0, .45))}}.lesson h2{font-family:var(--font-display);font-size:11px;letter-spacing:.18em;text-transform:uppercase;margin:0 0 4px}.lesson .stage-tag{font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--hot-ink);margin-bottom:10px}.lesson .hook{font-size:12.5px;color:var(--text);margin:0 0 14px;padding-left:10px;border-left:2px solid var(--hot)}.lesson p{font-size:11.5px;color:var(--text-label);margin:0 0 10px}.lesson .watch{border:1px solid var(--line);border-radius:3px;padding:10px 12px;margin-bottom:12px;background:var(--bg-node)}.lesson .watch strong{display:block;font-size:9.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--text-label);margin-bottom:5px}.predict{border:1px solid var(--line);border-radius:3px;padding:11px 12px}.predict .q{font-size:11.5px;margin-bottom:9px;color:var(--text)}.predict button{display:block;width:100%;text-align:left;margin-bottom:5px;background:transparent;border:1px solid var(--line-bright);border-radius:3px;padding:7px 10px;cursor:pointer;color:var(--text);font-family:var(--font-mono);font-size:11px}.predict button:hover{background:var(--wash-hover)}.predict button[data-verdict=right]{border-color:var(--ok);color:var(--ok)}.predict button[data-verdict=wrong]{border-color:var(--hot-border);color:var(--hot-ink)}.predict .feedback{font-size:11px;color:var(--text-label);margin-top:8px}.lesson-nav{display:flex;gap:8px;margin-top:16px}.element-node .plate.v,.element-node .rail.v{transform:translateY(calc(var(--explode) * -46px))}.element-node .plate.v[data-on=true]{transform:translateY(calc(var(--throw) + var(--explode) * -46px))}.pin-shaft{position:absolute;left:102px;top:34px;width:4px;height:calc(var(--explode) * 44px);background:linear-gradient(180deg,var(--plate-edge),var(--wire-low));opacity:var(--explode);border-radius:2px;z-index:4;transition:height .26s ease,opacity .26s ease}.pin-shaft[data-engaged=true]{background:linear-gradient(180deg,var(--hot),var(--hot-core));box-shadow:0 0 6px var(--hot-glow)}.stratum-tag{position:absolute;right:2px;font-size:8.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--plane-label);opacity:calc(var(--explode) * .85);transition:opacity .26s ease;pointer-events:none;white-space:nowrap}.stratum-tag.control{top:calc(-8px - var(--explode) * 40px)}.stratum-tag.signal{top:92px}.crank-prompt{font-family:var(--font-mono);font-size:11px;letter-spacing:.09em;text-transform:uppercase;cursor:pointer;color:var(--hot-ink);background:var(--hot-wash);border:1px solid var(--hot-border);border-radius:3px;padding:6px 12px;animation:crank-pulse 1.6s ease-in-out infinite}.crank-prompt:hover{background:var(--hot-faint)}@keyframes crank-pulse{0%,to{box-shadow:0 0 0 0 var(--hot-pulse-lo)}50%{box-shadow:0 0 0 4px transparent;border-color:var(--hot)}}.waiting-banner{position:absolute;left:50%;top:74px;transform:translate(-50%);z-index:6;max-width:62ch;display:flex;flex-direction:column;gap:7px;background:var(--bg-hovercard);border:1px solid var(--hot-border);border-left:3px solid var(--hot);border-radius:3px;padding:11px 15px;font-size:11.5px;color:var(--text-label);box-shadow:var(--shadow-lift)}.waiting-banner 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.count{margin-left:auto;opacity:.7;letter-spacing:.08em}.lever-panel-note{font-size:10.5px;color:var(--text-label);opacity:.75;margin:0}.lever-panel-note code{color:var(--hot-ink);background:var(--hot-wash);padding:1px 4px;border-radius:2px}.lever-bank{display:flex;flex-wrap:wrap;gap:6px}.lever-switch{display:flex;align-items:center;gap:7px;background:transparent;border:1px solid var(--line-bright);border-radius:3px;padding:6px 10px 6px 7px;cursor:pointer;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--text-label);min-width:74px}.lever-switch:hover{background:var(--wash-hover)}.lever-switch .slot{position:relative;width:26px;height:14px;flex:none;background:var(--slot-face);border-radius:2px;box-shadow:var(--shadow-pressed)}.lever-switch .knob{position:absolute;left:1px;top:1px;width:12px;height:12px;background:var(--plate-face);border:1px solid var(--plate-edge);border-radius:2px;transition:transform .2s 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