/* Scholar Quest reusable interaction skin.
   Mechanics use semantic tokens only; theme packs may override these values. */
.sq-ih{
  --interaction-ink:#17212b;--interaction-muted:#5f6b76;--interaction-accent:#526d80;--interaction-accent-soft:#edf3f6;
  --interaction-stage:#fff;--interaction-feedback:#f6f8f9;--interaction-border:#d5dde2;--interaction-fixed:#edf1f3;
  --interaction-manipulable:#dcecf4;--interaction-success:#287448;--interaction-success-soft:#e6f3e9;
  --interaction-warning:#8b6500;--interaction-warning-soft:#fff5cf;--interaction-danger:#a5473f;--interaction-focus:#315f86;
  --interaction-shadow:none;--interaction-radius:14px;--interaction-stage-min:360px;--interaction-top-safe:0px;--interaction-bottom-safe:0px;
  display:grid;gap:14px;color:var(--interaction-ink)
}
.sq-ih[data-theme-intensity="subtle"]{--interaction-shadow:0 8px 22px rgba(22,50,68,.07);--interaction-radius:18px}
.sq-ih[data-theme-intensity="immersive"]{--interaction-shadow:0 13px 32px rgba(22,50,68,.12);--interaction-radius:20px}
.sq-ih[data-interaction-theme="neutral"]{--interaction-accent:#596b78;--interaction-accent-soft:#eef1f3;--interaction-manipulable:#e6eaed;--interaction-stage:#fff;--interaction-feedback:#f6f7f8;--interaction-focus:#344957}
.sq-ih-head{display:flex;gap:16px;align-items:flex-start;justify-content:space-between}.sq-ih-head h2{margin:4px 0 5px;font-size:clamp(22px,2.6vw,34px)}.sq-ih-head p{margin:0;color:var(--interaction-muted);max-width:70ch}.sq-ih-kicker{text-transform:uppercase;letter-spacing:.08em;font-size:11px;font-weight:850;color:var(--interaction-accent)}.sq-ih-evidence{font-size:11px;border:1px solid var(--interaction-border);background:var(--interaction-feedback);border-radius:999px;padding:7px 10px;white-space:nowrap}
.sq-ih-layout{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:14px;align-items:stretch}.sq-ih-main{min-width:0;display:grid;grid-template-rows:minmax(var(--interaction-stage-min),1fr) 84px;gap:10px}.sq-ih-stage{min-height:var(--interaction-stage-min);border:1px solid var(--interaction-border);border-radius:var(--interaction-radius);background:var(--interaction-stage);overflow:hidden;position:relative;padding:calc(18px + var(--interaction-top-safe)) 18px calc(18px + var(--interaction-bottom-safe));box-shadow:var(--interaction-shadow)}
.sq-ih-status{height:84px;border:1px solid var(--interaction-border);border-radius:14px;background:var(--interaction-feedback);padding:12px 14px;overflow:auto;line-height:1.45}.sq-ih-status b{color:var(--interaction-accent)}.sq-ih-companion{height:calc(var(--interaction-stage-min) + 94px);min-height:394px;border-radius:var(--interaction-radius);background:var(--interaction-accent-soft);border:1px solid var(--interaction-border);display:grid;grid-template-rows:1fr 82px;align-items:end;justify-items:center;overflow:hidden;padding:12px}.sq-ih-character{height:260px;width:100%;display:grid;place-items:end center;opacity:var(--interaction-companion-presence,.7)}.sq-ih-bubble{height:78px;max-height:78px;width:100%;background:var(--interaction-stage);border:1.5px solid var(--interaction-ink);border-radius:18px;padding:9px 10px;font-size:13px;line-height:1.35;display:grid;overflow:hidden;text-align:center;align-content:center;place-items:center}.sq-ih-companion[data-companion-state="retry"] .sq-ih-bubble{background:var(--interaction-warning-soft)}.sq-ih-companion[data-companion-state="discovery"] .sq-ih-bubble,.sq-ih-companion[data-companion-state="success"] .sq-ih-bubble{background:var(--interaction-success-soft)}
.sq-ih-controls{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.sq-ih-reflection{font-size:13px;color:var(--interaction-muted);margin-left:auto}.sq-ih-unavailable{height:100%;display:grid;place-content:center;gap:6px;text-align:center;color:var(--interaction-muted)}
.sq-mech-toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:16px}.sq-mech-toolbar label{display:flex;gap:7px;align-items:center;font-size:13px;font-weight:700}.sq-mech-toolbar input[type=range]{width:130px;accent-color:var(--interaction-accent)}.sq-mech-toolbar select,.sq-mech-toolbar input[type=number]{border:1px solid var(--interaction-border);border-radius:9px;background:var(--interaction-stage);color:var(--interaction-ink);padding:6px 8px}.sq-mech-btn{border:1px solid var(--interaction-border);background:var(--interaction-stage);border-radius:10px;padding:8px 11px;font-weight:750;color:var(--interaction-ink);cursor:pointer}.sq-mech-btn[aria-pressed=true],.sq-mech-btn.is-active{background:var(--interaction-accent-soft);border-color:var(--interaction-accent)}
.sq-ih :is(button,input,select,textarea):focus-visible{outline:3px solid var(--interaction-focus);outline-offset:2px}
.frac-strip{display:flex;height:80px;border:3px solid var(--interaction-ink);border-radius:12px;overflow:hidden;margin:24px auto 35px;max-width:620px}.frac-part{flex:1;border-right:2px solid var(--interaction-ink);background:var(--interaction-stage)}.frac-part:last-child{border-right:0}.frac-part.filled{background:var(--interaction-manipulable)}.frac-part.filled:after{content:'✓';display:grid;place-items:center;height:100%;font-weight:900;color:var(--interaction-accent)}.frac-line{position:relative;height:72px;margin:0 32px}.frac-line-axis{position:absolute;left:0;right:0;top:31px;height:4px;background:var(--interaction-ink);border-radius:3px}.frac-tick{position:absolute;top:22px;width:2px;height:22px;background:var(--interaction-ink)}.frac-tick span{position:absolute;top:27px;transform:translateX(-50%);white-space:nowrap;font-size:12px}.frac-point{position:absolute;top:20px;width:25px;height:25px;border-radius:50%;background:var(--interaction-warning-soft);border:3px solid var(--interaction-ink);transform:translateX(-50%)}.frac-point.target-mismatch{outline:4px dashed var(--interaction-warning)}.frac-point.target-match{outline:4px solid var(--interaction-success)}.frac-summary{text-align:center;font-weight:800;font-size:18px;margin-top:17px}
/* Tabs, mission, diagram and controls must contribute their full height to the host. */
.circuit-stage{height:auto;display:grid;place-items:center}.circuit-board{width:min(620px,95%);height:230px;position:relative}.circuit-wire{position:absolute;background:var(--interaction-fixed);border:2px solid var(--interaction-ink);border-radius:6px}.circuit-wire.live{background:var(--interaction-accent)}.cw-top{left:90px;right:90px;top:36px;height:8px}.cw-left{left:86px;top:36px;bottom:40px;width:8px}.cw-right{right:86px;top:36px;bottom:40px;width:8px}.cw-bottom-a{left:90px;width:175px;bottom:36px;height:8px}.cw-bottom-b{right:90px;width:175px;bottom:36px;height:8px}.circuit-cell,.circuit-lamp,.circuit-switch,.circuit-bridge,.circuit-connector{position:absolute;display:grid;place-items:center;border:3px solid var(--interaction-ink);background:var(--interaction-stage)}.circuit-cell{left:55px;top:82px;width:70px;height:50px;border-radius:12px;font-weight:900}.circuit-lamp{right:49px;top:78px;width:78px;height:78px;border-radius:50%;font-size:30px}.circuit-lamp.lit{background:var(--interaction-warning-soft);box-shadow:0 0 24px color-mix(in srgb,var(--interaction-warning) 40%,transparent)}.circuit-switch{left:calc(50% - 55px);top:14px;width:110px;height:50px;border-radius:12px}.circuit-bridge{left:calc(50% - 62px);bottom:12px;width:124px;height:58px;border-radius:12px}.circuit-bridge.conductor{background:var(--interaction-success-soft)}.circuit-connector{width:28px;height:28px;border-radius:50%;font-size:12px}.circuit-connector.off{background:var(--interaction-warning-soft)}.circuit-path{font-size:12px;text-align:center;margin-top:3px;color:var(--interaction-muted)}
.ev-passage{font-size:17px;line-height:1.7;max-width:760px;display:grid;gap:8px}.ev-clue{border:1px solid var(--interaction-border);background:var(--interaction-stage);font:inherit;line-height:1.5;padding:8px 10px;border-radius:9px;text-align:left;cursor:pointer}.ev-clue[aria-pressed=true]{background:var(--interaction-warning-soft);border-color:var(--interaction-warning)}.ev-clue[data-quality="supports"][aria-pressed=true]{background:var(--interaction-success-soft);border-color:var(--interaction-success)}.ev-board{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}.ev-board textarea{width:100%;min-height:76px;border:1px solid var(--interaction-border);border-radius:10px;padding:9px;font:inherit}.ev-selected{border:1px dashed var(--interaction-border);border-radius:10px;padding:9px;min-height:76px;font-size:13px}.ev-link{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:7px;align-items:center;margin-top:11px;font-size:12px}.ev-link span{background:var(--interaction-feedback);border:1px solid var(--interaction-border);border-radius:9px;padding:7px}
.alg-grid{display:grid;grid-template-columns:minmax(240px,.9fr) 1.1fr;gap:16px;height:100%}.alg-program,.alg-state{border:1px solid var(--interaction-border);border-radius:12px;padding:12px}.alg-line{padding:8px 10px;border-radius:8px;margin-bottom:5px;font-family:ui-monospace,monospace;display:flex;gap:7px;align-items:center}.alg-line.active{background:var(--interaction-accent-soft);outline:2px solid var(--interaction-accent)}.alg-line.divergence{background:var(--interaction-warning-soft);outline:2px solid var(--interaction-warning)}.alg-line select{min-width:0;max-width:100%;border:1px solid var(--interaction-border);background:var(--interaction-stage);color:var(--interaction-ink);border-radius:8px;padding:5px}.alg-trace{width:100%;border-collapse:collapse;font-size:12px}.alg-trace th,.alg-trace td{border-bottom:1px solid var(--interaction-border);padding:6px;text-align:left}.alg-trace tr.divergence td{background:var(--interaction-warning-soft)}.alg-trace tr.match td{background:var(--interaction-success-soft)}.alg-machine{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-bottom:12px}.alg-value{font-size:28px;font-weight:900;background:var(--interaction-warning-soft);border:1px solid var(--interaction-warning);border-radius:10px;padding:8px 14px}.alg-state-object{display:flex;gap:8px;flex-wrap:wrap}.alg-state-object span{background:var(--interaction-warning-soft);border:1px solid var(--interaction-warning);border-radius:9px;padding:7px 10px}.alg-state-object span b{margin-right:4px}.alg-initial{display:flex;gap:7px;flex-wrap:wrap;margin:8px 0 12px}.alg-initial label{font-size:11px;display:grid;gap:3px}.alg-initial input,.alg-initial select{max-width:95px}
.eq-stack{display:grid;gap:12px;margin:18px 0 28px}.eq-row{display:grid;grid-template-columns:150px minmax(0,1fr) 64px;gap:10px;align-items:center}.eq-strip{height:58px;border:3px solid var(--interaction-ink);border-radius:10px;display:flex;overflow:hidden}.eq-strip i{flex:1;border-right:1px solid var(--interaction-ink);background:var(--interaction-stage)}.eq-strip i:last-child{border-right:0}.eq-strip i.on{background:var(--interaction-manipulable)}
.clause-work{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;margin:40px auto 24px}.clause-card{background:var(--interaction-warning-soft);border:2px solid var(--interaction-ink);border-radius:14px;padding:18px 22px;font-weight:800;min-width:190px;text-align:center}.clause-link{background:var(--interaction-accent-soft);border:2px solid var(--interaction-accent);border-radius:999px;padding:10px 16px;font-weight:900}.clause-result{border:1px solid var(--interaction-border);background:var(--interaction-stage);border-radius:14px;padding:18px;font-size:19px;line-height:1.45;text-align:center;font-weight:750}
.light-model{width:100%;height:min(320px,46vw);min-height:220px}.light-model text{font:700 16px system-ui;fill:var(--interaction-ink)}.light-source{fill:var(--interaction-warning-soft);stroke:var(--interaction-ink)}.light-object{fill:var(--interaction-manipulable);stroke:var(--interaction-ink)}.light-eye{fill:var(--interaction-stage);stroke:var(--interaction-ink)}.light-path-source{stroke:var(--interaction-warning);fill:none}.light-path-reflected{stroke:var(--interaction-accent);fill:none}.light-readout,.map-readout,.timeline-readout,.frame-readout,.audio-readout{margin-top:12px;border-radius:12px;background:var(--interaction-feedback);border:1px solid var(--interaction-border);padding:11px 13px;line-height:1.45}
.map-builder{display:grid;grid-template-columns:minmax(0,1fr) 155px;gap:14px}.map-canvas{height:270px;border:2px solid var(--interaction-ink);border-radius:16px;background:var(--interaction-feedback);position:relative;overflow:hidden}.map-river{position:absolute;left:46%;top:-8%;height:116%;width:42px;background:var(--interaction-manipulable);transform:rotate(8deg);display:grid;place-items:center;font-size:11px;color:var(--interaction-ink)}.map-road.main{position:absolute;left:5%;right:4%;top:49%;height:16px;border-top:4px solid var(--interaction-stage);border-bottom:4px solid var(--interaction-stage);background:var(--interaction-fixed);transform:rotate(-6deg);font-size:10px}.map-trail{position:absolute;left:18%;top:18%;width:55%;height:45%;border:4px dashed var(--interaction-warning);border-color:var(--interaction-warning) transparent transparent var(--interaction-warning);border-radius:50%;font-size:11px}.map-contours{position:absolute;right:7%;top:10%;width:34%;height:36%;border:2px solid var(--interaction-success);border-radius:50%;padding:12px;font-size:11px}.map-flood{position:absolute;left:37%;bottom:5%;width:36%;height:35%;background:var(--interaction-accent-soft);border:2px dashed var(--interaction-accent);border-radius:45%;display:grid;place-items:center;font-size:11px}.map-town{position:absolute;left:16%;top:58%;background:var(--interaction-warning-soft);border:1px solid var(--interaction-warning);border-radius:8px;padding:5px 7px;font-size:11px}.map-detail{position:absolute;right:16%;top:56%;font-size:11px}.map-layers{display:grid;align-content:start;gap:8px;border:1px solid var(--interaction-border);border-radius:12px;padding:10px;background:var(--interaction-stage)}.map-layers label{font-size:12px;text-transform:capitalize}
.timeline-stage{height:280px;position:relative;border:1px solid var(--interaction-border);border-radius:16px;background:var(--interaction-stage);overflow:hidden;margin-top:12px}.timeline-axis{position:absolute;left:6%;right:6%;top:118px;height:5px;background:var(--interaction-ink);border-radius:4px}.timeline-window{position:absolute;top:35px;bottom:25px;border:2px dashed var(--interaction-accent);background:var(--interaction-accent-soft);opacity:.45;pointer-events:none}.timeline-anchor{position:absolute;top:89px;transform:translateX(-50%);min-width:48px;height:48px;border-radius:24px;border:3px solid var(--interaction-ink);background:var(--interaction-warning-soft);font-weight:900;padding:0 8px}.timeline-anchor.focus{outline:5px solid var(--interaction-accent-soft)}.timeline-anchor.learner{background:var(--interaction-manipulable)}.timeline-lane{position:absolute;left:6%;right:6%;bottom:35px;height:48px;border-top:3px solid var(--interaction-accent)}.timeline-lane span{position:absolute;left:0;top:8px;font-size:11px;color:var(--interaction-muted)}.timeline-lane i{position:absolute;top:-11px;width:28px;height:28px;border-radius:50%;background:var(--interaction-accent-soft);border:2px solid var(--interaction-accent);display:grid;place-items:center;font-style:normal}.timeline-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--interaction-muted);margin:3px 6% 0}
.frame-model{width:100%;height:280px}.frame-model line{stroke:var(--interaction-ink);stroke-width:12;stroke-linecap:round}.frame-model line.brace{stroke:var(--interaction-accent);stroke-width:10}.frame-model .load-arrow{stroke:var(--interaction-danger);stroke-width:7;fill:none}.frame-model text{font:700 15px system-ui;fill:var(--interaction-danger)}
.audio-compare{display:grid;gap:18px;max-width:650px;margin:24px auto}.audio-compare label{display:grid;grid-template-columns:100px minmax(0,1fr) 80px;gap:12px;align-items:center;font-weight:800}.audio-compare input{width:100%}.sound-map{display:grid;gap:18px;place-items:center;min-height:240px}.sound-patterns{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.sound-patterns .sq-mech-btn{font-size:24px;min-width:82px}.sound-pending{max-width:650px;border:1px solid var(--interaction-warning);background:var(--interaction-warning-soft);border-radius:14px;padding:16px;line-height:1.5}.sound-pending p{margin:8px 0}
.sq-ih-fallback{border:1px dashed var(--interaction-border);border-radius:12px;padding:9px 12px;background:var(--interaction-feedback)}.sq-ih-fallback summary{cursor:pointer;font-weight:800}.sq-ih-fallback p{margin:8px 0 4px;color:var(--interaction-muted)}
@media(max-width:800px){.sq-ih-layout{grid-template-columns:1fr}.sq-ih-companion{height:140px;min-height:140px;grid-template-columns:100px 1fr;grid-template-rows:1fr;align-items:center;justify-items:center}.sq-ih-character{height:115px}.sq-ih-bubble{height:86px;max-height:86px}.sq-ih-main{grid-template-rows:minmax(var(--interaction-stage-min),auto) 94px}.sq-ih-status{height:94px}.sq-ih-evidence{display:none}.alg-grid{grid-template-columns:1fr}.ev-board{grid-template-columns:1fr}.eq-row{grid-template-columns:1fr}.map-builder{grid-template-columns:1fr}.map-layers{grid-template-columns:repeat(3,1fr)}.audio-compare label{grid-template-columns:80px minmax(0,1fr) 70px}}
@media(max-width:430px){.sq-ih-stage{padding:calc(11px + var(--interaction-top-safe)) 11px calc(11px + var(--interaction-bottom-safe));min-height:var(--interaction-stage-min)}.sq-ih-head h2{font-size:22px}.frac-line{margin-left:20px;margin-right:20px}.circuit-board{transform:scale(.82)}.sq-mech-toolbar{gap:6px}.sq-mech-toolbar input[type=range]{width:100px}.map-layers{grid-template-columns:repeat(2,1fr)}.timeline-stage{height:245px}.eq-strip{height:46px}.audio-compare label{grid-template-columns:1fr}.clause-card{min-width:150px;padding:14px}.ev-link{grid-template-columns:1fr}.ev-link b{display:none}}

/* v4.5.6 Learn experience reset: contain mechanics, protect companion, simplify guided trace */
.sq-ih-layout{isolation:isolate;min-width:0}.sq-ih-main{position:relative;z-index:1;min-width:0;overflow:hidden}.sq-ih-companion{position:relative;z-index:3;min-width:0;background:var(--interaction-accent-soft)}.sq-ih-bubble{position:relative;z-index:4;background:var(--interaction-stage);box-sizing:border-box}.sq-ih-stage{min-width:0}.alg-grid,.alg-program,.alg-state{min-width:0}.alg-program,.alg-state{overflow:auto}.alg-trace{table-layout:fixed}.alg-trace th,.alg-trace td{overflow-wrap:anywhere}
.sq-ih[data-presentation="guided_trace"] .sq-ih-head{display:none}.sq-ih[data-presentation="guided_trace"] .sq-ih-controls [data-ih-formal],.sq-ih[data-presentation="guided_trace"] .sq-ih-reflection{display:none}.sq-ih[data-presentation="guided_trace"]{gap:10px}.sq-ih[data-presentation="guided_trace"] .sq-ih-stage{padding:14px}.sq-ih[data-presentation="guided_trace"] .sq-ih-status{height:72px}.sq-ih[data-presentation="guided_trace"] .sq-ih-main{grid-template-rows:minmax(var(--interaction-stage-min),1fr) 72px}
.alg-guided{display:grid;grid-template-columns:minmax(190px,.65fr) minmax(300px,1.35fr);gap:14px;align-items:start;min-height:100%}.alg-guided-program{display:grid;gap:8px}.alg-guided-label{text-transform:uppercase;letter-spacing:.08em;font-size:10px;font-weight:900;color:var(--interaction-muted)}.alg-guided-line{display:grid;grid-template-columns:28px minmax(0,1fr) 20px;gap:8px;align-items:center;border:2px solid var(--interaction-border);border-radius:11px;background:var(--interaction-stage);padding:9px 10px;font-family:ui-monospace,monospace}.alg-guided-line>span{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--interaction-fixed);font:800 11px system-ui}.alg-guided-line.active{border-color:var(--interaction-accent);background:var(--interaction-accent-soft);box-shadow:0 0 0 2px color-mix(in srgb,var(--interaction-accent) 20%,transparent)}.alg-guided-line.done:not(.active){opacity:.68}.alg-guided-line i{font-style:normal;color:var(--interaction-success);font-weight:900}.alg-guided-world{display:grid;gap:10px;min-width:0}.alg-guided-grid{position:relative;display:grid;grid-template-columns:repeat(5,1fr);aspect-ratio:1/1;max-height:360px;width:min(100%,420px);justify-self:center;border:2px solid var(--interaction-ink);border-radius:15px;overflow:hidden;background:var(--interaction-stage)}.alg-grid-cell{border-right:1px solid var(--interaction-border);border-bottom:1px solid var(--interaction-border);position:relative}.alg-grid-cell:nth-child(5n){border-right:0}.alg-grid-cell small{position:absolute;left:4px;top:3px;font-size:8px;color:var(--interaction-muted)}.alg-guided-robot{position:absolute;left:calc((var(--gx) + .5) * 20%);top:calc((var(--gy) + .5) * 20%);width:42px;height:42px;transform:translate(-50%,-50%);border-radius:50%;border:3px solid var(--interaction-ink);background:var(--interaction-warning-soft);display:grid;place-items:center;box-shadow:0 5px 12px #12253624;transition:left .28s ease,top .28s ease}.alg-guided-robot span{font-size:24px;font-weight:950;color:var(--interaction-accent)}.alg-guided-state{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.alg-guided-state>span{display:grid;gap:2px;border:1px solid var(--interaction-border);border-radius:10px;background:var(--interaction-feedback);padding:8px}.alg-guided-state small{text-transform:uppercase;letter-spacing:.06em;font-size:8px;color:var(--interaction-muted);font-weight:900}.alg-guided-state b{font-size:12px;overflow-wrap:anywhere}.alg-guided-actions{grid-column:1/-1;display:flex;gap:10px;align-items:center;flex-wrap:wrap;border-top:1px solid var(--interaction-border);padding-top:10px}.alg-step-primary{border:2px solid var(--interaction-ink);background:var(--interaction-accent);color:#fff;border-radius:11px;padding:11px 20px;font-weight:950;letter-spacing:.05em;cursor:pointer}.alg-step-primary:disabled{opacity:.45;cursor:default}.alg-guided-question{color:var(--interaction-muted);font-size:13px;font-weight:750}.alg-guided-finish{background:var(--interaction-success-soft);border:1px solid var(--interaction-success);border-radius:10px;padding:8px 11px}.alg-guided-trace{grid-column:1/-1}
@media(max-width:980px){.alg-guided{grid-template-columns:1fr}.alg-guided-actions{grid-column:1}.sq-ih[data-presentation="guided_trace"] .sq-ih-layout{grid-template-columns:minmax(0,1fr) 150px}.sq-ih[data-presentation="guided_trace"] .sq-ih-companion{min-width:0}}
@media(max-width:800px){.sq-ih[data-presentation="guided_trace"] .sq-ih-layout{grid-template-columns:1fr}.sq-ih[data-presentation="guided_trace"] .sq-ih-companion{height:140px;min-height:140px}.alg-guided-grid{max-height:330px}.alg-guided-state{grid-template-columns:1fr 1fr}.alg-guided-state>span:last-child{grid-column:1/-1}}
@media(max-width:430px){.alg-guided-grid{max-height:300px}.alg-guided-robot{width:36px;height:36px}.alg-guided-state{grid-template-columns:1fr}.alg-guided-state>span:last-child{grid-column:auto}}

/* v4.5.8 map model: meaningful scale changes + route/bridge/contour consequences */
.map-toolbar{justify-content:space-between;align-items:end}.map-scale-control{display:grid;grid-template-columns:auto repeat(3,auto);gap:6px;align-items:center}.map-scale-control>span{font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.07em;color:var(--interaction-muted);margin-right:3px}.map-scale-control button{border:1px solid var(--interaction-border);background:var(--interaction-stage);border-radius:9px;padding:7px 9px;font:800 11px system-ui;color:var(--interaction-ink);cursor:pointer}.map-scale-control button[aria-pressed="true"]{background:var(--interaction-manipulable);border-color:var(--interaction-accent);box-shadow:inset 0 0 0 1px var(--interaction-accent)}
.map-builder-v2{grid-template-columns:minmax(0,1fr) 170px}.map-canvas-v2{height:auto;aspect-ratio:760/390;min-height:280px;background:var(--interaction-feedback)}.map-model-svg{width:100%;height:100%;display:block}.map-land{fill:#f7f2df}.map-hillwash{fill:#e7ead9}.map-river-line{fill:none;stroke:#6ebbd5;stroke-width:30;stroke-linecap:round}.map-water-layer text,.map-road-layer text,.map-place-layer text,.map-contour-lines text,.map-warning-label{font:800 12px system-ui;fill:var(--interaction-ink);paint-order:stroke;stroke:#fff;stroke-width:4px;stroke-linejoin:round}.map-bridge rect{fill:#fff7d7;stroke:var(--interaction-ink);stroke-width:3}.map-bridge path{fill:none;stroke:var(--interaction-ink);stroke-width:3}.map-major-road{fill:none;stroke:#fff;stroke-width:18;stroke-linecap:round}.map-major-road+.map-road-outline{stroke:var(--interaction-ink)}.map-minor-road{fill:none;stroke:#f7f7f2;stroke-width:8;stroke-linecap:round;stroke-dasharray:4 4}.map-trail-direct{fill:none;stroke:#ef9f2f;stroke-width:6;stroke-dasharray:12 8;stroke-linecap:round}.map-trail-safe{fill:none;stroke:#405b43;stroke-width:5;stroke-dasharray:5 8;stroke-linecap:round}.map-footpath{fill:none;stroke:#6b7659;stroke-width:3;stroke-dasharray:3 7}.map-no-bridge{fill:#fff5df;stroke:#a74637;stroke-width:3}.map-no-bridge-x{stroke:#a74637;stroke-width:4;stroke-linecap:round}.map-warning-label{fill:#842f26}.map-contour-lines path{fill:none;stroke:#9b7e5c;stroke-width:2.5}.map-flood-layer path{fill:rgba(85,155,205,.24);stroke:#397fa7;stroke-width:3;stroke-dasharray:9 6}.map-flood-layer text{font:800 12px system-ui;fill:#275f7d;paint-order:stroke;stroke:#fff;stroke-width:4px}.map-place-layer circle,.map-place-layer rect,.map-place-layer path{fill:#263f4a;stroke:#fff;stroke-width:2}.map-scale-bar path,.map-north path{fill:none;stroke:var(--interaction-ink);stroke-width:2.5;stroke-linecap:round}.map-scale-bar text,.map-north text{font:900 11px system-ui;fill:var(--interaction-ink)}.map-scale-notice{margin-top:10px;border:1px solid var(--interaction-border);border-radius:11px;background:var(--interaction-stage);padding:9px 11px;font-size:12px;line-height:1.4}.map-layers-v2>b{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--interaction-muted);margin-bottom:2px}
@media(max-width:800px){.map-toolbar{align-items:stretch}.map-scale-control{grid-template-columns:1fr repeat(3,1fr)}.map-scale-control>span{grid-column:1/-1}.map-builder-v2{grid-template-columns:1fr}.map-layers-v2{grid-template-columns:repeat(2,1fr)}.map-layers-v2>b{grid-column:1/-1}.map-canvas-v2{min-height:230px}}
.map-canvas-v2{pointer-events:auto}
/* v4.5.9 map-model refinements: truthful walking network and real contour shapes. */
.map-hillwash-2{opacity:.58}.map-road-outline{fill:none;stroke:#6f7d83;stroke-width:20;stroke-linecap:round}.map-major-road{fill:none;stroke:#fff;stroke-width:14;stroke-linecap:round}.map-bridge.minor rect{fill:#eef7dc}.map-trail-layer .map-footpath.main{stroke-width:3.5}.map-path-label{font:800 11px system-ui;fill:#405b43;paint-order:stroke;stroke:#fff;stroke-width:4px}.map-contour-lines ellipse{fill:none;stroke:#9b7e5c;stroke-width:2.3}

/* v4.5.11 interaction polish: direct fraction manipulation, evidence bridge, guided circuits */
.frac-discovery{display:grid;grid-template-columns:1.15fr .85fr;gap:10px}.frac-control-card,.frac-line-card{border:1px solid var(--interaction-border);border-radius:14px;background:var(--interaction-stage);padding:11px}.frac-control-heading{display:flex;gap:8px;align-items:center}.frac-control-heading>span{width:25px;height:25px;border-radius:50%;display:grid;place-items:center;background:var(--interaction-accent-soft);color:var(--interaction-accent);font-weight:950}.frac-control-heading>div{display:grid;gap:1px}.frac-control-heading small{color:var(--interaction-muted)}.frac-den-buttons{display:flex;gap:5px;flex-wrap:wrap;margin-top:8px}.frac-den-buttons button,.frac-num-stepper button,.circuit-challenge-tabs button,.circuit-materials button{border:1px solid var(--interaction-border);background:var(--interaction-stage);border-radius:9px;padding:7px 9px;font-weight:850;color:var(--interaction-ink);cursor:pointer}.frac-den-buttons button[aria-pressed="true"],.circuit-challenge-tabs button[aria-pressed="true"],.circuit-materials button[aria-pressed="true"]{background:var(--interaction-manipulable);border-color:var(--interaction-accent);box-shadow:inset 0 0 0 1px var(--interaction-accent)}.frac-num-stepper{display:flex;gap:8px;align-items:center;margin-top:8px}.frac-num-stepper button{width:38px;height:38px;font-size:20px;padding:0}.frac-num-stepper strong{min-width:70px;text-align:center;font-size:21px}.frac-same-whole{margin:13px 0 8px}.frac-same-whole>span{display:block;text-align:center;font:900 9px system-ui;letter-spacing:.1em;color:var(--interaction-muted);margin-bottom:5px}.frac-strip-clickable{margin:0 auto;height:76px}.frac-strip-clickable .frac-part{border-top:0;border-bottom:0;border-left:0;cursor:pointer;padding:0}.frac-strip-clickable .frac-part i{font-style:normal;display:grid;place-items:center;height:100%;font-weight:950;color:var(--interaction-accent)}.frac-line-card{margin-top:8px}.frac-line-clickable{margin-bottom:26px}.frac-tick-button{position:absolute;top:19px;transform:translateX(-50%);width:28px;height:45px;border:0;background:transparent;cursor:pointer;padding:0}.frac-tick-button i{display:block;width:14px;height:14px;border-radius:50%;background:var(--interaction-stage);border:3px solid var(--interaction-ink);margin:0 auto 8px}.frac-tick-button.selected i{background:var(--interaction-warning-soft);box-shadow:0 0 0 3px var(--interaction-stage),0 0 0 5px var(--interaction-accent)}.frac-tick-button span{font-size:9px;font-weight:800;color:var(--interaction-muted)}.frac-summary{display:flex;justify-content:center;gap:12px;align-items:center;flex-wrap:wrap;margin-top:5px}.frac-summary b{font-size:22px}.frac-summary span{color:var(--interaction-muted)}.frac-summary em{font-style:normal;border-radius:999px;padding:5px 8px;background:var(--interaction-warning-soft);font-weight:800}.frac-summary.matched em{background:var(--interaction-success-soft);color:var(--interaction-success)}
.ev-fixed-inference{display:grid;gap:4px;border-left:5px solid var(--interaction-accent);background:var(--interaction-accent-soft);border-radius:11px;padding:10px 12px;margin-bottom:11px}.ev-fixed-inference span,.ev-evidence-stack>span,.ev-inference-end>span{font-size:9px;font-weight:950;letter-spacing:.08em;color:var(--interaction-muted)}.ev-clue{display:grid;grid-template-columns:25px 1fr;gap:8px;align-items:start}.ev-clue-num{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--interaction-fixed);font:800 10px system-ui}.ev-clue[aria-pressed=true] .ev-clue-num{background:var(--interaction-accent);color:#fff}.ev-bridge-board{display:grid;grid-template-columns:minmax(0,1fr) 150px minmax(0,.8fr);gap:10px;align-items:stretch;margin-top:12px}.ev-evidence-stack,.ev-inference-end{border:1px solid var(--interaction-border);border-radius:12px;background:var(--interaction-stage);padding:10px;display:grid;gap:6px}.ev-evidence-stack>div{background:var(--interaction-feedback);border-radius:8px;padding:7px;font-size:11px}.ev-evidence-stack em{color:var(--interaction-muted)}.ev-bridge-meter{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:8px auto;gap:5px;align-content:center}.ev-bridge-meter i{height:8px;border-radius:999px;background:var(--interaction-fixed)}.ev-bridge-board[data-strength="some"] .ev-bridge-meter i:first-child,.ev-bridge-board[data-strength="strong"] .ev-bridge-meter i{background:var(--interaction-success)}.ev-bridge-meter b{grid-column:1/-1;text-align:center;font-size:10px}.ev-inference-end{align-content:center}.ev-guidance{margin:8px 0 0}
.circuit-challenge-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:8px}.circuit-challenge-tabs button{display:flex;gap:6px;align-items:center;justify-content:center}.circuit-challenge-tabs button span{width:21px;height:21px;border-radius:50%;display:grid;place-items:center;background:var(--interaction-fixed);font-size:10px}.circuit-mission{display:grid;gap:2px;border-left:4px solid var(--interaction-accent);background:var(--interaction-accent-soft);border-radius:10px;padding:8px 10px;margin-bottom:6px}.circuit-mission span{font-size:12px;color:var(--interaction-muted)}button.circuit-switch{cursor:pointer;color:var(--interaction-ink);font-weight:900}.circuit-materials{display:flex;gap:7px;justify-content:center;flex-wrap:wrap;margin:4px 0 8px}
.sq-ih[data-presentation="fraction_discovery"] .sq-ih-head,.sq-ih[data-presentation="evidence_bridge"] .sq-ih-head,.sq-ih[data-presentation="circuit_guided"] .sq-ih-head{display:none}.sq-ih[data-presentation="fraction_discovery"] .sq-ih-reflection,.sq-ih[data-presentation="evidence_bridge"] .sq-ih-reflection,.sq-ih[data-presentation="circuit_guided"] .sq-ih-reflection{display:none}
@media(max-width:800px){.frac-discovery,.ev-bridge-board{grid-template-columns:1fr}.circuit-challenge-tabs{grid-template-columns:1fr}.ev-bridge-meter{grid-template-columns:1fr 1fr}}
/* v4.5.11 circuit flagship: keep the circuit canvas full-width inside its centered host. */
.circuit-stage>div{width:100%;min-width:0}.circuit-board{margin:0 auto}.circuit-path{max-width:620px;margin:4px auto 0}
.circuit-bridge.plain{height:8px;bottom:36px;border-width:2px;border-radius:6px;background:var(--interaction-fixed);font-size:0}.circuit-bridge.plain.conductor{background:var(--interaction-fixed)}

/* Preserve the diagram's working size; controls stay in normal flow outside its pan area. */
.sq-ih-stage:has(.circuit-stage){container-type:inline-size}
.circuit-canvas{width:100%;overflow-x:auto;overscroll-behavior-x:contain;border-radius:8px}
.circuit-canvas .circuit-board{width:620px;transform:none}
.circuit-canvas:focus-visible{outline:3px solid var(--interaction-focus);outline-offset:-3px}
.circuit-pan-hint{font-size:12px;color:var(--interaction-muted);margin:6px 0 10px;text-align:center}
@container(min-width:620px){.circuit-pan-hint{display:none}}
@container(max-width:430px){.circuit-challenge-tabs{grid-template-columns:1fr}.circuit-materials button{max-width:100%;overflow-wrap:anywhere}}
/* Learn already supplies its own companion; do not reserve an empty inner lane. */
.sq-ih-layout:has(.circuit-stage):not(:has(>.sq-ih-companion)){grid-template-columns:minmax(0,1fr)}

/* Map geometry below crossings; all cartographic names are in a final label plane. */
.map-label-layer text{font:800 13px system-ui;fill:var(--interaction-ink);paint-order:stroke;stroke:var(--interaction-stage);stroke-width:4px;stroke-linejoin:round}
.map-label-layer .map-river-label{fill:#236781}.map-label-layer .map-path-label{fill:#355a3c}.map-label-layer .map-flood-label{fill:#275f7d}
.map-road-layer .map-road-outline{stroke:#596771;stroke-width:14px}.map-road-layer .map-major-road{stroke:#f5d88b;stroke-width:9px}
.map-minor-outline{fill:none;stroke:#75818a;stroke-width:9px;stroke-linecap:round}.map-road-layer .map-minor-road{stroke:#fffdf3;stroke-width:5px;stroke-dasharray:none}
.map-key-backdrop{fill:var(--interaction-stage);opacity:.93;stroke:none}.map-crossings .map-bridge rect{stroke-width:2;fill:#fff9df}.map-crossings .map-bridge path{stroke-width:2}
.sq-ih-stage:has(.map-builder-v2){container-type:inline-size}.sq-ih-layout:has(.map-builder-v2):not(:has(>.sq-ih-companion)){grid-template-columns:minmax(0,1fr)}
.map-canvas-v2{overflow-x:auto;overscroll-behavior-x:contain;min-height:0;aspect-ratio:auto}.map-model-svg{min-width:560px;height:auto;aspect-ratio:760/390}.map-layers label{min-height:44px;align-content:center}.map-canvas-v2:focus-visible{outline:3px solid var(--interaction-focus);outline-offset:-3px}
@container(max-width:640px){.map-builder-v2{grid-template-columns:minmax(0,1fr)}.map-layers-v2{grid-template-columns:repeat(2,minmax(0,1fr))}.map-layers-v2>b{grid-column:1/-1}.map-scale-control{grid-template-columns:1fr repeat(3,1fr)}.map-scale-control>span{grid-column:1/-1}}

.map-pan-note{font-size:12px;line-height:1.4;color:var(--interaction-muted);margin:8px 0}
@container(min-width:760px){.map-pan-note{display:none}}