/* Orange-led themes: semantic tokens keep every workspace readable. */
:root,[data-theme=light]{--ink:#302016;--muted:#76583f;--paper:#ffdfc0;--orange:#b84009;--line:#e0b796;--cream:#ffe5ce;--surface:#fff2e5;--raised:#fff9f2;--soft:#fbd2b0;--accent:#f58232;--on-accent:#28190e;--good:#496f5b;--bad:#bf450f;--hint:#88699f;--shadow:0 8px 24px #7036160a}
[data-theme=dark]{--ink:#fff2e5;--muted:#d0b49d;--paper:#221a15;--orange:#ff9e57;--line:#5d4433;--cream:#3d2b1e;--surface:#2f241c;--raised:#382b21;--soft:#49301e;--accent:#f78739;--on-accent:#23150c;--good:#8ec4a4;--bad:#ff9555;--hint:#b798d0;--shadow:0 8px 24px #0002}
body{background:var(--paper);color:var(--ink)}.shell{grid-template-columns:220px minmax(0,1fr)}.sidebar{background:#e97325;color:#2d190c;padding:26px 18px;gap:20px}.sidebar .brand,.brand{color:#2d190c}.sidebar .brand span{color:#fff0d8}.brand small,.workspace-label,.sidefoot,.sidefoot b,.sidefoot button{color:#4b2916}.nav button{color:#39200f}.nav button.active{background:#352014;color:#fff0e2}.nav button:hover{background:#cf5e17;color:#fff}.sidebar-card{background:#f08a43;border-color:#ca5f1c;margin-top:18px;padding:17px}.sidebar-card .mini,.sidebar-card h3,.sidebar-card p{color:#3e210e}.sidebar-card h3{font-size:17px;line-height:1.4}.topbar{height:52px;padding:0 28px;background:var(--soft);border-color:var(--line);gap:12px}.topbar .breadcrumb,.topbar .breadcrumb b{color:var(--ink)}.topbar>div{min-width:0}.topbar button,.topbar select{font-size:11px;padding:8px 11px}.theme-toggle{white-space:nowrap;border-color:var(--line);background:var(--raised);color:var(--ink)}main{padding:20px 28px 48px}.panel,.stat,.metric,.topic,.question-preview,.role-grid>button{background:var(--surface);color:var(--ink);border-color:var(--line);box-shadow:var(--shadow)}button,input,select,textarea{background:var(--raised);color:var(--ink);border-color:var(--line)}button:hover{background:var(--soft);border-color:var(--orange)}.primary{background:#b84009;border-color:#b84009;color:#fff5e9}.primary:hover{background:#923408}.muted,.qmeta,.stat small,.metric small,.metric>span:not(.metric-icon),.chart-caption{color:var(--muted)}.eyebrow,summary,a{color:var(--orange)}.note{background:var(--cream);border-color:var(--orange);color:var(--ink)}.pill{background:var(--soft);color:var(--ink)}.pill.orange,.badge{background:var(--cream);color:var(--orange)}.selected,.tabs button.selected,.option.selected{background:var(--soft)!important;border-color:var(--orange)!important;color:var(--ink)!important}.option b{background:var(--cream);color:var(--ink)}.bar,.progress{background:var(--soft)}.bar span{background:var(--orange)}.success{color:var(--good)}.error{color:var(--bad)}.subtopic-sidebar{background:var(--surface);border-color:var(--line)}.subtopic-desktop small{color:var(--muted)}.subtopic-desktop button.selected{background:var(--soft)}.selection-review{background:var(--cream)}.selection-review p{border-color:var(--line)}.big-idea,.exit-card,.graph,.feedback-compass>section,.student-box,.student-hero,.teacher-preview,.set-guide,.line-explorer{background:var(--surface);color:var(--ink);border-color:var(--line)}.feedback-compass p,.student-box p,.student-box footer{color:var(--muted)}.welcome>header .brand{color:var(--ink)}.welcome-lead,.welcome-cycle{color:var(--muted)}.role-grid>button b,.role-grid>button>span{color:var(--orange)}.role-grid>button{border-color:var(--line)}.welcome>main{padding-top:35px}.welcome .theme-toggle{margin-left:auto}.welcome>header{gap:18px}.form-grid{gap:16px}
[data-theme=dark] .sidebar{background:#191410;border-right:1px solid var(--line)}[data-theme=dark] .sidebar .brand{color:var(--ink)}[data-theme=dark] .sidebar .brand span{color:var(--accent)}[data-theme=dark] .brand small,[data-theme=dark] .workspace-label,[data-theme=dark] .sidefoot,[data-theme=dark] .sidefoot b,[data-theme=dark] .sidefoot button,[data-theme=dark] .nav button{color:var(--muted)}[data-theme=dark] .nav button.active{background:var(--accent);color:var(--on-accent)}[data-theme=dark] .nav button:hover{background:var(--soft);color:var(--ink)}[data-theme=dark] .sidebar-card{background:var(--surface);border-color:var(--line)}[data-theme=dark] .sidebar-card .mini,[data-theme=dark] .sidebar-card h3,[data-theme=dark] .sidebar-card p{color:var(--ink)}[data-theme=dark] .primary{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}[data-theme=dark] .primary:hover{background:#ffa364}
/* Home explains the product; Lessons is the browsing space. */
.home-banner{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;gap:38px;padding:36px;border-radius:22px;background:#f38a43;color:#2c180d;border:1px solid #d9712a;overflow:hidden}.home-banner h1{font-size:clamp(29px,3.4vw,48px);line-height:1.14;max-width:650px}.home-banner p{max-width:600px;font-size:15px;line-height:1.7}.home-banner .eyebrow{color:#663215}.home-equation{padding:26px;border-radius:20px;border:1px solid #bc6028;display:grid;gap:11px;font:22px Georgia,serif;transform:rotate(-3deg);background:#ffb57d}.home-equation b{font-size:24px;color:#9d3a0c}.home-equation strong{font-size:25px}.section-title{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:26px 0 14px;flex-wrap:wrap}.section-title h2{margin:0}.section-title>span{font-size:12px}.process-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.process-card{text-align:left;padding:22px;border-radius:16px;background:var(--surface);display:flex;flex-direction:column;box-shadow:var(--shadow);white-space:normal}.step-number{display:inline-block;background:var(--soft);border-radius:8px;color:var(--orange);padding:7px 10px;font-size:12px;font-weight:700}.card-icon{font-size:24px;color:var(--orange)}.process-card h3{font-size:18px;margin:22px 0 8px}.process-card p{color:var(--muted);font-size:13px;flex:1;margin:0}.process-card footer{border-top:1px solid var(--line);padding-top:14px;margin-top:18px;color:var(--orange);font-weight:600}.process-card:hover,.workspace-cards>button:hover,.subject-card:hover{transform:translateY(-3px)}.benefit-band{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:23px 0;padding:22px 24px;border-radius:16px;background:var(--soft)}.benefit-band b{font-size:15px}.benefit-band p{margin:5px 0 0;font-size:12px;color:var(--muted)}.workspace-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.workspace-cards>button{padding:22px;text-align:left;border-radius:16px;white-space:normal;background:var(--surface)}.workspace-cards>button>span{display:block;font-size:24px;color:var(--orange);margin-bottom:18px}.workspace-cards h3{font-size:17px}.workspace-cards p{color:var(--muted);font-size:12px}.workspace-cards b{color:var(--orange)}
/* A compact library masthead leaves the content in view. */
.compact-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:0 0 16px;flex-wrap:wrap}.compact-heading h1{font-size:27px;margin:5px 0 0;line-height:1.15}.compact-heading p{font-size:12px;margin:6px 0 0}.compact-heading .eyebrow{font-size:8px}.compact-subject-head{display:flex;align-items:center;gap:14px;min-height:54px;margin:0}.compact-subject-head h1{font-size:26px;margin:0}.compact-subject-head p{font-size:11px;margin:2px 0 0}.compact-subject-head>button:last-child{margin-left:auto}.back-subject{font-size:20px;padding:7px 13px}.workspace-tabs{margin:10px 0 0;gap:8px}.workspace-tabs button{padding:10px 14px}.subject-workspace{margin-top:16px}.subject-workspace>section>.row h2{font-size:18px}.subject-workspace>section>.row p{margin-bottom:4px}.lesson-actions{margin:12px 0}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:0}.subject-card{background:var(--surface);color:var(--ink);border-color:var(--line);box-shadow:var(--shadow)}.subject-card:hover{background:var(--raised)}.subject-picture{height:110px;background:var(--soft)!important;color:var(--orange)!important}.subject-picture svg{max-height:95px}.subject-picture span{font-size:60px}.subject-body{padding:22px}.subject-body h3{font-size:23px}.subject-body p,.subject-body footer{color:var(--muted)}.subject-body footer{border-color:var(--line)}.subject-tags{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}.subject-tags span{background:var(--cream);border:1px solid var(--line);padding:5px 8px;border-radius:6px;font-size:10px;color:var(--ink)}.library-foot{padding:20px 24px;margin-top:22px;background:var(--soft);border-radius:15px}.library-foot p{font-size:12px;margin:5px 0 0;color:var(--muted)}
/* Evidence comes before controls, with graphs and an accessible numeric readout. */
.evidence-source{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:11px;color:var(--muted);margin-bottom:12px}.source-tabs{margin:0}.filter-drawer{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin:0 0 14px}.filter-drawer>summary{display:flex;justify-content:space-between;gap:10px;padding:12px 16px;font-weight:700;font-size:12px;color:var(--ink);list-style:none}.filter-drawer>summary:after{content:'+';color:var(--orange)}.filter-drawer[open]>summary:after{content:'−'}.filter-drawer>summary>span{color:var(--muted);font-size:10px;margin-left:auto}.filter-drawer .report-filters{padding:0 16px 16px;margin:5px 0 0}.report-filters select{padding:9px;font-size:11px}.analytics-view-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.analytics-view-tabs button{padding:14px 18px;text-align:left;background:var(--surface);white-space:normal;min-height:68px}.analytics-view-tabs b,.analytics-view-tabs small{display:block}.analytics-view-tabs b{font-size:12px}.analytics-view-tabs small{font-size:10px;color:var(--muted);margin-top:5px}.stats{margin:16px 0;gap:14px}.stat{padding:16px 20px}.stat strong{font-size:28px;margin:7px 0}.stat>span,.stat small{font-size:11px}.evidence-callout{display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--soft);padding:24px;border:1px solid var(--line);border-radius:16px;margin:20px 0}.evidence-callout h2{margin:7px 0}.evidence-callout p{max-width:800px;margin:7px 0;font-size:13px}.evidence-callout p.mini{font-size:11px;color:var(--muted)}.evidence-callout>button{flex-shrink:0}.analytics-charts{display:grid;grid-template-columns:1.3fr 1fr;gap:18px;align-items:start}.analytics-charts>.panel{margin:0}.chart-panel h2{margin-top:7px;font-size:18px}.legend{display:flex;gap:16px;font-size:10px;color:var(--muted);margin:16px 0;flex-wrap:wrap}.legend>span{display:flex;align-items:center;gap:6px}.legend i{width:10px;height:10px;border-radius:3px;display:inline-block}.correct-key,.correct-fill{background:var(--good)}.wrong-key,.wrong-fill{background:var(--bad)}.ind-key{background:var(--orange)}.hint-key{background:var(--hint)}.bar-axis{display:flex;justify-content:space-between;color:var(--muted);font-size:9px;margin-bottom:8px}.concept-chart-row{display:block;width:100%;text-align:left;padding:12px 0;background:transparent;border:0;border-top:1px solid var(--line);border-radius:0}.concept-chart-row:hover{background:var(--cream)}.concept-chart-row .row{font-size:11px;gap:5px}.concept-chart-row .row b{font-size:12px}.stacked-bar{display:flex;height:16px;border-radius:5px;overflow:hidden;background:var(--soft);margin:9px 0}.stacked-bar span{display:block;height:100%}.concept-chart-row small{color:var(--muted);font-size:10px}.chart-caption{font-size:10px;line-height:1.7}.level-plot{display:flex;height:225px;padding-top:15px;gap:10px}.plot-ticks{display:flex;flex-direction:column;justify-content:space-between;width:34px;padding-bottom:26px;color:var(--muted);font-size:9px}.plot-columns{flex:1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;background:repeating-linear-gradient(to top,transparent 0,transparent calc(25% - 1px),var(--line) 25%);background-size:100% calc(100% - 26px);background-repeat:no-repeat}.plot-category{display:flex;flex-direction:column;align-items:center;min-width:0}.plot-category>b{font-size:10px;height:26px;padding-top:8px}.plot-pair{display:flex;align-items:flex-end;height:100%;width:100%;justify-content:center;gap:8px}.plot-bar{width:35%;max-width:35px;border-radius:5px 5px 0 0;position:relative;min-height:1px}.plot-bar.independent{background:var(--orange)}.plot-bar.hinted{background:var(--hint)}.plot-bar>span{position:absolute;bottom:calc(100% + 4px);left:50%;transform:translateX(-50%);font-size:9px;white-space:nowrap;color:var(--ink)}.level-counts{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:15px 0 0}.level-counts>div{padding:8px;background:var(--cream);border-radius:8px}.level-counts span,.level-counts b{display:block;font-size:9px;line-height:1.8}.level-counts span{color:var(--muted)}.history-plot{display:block;width:100%;max-height:290px;margin-top:20px}.history-plot text{fill:var(--muted);font:11px system-ui}.grid-line{stroke:var(--line);stroke-width:1}.trend-line{fill:none;stroke:var(--orange);stroke-width:3;stroke-linejoin:round}.trend-dot{fill:var(--orange);stroke:var(--surface);stroke-width:2}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;font-size:11px;text-align:left}th,td{padding:10px;border-bottom:1px solid var(--line)}.chart-empty{color:var(--muted)}
/* Expand one concept into a practical teaching response and difficulty choices. */
.followup-box{background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);margin:14px 0}.followup-box>summary{list-style:none;padding:20px;cursor:pointer}.followup-box>summary:hover{background:var(--cream)}.followup-title{display:flex;align-items:center;gap:15px}.followup-title>div{flex:1}.followup-title h3{color:var(--ink);font-size:18px;margin:5px 0}.followup-title p{color:var(--muted);font-size:11px;margin:0}.followup-title .eyebrow{font-size:8px}.open-cue{font-size:11px;color:var(--orange)}.followup-box[open] .open-cue{font-size:0}.followup-box[open] .open-cue:after{content:'Close −';font-size:11px}.followup-content{padding:0 24px 24px;border-top:1px solid var(--line)}.evidence-explanation{padding:20px 0}.evidence-explanation p{font-size:13px;margin:8px 0}.evidence-explanation .mini{font-size:11px}.mini-lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:24px}.mini-lesson-grid>article{background:var(--cream);border:1px solid var(--line);padding:18px;border-radius:13px;min-width:0}.mini-lesson-grid h3{margin:15px 0 8px;font-size:15px}.mini-lesson-grid h4{font-size:12px}.mini-lesson-grid p{font-size:12px}.mini-lesson-grid .math{font-size:18px;overflow-wrap:anywhere}.followup-levels{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0}.followup-levels button{padding:18px;text-align:left;border-radius:12px;white-space:normal;background:var(--raised)}.followup-levels h3{margin-top:12px;font-size:14px}.followup-levels p{font-size:11px;color:var(--muted);margin-bottom:0}.followup-questions>details{border:1px solid var(--line);padding:0 16px;border-radius:12px;background:var(--raised)}.followup-questions>details>summary{font-family:Georgia,serif;font-size:17px;line-height:1.6;padding:14px 0;color:var(--ink)}.followup-questions .badge{font-family:system-ui;font-size:9px;display:inline-block;margin-right:8px}.followup-assign{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px;border-radius:12px;background:var(--soft);margin-top:20px}.followup-assign>div{flex:1}.followup-assign b{font-size:12px}.followup-assign p{color:var(--muted);margin:6px 0 0;font-size:11px}.question-insight{border:1px solid var(--line);border-radius:12px;padding:0 18px;background:var(--raised)}.question-insight>summary{display:flex;align-items:center;gap:12px;color:var(--ink);font-family:Georgia,serif;font-size:17px;padding:16px 0;list-style:none}.question-insight>summary>span:nth-child(2){flex:1}.question-insight>summary>b{font-family:system-ui;font-size:11px;white-space:nowrap;color:var(--bad)}.question-insight>button{margin:0 0 16px}.question-insight p{font-size:12px}.distribution-row{display:grid;grid-template-columns:minmax(80px,1fr) 1fr 45px;gap:12px;align-items:center;font-size:11px;margin:12px 0}.distribution-row>div{height:9px;border-radius:5px;background:var(--soft);overflow:hidden}.distribution-row i{display:block;height:100%;background:var(--orange);border-radius:5px}.distribution-row>span{overflow-wrap:anywhere}.question-insight .note{margin:20px 0}.question-insight h3{font-size:14px}.followup-box summary:focus-visible{outline-offset:-4px}
@media(max-width:1100px){.shell{grid-template-columns:185px minmax(0,1fr)}.process-grid{grid-template-columns:repeat(2,1fr)}.analytics-charts{grid-template-columns:1fr}.mini-lesson-grid{grid-template-columns:1fr}.mini-lesson-grid>article{display:block}.home-banner{gap:20px;padding:26px}.home-equation{font-size:17px}.home-equation strong{font-size:21px}.followup-title .pill{display:none}}
@media(max-width:800px){main{padding:16px 18px 42px}.topbar{padding:0 18px}.home-banner{grid-template-columns:1fr}.home-equation{display:none}.workspace-cards{grid-template-columns:1fr}.benefit-band{grid-template-columns:1fr;gap:13px}.subject-grid{gap:14px}.subject-body{padding:16px}.subject-body h3{font-size:20px}.evidence-callout{align-items:flex-start;flex-direction:column}.followup-levels{grid-template-columns:1fr}.followup-levels button{padding:14px}.followup-levels h3{margin:8px 0 5px}.followup-assign{flex-direction:column;align-items:stretch}.followup-title{gap:10px}.followup-content{padding:0 16px 18px}.analytics-view-tabs button{padding:12px}.analytics-view-tabs small{display:none}.analytics-view-tabs button{min-height:48px}.question-insight>summary{font-size:15px;flex-wrap:wrap}.compact-heading h1{font-size:24px}}
@media(max-width:650px){.shell{display:block}.sidebar{padding:8px 14px;gap:5px}.sidebar .brand{font-size:22px}.sidebar .brand span{font-size:20px}.sidebar .brand small,.workspace-label,.sidebar-card,.sidefoot{display:none}.nav{display:flex;gap:5px;overflow-x:auto}.nav button{padding:6px 10px;font-size:11px}.nav button b{width:19px;font-size:14px}.topbar{height:36px;padding:0 14px;gap:6px}.topbar button{padding:5px 7px;font-size:10px}.topbar .pill,.topbar .breadcrumb{display:none}.topbar .theme-toggle{margin-right:auto}.topbar>div{gap:7px}.topbar select{padding:5px 7px;width:100px}main{padding:12px 14px 35px}.compact-heading{gap:8px;margin-bottom:12px;align-items:flex-start}.compact-heading h1{font-size:22px}.compact-heading p{font-size:10px;line-height:1.5;max-width:280px;margin-top:4px}.compact-heading>.pill{display:none}.compact-subject-head{gap:9px;min-height:42px}.compact-subject-head h1{font-size:22px}.compact-subject-head p{font-size:9px;margin:0}.compact-subject-head .planned-count{display:none}.compact-subject-head>button:last-child{font-size:9px;padding:7px}.back-subject{font-size:17px;padding:6px 10px}.workspace-tabs{margin-top:8px;gap:5px}.workspace-tabs button{font-size:10px;min-width:0;padding:8px 9px}.subject-workspace{margin-top:12px}.subtopic-sidebar{padding:12px}.subject-grid{grid-template-columns:1fr 1fr;gap:10px}.subject-picture{height:75px}.subject-picture svg{max-height:72px}.subject-picture span{font-size:40px}.subject-picture i{font-size:10px}.subject-body{padding:13px}.subject-body h3{font-size:16px}.subject-body p{font-size:10px;min-height:32px}.subject-tags{gap:4px;margin:10px 0}.subject-tags span{font-size:9px;padding:4px 5px}.subject-body footer{font-size:9px;margin-top:12px;padding-top:10px}.library-foot{padding:15px}.home-banner{padding:24px}.home-banner h1{font-size:31px}.home-banner p{font-size:13px}.process-card{padding:17px}.process-card h3{font-size:16px;margin-top:15px}.process-card p{font-size:11px}.process-card footer{font-size:10px}.process-grid{gap:10px}.stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.stat{padding:12px 10px}.stat>span,.stat small{font-size:9px}.stat strong{font-size:23px}.evidence-source{font-size:9px;gap:6px}.evidence-source .pill{font-size:8px}.analytics-view-tabs{gap:5px}.analytics-view-tabs button{padding:10px 8px}.analytics-view-tabs b{font-size:10px}.source-tabs{gap:5px}.source-tabs button{font-size:10px;padding:7px 9px}.filter-drawer>summary{padding:10px 12px;font-size:11px}.filter-drawer>summary>span{font-size:8px}.panel{padding:18px}.followup-box>summary{padding:15px}.followup-title h3{font-size:15px}.followup-title .card-icon{display:none}.followup-title p{font-size:10px}.followup-title .eyebrow{font-size:7px}.followup-title .open-cue{font-size:9px}.followup-questions>details>summary{font-size:16px}.question-insight{padding:0 13px}.level-plot{height:230px}.plot-columns{gap:13px}.plot-pair{gap:6px}.plot-bar>span{font-size:8px}.level-counts>div{padding:6px}.evidence-callout{padding:18px}.evidence-callout h2{font-size:18px}.evidence-callout p{font-size:12px}.chart-panel .row>span{font-size:9px}}
@media(max-width:360px){.subject-grid{grid-template-columns:1fr}.process-grid{grid-template-columns:1fr}.stats{grid-template-columns:1fr}.analytics-view-tabs button{padding:8px 6px}.followup-title{align-items:flex-start}.compact-subject-head>button:last-child{display:none}.level-counts span{font-size:8px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
/* Shared lesson and student controls must inherit the selected theme too. */
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