:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#102044;background:#fff;font-synthesis:none;--blue:#1767e8;--line:#d8e2ef;--muted:#526783;--pale:#f3f8fe}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button,.button{font-size:14px;cursor:pointer;border:1px solid var(--line);border-radius:9px;padding:11px 16px;background:#fff;color:inherit;font-weight:550;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:7px;line-height:1.4}button:hover,.button:hover{background:#eff5ff}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,.scene:focus-visible{outline:3px solid #ec9e3b;outline-offset:3px}button[aria-pressed=true],.primary{background:var(--blue);border-color:var(--blue);color:#fff}button[aria-pressed=true]:hover,.primary:hover{background:#1156c5}.wide{width:100%;padding:14px;font-weight:650}button:disabled{background:#e8eef7;border-color:#e8eef7;color:#64748b;cursor:default}a{color:#1557b0}p{line-height:1.6}h1,h2,h3{line-height:1.25}h1{font-size:clamp(27px,2.7vw,42px);letter-spacing:-1.1px;margin:0 0 10px;font-weight:740}h2{font-size:23px;letter-spacing:-.5px;margin:0 0 14px}h3{font-size:19px;margin:0 0 8px}.site-header{min-height:80px;padding:0 34px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:22px}.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:730;text-decoration:none;color:inherit;white-space:nowrap}.brand svg{width:35px;height:35px;stroke:#1c4682;stroke-width:1.3;fill:none}.brand svg path{fill:var(--blue);stroke:var(--blue)}nav{display:flex;gap:25px;align-self:stretch;align-items:center}nav a{font-size:14px;color:var(--muted);text-decoration:none;padding:29px 0 26px;border-bottom:3px solid transparent;font-weight:550}nav a[aria-current=page]{color:var(--blue);border-color:var(--blue)}.account-link{color:var(--muted);font-size:13px;text-decoration:none;white-space:nowrap}main{max-width:1600px;margin:auto;padding:28px 28px 40px;min-height:calc(100vh - 135px)}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:15px}.breadcrumb{display:flex;gap:10px;font-size:12px;color:var(--muted);margin-bottom:16px}.breadcrumb a{text-decoration:none;color:var(--muted)}.subtitle{font-size:17px;color:var(--muted);margin:0 0 25px;line-height:1.5}.fixture-notice{border:1px solid #dce6f3;border-radius:7px;background:#f8fbff;color:#4a5f7c;font-size:12px;padding:9px 13px;margin:0 0 20px;display:flex;justify-content:space-between;gap:16px;line-height:1.5}.fixture-notice a{white-space:nowrap}.workspace{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(340px,1fr);gap:20px}.viewer{position:relative;display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:13px;background:var(--pale);overflow:hidden;min-height:610px}.toolbar{display:flex;justify-content:space-between;gap:10px;padding:18px 18px 0;z-index:1}.view-tabs{display:flex;gap:8px}.quiet{font-size:13px;background:#ffffffda}.scene{height:480px;position:relative;flex:1;min-height:380px;touch-action:pan-y pinch-zoom;outline-offset:-4px!important}.scene canvas{display:block;width:100%;height:100%}.model-label{position:absolute;z-index:1;pointer-events:none;white-space:nowrap;background:#fff;border:1px solid #2b73d6;border-radius:7px;padding:8px 11px;font-size:14px;font-weight:700;color:#1455b1;transform:translate(-50%,-50%);box-shadow:0 3px 12px #10387410}.chart-stage{height:480px;flex:1;min-height:380px;padding:20px;display:flex;align-items:center;justify-content:center;overflow:hidden}.chart-stage img{width:100%;height:100%;max-height:520px;object-fit:contain}.viewer-bottom{padding:8px 18px 4px;display:flex;align-items:center;justify-content:space-between;gap:12px}.viewer-bottom>span{font-size:11px;color:var(--muted);max-width:65%}.model-note{font-size:11px;color:#5e6f86;text-align:center;padding:0 15px;margin:12px 0 15px}.accessible-note{font-size:12px;padding:12px 18px;border-top:1px solid #dce6f3;background:#f9fbfe;color:var(--muted)}summary{cursor:pointer;width:fit-content;font-weight:600}aside{display:flex;flex-direction:column;gap:16px;min-width:0}.lesson-panel,.reference-panel{border:1px solid var(--line);border-radius:13px;padding:24px;background:white}.lesson-panel{flex:1;min-height:430px;display:flex;flex-direction:column}.mode-tabs{display:flex;gap:7px;margin-bottom:22px;align-items:center;font-size:12px}.mode-tabs a{text-decoration:none;color:var(--muted);padding:7px 14px;border-radius:7px}.mode-tabs a[aria-current=page]{background:var(--blue);color:white}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.panel-heading h2{font-size:22px;margin:0}.panel-heading>span{white-space:nowrap;font-size:13px;color:var(--muted)}.progress-track{height:4px;background:#edf2f8;border-radius:5px;margin:16px 0 22px;overflow:hidden}.progress-track>div{height:100%;background:var(--blue);transition:width .25s}.lesson-text{font-size:19px;line-height:1.5;margin:0 0 20px}.lesson-detail{font-size:14px;line-height:1.65;margin:18px 0}.lesson-graphic{height:112px;display:flex;gap:23px;align-items:center;justify-content:center;background:#f7faff;border-radius:8px;color:#0f5cca;line-height:1.55;font-size:18px}.height-box{border:3px dashed #2467ac;padding:0 8px;font-size:42px;font-family:Georgia,serif}.dashed-circle{width:65px;height:65px;border:3px dashed #1767e8;border-radius:50%;display:grid;place-items:center;font-size:30px}.shield{font-size:42px}.interaction-hint{font-size:12px;color:var(--muted);margin-top:auto;padding-top:10px}.muted{color:var(--muted)}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:19px;line-height:1.45;margin:0 0 23px;padding:0}.answers{display:grid;gap:10px;margin-bottom:20px}.answer{display:flex;gap:10px;align-items:center;border:1px solid var(--line);border-radius:9px;padding:14px;cursor:pointer;line-height:1.45;font-size:15px;min-height:59px}.answer:has(input:checked){border-color:var(--blue);background:#f0f6ff}.answer input{accent-color:var(--blue);width:18px;height:18px;flex-shrink:0;margin:0}.option-letter{font-size:12px;color:var(--muted)}.answer.correct{border-color:#339575;background:#eef9f4}.answer.wrong{border-color:#cd7856;background:#fff5ef}.answer-mark{margin-left:auto;color:#207d60}.feedback{padding:16px;border-radius:8px;background:#eff7ff;color:#25446c;font-size:14px;line-height:1.5;margin-bottom:15px;outline:none}.feedback>strong{display:block;font-size:16px;margin-bottom:5px}.feedback p{margin:8px 0 12px}.feedback.positive{background:#eef9f4}.feedback details{margin:12px 0}.feedback details p strong{display:block;font-size:13px}.sources-inline{display:flex;gap:8px;flex-wrap:wrap;font-size:12px}.reference-panel{padding:22px 24px}.reference-panel h2{font-size:19px}.reference-panel p{font-size:13px;color:var(--muted);margin:0}.sources{margin:24px 0 0;color:var(--muted);font-size:13px;line-height:1.65}.sources p{max-width:970px}.save-status{font-size:11px;color:#427462;margin:12px 0 0;text-align:center}.save-error{margin-top:14px;padding:14px;border:1px solid #d39a70;background:#fff7ee;border-radius:8px;font-size:13px}.save-error p{margin:6px 0 12px}.button-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spread{justify-content:space-between;margin:15px 0}.text-button{background:transparent;border:0;padding:8px 0;font-size:12px;color:var(--muted);justify-content:flex-start;text-align:left;text-decoration:none}.text-button:hover{background:transparent;color:var(--blue)}.question-actions{margin-top:15px;display:flex;gap:20px;align-items:start;flex-wrap:wrap}.question-actions .report{flex:1}.report form{min-width:220px}.report textarea{min-height:90px}.report form label{font-size:12px}.study-context{padding:40px;border:1px solid var(--line);border-radius:13px;background:var(--pale)}.study-context p{color:var(--muted);max-width:520px}.workspace.without-media{grid-template-columns:1fr 1.3fr;max-width:1220px;margin:auto}.mock-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:9px;margin:26px 0}.mock-grid button{padding:12px 5px;position:relative}.mock-grid button.answered{background:#e5f4ec;border-color:#a9d2bd}.mock-grid button[aria-current=step]{border:2px solid var(--blue)}.mock-grid button span{position:absolute;right:2px;top:0;font-size:11px}.timer{font-size:27px;letter-spacing:1px;font-variant-numeric:tabular-nums;padding:15px;border:1px solid var(--line);border-radius:8px}.timer small{display:block;font-size:11px;color:var(--muted);letter-spacing:0;text-align:center}.chart-dialog{width:min(900px,94vw);max-height:95vh;border:1px solid var(--line);border-radius:12px;padding:20px;color:#102044}.chart-dialog::backdrop{background:#061b42b3}.dialog-toolbar{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:12px}.dialog-toolbar h2{margin:0}.zoom-scroll{height:min(65vh,650px);overflow:auto;background:#f3f8fe}.zoom-scroll img{display:block;min-width:100%;object-fit:contain}.course-intro{display:flex;justify-content:space-between;gap:25px;align-items:center;padding:30px;border:1px solid var(--line);background:var(--pale);border-radius:12px;margin:15px 0 38px}.course-intro h2{margin:0}.course-intro p{margin:10px 0 0;font-size:15px}.module{margin-top:35px}.lesson-list,.bank-list,.history-list{border-top:1px solid var(--line)}.lesson-row,.bank-row,.history-row,.form-row{display:flex;align-items:center;gap:22px;padding:25px 16px;border-bottom:1px solid var(--line);color:inherit;text-decoration:none}.lesson-row:hover{background:#f7faff}.lesson-row>div,.bank-row>div,.form-row>div{flex:1}.lesson-row p{margin:0 0 10px;font-size:14px;color:var(--muted);max-width:860px}.step-number{font-size:17px;color:#8297b4;font-variant-numeric:tabular-nums;flex-shrink:0}small{font-size:12px;color:var(--muted)}.setup-layout{display:grid;grid-template-columns:1.6fr 1fr;gap:40px;max-width:1180px}.selection-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}.selection{display:flex;gap:18px;padding:23px 17px;border-bottom:1px solid var(--line);cursor:pointer}.selection h2{font-size:19px;margin:0 0 7px}.selection p{font-size:14px;color:var(--muted);margin:0}.selection input{accent-color:var(--blue);width:18px}.selection.selected{background:#f3f8fe}.setup-panel{align-self:start;border:1px solid var(--line);padding:27px;border-radius:12px;gap:10px}.setup-panel p{font-size:14px}.setup-panel label,label{font-size:13px;font-weight:550}input[type=search],input[type=email],input[type=text],select,textarea{display:block;border:1px solid var(--line);border-radius:8px;background:white;color:#102044;font-size:14px;padding:12px;width:100%;margin-top:8px}select{min-width:0}textarea{resize:vertical}.bank-filters{display:flex;gap:18px;align-items:end;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.search-field{flex:1.5}.bank-filters>label:not(.checkbox-label){flex:1;min-width:130px}.bank-filters>label:first-child{flex:1.7}.checkbox-label{display:flex;align-items:center;gap:8px;padding-bottom:13px}.checkbox-label input{accent-color:var(--blue)}.result-count{font-size:13px;color:var(--muted);margin:22px 0 14px}.bank-row p{font-size:16px;margin:0 0 8px}.bank-row small{font-size:11px}.bank-row>button{flex-shrink:0}.mock-intro{max-width:780px;margin:10px 0 25px}.mock-intro p{color:var(--muted);font-size:15px}.form-list{border:1px solid var(--line);border-radius:12px;overflow:hidden}.form-row{background:#f8fbff;border-bottom:0}.form-row h2{font-size:21px;margin:0}.form-row p{font-size:14px;color:var(--muted)}.history-row{justify-content:space-between;font-size:14px}.progress-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;padding:30px 0 42px;border-top:1px solid var(--line)}.progress-metrics strong{font-size:39px;letter-spacing:-1px}.progress-metrics strong span{font-size:21px;color:#7b8da9}.progress-metrics p{font-size:13px;color:var(--muted);margin:10px 0 0}.skill-table{width:100%;border-collapse:collapse;border-top:1px solid var(--line);margin-top:20px;text-align:left;font-size:14px}.skill-table th,.skill-table td{padding:20px 8px;border-bottom:1px solid var(--line);font-weight:400}.skill-table th:first-child{width:40%}.skill-table-head{font-size:12px;color:var(--muted)}.mobile-cell-label{display:none}.empty-state{padding:60px 20px;text-align:center}.empty-state p{color:var(--muted)}.loading-state{min-height:350px;display:grid;place-content:center;color:var(--muted);text-align:center}.auth-panel{max-width:460px;border:1px solid var(--line);border-radius:13px;padding:34px;margin:30px auto 70px}.auth-panel h1{font-size:29px}.auth-panel p{font-size:14px;color:var(--muted)}.auth-panel .button,.auth-panel>button{margin:12px 0}.auth-divider{text-align:center;margin:18px 0;color:var(--muted);font-size:12px}.auth-panel form{display:grid;gap:16px}.account-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:35px;max-width:1140px}.account-panel{padding:30px;border:1px solid var(--line);border-radius:12px}.account-panel p{font-size:14px;color:var(--muted)}.price{font-size:46px;font-weight:700;letter-spacing:-1px}.price small{font-size:17px;font-weight:400;letter-spacing:0}footer{padding:18px 20px 24px;text-align:center;font-size:11px;color:var(--muted)}.skip{position:fixed;left:20px;top:-100px;z-index:100;background:white;padding:15px}.skip:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
@media(min-width:1450px){.scene,.chart-stage{height:560px}.viewer{min-height:710px}.lesson-panel{padding:30px}.lesson-text,legend{font-size:21px}}
@media(max-width:1100px){.site-header{gap:15px;padding:0 22px}nav{gap:16px}.brand{font-size:19px}.account-link{font-size:12px}.workspace{grid-template-columns:minmax(0,1.5fr) minmax(310px,1fr)}.lesson-panel{padding:21px}.bank-filters{flex-wrap:wrap}.bank-filters .checkbox-label{flex-basis:100%;padding-bottom:0}.mock-grid{grid-template-columns:repeat(5,1fr)}}
@media(max-width:900px){.site-header{flex-wrap:wrap;padding-top:15px;gap:4px 20px}.brand{margin-right:auto}.site-header nav{order:3;width:100%;justify-content:center;gap:30px;overflow-x:auto}.site-header nav a{padding:17px 0 13px;white-space:nowrap}.account-link{margin-left:auto}main{padding:24px 18px 30px}.workspace,.workspace.without-media{grid-template-columns:minmax(0,1fr)}.viewer{min-height:490px}.scene,.chart-stage{height:390px;min-height:320px;flex:none}.lesson-panel{min-height:0}.reference-panel{display:none}.subtitle{font-size:15px}.setup-layout{gap:22px;grid-template-columns:1.3fr 1fr}.fixture-notice{display:block}.fixture-notice a{display:block;white-space:normal;margin-top:5px}.study-context{padding:25px}.mock-grid{grid-template-columns:repeat(8,1fr);max-width:600px}.progress-metrics{gap:20px}.skill-table{font-size:13px}.bank-row{gap:14px}.bank-row>button:last-child{font-size:12px}.account-grid{gap:20px}}
@media(max-width:600px){.site-header{padding:14px 14px 0;gap:10px}.brand{font-size:18px;gap:6px}.brand svg{width:28px;height:28px}.site-header nav{justify-content:space-between;gap:17px}.site-header nav a{font-size:12px;padding-top:11px}.account-link{font-size:11px}.account-link span{display:none}main{padding:20px 12px 24px}h1{font-size:29px;letter-spacing:-.7px}.subtitle{margin-bottom:18px}.breadcrumb{font-size:11px;margin-bottom:12px}.toolbar{padding:12px 10px 0;gap:6px}.toolbar button{padding:9px 10px;font-size:12px}.view-tabs{gap:5px}.viewer{min-height:430px}.scene,.chart-stage{height:310px;min-height:310px}.viewer-bottom{padding:6px 10px;gap:8px}.viewer-bottom button{padding:9px;font-size:11px}.model-note{font-size:10px;margin:10px 0}.lesson-panel{padding:20px}.panel-heading h2{font-size:21px}.model-label{font-size:12px;padding:6px 8px}.accessible-note{padding:12px;font-size:11px}.course-intro{padding:23px;align-items:stretch;flex-direction:column;margin-bottom:28px}.course-intro h2{font-size:22px}.lesson-row{padding:22px 8px;gap:14px}.lesson-row p{font-size:13px}.setup-layout,.account-grid{grid-template-columns:1fr}.setup-panel{padding:22px}.selection{padding:20px 12px}.bank-filters{gap:16px}.bank-filters>label:first-child{flex-basis:100%}.bank-row{flex-wrap:wrap;padding:22px 8px;gap:12px}.bank-row>div{flex-basis:calc(100% - 40px)}.bank-row>button:nth-last-child(2){margin-left:30px}.bank-row>button:last-child{margin-left:auto}.bank-row p{font-size:15px}.form-row{flex-direction:column;align-items:stretch;padding:23px}.form-row h2{font-size:20px}.mock-grid{grid-template-columns:repeat(6,1fr)}.progress-metrics{grid-template-columns:1fr 1fr;padding:25px 0}.progress-metrics strong{font-size:34px}.history-row{font-size:12px;padding:20px 8px;gap:10px}.chart-dialog{padding:12px}.dialog-toolbar{flex-wrap:wrap}.dialog-toolbar h2{font-size:20px}.auth-panel{margin:10px auto 30px;padding:25px}.fixture-notice{font-size:11px}.timer{font-size:20px;padding:10px}.page-heading:has(.timer){align-items:start}.timer small{font-size:10px}.account-panel{padding:23px}footer{font-size:10px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.chart-stage>svg,.zoom-scroll svg,.zoom-scroll img{width:100%;height:auto;display:block}.mock-session-bar{margin:24px 0;padding:24px 0;border-block:1px solid var(--line);display:flex;align-items:center;gap:24px;flex-wrap:wrap}.mock-session-bar .mock-grid{flex:1;min-width:200px}.mock-results{margin:28px 0}.mock-results table{border-collapse:collapse;width:100%;max-width:700px;text-align:left}.mock-results th,.mock-results td{padding:12px;border-bottom:1px solid var(--line)}.mock-results caption{text-align:left;padding:12px 0}.lesson-panel .viewer{margin:20px 0;min-width:0}.lesson-panel .chart-stage{min-height:180px}.lesson-panel .viewer-bottom{flex-wrap:wrap}.viewer video{width:100%;height:auto}.viewer figcaption{padding:20px}


/* Study content follows the same reading order at every screen width. */
.workspace{column-gap:20px;row-gap:0;grid-template-rows:auto 1fr}
.task-intro{grid-column:2;grid-row:1;border:1px solid var(--line);border-bottom:0;border-radius:13px 13px 0 0;padding:24px 24px 0;background:#fff;min-width:0;scroll-margin-top:12px;outline-offset:3px}
.workspace>.viewer,.workspace>.study-context{grid-column:1;grid-row:1 / span 2;align-self:start}
.workspace>aside{grid-column:2;grid-row:2;align-self:start}
.workspace>aside>.lesson-panel{border-top:0;border-radius:0 0 13px 13px;min-height:0;padding-top:0}
.question-prompt{white-space:pre-line;font-size:19px;line-height:1.45;margin:0 0 23px}
.scene.is-interactive{touch-action:none}
.viewer button,.chart-dialog button,.account-link{min-height:44px;min-width:44px}
.account-link{display:inline-flex;align-items:center;justify-content:center}
.accessible-note{padding:0 18px}
.accessible-note summary{padding:12px 0;min-height:44px;line-height:20px}
.interaction-controls{font-size:12px;color:var(--muted);line-height:1.5;padding:0 18px;margin:8px 0 12px}
/* Let the visual determine its height instead of shrinking it into a short box. */
.workspace .viewer{min-height:0}
.workspace .scene{height:auto;min-height:0;aspect-ratio:5/4;flex:none}
.workspace .chart-stage{height:auto;min-height:0;flex:none;display:block;padding:0}
.workspace .chart-stage>img,.workspace .chart-stage>svg{display:block;width:100%;height:auto;max-height:none;object-fit:contain}
.workspace .chart-stage>p{padding:18px}
.workspace .toolbar{padding-bottom:12px}

/* Full-image fit, focal-point zoom, and panning inside the dialog. */
.chart-dialog{width:min(900px,94vw);height:min(860px,94dvh);max-height:94dvh;max-width:100vw;padding:20px}
.chart-dialog[open]{display:flex;flex-direction:column;gap:12px}
.chart-dialog .dialog-toolbar{margin:0;flex-wrap:nowrap}
.zoom-controls{display:flex;gap:10px;align-items:center}
.zoom-controls output{width:52px;text-align:center;font-size:14px;font-variant-numeric:tabular-nums}
.zoom-controls button:last-child{margin-left:auto}
.zoom-scroll{position:relative;flex:1;min-height:0;height:auto;overflow:auto;display:flex;background:var(--pale);touch-action:none;overscroll-behavior:contain;cursor:grab;user-select:none;border-radius:5px}
.zoom-scroll:active{cursor:grabbing}
.zoom-canvas{flex-shrink:0;margin:auto;position:relative}
.zoom-canvas img,.zoom-canvas svg{display:block;width:100%;height:100%;max-width:none;pointer-events:none}
.zoom-help{font-size:12px;color:var(--muted);text-align:center;margin:0;line-height:1.5}

.resume-card{margin-bottom:0;gap:24px}
.resume-thumbnail{width:112px;height:112px;object-fit:cover;border:1px solid var(--line);border-radius:8px}
.resume-description{flex:1;min-width:0}
.resume-card .resume-label{font-size:13px;color:var(--muted);margin:0 0 8px}
.resume-card h2{font-size:25px}
.resume-card progress{display:block;width:100%;max-width:330px;height:5px;margin-top:16px;accent-color:var(--blue);border:0;border-radius:5px;background:#dbe5f2;overflow:hidden}
.resume-card progress::-webkit-progress-bar{background:#dbe5f2}
.resume-card progress::-webkit-progress-value{background:var(--blue)}
.learn-status{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:12px 2px;font-size:13px;color:var(--muted)}
.learn-status p{margin:0}
.learn-status a{min-height:44px;display:inline-flex;align-items:center}
.selection-summary{margin:0 0 8px;color:var(--muted)}

@media(min-width:1450px){.task-intro{padding:30px 30px 0}.question-prompt{font-size:21px}}
@media(max-width:1100px){.task-intro{padding:21px 21px 0}}
@media(max-width:900px){
  .workspace,.workspace.without-media{grid-template-rows:auto;gap:0}
  .task-intro{grid-column:1;grid-row:auto;padding:18px 18px 0}
  .workspace>.viewer{grid-column:1;grid-row:auto;border-radius:0;border-top:0;border-bottom:0;min-height:0}
  .workspace>.study-context{display:none}
  .workspace>aside{grid-column:1;grid-row:auto}
  .workspace>aside>.lesson-panel{padding:16px 18px;border-top:1px solid var(--line)}
  .workspace.without-media>aside>.lesson-panel{border-top:0;padding-top:0}
  .task-intro .progress-track{margin:12px 0}
  .task-intro .lesson-text,.question-prompt{font-size:17px;margin-bottom:16px}
  .lesson-graphic{display:none}
  .lesson-detail{margin:0 0 10px}
  .interaction-hint{padding-top:0;margin:8px 0 12px}
  .study-heading h1{font-size:25px;margin-bottom:5px}
  .study-heading .subtitle{font-size:13px;margin-bottom:12px}
  .study-heading .breadcrumb{margin-bottom:4px}
  .study-heading .breadcrumb a{min-height:44px;display:inline-flex;align-items:center}
}
@media(max-width:600px){
  .site-header{padding-top:6px;gap:4px 10px}
  .site-header nav{gap:8px}
  .site-header nav a{min-width:44px;min-height:44px;text-align:center;padding:12px 0}
  .account-link{font-size:12px}
  .brand{min-height:44px}
  .study-heading h1{font-size:23px;letter-spacing:-.4px}
  .study-heading .subtitle{font-size:12px}
  .study-heading+.fixture-notice{margin-bottom:14px;font-size:11px}
  .task-intro{padding:16px 16px 0}
  .task-intro .panel-heading h2{font-size:18px}
  .task-intro .lesson-text,.question-prompt{font-size:16px;line-height:1.5;margin-bottom:12px}
  .workspace .toolbar{padding:8px 10px}
  .workspace .viewer-bottom{padding:4px 10px 8px}
  .workspace .accessible-note{font-size:12px;padding:0 12px}
  .workspace .accessible-note summary{padding:12px 0}
  .workspace>aside>.lesson-panel{padding:14px 16px}
  .lesson-detail{font-size:14px;line-height:1.5}
  .answer{padding:12px;min-height:52px;font-size:14px}
  .answers{gap:8px;margin-bottom:14px}
  .text-button{min-height:44px}
  .chart-dialog{width:100vw;height:100dvh;max-height:100dvh;border:0;border-radius:0;margin:0;padding:12px;padding-top:max(12px,env(safe-area-inset-top));padding-bottom:max(12px,env(safe-area-inset-bottom))}
  .chart-dialog .dialog-toolbar h2{font-size:20px}
  .resume-card{display:grid;grid-template-columns:64px minmax(0,1fr);padding:20px;gap:16px}
  .resume-thumbnail{width:64px;height:70px;align-self:start;margin-top:24px}
  .resume-description{grid-column:2}
  .resume-card:not(:has(.resume-thumbnail)) .resume-description{grid-column:1/-1}
  .resume-card h2{font-size:21px}
  .resume-card p{font-size:13px;line-height:1.5}
  .resume-card>.button{grid-column:1/-1;min-height:48px}
  .learn-status{font-size:12px;flex-wrap:wrap;gap:4px}
  .skill-table,.skill-table tbody{display:block}
  .skill-table-head{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0)}
  .skill-table-row{display:block;padding:18px 8px;border-bottom:1px solid var(--line)}
  .skill-table th:first-child{width:auto}
  .skill-table tbody th{display:block;font-size:16px;padding:0 0 12px;border:0;font-weight:600}
  .skill-table td{display:grid;grid-template-columns:90px minmax(0,1fr);gap:14px;padding:6px 0;border:0;font-size:14px}
  .mobile-cell-label{display:block;font-size:12px;color:var(--muted)}
}

/* Integrated teaching activities share the approved application palette. */
.interactive-lessons{margin:18px 0 30px}.interactive-lessons>h2{font-size:20px;margin-bottom:16px}.interactive-lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.interactive-lesson-grid>a{display:flex;flex-direction:column;text-decoration:none;color:var(--ink);padding:24px;border:1px solid var(--line);border-radius:12px;background:linear-gradient(145deg,#f4f8ff,#fff 70%)}.interactive-lesson-grid h3{font-size:20px;margin:12px 0}.interactive-lesson-grid p{font-size:14px;line-height:1.6;color:var(--muted);flex:1;margin-top:0}.text-link{color:#2563eb;font-size:13px;font-weight:650}.eyebrow{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#466a99;font-weight:650}.model-badge{display:inline-block;margin-left:10px;border-radius:20px;background:#eaf2ff;color:#315d9c;padding:3px 8px;font-size:10px}.packaged-scene{display:block!important;min-height:0!important}.packaged-scene iframe{display:block;width:100%;border:0}.model-status{padding:14px 18px;font-size:13px;background:#f2f6fd}.simulation,.chart-explorer{display:block!important;min-height:0!important;overflow:hidden}.simulation-heading{padding:22px 22px 14px}.simulation-heading h2{font-size:23px;margin:7px 0 10px}.simulation-heading p{font-size:13px;line-height:1.6;color:#52647d;margin:0}.simulation-stages{display:flex;gap:6px;flex-wrap:wrap;padding:0 18px 15px}.simulation-stages button{font-size:12px;padding:9px 10px}.simulation-stages button[aria-pressed=true]{background:#2563eb;color:white;border-color:#2563eb}.teaching-canvas{height:420px;position:relative;outline-offset:-3px}.teaching-canvas canvas{display:block;width:100%;height:100%;touch-action:inherit}.teaching-toolbar{padding:12px!important;flex-wrap:wrap;border-bottom:1px solid var(--line);background:#f7f9fc}.teaching-toolbar button{font-size:11px;padding:8px}.simulation-controls,.chart-activity{padding:22px}.simulation-controls>label{display:block;font-size:14px;font-weight:600;margin-bottom:7px}.simulation-controls label output{float:right;color:#235abb}.simulation-controls input[type=range]{width:100%;accent-color:#2563eb;min-height:38px}.range-labels{display:flex;justify-content:space-between;font-size:11px;color:#52647d;margin:-2px 0 18px}.simulation-controls p,.chart-activity p{font-size:13px;line-height:1.6}.model-assumption{font-size:11px!important;color:#56657a;background:#f4f7fa;padding:12px;border-radius:6px}.prediction-box{background:#f7f9fd;padding:16px;border:1px solid #d9e3f0;border-radius:9px;margin:20px 0}.prediction-box label,.chart-activity>label{display:block;font-size:14px;font-weight:600;line-height:1.5}.prediction-box textarea,.chart-activity textarea{width:100%;box-sizing:border-box;resize:vertical;min-height:76px;margin:10px 0 0;padding:10px;border:1px solid #bccadd;border-radius:6px;font:14px/1.5 inherit;background:#fff;color:#142947}.prediction-box .muted{font-size:11px}.simulation-result{padding:16px;border:1px solid #c5d9f5;border-left:3px solid #2563eb;border-radius:6px;margin:20px 0;background:#f3f8ff}.simulation-result h3{font-size:16px;margin:0 0 10px}.simulation-result table{width:100%;border-collapse:collapse;font-size:12px}.simulation-result td,.simulation-result th{padding:8px 3px;text-align:left;border-bottom:1px solid #d6e0ed}.simulation-result caption{text-align:left;padding:8px 0;font-size:12px}.simulation-fallback{padding:26px;background:#eef3f9;line-height:1.6;font-size:15px}.simulation-controls .button-row,.chart-activity .button-row{flex-wrap:wrap;margin-top:16px}.simulation-controls button,.chart-activity button{font-size:12px}.chart-task-select{display:block;font-size:12px;padding:0 22px 12px}.chart-task-select select{display:block;width:100%;margin-top:8px}.chart-tools{padding:10px 14px!important;display:flex;flex-wrap:wrap;align-items:center;background:#f5f8fc}.chart-tools output{font-size:12px;min-width:34px}.chart-tools button{font-size:12px;padding:8px}.chart-tools button[aria-pressed=true]{background:#e4edff;border-color:#98b8ef;color:#174c91}.chart-pan{height:540px;overflow:auto;position:relative;background:#e8edf4;overscroll-behavior-x:contain;outline-offset:-4px;touch-action:pan-x pan-y}.chart-sheet{position:relative;min-width:100%;line-height:0;cursor:crosshair}.chart-sheet img{width:100%;display:block;height:auto;max-width:none;user-select:none}.chart-marks{position:absolute;inset:0;pointer-events:none;width:100%;height:100%;max-width:none}.chart-choices{margin:16px 0;border:0;padding:0}.chart-choices legend{font-size:14px;font-weight:650;margin-bottom:10px}.chart-choices label{display:flex;align-items:center;gap:9px;font-size:13px;padding:12px;border:1px solid #d7e0ec;border-radius:7px;margin:7px 0;line-height:1.5}.chart-choices input{accent-color:#2563eb}.chart-activity>.button-row{margin-top:18px}.packaged-scene .accessible-note,.simulation .accessible-note,.chart-explorer .accessible-note{border-top:1px solid var(--line);margin:0}
@media(max-width:900px){.interactive-lesson-grid{gap:10px}.interactive-lesson-grid>a{padding:19px}.teaching-canvas{height:380px}.chart-pan{height:480px}}
@media(max-width:600px){.interactive-lesson-grid{grid-template-columns:1fr}.interactive-lesson-grid>a{padding:20px}.interactive-lesson-grid h3{font-size:20px;margin:9px 0}.interactive-lesson-grid p{margin-bottom:12px}.simulation-heading{padding:18px 15px 12px}.simulation-heading h2{font-size:21px}.simulation-stages{padding:0 12px 12px}.simulation-controls,.chart-activity{padding:16px 13px}.teaching-canvas{height:330px}.chart-pan{height:410px}.chart-task-select{padding:0 15px 12px}.simulation-result{padding:12px}.prediction-box{padding:13px}.chart-choices label{font-size:12px}.simulation-controls .checkbox-label{display:flex;align-items:center;gap:8px}.simulation-controls .checkbox-label input{min-width:16px}}

.skip:not(:focus){clip-path:inset(50%);width:1px;height:1px;padding:0;overflow:hidden}

.lesson-full-instructions{font-size:13px;color:#526783;margin:0 0 18px}.lesson-full-instructions summary{min-height:36px}.lesson-full-instructions p{line-height:1.6}

/* Reading steps do not reserve an empty diagram column. */
.workspace.reading-lesson{grid-template-columns:minmax(0,1fr);max-width:800px}
.workspace.reading-lesson>.task-intro{grid-column:1;grid-row:1}
.workspace.reading-lesson>aside{grid-column:1;grid-row:2}
.prediction-activity{margin-bottom:24px}.prediction-activity label{display:block;margin:18px 0}.prediction-activity textarea{font-weight:400}.prediction-activity .worked-explanation{margin-top:20px;padding:18px;background:var(--pale);border-radius:8px}.prediction-activity .worked-explanation p{margin:0;line-height:1.65}

.realistic-canvas{height:500px;background:#e5ebf2}.realistic-canvas.storm{height:520px}.realistic-canvas canvas{position:absolute;inset:0}.model-loading{position:absolute;z-index:1;top:40%;left:0;width:100%;text-align:center;color:#526783}.balance-modes{margin:0 0 16px}.balance-mode-note{padding:12px 14px;border-left:3px solid #a7bcd5;background:#f5f8fc;font-size:13px}@media(max-width:700px){.realistic-canvas{height:410px}.realistic-canvas.storm{height:440px}.balance-modes button{font-size:12px;padding:9px}}

/* Preserve the approved original chart lesson proportions and short panel. */
.workspace.original-lesson{grid-template-columns:minmax(0,1.85fr) minmax(340px,1fr);width:100%;max-width:none;gap:0 24px}
.original-lesson .lesson-detail{margin:20px 0 30px;line-height:1.65}
.original-lesson .lesson-graphic{margin:6px 0 22px}
.original-lesson .viewer-bottom{flex-wrap:wrap;gap:8px}
.original-lesson .scene{aspect-ratio:1.4!important}
@media(max-width:900px){.workspace.original-lesson{grid-template-columns:minmax(0,1fr)}.original-lesson .scene{aspect-ratio:1.15!important}.original-lesson .lesson-detail{margin:16px 0 22px}}

@media(min-width:901px){.original-study-heading{margin-bottom:14px}.original-study-heading+.fixture-notice{padding:7px 12px;margin-bottom:18px}.original-lesson .scene{aspect-ratio:1.7!important}}

/* Guided lessons use the original large example / short explanation workspace. */
.guided-stage{overflow:hidden;min-width:0;background:#f6f9fc}
.guided-stage-heading{padding:22px 24px 0;background:#fff}
.guided-stage-heading h2{font-size:20px;margin:0 0 6px;letter-spacing:-.3px}
.guided-stage-heading p{font-size:14px;line-height:1.55;margin:0;color:var(--muted)}
.guided-state-controls{display:flex;gap:7px;flex-wrap:wrap;padding:16px 24px;background:white;border-bottom:1px solid var(--line)}
.guided-state-controls button{font-size:13px;padding:10px 14px;min-height:44px;border-radius:7px;flex:1}
.guided-state-controls button[aria-pressed=true],.guided-view-controls button[aria-pressed=true]{background:#e5efff;border-color:#7caae8;color:#124b99}
.guided-model{height:440px;position:relative;min-width:0;display:grid;place-items:center;overflow:hidden;background:#f3f7fb}
.guided-model canvas{width:100%;height:100%;display:block;position:absolute;inset:0}
.guided-model-loading{z-index:1;font-size:14px;padding:15px;background:#ffffffd9;border-radius:8px}
.guided-model-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.guided-model-label{position:absolute;transform:translate(-50%,-100%);background:#ffffffee;box-shadow:0 2px 9px #17355412;border:1px solid #b5c9e1;border-radius:5px;padding:6px 9px;font-size:12px;line-height:1.35;color:#243f63;max-width:175px;text-align:center;white-space:normal}
.guided-view-controls{display:flex;align-items:center;gap:7px;flex-wrap:wrap;padding:12px 20px;background:white;border-top:1px solid var(--line)}
.guided-view-controls>div{display:flex;gap:5px;margin-right:auto}
.guided-view-controls button,.guided-equivalent button{font-size:12px;padding:7px 11px;min-height:40px}
.guided-facts{margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));padding:18px 24px;gap:15px;background:#fff;border-top:1px solid var(--line)}
.guided-facts dt{font-size:12px;line-height:1.4;color:var(--muted);margin-bottom:5px}
.guided-facts dd{font-size:21px;font-weight:650;letter-spacing:-.3px;line-height:1.3;margin:0;overflow-wrap:anywhere}
.guided-equivalent{padding:0 20px;background:#fff;text-align:right}
.guided-equivalent .quiet{border:0;background:transparent;color:var(--muted);text-decoration:underline}
.guided-stage>.accessible-note{background:#fff;padding:0 24px;font-size:12px}
.guided-stage>.accessible-note p{margin:0 0 18px;line-height:1.55}
.guided-chapter{font-size:12px;line-height:1.5;color:var(--muted);margin:0 0 14px}
.workspace.original-lesson.reading-lesson{grid-template-columns:minmax(0,1fr);max-width:900px}
.lesson-update{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:14px 18px;background:#f0f6ff;border:1px solid #bfd3ee;border-radius:9px;margin:0 0 20px}
.lesson-update p{font-size:14px;margin:0}
@media(max-width:600px){.lesson-update{align-items:stretch;flex-direction:column}}
.guided-lesson .lesson-text{font-size:21px;line-height:1.55;margin:0 0 24px}
/* Connected paragraphs need a reading size, not the display size used for one-line captions. */
.guided-lesson .guided-explanation .lesson-text{font-size:18px;line-height:1.6;margin:0 0 16px}
.guided-lesson .guided-explanation{margin-bottom:22px}
@media(max-width:700px){.guided-lesson .guided-explanation .lesson-text{font-size:16.5px;line-height:1.55;margin-bottom:12px}.guided-lesson .guided-explanation{margin-bottom:16px}}
.guided-lesson .panel-heading{align-items:start;gap:16px}
.guided-lesson .panel-heading h2{font-size:25px;line-height:1.2}
.guided-lesson .panel-heading>span{white-space:nowrap;font-size:12px}
.guided-further{font-size:13px;line-height:1.65;color:var(--muted);margin:0 0 24px}
.guided-further summary{min-height:44px;cursor:pointer;padding:10px 0}
.guided-further p{margin:6px 0 12px}
.guided-time-stage{min-height:355px;padding:35px 40px 28px;display:flex;flex-direction:column;justify-content:center}
.guided-time-readout{display:flex;flex-direction:column;gap:8px}
.guided-time-readout strong{font-size:28px;letter-spacing:-.5px}
.guided-time-track{height:10px;position:relative;background:#d3deec;margin:40px 22px 52px;border-radius:5px}
.guided-time-fill{height:100%;background:#236bce;border-radius:5px;transition:width .4s}
.guided-time-pointer{position:absolute;top:-8px;width:26px;height:26px;border:5px solid #fff;background:#236bce;border-radius:50%;transform:translateX(-50%);box-shadow:0 0 0 1px #9bb7db;transition:left .4s}
.guided-time-mark{position:absolute;top:-5px;height:20px;width:1px;background:#7893b6}
.guided-time-mark span{position:absolute;top:30px;left:0;transform:translateX(-50%);font-size:12px;line-height:1.4;width:110px;text-align:center}
.guided-time-unit{text-align:center;font-size:12px;color:var(--muted);margin:15px 0 24px}
.guided-time-comparison{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.guided-time-comparison button{display:flex;flex-direction:column;align-items:start;text-align:left;background:#fff;gap:8px;padding:15px;border-radius:8px}
.guided-time-comparison button.active{border-color:#347ad4;box-shadow:inset 0 -3px #347ad4}
.guided-time-comparison strong{font-size:14px}
.guided-code-stage{min-height:330px;display:flex;flex-direction:column;justify-content:center;padding:35px 30px}
.guided-code-context{font-size:12px;color:var(--muted);margin:0 0 16px}
.guided-code-tokens{display:flex;gap:8px;flex-wrap:wrap;font:600 22px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.3px}
.guided-code-tokens span{padding:5px 7px;border-bottom:3px solid transparent;border-radius:3px}
.guided-code-tokens span.active{background:#d9e8ff;border-color:#1c66c7;color:#124788}
.guided-code-connector{height:35px;border-left:2px solid #7ea7dc;margin:15px 0 0 18px}
.guided-decoded-label{font-size:22px;font-weight:650;margin:12px 0 0}
.guided-note-stage{min-height:340px;display:grid;align-items:center;padding:30px 32px}
.guided-diagram{display:block;width:100%;height:auto;border-bottom:1px solid var(--line)}
.guided-diagram-interactive .guided-diagram{border-bottom:0}
.guided-scene-wrap{position:relative}
.guided-scene-notes{display:flex;flex-wrap:wrap;gap:6px;padding:10px 12px 8px;background:#fff;border-bottom:1px solid var(--line)}
.guided-scene-notes span{background:#fff;border:1px solid #c9d8ec;border-radius:6px;padding:5px 11px;font-size:13px;line-height:1.3;font-weight:600;color:#123f7d;box-shadow:0 2px 6px #0f234a14}
.guided-scene-notes span.accent{background:#fff4e8;border-color:#e5893c;color:#8a4a10}
.guided-diagram-slider{padding:14px 24px 30px;background:#fff;border-bottom:1px solid var(--line)}
.guided-diagram-slider label{display:flex;justify-content:space-between;font-size:14px;font-weight:650;margin-bottom:6px}
.guided-diagram-slider output{font-variant-numeric:tabular-nums;color:#1557b0}
.guided-diagram-slider input{width:100%;height:32px;accent-color:var(--blue);cursor:ew-resize}
.guided-diagram-marks{position:relative;height:34px;font-size:11px;color:var(--muted)}
.guided-diagram-marks span.low{top:16px}
.guided-diagram-marks span{position:absolute;transform:translateX(-50%);white-space:nowrap}
.guided-diagram-interactive+.guided-note-stage{min-height:0;padding-top:24px}
.guided-model+.guided-note-stage,.teaching-canvas+.guided-note-stage,.guided-view-controls+.guided-note-stage,.guided-diagram+.guided-note-stage{min-height:0;padding-top:24px;border-top:1px solid var(--line)}
.guided-note{max-width:64ch;display:grid;gap:18px}
.guided-note h3{font-size:22px;line-height:1.3;font-weight:650;letter-spacing:-.3px;margin:0}
.guided-note-part h4{font-size:12px;font-weight:650;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:0 0 5px}
.guided-note-part p{font-size:17px;line-height:1.55;margin:0}
.guided-note-part.remember{background:#eef4ff;border-left:4px solid #236bce;border-radius:6px;padding:12px 16px}
.guided-note-part.remember p{font-weight:600;color:#123f7d}
.guided-text-scene{padding:32px;min-height:260px;line-height:1.6}
.guided-stage .teaching-canvas{height:400px;min-height:320px;aspect-ratio:auto}
.guided-table-stage{padding:45px 30px;min-height:350px;display:grid;align-items:center}
.guided-table-stage table{width:100%;border-collapse:separate;border-spacing:0;text-align:center;font-size:22px;background:white;border:1px solid #c8d6e8;border-radius:8px;overflow:hidden}
.guided-table-stage caption{text-align:left;font-size:13px;padding:0 0 20px;color:var(--muted)}
.guided-table-stage th,.guided-table-stage td{padding:25px 16px;border-bottom:1px solid #dce5f1;border-right:1px solid #dce5f1;transition:background .2s}
.guided-table-stage th{font-size:16px;font-weight:600}
.guided-table-stage .trace{background:#edf4ff}
.guided-table-stage .selected{background:#236bce;color:white;font-weight:700}
@media(max-width:600px){.guided-table-stage{padding:28px 16px;min-height:290px}.guided-table-stage table{font-size:19px}.guided-table-stage th,.guided-table-stage td{padding:20px 10px}.guided-table-stage th{font-size:13px}.guided-stage .teaching-canvas{height:310px}}
@media(min-width:1600px){.guided-model{height:510px}}
@media(max-width:1100px){.guided-model{height:380px}.guided-state-controls{padding:14px 18px}.guided-stage-heading{padding:18px 18px 0}.guided-note-stage{padding:24px 20px}.guided-lesson .lesson-text{font-size:18px}}
@media(max-width:900px){.guided-lesson .task-intro{border-bottom:1px solid var(--line);padding-bottom:4px}.guided-lesson .lesson-text{margin-bottom:18px}.guided-model{height:420px}.guided-lesson .guided-stage{border-radius:0}.guided-lesson .guided-stage-heading{padding-top:18px}.guided-lesson .guided-chapter{margin-bottom:10px}.guided-lesson .guided-further{margin-bottom:14px}}
@media(max-width:600px){.guided-stage-heading h2{font-size:18px}.guided-stage-heading p{font-size:13px}.guided-state-controls{padding:12px;gap:6px}.guided-state-controls button{font-size:12px;padding:9px;flex-basis:28%}.guided-model{height:310px}.guided-view-controls{padding:9px 12px;gap:6px}.guided-view-controls>div{flex-basis:100%}.guided-view-controls>div>button{flex:1}.guided-view-controls button{min-height:44px}.guided-facts{padding:16px;gap:13px;grid-template-columns:repeat(auto-fit,minmax(90px,1fr))}.guided-facts dd{font-size:18px}.guided-facts dt{font-size:11px}.guided-lesson .panel-heading h2{font-size:21px}.guided-lesson .lesson-text{font-size:17px}.guided-time-stage{padding:25px 18px;min-height:330px}.guided-time-readout strong{font-size:23px}.guided-time-comparison{gap:7px}.guided-time-comparison button{padding:10px}.guided-time-comparison strong{font-size:12px}.guided-time-mark span{width:80px;font-size:11px}.guided-code-stage{padding:28px 18px;min-height:270px}.guided-code-tokens{font-size:17px;gap:3px}.guided-decoded-label{font-size:19px}.guided-note-stage{padding:20px 16px;min-height:0}.guided-note h3{font-size:19px}.guided-note-part p{font-size:16px}}
@media(prefers-reduced-motion:reduce){.guided-time-fill,.guided-time-pointer{transition:none}}

/* Wrap the full mock navigator into touch-sized buttons. */
.mock-session-bar .mock-grid{order:2;flex:1 0 100%;min-width:0;max-width:none;grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:6px;margin:0}
.mock-session-bar .mock-grid button{min-height:44px}
.guided-model canvas,.teaching-canvas canvas,.scene canvas{cursor:grab}
.guided-model canvas:active,.teaching-canvas canvas:active,.scene canvas:active{cursor:grabbing}
.guided-model:focus-visible,.teaching-canvas:focus-visible{outline:3px solid #ec9e3b;outline-offset:-4px}
.model-gesture-hint{font-size:11px;color:var(--muted);margin:0;padding:10px 20px;background:white}
.balance-slider-panel{padding:20px 24px 12px;background:white}
.balance-slider-panel label{display:flex;justify-content:space-between;gap:15px;font-size:14px;font-weight:650}
.balance-slider-panel output{font-variant-numeric:tabular-nums;white-space:nowrap;color:#1557b0}
.balance-slider-panel input{width:100%;height:32px;accent-color:var(--blue);cursor:ew-resize}
.balance-animation-row{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:12px}
.balance-animation-row p{font-size:12px;color:var(--muted);margin:0}
.balance-animation-row button{white-space:nowrap}
.balance-calculation{padding:22px 24px;background:white;border-top:1px solid var(--line)}
.balance-calculation table{width:100%;border-collapse:collapse;font-size:14px;text-align:left;font-variant-numeric:tabular-nums}
.balance-calculation caption{text-align:left;font-size:13px;color:var(--muted);margin-bottom:14px}
.balance-calculation th,.balance-calculation td{padding:12px 10px;border-bottom:1px solid var(--line)}
.balance-calculation thead th{font-size:12px;color:var(--muted)}
.balance-total{background:#eff5ff;font-weight:650}
.balance-equation{background:#e8f1ff;padding:16px;border-radius:8px;margin:18px 0 0;display:grid;gap:6px}
.balance-equation span{font-size:13px}.balance-equation strong{font-size:22px;font-variant-numeric:tabular-nums}
.balance-description{font-size:12px;color:var(--muted);margin-bottom:0}
.balance-support-control{padding:14px 24px;background:white}.balance-support-control button{width:100%}
.balance-observation{padding:20px 24px;background:white;border-top:1px solid var(--line);font-size:16px}
.balance-observation>strong{display:block;font-size:18px;line-height:1.45}.balance-observation p{font-size:14px;line-height:1.55;margin:8px 0 0;color:var(--muted)}
.balance-distance-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px}.balance-distance-pair span{display:block;font-size:12px;color:var(--muted);line-height:1.5}.balance-distance-pair strong{display:block;font-size:28px;margin-top:5px;font-variant-numeric:tabular-nums}.balance-distance-pair>div:last-child strong{color:#a94a12}
.balance-one-calculation>strong{display:block;font-size:23px;line-height:1.5;font-variant-numeric:tabular-nums}.balance-one-calculation p{font-size:14px;margin:0 0 12px}.balance-one-calculation p:last-child{font-size:13px;color:var(--muted);margin:12px 0 0}
.balance-active-row{background:#e8f1ff}.balance-result-meaning{font-size:15px;line-height:1.55;margin:15px 0 0}
.guided-model-label.balance-cg-label{border-color:#cf6b29;color:#963e0b;background:#fff9f0;transform:translate(-50%,0);font-weight:650}
.guided-model-label.balance-support-label{border-color:#1767e8;color:#1557b0}.guided-model-label.balance-load-label{border-color:#6f7c89;color:#253747}.guided-model-label.balance-datum-label{border-color:#8798ad;transform:translate(-50%,0);font-size:11px;padding:3px 6px}
@media(max-width:600px){.balance-slider-panel,.balance-calculation{padding:16px 12px}.balance-slider-panel label{font-size:12px}.balance-calculation table{font-size:11px}.balance-calculation th,.balance-calculation td{padding:10px 5px}.balance-calculation thead th{font-size:10px}.balance-animation-row{flex-wrap:wrap}.balance-equation strong{font-size:19px}}
@media(max-width:600px){.balance-observation,.balance-support-control{padding:16px 12px}.balance-observation>strong{font-size:16px}.balance-one-calculation>strong{font-size:18px}.balance-distance-pair{gap:12px}.balance-distance-pair strong{font-size:25px}}

.guided-table-stage:has(tbody tr:nth-child(10)) th,.guided-table-stage:has(tbody tr:nth-child(10)) td{padding:9px 12px;font-size:14px}

/* Narrated lesson video with live overlays */
.video-lesson{background:#fff}.video-stage{position:relative;aspect-ratio:16/9;background:#f3f8fe;overflow:hidden;border-radius:13px 13px 0 0}.video-stage video{display:block;width:100%;height:100%;background:#f3f8fe}.video-overlay{position:absolute;inset:0;pointer-events:none;font-family:inherit}.video-arrows{position:absolute;inset:0;width:100%;height:100%}.video-label{position:absolute;left:3.5%;top:6%;background:#fff;border:1px solid #2b73d6;border-radius:8px;padding:.5em .8em;font-weight:700;color:#1455b1;font-size:clamp(12px,1.5vw,20px);box-shadow:0 3px 12px #10387418}.video-caption{position:absolute;left:3.5%;bottom:15%;max-width:60%;margin:0;background:#fffffff0;border-radius:8px;padding:.45em .75em;color:#102044;font-size:clamp(12px,1.35vw,19px);line-height:1.4}.video-word{position:absolute;transform:translate(-50%,50%);white-space:nowrap;background:#fffffff0;border-radius:6px;padding:.25em .6em;font-weight:600;font-size:clamp(10px,1.1vw,15px)}.video-card{position:absolute;inset:0;background:#fff;display:flex;flex-direction:column;justify-content:center;padding:6% 8%;gap:.4em;color:#102044}.video-card p{margin:0;font-size:clamp(12px,1.4vw,19px);line-height:1.45;max-width:70%}.video-kicker{color:#526783;font-size:clamp(11px,1.1vw,15px)!important}.video-card-title{font-weight:740;font-size:clamp(18px,2.8vw,40px)!important;letter-spacing:-.02em;line-height:1.2!important}.video-failed{padding:40px 20px;text-align:center;color:#25446c}.video-lesson .viewer-bottom{padding:12px 18px}

/* The period label identifies the teaching state; apparent brightness is not a measurement. */
.light-cycle-caption{display:flex;align-items:baseline;gap:18px;margin:20px 24px 0;padding:14px 0;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.light-cycle-caption strong{font-size:22px;color:var(--ink)}
@media(max-width:600px){.light-cycle-caption{margin:16px 18px 0;align-items:start;flex-direction:column;gap:5px}}

/* Demonstrations contain objects, measurements and controls; prose lives alongside. */
.decision-model{height:450px;background:#e8edf0}
.decision-controls{display:flex;align-items:center;flex-wrap:wrap;gap:10px;padding:16px 20px;background:white;border-top:1px solid var(--line)}
.decision-controls button{font-size:13px;min-height:44px;padding:10px 13px}
.decision-controls output{font-size:13px;color:var(--muted);margin-left:auto}
.clearance-slider{display:grid;gap:8px;flex:1 1 230px;font-size:13px;font-weight:600}
.clearance-slider input{width:100%;accent-color:#246fd1}
.clearance-slider>span{display:flex;justify-content:space-between;font-size:12px;font-weight:400;color:var(--muted)}
.twilight-example{padding:48px 40px 34px;min-height:430px;background:#f4f7fb}
.twilight-clock{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:65px}
.twilight-clock output{font-size:48px;line-height:1;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-1.5px}
.twilight-clock span{font-size:14px;color:#526579}
.twilight-plot{position:relative;height:108px;margin:0 10px 80px;background:linear-gradient(90deg,#dceaf6 0%,#dceaf6 25%,#8b8da9 25%,#4e5477 75%,#1c2e48 75%);border-radius:8px}
.twilight-example.morning .twilight-plot{background:linear-gradient(90deg,#1c2e48 0%,#1c2e48 25%,#4e5477 25%,#8b8da9 75%,#dceaf6 75%)}
.twilight-band{position:absolute;left:25%;right:25%;inset-block:0;display:grid;place-items:center;border-inline:1px solid #ffffffa0}
.twilight-band>span{color:white;font-size:15px;font-weight:550}
.twilight-boundary{position:absolute;top:0;bottom:0;width:1px;background:#ffffff8c}
.twilight-boundary.start{left:25%}.twilight-boundary.end{left:75%}
.twilight-boundary>span{position:absolute;top:122px;left:0;transform:translateX(-50%);white-space:nowrap;text-align:center;font-size:12px;color:#53677e}
.twilight-boundary strong{display:block;font-size:20px;font-weight:550;color:#26394d;margin-top:5px;font-variant-numeric:tabular-nums}
.twilight-flight{position:absolute;top:-14px;bottom:-9px;border-left:3px solid #075ab1;filter:drop-shadow(0 0 2px #fff)}
.twilight-flight>span{position:absolute;top:-21px;left:0;transform:translateX(-50%);font-size:12px;color:#075ab1;font-weight:700}
.twilight-duration{position:absolute;top:-62px;left:25%;right:25%;text-align:center;font-size:12px;color:#526579;border-bottom:1px solid #92a4b8;padding-bottom:9px}
.twilight-example label{display:block;font-size:13px;margin:18px 0 12px}
.twilight-example input{width:100%;accent-color:#075ab1;min-height:24px}
@media(max-width:600px){.decision-model{height:340px}.decision-controls{padding:12px;gap:8px}.decision-controls output{flex-basis:100%;margin-left:0}.twilight-example{padding:32px 20px 25px;min-height:380px}.twilight-clock{margin-bottom:65px;align-items:flex-start}.twilight-clock output{font-size:38px}.twilight-clock span{font-size:12px;max-width:95px;text-align:right}.twilight-band>span{font-size:13px}}

/* Accident-reporting examples: two separate tests and a calendar-day count. */
.reporting-example,.deadline-example{padding:32px 34px 30px;min-height:430px;background:#f4f7fb}
.reporting-verdict{display:flex;flex-direction:column;gap:4px;padding:18px 22px;border-radius:10px;border:1px solid var(--line);background:#fff;margin-bottom:22px}
.reporting-verdict strong{font-size:22px;line-height:1.25;letter-spacing:-.3px}
.reporting-verdict span{font-size:14px;color:var(--muted)}
.reporting-verdict.report{border-color:#e0a25a;background:#fff6ea}
.reporting-verdict.report strong{color:#8a4b08}
.reporting-tests{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.reporting-tests fieldset{margin:0;padding:18px 20px 16px;border:1px solid var(--line);border-radius:10px;background:#fff;min-width:0}
.reporting-tests fieldset.met{border-color:#e0a25a}
.reporting-tests legend{font-size:14px;font-weight:650;padding:0 6px;color:#102044}
.reporting-choice{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:4px 0 12px}
.reporting-choice button{padding:11px 8px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px;font-weight:550;color:#102044;cursor:pointer}
.reporting-choice button[aria-pressed=true]{border-color:var(--blue);background:#eaf2ff;color:#0d4fc0}
.reporting-tests label{display:flex;justify-content:space-between;gap:12px;font-size:14px;margin-top:10px;color:#22365a}
.reporting-tests output{font-weight:650;font-variant-numeric:tabular-nums}
.reporting-tests input[type=range]{width:100%;margin:8px 0 4px;accent-color:var(--blue)}
.reporting-tests p{margin:8px 0 0;font-size:13.5px;line-height:1.45;color:var(--muted)}
.reporting-tests p.reporting-lower{font-size:15px;color:#102044}
.deadline-readout{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px 24px;font-size:17px;margin-bottom:20px}
.deadline-readout strong{font-size:24px;font-variant-numeric:tabular-nums}
.deadline-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.deadline-head{font-size:12px;color:var(--muted);text-align:center;padding-bottom:2px}
.deadline-grid button{position:relative;aspect-ratio:1.55;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:15px;font-weight:550;color:#102044;cursor:pointer;font-variant-numeric:tabular-nums}
.deadline-grid button.weekend{background:#e9eef6}
.deadline-grid button.counting{border-color:#9dbdf3;background:#eaf2ff}
.deadline-grid button.counting.weekend{background:#d9e6fb}
.deadline-grid button.accident{border-color:#102044;background:#102044;color:#fff}
.deadline-grid button.deadline{border-color:#c4701a;background:#e58a2b;color:#fff}
.deadline-grid button small{position:absolute;right:5px;top:3px;font-size:10px;font-weight:600;opacity:.75}
.deadline-example>p{margin:16px 0 0;font-size:13.5px;color:var(--muted)}
@media(max-width:700px){.reporting-example,.deadline-example{padding:20px 16px;min-height:0}.reporting-verdict strong{font-size:18px}.deadline-grid{gap:4px}.deadline-grid button{font-size:13px;aspect-ratio:1.1}.deadline-readout{font-size:15px}.deadline-readout strong{font-size:19px}}
@media(max-width:700px){.compact-labels .guided-model-label{font-size:11px;padding:3px 6px;max-width:120px;line-height:1.25}}

/* Rewritten-lesson explainers (certificate, speed, moisture, cloud temperature) share the reporting panel style. */
.explorer-panel{padding:30px 34px 28px;min-height:430px;background:#f4f7fb}
.explorer-verdict{display:flex;flex-direction:column;gap:4px;padding:16px 20px;border-radius:10px;border:1px solid var(--line);background:#fff;margin-bottom:20px}
.explorer-verdict strong{font-size:21px;line-height:1.25;letter-spacing:-.3px;color:#102044}
.explorer-verdict span{font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.explorer-verdict.warn{border-color:#e0a25a;background:#fff6ea}.explorer-verdict.warn strong{color:#8a4b08}
.explorer-controls{display:grid;gap:4px;margin-bottom:18px}
.explorer-controls.two{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px 26px;margin:20px 0 6px}
.explorer-panel label{display:flex;justify-content:space-between;gap:12px;font-size:14px;font-weight:600;color:#22365a;margin-top:6px}
.explorer-panel output{font-weight:650;font-variant-numeric:tabular-nums;color:#1557b0;white-space:nowrap}
.explorer-panel input[type=range]{width:100%;margin:8px 0 2px;accent-color:var(--blue);min-height:28px}
.explorer-ticks{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding:0 4px;margin-bottom:10px}
.explorer-ticks span.key{color:#102044;font-weight:700}
.explorer-ticks.ends{padding:0;margin-bottom:0}
.explorer-choice{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:6px 0}
.explorer-choice.four{grid-template-columns:repeat(4,1fr);margin:0 0 18px}
.explorer-choice button{padding:11px 8px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px;font-weight:550;color:#102044;min-height:44px}
.explorer-choice button[aria-pressed=true]{border-color:var(--blue);background:#eaf2ff;color:#0d4fc0}
.explorer-rows{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.explorer-rows li{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:9px;background:#fff}
.explorer-rows li div{display:flex;flex-direction:column;gap:2px}
.explorer-rows li strong{font-size:15px;color:#102044}
.explorer-rows li span:not(.explorer-mark){font-size:14px;color:var(--muted);line-height:1.4}
.explorer-mark{flex:none;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-size:14px;font-weight:700;color:#fff;background:#8ea3ba}
.explorer-rows li.yes{border-color:#9fd0b9}.explorer-rows li.yes .explorer-mark{background:#2f8f62}
.explorer-rows li.no .explorer-mark{background:#b3261e}
.explorer-rows li.limited{border-color:#e0a25a}.explorer-rows li.limited .explorer-mark{background:#e58a2b}
.explorer-note{margin:14px 0 0;font-size:13px;line-height:1.45;color:var(--muted)}
.recency-readout{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px 24px;margin-bottom:12px}
.recency-readout span{display:flex;flex-direction:column;font-size:14px;color:var(--muted)}
.recency-readout strong{font-size:22px;color:#102044;letter-spacing:-.3px;font-variant-numeric:tabular-nums}
.recency-readout span:last-child strong{color:#8a4b08}
.recency-issued{margin:0 0 12px;font-size:14px;color:#0d4fc0;font-weight:600}
.recency-grid{display:grid;gap:6px}
.recency-year{display:grid;grid-template-columns:44px repeat(12,1fr);gap:4px;align-items:stretch}
.recency-year-label{font-size:12px;font-weight:650;color:var(--muted);align-self:center}
.recency-month{position:relative;min-height:46px;border:1px solid var(--line);border-radius:7px;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:12px;color:#5b6c84}
.recency-month b{font-weight:600}
.recency-month small{font-size:10px;font-weight:650;color:#1557b0}
.recency-month.counting{border-color:#9dbdf3;background:#eaf2ff;color:#102044}
.recency-month.event{border-color:#102044;background:#102044;color:#fff}
.recency-month.last{border-color:#c4701a;background:#e58a2b;color:#fff}.recency-month.last small{color:#fff}
.recency-month.issued{box-shadow:inset 0 0 0 2px #1767e8}
.recency-month em{position:absolute;left:50%;bottom:calc(100% - 6px);transform:translateX(-50%);font-style:normal;font-size:9.5px;font-weight:700;background:#1767e8;color:#fff;border-radius:4px;padding:1px 4px;white-space:nowrap}
.recency-controls{display:grid;grid-template-columns:auto 1fr;gap:6px 22px;align-items:center;margin-top:16px}
.recency-controls .explorer-choice{margin:0}.recency-controls label{grid-column:2;margin:0}.recency-controls input{grid-column:2}
.recency-controls .explorer-choice{grid-row:1 / span 2}
.speed-track{position:relative;height:150px;margin:18px 6px 8px}
.speed-legal{position:absolute;left:0;top:58px;height:26px;background:#e3efe8;border-radius:6px 0 0 6px}
.speed-limit{position:absolute;top:34px;bottom:30px;border-left:3px solid #b3261e}
.speed-legend{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;margin:4px 0 0;font-size:12.5px;color:#22365a}
.speed-legend>span{display:inline-flex;align-items:center;gap:7px}
.speed-key{display:inline-block;width:18px;height:12px;border-radius:3px}
.speed-key.limit{width:4px;height:16px;background:#b3261e}.speed-key.legal{background:#e3efe8;border:1px solid #b9d8c5}
.speed-shift{position:absolute;top:66px;height:10px;background:repeating-linear-gradient(90deg,#e58a2b 0 8px,transparent 8px 13px);border-radius:3px}
.speed-shift.head{background:repeating-linear-gradient(90deg,#1767e8 0 8px,transparent 8px 13px)}
.speed-marker{position:absolute;top:50px;width:0;height:42px;border-left:3px solid #1767e8}
.speed-marker span{position:absolute;top:44px;left:0;transform:translateX(-50%);font-size:12px;font-weight:650;white-space:nowrap;background:#fff;border:1px solid #9dbdf3;border-radius:5px;padding:3px 7px;color:#0d4fc0}
.speed-marker.ground{border-color:#102044}.speed-marker.ground span{top:-26px;border-color:#102044;color:#102044}
.speed-marker.ground.warn{border-color:#c4701a}.speed-marker.ground.warn span{border-color:#c4701a;color:#8a4b08;background:#fff6ea}
.speed-scale{position:absolute;left:0;right:0;bottom:0;height:16px;border-top:1px solid #b9c7d8}
.speed-scale span{position:absolute;top:2px;transform:translateX(-50%);font-size:11px;color:var(--muted)}
.moisture-bars{display:grid;gap:14px}
.moisture-row{display:grid;grid-template-columns:170px 1fr 120px;gap:12px;align-items:center}
.moisture-name{font-size:14px;font-weight:600;color:#22365a}
.moisture-track{position:relative;height:30px;border-radius:7px;background:#fff;border:1px solid var(--line)}
.moisture-capacity{position:absolute;inset:3px auto 3px 3px;border:2px dashed #1767e8;border-radius:5px;transition:width .35s}
.moisture-vapour{position:absolute;inset:4px auto 4px 4px;background:#7fb0ef;border-radius:4px;transition:width .35s}
.moisture-drops{position:absolute;top:4px;bottom:4px;background:radial-gradient(circle,#1767e8 2.2px,transparent 2.6px) 0 0/8px 8px;border-radius:4px}
.moisture-row output{font-size:14px;text-align:left;white-space:normal}
.temperature-scale{position:relative;height:118px;margin:26px 8px 6px}
.temperature-band{position:absolute;top:34px;height:30px}
.temperature-band.warm{background:#f1e6d8;border-radius:6px 0 0 6px}.temperature-band.liquid{background:#9cc3f2}.temperature-band.mixed{background:linear-gradient(90deg,#b7d3f5,#e3ecf7)}.temperature-band.ice{background:#eef3f8;border-radius:0 6px 6px 0}
.temperature-icing{position:absolute;top:0;height:26px;border-bottom:3px solid #e58a2b}
.temperature-icing span{position:absolute;left:0;top:2px;font-size:12px;font-weight:650;color:#8a4b08;white-space:nowrap}
.temperature-pointer{position:absolute;top:26px;height:46px;border-left:3px solid #102044;transform:translateX(-1.5px)}
.temperature-marks{position:absolute;left:0;right:0;top:74px;height:20px}
.temperature-marks span{position:absolute;transform:translateX(-50%);font-size:11px;color:var(--muted);white-space:nowrap}
.cloud-temperature-example input[type=range]{direction:rtl}
.lesson-photo{margin:0;background:#fff}
.lesson-photo-frame{position:relative;line-height:0}
.lesson-photo-frame>img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.lesson-photo-chip{position:absolute;transform:translate(-50%,-50%);display:flex;align-items:center;gap:7px;max-width:44%;padding:6px 10px 6px 6px;border-radius:7px;background:#ffffffeb;border:1px solid #c9d8ec;box-shadow:0 2px 8px #0f234a26;font-size:13px;line-height:1.3;font-weight:600;color:#123f7d}
.lesson-photo-chip b{flex:none;width:20px;height:20px;border-radius:50%;display:grid;place-items:center;background:#123f7d;color:#fff;font-size:11px}
.lesson-photo-chip.orange{background:#fff4e8f2;border-color:#e5893c;color:#8a4a10}.lesson-photo-chip.orange b{background:#c4701a}
.lesson-photo-chip.blue{background:#e5efffef;border-color:#1767e8;color:#0d4fc0}.lesson-photo-chip.blue b{background:#1767e8}
.lesson-photo-inset{position:absolute;left:14px;top:14px;width:30%;background:#fff;border:1px solid #c9d8ec;border-radius:6px;padding:4px;box-shadow:0 2px 8px #0f234a26;line-height:1.2}
.lesson-photo-inset img{display:block;width:100%;height:auto;border-radius:3px}
.lesson-photo-inset span{display:block;padding:5px 3px 2px;font-size:12px;font-weight:600;color:#123f7d}
.lesson-photo figcaption{padding:10px 18px 12px;border-bottom:1px solid var(--line)}
.lesson-photo-legend{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.lesson-photo-credit{display:block;font-size:11.5px;color:var(--muted)}
@media(max-width:700px){
 .explorer-panel{padding:18px 14px;min-height:0}
 .explorer-verdict{padding:12px 14px}.explorer-verdict strong{font-size:17px}.explorer-verdict span{font-size:13px}
 .explorer-choice button{font-size:13px;padding:9px 6px}
 .explorer-choice.four{grid-template-columns:1fr 1fr}
 .explorer-rows li{padding:10px 12px}.explorer-rows li strong{font-size:14px}.explorer-rows li span:not(.explorer-mark){font-size:13px}
 .recency-readout strong{font-size:18px}
 .recency-year{grid-template-columns:repeat(6,1fr);gap:3px}
 .recency-year-label{grid-column:1 / -1;margin-top:4px}
 .recency-month{min-height:40px;font-size:11px}
 .recency-controls{grid-template-columns:1fr}.recency-controls .explorer-choice,.recency-controls label,.recency-controls input{grid-column:1;grid-row:auto}
 .speed-track{height:156px;margin:18px 2px 6px}
 .speed-marker span{font-size:11px;padding:2px 5px}
 .moisture-row{grid-template-columns:1fr;gap:4px}
 .temperature-icing span{font-size:11px}
 .lesson-photo-chip{padding:0;border-radius:50%;max-width:none;gap:0;background:transparent;border:0;box-shadow:none}
 .lesson-photo-chip>span{display:none}
 .lesson-photo-chip b{width:24px;height:24px;font-size:12px;box-shadow:0 0 0 2px #fff,0 2px 6px #0f234a55}
 .lesson-photo-inset{width:40%;left:auto;right:8px;top:auto;bottom:8px;padding:3px}.lesson-photo-inset span{font-size:10px;padding:3px 2px 1px}
 .lesson-photo figcaption{padding:10px 14px 12px}
 .lesson-photo-legend{position:static;width:auto;height:auto;overflow:visible;clip:auto;white-space:normal;margin:0 0 8px;padding:0;list-style:none;counter-reset:photo;display:grid;gap:6px}
 .lesson-photo-legend li{counter-increment:photo;display:flex;gap:8px;align-items:flex-start;font-size:14px;line-height:1.35;font-weight:600;color:#123f7d}
 .lesson-photo-legend li::before{content:counter(photo);flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:#123f7d;color:#fff;font-size:11px}
 .lesson-photo-legend li.orange{color:#8a4a10}.lesson-photo-legend li.orange::before{background:#c4701a}
 .lesson-photo-legend li.blue{color:#0d4fc0}.lesson-photo-legend li.blue::before{background:#1767e8}
}
.terms-check{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.5;margin:14px 0;text-align:left}.terms-check input{margin-top:3px;flex-shrink:0;width:18px;height:18px}

/* Home, Courses and Questions pages */
.home-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}
.home-card{display:flex;flex-direction:column;gap:10px;padding:24px;border:1px solid var(--line);border-radius:12px;color:inherit;text-decoration:none;background:#fff}
.home-card:hover{background:#f7faff;border-color:#b9cbe3}
.home-card h2{margin:0;font-size:21px}
.home-card p{margin:0;font-size:14px;color:var(--muted);min-height:45px}
.home-card strong{font-size:14px;font-weight:600;margin-top:6px}
.home-card-link{margin-top:auto;padding-top:8px;font-size:14px;font-weight:600;color:#1557b0}
.home-card progress,.course-summary progress,.course-module-head progress{display:block;width:100%;height:5px;accent-color:var(--blue);border:0;border-radius:5px;background:#dbe5f2;overflow:hidden}
.home-card progress::-webkit-progress-bar,.course-summary progress::-webkit-progress-bar,.course-module-head progress::-webkit-progress-bar{background:#dbe5f2}
.home-card progress::-webkit-progress-value,.course-summary progress::-webkit-progress-value,.course-module-head progress::-webkit-progress-value{background:var(--blue)}
.home-links{margin:26px 2px 0;font-size:14px;color:var(--muted)}
.course-summary{display:flex;align-items:center;justify-content:space-between;gap:16px 24px;flex-wrap:wrap;padding:16px 0 20px;border-bottom:1px solid var(--line);font-size:14px}
.course-summary>div:first-child{min-width:230px}
.course-summary progress{margin-top:9px}
.course-filter{display:flex;gap:6px;margin-left:auto}
.course-filter button{padding:8px 14px;font-size:13px}
.course-module{border-bottom:1px solid var(--line)}
.course-module>h2{margin:0;font-size:inherit;letter-spacing:0}
.course-module-head{width:100%;display:grid;grid-template-columns:minmax(0,1fr) 150px 130px 20px;align-items:center;gap:18px;padding:20px 16px;border:0;border-radius:0;background:transparent;text-align:left;justify-content:initial}
.course-module-title{font-size:19px;font-weight:650}
.course-module-count{font-size:13px;color:var(--muted);font-weight:500;text-align:right}
.course-chevron{font-size:20px;color:var(--muted);text-align:center}
.course-module .lesson-list{border-top:1px solid var(--line);margin:0 0 14px}
.lesson-row.compact{padding:14px 16px;gap:16px}
.lesson-row.compact:last-child{border-bottom:0}
.lesson-row.compact h3{font-size:16px;margin:0 0 3px;font-weight:600}
.lesson-status{width:22px;height:22px;flex-shrink:0;border-radius:50%;border:2px solid #b9c7da;display:grid;place-items:center;font-size:13px;font-weight:700;color:#fff}
.lesson-status.done{background:#207d60;border-color:#207d60}
.lesson-status.started{border-color:var(--blue);background:linear-gradient(90deg,var(--blue) 50%,transparent 50%)}
.lesson-state{font-size:13px;color:var(--muted);white-space:nowrap}
.lesson-state.done{color:#207d60;font-weight:600}
.lesson-state.started{color:#1557b0;font-weight:600}
.course-empty{padding:14px 16px;margin:0;font-size:14px}
.question-setup{display:flex;flex-direction:column;gap:20px;max-width:560px}
.question-setup legend{font-size:13px;font-weight:550;margin:0 0 8px}
.length-options{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.length-options button{padding:13px 4px;font-size:15px}
.question-setup p{margin:0}
@media(max-width:900px){.home-cards{grid-template-columns:1fr}.course-module-head{grid-template-columns:minmax(0,1fr) auto 20px;gap:6px 12px}.course-module-head progress{grid-column:1/-1;grid-row:2}}
@media(max-width:600px){.home-card{padding:20px}.course-filter{margin-left:0;width:100%}.course-filter button{flex:1}.course-module-head{padding:18px 8px}.course-module-title{font-size:17px}.lesson-row.compact{padding:14px 8px;gap:12px}.lesson-row.compact .lesson-state:not(.done):not(.started){display:none}}