@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@500;600;700;800&display=swap');
:root{--paper:#f6f5f0;--white:#fff;--ink:#142b33;--muted:#607078;--line:#d9dedb;--green:#1f6c57;--lime:#d4ec93;--orange:#ed9a61;--blue:#286ca4;--navy:#152d36;--danger:#a34332;--soft:#edf2ee;font-family:'DM Sans',Arial,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.4;cursor:default}button{transition:background .15s,color .15s,border .15s}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #529acc;outline-offset:3px}a{color:var(--green)}button,input,select,textarea{border-radius:6px}button{min-height:40px}button:active{transform:translateY(1px)}[hidden]{display:none!important}.skip{position:absolute;top:-50px;left:15px;background:white;padding:12px;z-index:50}.skip:focus{top:10px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:21px 4.2%;border-bottom:1px solid var(--line);background:#faf9f5;gap:15px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-size:15px}.brand strong{font-weight:700;margin-left:5px}.brand-mark{display:grid;place-items:center;width:36px;height:36px;background:var(--ink);color:var(--lime);border-radius:7px;font:27px Georgia,serif}.header-actions{display:flex;align-items:center;gap:20px}.text-button{border:0;background:transparent;color:var(--muted);padding:8px 3px;font-weight:500;font-size:13px}.text-button:hover{color:var(--green)}.outline-button{border:1px solid #b8c5bf;color:var(--ink);background:transparent;padding:8px 15px;font-size:13px}.outline-button span{padding-left:14px}.outline-button:hover{background:#e9eeea}main{max-width:1600px;margin:auto;padding:0 4.2%}.intro{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:42px 0 32px}.eyebrow{font-size:10px;font-weight:800;letter-spacing:1.8px;margin:0 0 11px}.intro h1{font:clamp(30px,3.35vw,50px)/1.15 Georgia,serif;letter-spacing:-1.5px;margin:0 0 12px}.intro em{color:var(--green);font-weight:400}.lede{font-size:14px;color:var(--muted);margin:0}.mission{border-left:2px solid var(--green);padding:3px 0 3px 20px;display:flex;flex-direction:column;gap:7px;max-width:330px}.mission-label{font-size:10px;font-weight:700;letter-spacing:1.5px;color:var(--green)}.mission strong{font-size:15px}.mission>span:last-child{font-size:12px;line-height:1.5;color:var(--muted)}.progress-heading{display:flex;align-items:center;justify-content:space-between;font-size:10px;letter-spacing:1.1px;font-weight:700;margin:8px 0 12px}.subtle{font-weight:400;color:var(--muted);letter-spacing:0;margin-left:8px}#progress-label{color:var(--green);letter-spacing:0;font-size:12px}.steps{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);border-radius:8px;background:white;overflow:hidden;margin-bottom:29px}.step{border:0;border-radius:0;background:white;text-align:left;display:flex;align-items:center;gap:12px;padding:15px 17px;color:var(--muted);font-size:13px;white-space:nowrap}.step+.step{border-left:1px solid var(--line)}.step .number{font:12px 'Manrope',sans-serif;display:grid;place-items:center;width:26px;height:26px;border:1px solid var(--line);border-radius:50%;flex-shrink:0}.step.active{background:var(--green);color:white}.step.active .number{background:var(--lime);color:var(--ink);border-color:var(--lime)}.step.complete:not(.active) .number{background:#e4efe7;border-color:#c8ddcf;color:var(--green)}.step:hover:not(.active){background:#f2f5f1}.workspace{display:grid;grid-template-columns:minmax(350px,.83fr) minmax(480px,1.35fr);gap:36px;align-items:start}.lesson{padding:5px 2px 0 0;min-width:0;scroll-margin-top:15px}.step-kicker{color:var(--green);font-size:11px;font-weight:700;letter-spacing:1.4px;margin:0 0 12px}.lesson h2{font:30px/1.18 Georgia,serif;letter-spacing:-.6px;margin:0 0 18px}.lesson p,.lesson li{font-size:14px;line-height:1.65}.lesson .opening{color:#42565c;font-size:15px;line-height:1.65;margin:0 0 22px}.lesson h3{font-size:14px;margin:20px 0 10px}.concept{padding:16px 18px;background:#eaf0e9;border-left:3px solid #9fba8a;margin:20px 0}.concept p{margin:0;font-size:13px}.concept strong{display:block;color:var(--green);margin-bottom:5px;font-size:12px;letter-spacing:.3px}.equation{font:17px/1.65 Georgia,serif;padding:13px 10px;overflow-wrap:anywhere;text-align:center}.math-text{font-family:Georgia,serif;font-size:16px}.check-block{border-top:1px solid var(--line);padding:17px 0 16px}.check-block h3{margin:0 0 12px;font-size:14px}.check-block p{margin:8px 0 12px;font-size:13px}.choice-grid{display:grid;gap:8px}.choice{display:flex;align-items:center;gap:10px;font-size:13px;background:#fff;border:1px solid var(--line);padding:10px 12px;border-radius:6px;cursor:pointer;line-height:1.4}.choice:has(input:checked){border-color:var(--green);background:#eaf2eb}.choice input{accent-color:var(--green);width:16px;height:16px;flex-shrink:0}.answer{width:82px;min-height:42px;border:1px solid #bcc8c5;background:#fff;padding:8px;text-align:center;color:var(--ink)}.answer:focus{border-color:var(--green)}.matrix{display:inline-grid;grid-template-columns:repeat(2,1fr);gap:7px;padding:7px 13px;position:relative;vertical-align:middle}.matrix:before,.matrix:after{content:'';position:absolute;top:0;bottom:0;width:6px;border:1.5px solid var(--ink)}.matrix:before{left:0;border-right:0}.matrix:after{right:0;border-left:0}.matrix.small{padding:4px 10px;gap:1px 16px;font:18px/1.65 Georgia,serif;text-align:center}.matrix.vector{grid-template-columns:1fr;font:18px/1.5 Georgia,serif;text-align:center;gap:1px}.matrix.vector .answer{width:68px}.matrix-row{display:flex;align-items:center;justify-content:center;gap:12px;margin:15px 0;flex-wrap:wrap}.math-label{font:20px Georgia,serif}.fields-row{display:flex;gap:14px;flex-wrap:wrap;margin:10px 0}.field-label{display:flex;flex-direction:column;gap:7px;font-size:12px;color:var(--muted)}.field-label .answer{width:110px}.check-actions{display:flex;align-items:center;gap:14px;margin-top:13px;flex-wrap:wrap}.check-button{border:1px solid #c1cebd;background:#edf3e8;color:#28563d;padding:7px 13px;font-size:12px;font-weight:700}.check-button:hover{background:#dcebcf}.hint-button,.solution-button{background:none;border:0;font-size:12px;color:var(--muted);min-height:32px;padding:3px}.solution-button{text-decoration:underline}.feedback{font-size:12px;line-height:1.6;padding:11px 13px;margin-top:12px;border-radius:5px;background:#e8eee8;border:1px solid #d4dfd2}.feedback.correct{background:#e4f0df;color:#245531;border-color:#bfd3b3}.feedback.incorrect{background:#fff0e6;color:#854729;border-color:#edc7a9}.feedback.hint{background:#edf1f6;color:#38566e;border-color:#ccd9e4}.reflection{margin:20px 0}.reflection label{display:block;font-size:13px;font-weight:600;line-height:1.6;margin-bottom:8px}.reflection textarea{width:100%;min-height:82px;resize:vertical;border:1px solid #c5cfca;background:#fff;padding:12px;font-size:13px;line-height:1.6}.small-note{font-size:11px!important;color:var(--muted);line-height:1.5!important}.lesson-navigation{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 0;border-top:1px solid var(--line);margin-top:15px}.primary-button{background:var(--green);color:#fff;border:1px solid var(--green);font-size:13px;padding:11px 18px;font-weight:600}.primary-button:hover{background:#17523f}.bench{min-width:0;display:grid;gap:14px}.machine-panel{background:var(--navy);color:white;border-radius:10px;padding:23px 23px 18px;overflow:hidden;box-shadow:0 6px 18px #15302c0b}.bench-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.bench-heading .eyebrow{color:#99c0bd;font-size:9px;margin-bottom:6px}.bench-heading h2{margin:0;font-size:17px;letter-spacing:-.3px;font-weight:500}.live-tag{color:#bbd0c9;font-size:9px;letter-spacing:1.1px;border:1px solid #4c6469;border-radius:4px;padding:5px 8px;white-space:nowrap}.mode-switch{display:flex;gap:3px;margin-top:20px;background:#233e46;border-radius:6px;padding:3px;width:max-content;max-width:100%}.mode-switch button{min-height:31px;font-size:11px;border:0;background:transparent;color:#b2c8cc;padding:7px 14px}.mode-switch button.selected{background:#3c5860;color:white}canvas{display:block;width:100%}#machine{height:215px;margin-top:5px}.machine-caption{display:flex;justify-content:space-between;font-size:9px;color:#9cb5bb;gap:8px;margin:-10px 0 15px;line-height:1.5}.readouts{display:grid;grid-template-columns:1fr 1fr 1.25fr;gap:12px;border-top:1px solid #36505a;padding-top:15px}.readouts>div{display:flex;flex-direction:column;gap:6px}.readouts span{font-size:8px;letter-spacing:1px;color:#9cb5bb}.readouts strong{font:21px 'Manrope',Arial,sans-serif;font-weight:500;white-space:nowrap}.readouts strong small{font-size:10px;color:#a8c0c4}.readouts>div:nth-child(1) strong{color:#b9e0f1}.readouts>div:nth-child(2) strong{color:#f2bb91}.transport{display:flex;align-items:center;gap:10px;margin:21px 0 16px;flex-wrap:wrap}.play-button{background:var(--lime);color:#22372d;border:0;padding:10px 16px;font-size:12px;font-weight:700}.play-button:hover{background:#e1f4b6}.dark-button{background:transparent;color:#b6cdd0;border:0;padding:5px 3px;font-size:11px}.speed-label{margin-left:auto;color:#a9c1c6;font-size:10px;display:flex;align-items:center;gap:6px}.speed-label select{border:1px solid #48616b;color:#e4eded;background:#223e48;padding:6px;font-size:11px}.time-row{display:flex;align-items:center;gap:15px}.time-row label{font-size:10px;color:#a9c1c6;white-space:nowrap;width:86px}.time-row output{display:inline-block;font-variant-numeric:tabular-nums;color:white;margin-left:7px}.time-row input{flex:1;min-width:0;accent-color:var(--lime)}input[type=range]{cursor:pointer;min-height:22px;width:100%;accent-color:var(--green)}.controls-panel{background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px 22px}.control-title{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:17px}.control-title h3{font-size:13px;margin:0}.control-title span{font-size:10px;color:var(--muted)}.slider-label{display:flex;justify-content:space-between;font-size:12px;gap:12px;align-items:center}.slider-label output{font-size:12px;font-weight:700;font-variant-numeric:tabular-nums}.presets{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 10px}.presets button{min-height:28px;padding:5px 9px;border:1px solid #d5ded7;background:#fafbf8;color:#5d6d65;font-size:10px}.presets button.selected{color:var(--green);border-color:var(--green);background:#edf5e8}#stiffness-control{border-top:1px solid var(--line);padding-top:16px;margin-top:14px}.advanced{font-size:11px;border-top:1px solid var(--line);padding-top:13px;margin-top:14px}.advanced summary{cursor:pointer;color:var(--muted)}.advanced-content{padding-top:16px;display:grid;gap:7px}.advanced-content p{font-size:10px;line-height:1.5;color:var(--muted)}.inline-label{display:flex;align-items:center;gap:10px;margin-top:6px}.inline-label select{font-size:11px;background:white;border:1px solid var(--line);padding:5px}.frequency-note{font-size:11px;margin:13px 0 0;color:var(--muted);line-height:1.5}.plot-panel{border:1px solid var(--line);border-radius:8px;background:#fff;padding:18px 18px 12px}.plot-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.plot-heading h3{margin:0;font-size:13px}.plot-tabs{display:flex;gap:3px}.plot-tabs button{border:0;background:transparent;color:var(--muted);font-size:10px;min-height:27px;padding:5px 9px}.plot-tabs button.selected{background:#eaf0eb;color:var(--green)}.legend{display:flex;gap:19px;font-size:10px;margin-top:11px;color:var(--muted);flex-wrap:wrap}.legend span{display:flex;align-items:center;gap:6px}.legend i{display:inline-block;width:17px;border-top:2px solid var(--blue)}.legend i.second{border-top:2px dashed #c47744}.legend i.limit{border-top:1px dashed #9c655a}#plot{height:220px;margin-top:6px}.plot-help{font-size:10px;color:var(--muted);margin:5px 0 0;line-height:1.5}#test-results{border-top:1px solid var(--line);margin-top:16px;padding-top:15px}.result-status{font-size:13px;font-weight:700;display:flex;align-items:center;gap:8px}.status-dot{width:7px;height:7px;border-radius:50%;background:currentColor}.pass{color:#28704c}.fail{color:#a34332}.pending{color:#8d6423}.result-detail{font-size:11px;line-height:1.6;color:var(--muted);margin:7px 0 12px}.result-table{width:100%;border-collapse:collapse;font-size:11px}.result-table th{text-align:right;font-weight:500;color:var(--muted);font-size:10px;line-height:1.5}.result-table th:first-child,.result-table td:first-child{text-align:left}.result-table td{text-align:right;padding:9px 3px;border-top:1px solid #e6e9e5;font-variant-numeric:tabular-nums}.result-table tr:last-child td{font-weight:700}.result-table tr:last-child{background:#f3f6f0}.micro-label{font-size:10px;color:var(--muted)}.help-details{font-size:12px;margin:16px 0}.help-details summary{cursor:pointer;color:var(--green)}.help-details p{font-size:12px}.mode-description{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mode-description>div{border:1px solid var(--line);background:#fff;border-radius:6px;padding:12px}.mode-description .matrix-row{margin:8px 0}.mode-description p{font-size:12px;margin:5px 0}.law{font-size:13px;padding:14px 0}.law span{color:var(--muted);display:block;font-size:11px;margin-top:5px}footer{display:flex;justify-content:space-between;gap:20px;padding:24px 0;border-top:1px solid var(--line);margin-top:38px;color:#7b8988;font-size:10px;line-height:1.6}dialog{border:1px solid #cad4cd;border-radius:12px;background:var(--paper);color:var(--ink);padding:0;width:min(760px,calc(100vw - 28px));max-height:88vh;box-shadow:0 30px 100px #102f3655}dialog::backdrop{background:#0e273566;backdrop-filter:blur(3px)}.dialog-header{display:flex;justify-content:space-between;gap:20px;align-items:start;padding:24px 28px 18px;border-bottom:1px solid var(--line)}.dialog-header h2{font:26px/1.2 Georgia,serif;margin:0}.close-dialog{border:0;background:transparent;font-size:27px;color:var(--muted);padding:0 6px;min-height:30px}.dialog-content{padding:8px 28px 25px;font-size:14px;line-height:1.7}.dialog-content h3{font-size:16px;margin:22px 0 10px}.dialog-content table{width:100%;font-size:12px;border-collapse:collapse}.dialog-content th{text-align:left;background:#e9eee6}.dialog-content th,.dialog-content td{border-bottom:1px solid var(--line);padding:9px}.dialog-content .small{font-size:11px;color:var(--muted)}.dialog-footer{border-top:1px solid var(--line);padding:17px 28px;display:flex;align-items:center;justify-content:space-between}.notebook-answer{border-left:2px solid #c4d1bd;padding-left:13px;white-space:pre-wrap;font-size:13px}.notebook-status{font-size:11px}.notebook-blank{color:var(--muted);font-style:italic}.name-line{margin:15px 0 20px;font-size:13px}.notebook-settings{font-size:12px;color:var(--muted)}#print-area{display:none}button,input,select{touch-action:manipulation}
@media(min-width:1350px){.workspace{gap:50px}.lesson{padding-right:10px}.bench{position:sticky;top:15px}}
@media(max-width:1100px){.step{padding:12px 9px;gap:6px;font-size:11px}.workspace{grid-template-columns:minmax(300px,.85fr) minmax(400px,1.15fr);gap:23px}.machine-panel{padding:20px 17px 16px}.mission{max-width:260px}.intro h1{font-size:36px}.readouts strong{font-size:18px}.matrix .answer{width:68px}.lesson h2{font-size:27px}}
@media(max-width:850px){.workspace{grid-template-columns:1fr}.lesson{max-width:none}.bench{position:static}.intro{align-items:start;padding-top:30px}.mission{max-width:240px}.step{white-space:normal;line-height:1.3}.step span:last-child{max-width:90px}.lesson h2{font-size:30px}.mode-description{max-width:470px}.check-block{max-width:100%}.matrix .answer{width:82px}.lesson-navigation{margin-bottom:4px}.bench{max-width:100%}.intro h1{font-size:34px}.header-actions{gap:12px}#machine{height:230px}}
@media(max-width:580px){main{padding:0 18px}.topbar{padding:15px 18px}.brand{font-size:12px;gap:8px}.brand strong{display:block;margin:2px 0 0}.brand-mark{width:33px;height:33px}.header-actions{gap:10px}.header-actions .text-button{font-size:11px;max-width:49px;line-height:1.3}.outline-button{padding:7px 10px;font-size:11px}.outline-button span{display:none}.intro{display:block;padding:27px 0 22px}.intro h1{font-size:35px;max-width:360px;line-height:1.12}.intro .eyebrow{font-size:8px;letter-spacing:1.3px}.lede{font-size:12px;line-height:1.6}.mission{max-width:none;margin-top:22px;padding-left:13px;gap:4px}.mission-label{font-size:8px}.mission strong{font-size:13px}.mission>span:last-child{font-size:11px}.steps{margin-bottom:25px;grid-template-columns:repeat(5,1fr);border:0;background:transparent;overflow:visible;gap:5px}.step{padding:8px 3px;flex-direction:column;gap:7px;border:1px solid var(--line)!important;border-radius:6px;line-height:1.25;text-align:center;font-size:10px;min-height:86px}.step .number{font-size:10px;width:23px;height:23px}.subtle{display:none}.progress-heading{font-size:9px}#progress-label{font-size:10px}.lesson h2{font-size:28px}.lesson .opening{font-size:14px}.lesson p{font-size:13px}.machine-panel{padding:19px 14px 15px}.bench-heading h2{font-size:15px}.live-tag{font-size:8px;padding:5px}.bench-heading .eyebrow{font-size:8px}.mode-switch{width:100%}.mode-switch button{flex:1;padding:8px 6px}.machine-caption{font-size:8px}.readouts{gap:8px}.readouts span{font-size:7px;letter-spacing:.5px}.readouts strong{font-size:17px}.readouts strong small{font-size:9px}.transport{gap:7px;margin-top:18px}.play-button{font-size:11px;padding:9px 11px}.dark-button{font-size:10px}.speed-label{font-size:9px;gap:4px}.speed-label select{font-size:10px;padding:5px}.controls-panel{padding:17px 15px}.control-title span{display:none}.plot-panel{padding:17px 10px 12px}.plot-heading{padding:0 5px}.plot-heading h3{font-size:12px}.legend{font-size:9px;gap:13px;padding:0 5px}.result-table{font-size:10px}.result-table th{font-size:9px}.result-detail{font-size:10px}footer{flex-direction:column;gap:5px;font-size:9px}.dialog-header{padding:20px 19px}.dialog-content{padding:5px 19px 22px}.dialog-header h2{font-size:23px}.dialog-footer{padding:16px 19px}.matrix .answer{width:72px}.check-actions{gap:14px}#machine{height:200px}.law{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{body{background:white}body>header,body>main,body>dialog,.skip{display:none!important}#print-area{display:block;color:black;font:11pt/1.5 Georgia,serif;padding:0}#print-area h1{font-size:24pt}#print-area h2{font-size:16pt;break-after:avoid}#print-area h3{font-size:12pt;break-after:avoid}#print-area table{width:100%;border-collapse:collapse;font-size:10pt}#print-area td,#print-area th{border-bottom:1px solid #bbb;padding:6px;text-align:left}#print-area .notebook-answer{border-left:2px solid #bbb;padding-left:12px}#print-area .notebook-status{font-size:9pt}#print-area section{break-inside:avoid}@page{margin:.65in}}

/* Exploration controls */
.release-controls{border-top:1px solid #36505a;margin-top:18px;padding-top:16px}.release-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.release-heading h3{font-size:12px;margin:0}.release-heading>span{color:#a9c1c6;font-size:10px}.displacement-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:15px}.displacement-grid label{display:flex;justify-content:space-between;gap:8px;font-size:11px;color:#c1dce7}.displacement-grid>div:nth-child(2) label{color:#e7ba98}.displacement-grid output{font-variant-numeric:tabular-nums;font-weight:600}.displacement-grid input[type=range]{accent-color:#c1dce7;margin-top:8px}.displacement-grid>div:nth-child(2) input{accent-color:#e7ba98}.release-controls .mode-switch{margin-top:8px;width:100%;flex-wrap:wrap}.release-controls .mode-switch button{flex:1;padding:7px 8px;white-space:nowrap}.release-help{font-size:10px;color:#a9c1c6;line-height:1.6;margin:10px 0}.mode-breakdown{font-size:11px;color:#bdd0cc;line-height:1.6}.mode-breakdown summary{cursor:pointer}.mode-breakdown p{margin:8px 0 0}.motor-toggle{display:flex;align-items:center;gap:9px;background:#f1f4ee;border:1px solid #b8cabb;padding:7px 10px;font-size:12px;color:#315342}.switch-track{display:inline-block;width:30px;height:17px;border-radius:20px;background:#9eaaa3;position:relative}.switch-track:after{content:'';position:absolute;left:3px;top:3px;height:11px;width:11px;border-radius:50%;background:white;transition:left .15s}.motor-toggle[aria-checked=true]{background:#e6f0d8;border-color:#538467}.motor-toggle[aria-checked=true] .switch-track{background:#286c52}.motor-toggle[aria-checked=true] .switch-track:after{left:16px}.motor-help{font-size:11px;line-height:1.6;color:var(--muted);margin:-6px 0 15px}.switch-record{font-size:11px;color:var(--muted);line-height:1.6;padding:8px 0 0}.controls-panel #rpm:disabled{opacity:.5;cursor:default}.mode-switch button:focus-visible{outline-color:#d4ec93}.bench{position:static}
@media(max-width:580px){.release-heading{align-items:start;flex-direction:column;gap:5px}.displacement-grid{gap:14px}.displacement-grid label{font-size:10px;flex-direction:column;gap:4px}.release-controls .mode-switch button{font-size:10px}.motor-toggle{font-size:11px}.control-title h3{font-size:12px}.control-title .motor-toggle span{display:inline-block}.release-help{font-size:10px}}

.peak-panel{margin-top:17px;padding:13px 12px;background:#203e46;border:1px solid #35565b;border-radius:7px}.peak-heading{display:flex;justify-content:space-between;gap:10px;align-items:center}.peak-heading strong{font-size:11px;font-weight:500;color:#d4ec93}.peak-heading>span{font-size:9px;color:#adc4c7}.peak-readouts{border-top:0;padding-top:12px}.peak-readouts strong{font-size:18px}.peak-readouts small[id]{color:#a9c1c6;font-size:9px;font-variant-numeric:tabular-nums}.peak-readouts span{letter-spacing:.4px;font-size:8px;min-height:18px;line-height:1.4}.peak-readouts>div{gap:4px}@media(max-width:580px){.peak-panel{padding:12px 8px}.peak-heading{align-items:start;flex-direction:column;gap:5px}.peak-readouts strong{font-size:16px}.peak-readouts span{font-size:7px;min-height:22px}.peak-readouts{grid-template-columns:1fr 1fr 1.2fr}}

#plot{cursor:crosshair}.peak-heading{flex-wrap:wrap}.peak-heading strong{line-height:1.5}

.live-motor-controls{margin-top:18px;padding:15px 16px 13px;background:#203e46;border:1px solid #486862;border-radius:8px}.motor-controls-row{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}.motor-controls-row h3{font-size:13px;margin:0;color:#f1f6f2}.motor-controls-row p{font-size:10px;color:#a9c1c6;margin:4px 0 0}.live-motor-controls .motor-toggle{min-height:37px;font-size:12px;color:#264b37;background:#f1f5e9}.live-motor-controls .motor-toggle[aria-checked=true]{background:#d4ec93;border-color:#d4ec93}.rpm-entry-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:10px 0 3px}.rpm-entry-row>label{font-size:12px;color:#dce9e7}.rpm-entry-row output{display:inline-block;margin-left:8px;font-weight:600;color:#d4ec93;font-variant-numeric:tabular-nums}.rpm-entry-row .rpm-number-label{display:flex;align-items:center;gap:8px;font-size:10px;color:#b3cacc}#rpm-input{width:90px;border:1px solid #6c898c;background:#142e37;color:white;padding:7px;font-size:12px;text-align:center;min-height:34px}.live-motor-controls input[type=range]{accent-color:#d4ec93}.live-motor-controls .presets{margin:5px 0 9px;gap:7px}.live-motor-controls .presets button{background:#17313a;color:#c6d9da;border-color:#587573;font-size:11px;min-height:30px;padding:5px 10px}.live-motor-controls .presets button.selected{background:#d4ec93;border-color:#d4ec93;color:#264b37}.live-motor-controls .motor-help{color:#c0d3d3;margin:5px 0;font-size:11px;line-height:1.5}.live-motor-controls .frequency-note{color:#a9c1c6;font-size:10px;margin:6px 0 0}#drive-controls .advanced{border-top:0;margin-top:4px;padding-top:0}#drive-controls #stiffness-control{padding-top:0;border-top:0;margin-top:0}.live-motor-controls button:focus-visible,.live-motor-controls input:focus-visible{outline-color:#d4ec93}
@media(max-width:580px){.live-motor-controls{padding:13px 11px}.rpm-entry-row{gap:8px}.rpm-entry-row>label{font-size:11px}.rpm-entry-row output{margin-left:4px;font-size:11px}#rpm-input{width:76px}.rpm-entry-row .rpm-number-label{gap:5px;font-size:9px}.live-motor-controls .presets{gap:5px}.live-motor-controls .presets button{font-size:10px;padding:5px 7px}.live-motor-controls .motor-help{font-size:10px}.live-motor-controls .frequency-note{font-size:9px}}

/* Discovery-led lesson */
.experiment-list{padding-left:22px;font-size:14px;line-height:1.8}.experiment-list li{padding-left:5px;margin:10px 0}.callout ul{padding-left:20px;font-size:13px;line-height:1.8}.parameter-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;background:#edf1e9;padding:15px;border-radius:6px;font-size:12px;line-height:1.8;margin:18px 0}.parameter-row strong{font-size:12px}.eigen-entry{display:grid;grid-template-columns:1fr 1fr;gap:20px}.eigen-entry>div{min-width:0}.eigen-entry h4{font-size:12px;margin:8px 0 14px}.eigen-entry .matrix-row{justify-content:flex-start}.eigen-entry .field-label .answer{width:100%}.step.locked{opacity:.58}.locked-note{padding:12px 15px;background:#edf0ea;color:#5a6b60;border-radius:5px}.trial-panel .control-title{margin-bottom:8px;flex-wrap:wrap}.trial-panel .small-note{margin:8px 0}.empty-trials{font-size:12px;line-height:1.7;color:var(--muted)}#trial-table{max-height:270px;overflow:auto}.trial-panel .result-table tr:last-child{background:transparent}.trial-panel .result-table tr:last-child td{font-weight:400}.design-report{border:1px solid var(--line);border-radius:6px;padding:0 15px 12px;margin:15px 0}.lesson h3{font-size:16px;line-height:1.5;margin-top:24px}.lesson .check-block h3{font-size:14px;margin-top:0}.equation .matrix{vertical-align:middle}.trial-panel button:disabled{opacity:.5;cursor:default}.lesson .presets button{font-size:12px;min-height:36px}#navigation-notice{font-size:13px}.trial-panel{min-width:0}#trial-notice:empty{display:none}
@media(max-width:580px){.eigen-entry{gap:14px}.eigen-entry .matrix-row{gap:7px}.eigen-entry .matrix.vector .answer{width:65px}.parameter-row{gap:10px;font-size:11px;padding:12px}.parameter-row strong{font-size:11px}.experiment-list{font-size:13px}.trial-panel .result-table{font-size:10px}.lesson-navigation{gap:8px}.lesson-navigation .primary-button{padding:10px 12px}.equation{overflow-x:auto}}

.mobile-jump{display:none}@media(max-width:850px){.mobile-jump{display:inline-block;color:var(--green);font-size:13px;font-weight:600;margin:6px 0 12px}.bench>.mobile-jump{justify-self:start;margin:0 0 2px}}