/* Systems in Motion — shared token contract. Checked by scripts/check-brand.mjs. */
:root {
  --graphite: #0b1018;
  --cloud: #f5f7fb;
  --electric: #315cfd;
  --ice: #a8c7ff;
  --surface: #f5f7fb;
  --surface-raised: #ffffff;
  --surface-subtle: #edf1f8;
  --text: #101827;
  --text-secondary: #46546c;
  --text-muted: #5d6b82;
  --accent: #315cfd;
  --accent-hover: #2448cf;
  --on-accent: #ffffff;
  --border: #d5deec;
  --border-strong: #a4b2c8;
  --success: #147653;
  --warning: #93610b;
  --danger: #bb3045;
  --display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --body: 'Hanken Grotesk', ui-sans-serif, system-ui, sans-serif;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  /* Compatibility aliases keep existing component props and CV templates stable. */
  --paper: var(--surface);
  --paper-2: var(--surface-subtle);
  --paper-3: var(--surface-raised);
  --ink: var(--text);
  --ink-soft: var(--text-secondary);
  --ink-mute: var(--text-muted);
  --ink-faint: var(--text-muted);
  --signal: var(--accent);
  --signal-deep: var(--accent-hover);
  --ochre: var(--warning);
  --blue-ink: var(--accent);
  --rule: var(--border);
  --rule-strong: var(--border-strong);
  --rule-faint: color-mix(in srgb, var(--border) 45%, transparent);
  color-scheme: light;
  font-family: var(--body);
}
[data-brand-theme="dark"] {
  --surface: #0b1018;
  --surface-raised: #121b29;
  --surface-subtle: #182338;
  --text: #f5f7fb;
  --text-secondary: #b3c0d4;
  --text-muted: #93a4bf;
  --accent: #a8c7ff;
  --accent-hover: #d6e4ff;
  --border: #28354b;
  --border-strong: #4b6080;
  --success: #74dfb1;
  --warning: #f4c56a;
  --danger: #ff95a5;
  --paper: var(--surface);
  --paper-2: var(--surface-subtle);
  --paper-3: var(--surface-raised);
  --ink: var(--text);
  --ink-soft: var(--text-secondary);
  --ink-mute: var(--text-muted);
  --ink-faint: var(--text-muted);
  --signal: var(--accent);
  --signal-deep: var(--accent-hover);
  --ochre: var(--warning);
  --blue-ink: var(--accent);
  --rule: var(--border);
  --rule-strong: var(--border-strong);
  --rule-faint: color-mix(in srgb, var(--border) 45%, transparent);
  color-scheme: dark;
}
/* End shared tokens. */
:root{--muted:var(--text-muted);--line:var(--border);--orange:var(--accent);--lime:var(--ice);--night:var(--graphite);--sans:var(--body)}
/* Guide components use the same tokens as the portfolio; no separate palette. */



*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
button,a{touch-action:manipulation}
button{font:inherit;cursor:pointer;color:inherit}
a{color:inherit;text-underline-offset:4px}
button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--orange);outline-offset:4px}
button:disabled{cursor:default;opacity:.4}
::selection{background:var(--lime);color:var(--ink)}
.shell{max-width:1504px;margin:auto;padding:0 48px}
.topbar{height:88px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{text-decoration:none;display:flex;align-items:center;gap:12px;font-size:14px;font-weight:600}
.monogram{display:grid;place-items:center;width:32px;height:32px;border:1px solid var(--ink);font:bold 20px var(--display);border-radius:50%}
.toplinks{display:flex;gap:28px;align-items:center;font-size:13px}
.toplinks a{text-decoration:none}
.toplinks a:hover{text-decoration:underline}
.edition{font:10px var(--mono);letter-spacing:.08em;color:var(--muted)}
.hero{display:flex;align-items:flex-end;justify-content:space-between;gap:36px;padding:48px 0 40px}
.eyebrow{font:10px var(--mono);letter-spacing:.15em;text-transform:uppercase;display:flex;align-items:center;gap:9px;color:var(--muted)}
.live-dot{width:6px;height:6px;background:var(--orange);border-radius:50%}
h1{font:600 clamp(42px,4.5vw,68px)/1.08 var(--display);letter-spacing:-.065em;margin:17px 0 0}
h1 span{color:var(--orange)}
.hero-copy{max-width:310px;margin:0 0 3px;color:var(--muted);font-size:15px;line-height:1.8}
.hero-copy strong{color:var(--ink);font-weight:500}
.journey{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:26px}
.chapter{position:relative;border:0;border-right:1px solid var(--line);background:transparent;text-align:left;padding:18px 20px;display:flex;gap:15px;align-items:center}
.chapter:first-child{border-left:1px solid var(--line)}
.chapter:hover{background:var(--surface-subtle)}
.chapter[aria-current="step"]{background:var(--surface-subtle)}
.chapter[aria-current="step"]:after{content:'';height:3px;background:var(--ink);position:absolute;bottom:-1px;left:0;right:0}
.step-no{font:11px var(--mono);color:var(--muted)}
.chapter strong{display:block;font-size:13px;font-weight:600}
.chapter small{font:10px var(--mono);color:var(--muted)}
.step-arrow{margin-left:auto;color:var(--muted)}
.workbench{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--surface-raised)}
.sentence-bar{display:flex;align-items:center;gap:22px;padding:20px 26px;border-bottom:1px solid var(--line)}
.sentence-label{font:10px/1.6 var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.tokens{display:flex;gap:7px;flex-wrap:wrap}
.token{border:1px solid var(--line);background:transparent;padding:7px 15px;border-radius:6px;min-height:40px;font-size:15px}
.token:hover{background:#eef0e7}
.token[aria-pressed="true"]{color:#fff;background:var(--ink);border-color:var(--ink)}
.token-index{font:9px var(--mono);margin-left:10px;opacity:.6}
.sentence-hint{margin-left:auto;color:var(--muted);font-size:11px}
.workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(305px,1fr)}
.visual{color:#f5f7fb;background:var(--night);min-width:0;position:relative;display:flex;flex-direction:column}
.visual-head{display:flex;justify-content:space-between;gap:12px;padding:24px 26px 0;align-items:flex-start}
.visual-title{font-size:13px;font-weight:500}
.visual-subtitle{font:10px var(--mono);color:#93a4bf;margin-top:4px}
.view-switch{display:flex;border:1px solid #4b6080;border-radius:6px;padding:3px;gap:2px}
.view-switch button{border:0;background:transparent;color:#b3c0d4;font-size:10px;border-radius:3px;padding:5px 9px;white-space:nowrap}
.view-switch button[aria-pressed="true"]{background:#f5f7fb;color:var(--night)}
.diagram-wrap{display:grid;place-items:center;flex:1;min-height:348px;background-image:radial-gradient(#34496955 .7px,transparent .7px);background-size:18px 18px;margin:14px 0 0}
.diagram{display:block;width:100%;max-height:400px;overflow:visible}
.diagram text{font-family:var(--mono);pointer-events:none}
.matrix-cell{cursor:pointer;outline:none}
.matrix-cell:hover .cell-top,.matrix-cell:focus .cell-top{stroke:#fff;stroke-width:2.5}
.matrix-cell:focus{outline:none}
.matrix-cell[aria-pressed="true"] .cell-top{stroke:#fff;stroke-width:2.5}
.visual-foot{display:flex;justify-content:space-between;gap:16px;font:10px var(--mono);color:#b3c0d4;padding:15px 26px 22px}
.legend{display:flex;gap:14px;align-items:center}
.legend span{display:flex;gap:6px;align-items:center}
.swatch{width:7px;height:7px;border-radius:2px;background:#5a85d0}
.swatch.query{background:#a8c7ff}
.inspector{padding:26px 30px;min-width:0;display:flex;flex-direction:column;border-left:1px solid var(--line)}
.lesson-number{font:10px var(--mono);letter-spacing:.1em;color:var(--orange);text-transform:uppercase}
.inspector h2{font:600 25px/1.25 var(--display);letter-spacing:-.035em;margin:12px 0}
.lesson-copy{color:var(--muted);font-size:13px;line-height:1.75;margin:0 0 20px}
.lesson-copy b{color:var(--ink);font-weight:600}
.vector-label{display:flex;justify-content:space-between;align-items:center;gap:10px;font:10px var(--mono);color:var(--muted);margin:3px 0 9px}
.vector{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}
.component{background:var(--surface-subtle);border:1px solid transparent;border-radius:5px;padding:10px 2px;text-align:center;font:16px var(--mono)}
.component small{display:block;font:9px var(--mono);color:var(--muted);margin-bottom:5px}
.component[aria-pressed="true"]{border-color:var(--orange);background:#1c3054}
.note{font-size:11px;line-height:1.65;color:var(--muted);margin:13px 0 0}
.equation{background:var(--surface-subtle);border:1px solid var(--border);border-radius:7px;padding:15px;margin-top:18px;font:12px/1.9 var(--mono);overflow-wrap:anywhere}
.equation strong{color:var(--orange);font-weight:500}
.eq-label{font:9px var(--mono);color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.bars{display:grid;gap:4px}
.bar{display:grid;grid-template-columns:30px 1fr 48px;gap:10px;align-items:center;font:11px var(--mono);text-align:left;border:1px solid transparent;background:transparent;padding:5px 6px;border-radius:4px}
.bar:hover{background:var(--surface-subtle)}
.bar[aria-pressed="true"]{border-color:var(--border-strong);background:var(--surface-subtle)}
.bar-track{height:7px;background:#28354b;border-radius:2px;overflow:hidden}
.bar-fill{height:100%;background:#315cfd;display:block}
.bar[aria-pressed="true"] .bar-fill{background:var(--orange)}
.bar-value{text-align:right}
.budget{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:10px 0 0;margin-top:10px;font:10px var(--mono)}
.budget strong{font-weight:500}
.step-controls{margin-top:auto;padding-top:20px;display:flex;justify-content:space-between;align-items:center;gap:10px}
.step-controls button{border:1px solid var(--line);background:transparent;border-radius:5px;padding:8px 12px;font-size:11px;min-height:36px}
.step-controls .primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.step-controls .primary:hover{background:#2448cf}
.formula-strip{display:flex;align-items:center;gap:22px;border-top:1px solid var(--line);padding:17px 26px;font:11px var(--mono);overflow:auto}
.formula-strip .label{color:var(--muted);font:9px var(--mono);white-space:nowrap;letter-spacing:.07em}
.formula-strip code{white-space:nowrap}
.formula-strip .shape{margin-left:auto;white-space:nowrap;color:var(--muted);font-size:10px}
.below{display:grid;grid-template-columns:1fr 1fr;gap:50px;margin:32px 0 44px}
.below h3{font-size:13px;font-weight:600;margin:0 0 10px}
.below p{font-size:12px;color:var(--muted);line-height:1.85;margin:0;max-width:560px}
.scope{display:flex;gap:15px}
.scope-icon{flex:0 0 26px;height:26px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;font:12px var(--mono)}
details{border-top:1px solid var(--line);padding:13px 0}
summary{cursor:pointer;font-size:12px;font-weight:500}
details p{margin-top:10px!important}
pre{font:11px/1.9 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere;background:var(--surface-subtle);border-radius:6px;padding:16px}
footer{border-top:1px solid var(--line);padding:20px 0 30px;display:flex;justify-content:space-between;color:var(--muted);font-size:11px;gap:15px}
.footer-links{display:flex;gap:22px}
.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}
.skip{position:absolute;top:-60px;left:20px;padding:10px;background:var(--paper);z-index:5}
.skip:focus{top:12px}
noscript{display:block;padding:30px;border:1px solid var(--orange)}
.step-math{border:1px solid var(--line);border-radius:4px;background:transparent;font-size:10px;padding:6px 10px;margin-top:10px;min-height:32px}

@media(min-width:1450px){.diagram-wrap{min-height:395px}
.inspector{padding:30px 36px}
.inspector h2{font-size:29px}
.lesson-copy{font-size:14px}
.hero-copy{max-width:350px}
}

@media(max-width:1050px){.shell{padding:0 28px}
.workspace{grid-template-columns:minmax(0,1.2fr) minmax(285px,1fr)}
.inspector{padding:24px}
.sentence-hint{display:none}
.chapter{padding:16px 14px;gap:10px}
.hero{padding-top:36px}
.hero-copy{max-width:270px;font-size:13px}
.step-arrow{display:none}
.visual-head{padding:22px 20px 0}
.visual-foot{padding:15px 20px 20px;font-size:9px}
.diagram-wrap{min-height:340px}
}

@media(max-width:760px){.shell{padding:0 20px}
.topbar{height:70px}
.edition{display:none}
.toplinks{gap:16px;font-size:11px}
.hero{display:block;padding:30px 0}
.hero-copy{max-width:420px;margin-top:19px;font-size:13px}
h1{font-size:48px}
.journey{margin-bottom:20px}
.chapter{padding:12px 8px;display:block}
.step-no{font-size:9px}
.chapter strong{font-size:11px;margin-top:4px}
.chapter small{display:none}
.sentence-bar{padding:16px;gap:12px;align-items:flex-start;flex-direction:column}
.sentence-label br{display:none}
.sentence-label{font-size:9px}
.tokens{gap:5px;width:100%}
.token{padding:6px 10px;flex:1;font-size:13px}
.token-index{margin-left:5px;font-size:8px}
.workspace{grid-template-columns:1fr}
.inspector{border-left:0;border-top:1px solid var(--line);padding:25px}
.diagram-wrap{min-height:0}
.diagram{max-height:370px}
.visual-head{padding:20px 20px 0}
.visual-foot{padding-bottom:18px}
.inspector h2{font-size:25px}
.lesson-copy{font-size:14px}
.formula-strip{padding:16px 20px;gap:14px}
.formula-strip .shape{display:none}
.below{grid-template-columns:1fr;gap:26px;margin:28px 0}
.step-controls{padding-top:22px}
.step-controls button{padding:10px 14px;font-size:12px}
.component{padding:12px 5px}
footer{flex-wrap:wrap}
.legend{gap:10px}
.hero .eyebrow{font-size:9px}
}

@media(max-width:380px){.shell{padding:0 12px}
h1{font-size:42px}
.token{padding:6px 7px}
.token-index{display:none}
.visual-foot{flex-wrap:wrap}
.toplinks a:first-child{display:none}
}

@media(max-width:760px){.tokens{display:grid;grid-template-columns:repeat(6,minmax(0,1fr))}
.token{padding:6px 3px}
.token-index{margin-left:3px}
.visual-foot{flex-wrap:wrap}
.visual-head{gap:10px}
.visual-title{max-width:190px}
.topbar{gap:14px}
.brand{font-size:12px;gap:7px}
.toplinks{gap:12px}
.toplinks a:first-child{display:none}
}

@media(prefers-reduced-motion:no-preference){.bar-fill{transition:width .2s ease}
.component,.token,.chapter{transition:background .15s ease}
}

[hidden]{display:none!important}
.monogram{border-radius:7px;color:var(--ice);border-color:var(--border-strong);font-size:13px;background:var(--surface-subtle)}
h1{font-weight:600;letter-spacing:-.055em}
.hero{padding:38px 0 34px}
.hero-copy{max-width:340px}
.journey{display:flex;overflow-x:auto;overflow-y:hidden;margin-bottom:14px;scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}
.chapter{flex:1;min-width:86px;padding:14px 10px;display:block}
.chapter strong{font-size:11px;margin-top:5px;white-space:nowrap}
.chapter[aria-current="step"]:after{background:var(--electric)}
.step-picker{display:flex;gap:14px;align-items:center;margin:0 0 22px;font:11px var(--mono);color:var(--muted)}
.step-picker select,select{font:12px var(--sans);color:var(--ink);background:var(--surface-raised);border:1px solid var(--line);border-radius:6px;padding:8px 12px;max-width:100%}
.step-picker span{margin-left:auto;font-size:10px}
.workspace{grid-template-columns:minmax(0,1.45fr) minmax(340px,1fr);align-items:start}
.visual{position:sticky;top:14px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--night)}
.visual-title{max-width:none}
.visual-subtitle{line-height:1.7;max-width:310px}
.visual-head{gap:20px}
.inspector{border:0;min-height:550px}
.scene-host{width:100%;height:420px;position:relative;overflow:hidden;touch-action:none}
.scene-host canvas{width:100%;height:100%;display:block;touch-action:none}
.scene-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.scene-label{position:absolute;left:0;top:0;font:10px/1.45 var(--mono);color:#e0eaff;white-space:nowrap;text-shadow:0 1px 3px #000;pointer-events:none;padding:1px 3px;border-radius:3px;background:#0b1018b8}
.scene-label.selected-label{color:#a8c7ff;background:#182338e6;font-weight:500}
.scene-label.matrix-name{font:11px var(--mono);color:#f5f7fb;background:#0b1018e0;border:1px solid #28354b;padding:5px 8px}
.camera-controls,.calculation-controls{display:flex;gap:6px;flex-wrap:wrap;padding:12px 22px 0;align-items:center}
.camera-controls button,.calculation-controls button,.inline-controls button{background:var(--surface-subtle);border:1px solid var(--border-strong);color:var(--ink);border-radius:5px;padding:7px 11px;min-height:34px;font-size:11px}
.camera-controls button:hover,.calculation-controls button:hover{border-color:var(--ice)}
.calculation-controls{border-top:1px solid var(--line);padding:14px 22px;margin-top:3px}
.calculation-controls span{font:10px var(--mono);color:var(--muted)}
.scene-status{font:10px/1.6 var(--mono);padding:8px 22px 0;color:var(--muted);margin:0}
.visual-foot{padding:15px 22px;flex-wrap:wrap;font-size:9px}
.legend{flex-wrap:wrap;gap:12px}
.swatch{background:#5a85d0}.swatch.query{background:#a8c7ff}.swatch.computed{background:#74dfb1}.swatch.parameter{background:#afa9ea}
.token[aria-pressed="true"],.step-controls .primary{background:var(--electric);border-color:var(--electric);color:#fff}
.step-controls .primary:hover{background:var(--accent-hover);color:var(--graphite)}
.component{font-size:14px;color:var(--ink)}
.component[aria-pressed="true"]{border-color:var(--electric)}
.flat-matrices{padding:22px;max-height:620px;overflow:auto}
.flat-matrix{overflow:auto;margin-bottom:22px}
.flat-matrix table{width:100%;border-collapse:separate;border-spacing:4px;font:11px var(--mono)}
.flat-matrix caption{text-align:left;color:var(--ice);font:12px var(--mono);padding:0 0 12px}
.flat-matrix th{color:var(--muted);font-weight:400;white-space:nowrap}
.flat-matrix td button{font:11px var(--mono);padding:8px 5px;width:100%;min-height:34px;background:#182c4a;border:1px solid #304768;border-radius:4px;color:#e0eaff}
.flat-matrix td button[aria-pressed="true"]{background:var(--ice);border-color:var(--ice);color:var(--graphite)}
.flat-matrix td button:disabled{opacity:1}
.token-readout{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.token-readout>div{display:flex;flex-direction:column;background:var(--surface-subtle);padding:12px;border:1px solid var(--line);border-radius:7px}
.token-readout span{font-size:14px}.token-readout code{font:12px var(--mono);color:var(--ice)}
.inline-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:15px 0}
.inline-controls button[aria-pressed="true"]{background:var(--electric);border-color:var(--electric);color:#fff}
.inline-controls label{font-size:12px}
.parameter-control{display:block;margin:16px 0 8px;font:11px var(--mono);color:var(--muted)}
.parameter-control output{color:var(--ice)}
.parameter-control input{display:block;width:100%;margin:14px 0;accent-color:var(--electric)}
.code-drawer{padding:18px 26px;border-top:1px solid var(--line);background:var(--surface-subtle)}
.code-drawer summary{color:var(--ice)}
.code-drawer p{font-size:12px;color:var(--muted)}
.code-drawer pre{margin-bottom:0;background:var(--graphite);color:var(--ink);font-size:12px}
.chapter-entry{display:inline-block;margin-top:15px;color:var(--ice);font-weight:600}
.chapter-groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-bottom:14px}
.chapter-groups button{padding:16px 18px;text-align:left;border:1px solid var(--border);border-radius:8px;background:var(--surface-raised);color:var(--ink);font:500 14px var(--display)}
.chapter-groups button small{display:block;margin-top:6px;color:var(--muted);font:10px var(--mono)}
.chapter-groups button[aria-current]{border-color:var(--ice);background:var(--surface-subtle)}
.operation-rail{list-style:none;margin:20px 0;padding:0;display:grid;gap:5px}
.operation-rail button{display:flex;align-items:center;gap:10px;text-align:left;width:100%;padding:9px 10px;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--muted);font:12px/1.5 var(--body)}
.operation-rail button span{display:grid;place-items:center;width:23px;height:23px;flex-shrink:0;border:1px solid var(--border-strong);border-radius:50%;font:10px var(--mono)}
.operation-rail button[aria-current]{background:var(--surface-subtle);border-color:var(--border-strong);color:var(--ice)}
.operation-rail button[aria-current] span{background:var(--electric);border-color:var(--electric);color:#fff}
.operation-copy h3{font:500 19px/1.4 var(--display);margin:24px 0 12px}
.cell-inspector{margin:0;padding:12px 22px;border-top:1px solid var(--border);font:11px/1.7 var(--mono);color:var(--ice);overflow-wrap:anywhere}
.table-scroll{max-width:100%;overflow:auto;margin:14px 0}
.table-scroll table{width:100%;border-collapse:collapse;font:11px/1.6 var(--mono);text-align:left}
.table-scroll caption{font:12px var(--body);text-align:left;color:var(--muted);padding:8px 0 12px}
.table-scroll td,.table-scroll th{padding:9px 7px;border-bottom:1px solid var(--border);font-weight:400}
.table-scroll thead th{color:var(--muted)}
.winner{background:var(--surface-subtle);color:var(--ice)}
.activation-chart{display:block;width:100%;max-height:240px;background:var(--surface-subtle);border-radius:8px}
.activation-chart path{fill:none;stroke-width:2}.chart-axis{stroke:var(--border-strong)}
.relu-curve{stroke:var(--warning);stroke-dasharray:5 4}.gelu-curve{stroke:var(--ice)}
.activation-chart text{font:11px var(--mono);fill:var(--warning)}.activation-chart .gelu-label{fill:var(--ice)}
.untrained{color:var(--warning);font:10px/1.6 var(--mono);letter-spacing:.06em;margin:15px 0}
.vocabulary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}
.vocabulary button{background:var(--surface-subtle);border:1px solid var(--border-strong);border-radius:6px;min-height:48px;color:var(--ink);padding:8px;font:13px var(--mono)}
.vocabulary small{display:block;margin-top:3px;color:var(--muted);font-size:9px}
.sequence{padding:12px 15px;background:var(--surface-subtle);border:1px solid var(--border);border-radius:6px;overflow-wrap:anywhere}
.sequence p{margin:6px 0;font:14px/1.8 var(--mono)}.sequence mark{background:transparent;color:var(--success)}
.inline-controls button:disabled,.vocabulary button:disabled{opacity:.45;cursor:default}
#model-parameters,#complete-model-code{max-height:450px;overflow:auto}
.tokens{flex-wrap:wrap}.visual,.inspector,.workspace{min-width:0}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--ice);outline-offset:3px}
@media(max-width:760px){.chapter-groups{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.chapter-groups button{padding:12px 9px;font-size:11px;line-height:1.6}.chapter-groups button small{font-size:9px}.tokens{display:flex}.token{flex:0 1 auto;min-width:36px}.cell-inspector{padding:12px 18px}.operation-rail button{min-height:44px}.table-scroll table{font-size:10px}}
.formula-strip .shape{display:none}
.mascot-guide{display:flex;align-items:center;gap:20px;margin:0 0 25px;padding:16px 24px 0;background:linear-gradient(115deg,var(--surface-subtle),var(--surface));border:1px solid var(--line);border-radius:12px;overflow:hidden}
.mascot-guide img{width:86px;height:132px;object-fit:contain;object-position:bottom;align-self:flex-end}
.mascot-guide div{padding-bottom:16px}.mascot-guide strong{font:12px var(--display);color:var(--ice)}
.mascot-guide p{font-size:13px;line-height:1.6;margin:5px 0 0;color:var(--text-secondary)}
@media(max-width:1050px){.shell{padding:0 25px}.workspace{grid-template-columns:minmax(0,1.2fr) minmax(315px,1fr)}.step-picker span{display:none}.scene-host{height:390px}.inspector{padding:23px}.visual-head{padding:20px 20px 0}}
@media(max-width:760px){.shell{padding:0 16px}.hero{padding:28px 0}.hero-copy{font-size:14px}.journey{display:none}.step-picker{display:block}.step-picker label{display:block;margin-bottom:7px}.step-picker select{width:100%;font-size:14px;min-height:44px}.workspace{grid-template-columns:1fr}.visual{position:static;border-right:0}.scene-host{height:330px}.inspector{padding:22px;min-height:0}.visual-head{padding:20px 18px 0}.visual-subtitle{max-width:235px;font-size:9px}.flat-matrices{padding:12px;max-height:550px}.flat-matrix table{border-spacing:2px;font-size:10px}.flat-matrix td button{padding:8px 4px;font-size:10px}.mascot-guide{padding:12px 16px 0;gap:12px}.mascot-guide img{width:66px;height:106px}.mascot-guide p{font-size:12px}.code-drawer{padding:16px}.code-drawer pre{font-size:11px}.scene-label{font-size:9px}.visual-foot{padding:14px 18px}.camera-controls,.calculation-controls{padding-left:18px;padding-right:18px}.step-controls{padding-top:25px}.parameter-control input{min-height:28px}}