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p{line-height:1.8}.selection-label{color:var(--color-accent);margin-right:var(--space-2);font-weight:500}.hero-visual-note{margin-top:var(--space-4);color:var(--color-text-secondary);font-size:var(--type-caption);line-height:1.9}.hero-visual-note .mono{color:var(--color-text-primary);margin-right:var(--space-3);font-size:.75rem}.home-journey{border-top:1px solid var(--color-border);padding-block:var(--space-7) var(--space-8)}.journey-heading{justify-content:space-between;align-items:end;gap:var(--space-5);display:flex}.journey-heading h2{margin-top:var(--space-3);font-size:1.5rem}.journey-steps{gap:var(--space-6);margin-top:var(--space-7);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.journey-step{padding-right:var(--space-6);border-right:1px solid var(--color-border)}.journey-step:last-child{border-right:0}.journey-step-top{margin-bottom:var(--space-5);justify-content:space-between;align-items:center;display:flex}.journey-step-top .mono{color:var(--color-text-secondary);font-size:var(--type-caption)}.journey-step p{margin-top:var(--space-2);font-size:var(--type-body-small);color:var(--color-text-secondary)}.learn-page{padding-block:var(--space-8)}.learn-heading{justify-content:space-between;align-items:end;gap:var(--space-7);display:flex}.learn-heading h1{margin-top:var(--space-4);font-size:var(--type-h1);letter-spacing:-.03em;line-height:1.3}.page-intro{margin-top:var(--space-5);color:var(--color-text-secondary)}.map-progress{flex:0 0 26%;min-width:235px;max-width:300px}.progress-label{justify-content:space-between;gap:var(--space-4);margin-bottom:var(--space-3);font-size:var(--type-body-small);display:flex}.progress-track{background:var(--color-border);border-radius:3px;height:5px;overflow:hidden}.progress-track>span{background:var(--color-accent);border-radius:inherit;height:100%;transition:width .22s;display:block}.map-progress>p{margin-top:var(--space-3);font-size:var(--type-caption);color:var(--color-text-secondary)}.map-progress>p>span{display:block}.learning-toolbar{justify-content:space-between;align-items:center;gap:var(--space-5);padding-block:var(--space-6);border-bottom:1px solid var(--color-border);margin-top:var(--space-6);display:flex}.mode-options{gap:var(--space-2);flex-wrap:wrap;display:flex}.mode-option{align-items:center;gap:var(--space-2);min-height:43px;padding:var(--space-2) var(--space-3);font-size:var(--type-body-small);border-radius:var(--radius-sm);color:var(--color-text-secondary);background:0 0;border:1px solid #0000;display:inline-flex}.mode-option.is-active{background:var(--color-surface);border-color:var(--color-border);color:var(--color-text-primary);box-shadow:0 2px 3px #20293804}.coming-label{background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:4px;padding:1px 5px;font-size:.75rem}.mode-description{font-size:var(--type-caption);color:var(--color-text-secondary)}.map-start-banner{justify-content:space-between;align-items:center;gap:var(--space-6);padding:var(--space-5) var(--space-6);margin-top:var(--space-6);background:var(--color-accent-soft);border-radius:var(--radius-md);border:1px solid #d7def9;display:flex}.map-start-label{color:var(--color-accent);font-size:var(--type-body-small);font-weight:600}.map-start-banner p{margin-top:var(--space-1);font-size:var(--type-body-small);color:var(--color-text-secondary)}.learning-map{margin-top:var(--space-7)}.map-stage{padding:0 0 var(--space-7) 64px;position:relative}.map-stage:before{content:"";background:var(--color-border);width:1px;position:absolute;top:38px;bottom:0;left:18px}.map-stage:last-child:before{bottom:var(--space-7)}.stage-heading{align-items:center;gap:var(--space-5);margin-bottom:var(--space-5);display:flex}.stage-marker{border:1px solid var(--color-border);background:var(--color-background);width:37px;height:37px;color:var(--color-text-secondary);font-size:var(--type-caption);border-radius:50%;place-items:center;display:grid;position:absolute;top:0;left:0}.map-stage:first-child .stage-marker{color:var(--color-accent);border-color:var(--color-accent);background:var(--color-accent-soft)}.stage-heading h2{font-size:1.1875rem;font-weight:600}.stage-heading p{font-size:var(--type-body-small);color:var(--color-text-secondary);margin-top:var(--space-1)}.stage-lessons{gap:var(--space-4);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.four-lessons{grid-template-columns:repeat(4,minmax(0,1fr))}.lesson-card{min-width:0;padding:var(--space-5);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);display:block;position:relative}a.lesson-card{transition:border-color .16s,box-shadow .16s}a.lesson-card:hover{border-color:var(--color-accent);box-shadow:0 6px 22px #3659df0d}.status-card-available,.status-card-unlocked,.status-card-in-progress{border-color:#aabafa;box-shadow:0 2px 6px #3659df06}.status-card-completed{border-color:#a8cdb8}.lesson-card-top{color:var(--color-text-secondary);margin-bottom:var(--space-5);justify-content:space-between;align-items:center;display:flex}.status-card-available .lesson-card-top,.status-card-unlocked .lesson-card-top,.status-card-in-progress .lesson-card-top{color:var(--color-accent)}.lesson-number{font-size:var(--type-body-small)}.lesson-card h3{overflow-wrap:anywhere;font-size:1.0625rem}.lesson-card-subtitle{margin-top:var(--space-2);color:var(--color-text-secondary);font-size:var(--type-body-small);min-height:3.2em;line-height:1.6}.is-locked{background:0 0}.is-locked h3{color:var(--color-text-secondary)}.lesson-status{align-items:center;gap:var(--space-1);font-size:var(--type-caption);color:var(--color-text-secondary);margin-top:var(--space-5);flex-wrap:wrap;display:flex}.status-available,.status-unlocked,.status-in-progress{color:var(--color-accent)}.status-completed{color:var(--color-success)}.lesson-duration{color:var(--color-text-secondary);margin-left:auto}.map-endnote{text-align:center;color:var(--color-text-secondary);font-size:var(--type-body-small)}.lesson-page{padding-block:var(--space-6) var(--space-8)}.lesson-breadcrumb{align-items:center;gap:var(--space-3);color:var(--color-text-secondary);font-size:var(--type-body-small);display:flex}.lesson-breadcrumb a{align-items:center;gap:var(--space-2);min-height:36px;display:inline-flex}.lesson-breadcrumb a:hover{color:var(--color-accent)}.lesson-heading{justify-content:space-between;gap:var(--space-5);margin-top:var(--space-6);align-items:end;display:flex}.lesson-heading h1{font-size:var(--type-h1);margin-top:var(--space-3);letter-spacing:-.025em}.lesson-heading p:last-child{color:var(--color-text-secondary);margin-top:var(--space-3)}.reading-time,.completed-badge{align-items:center;gap:var(--space-2);color:var(--color-text-secondary);font-size:var(--type-body-small);white-space:nowrap;display:inline-flex}.completed-badge{color:var(--color-success);margin-left:var(--space-3)}.learning-goal{gap:var(--space-4);padding:var(--space-5);border:1px solid var(--color-border);background:var(--color-surface);border-radius:var(--radius-md);margin-block:var(--space-6);display:flex}.learning-goal>svg{color:var(--color-accent);margin-top:3px}.learning-goal span{font-size:var(--type-body-small);font-weight:600}.learning-goal p{font-size:var(--type-body-small);margin-top:var(--space-1);color:var(--color-text-secondary)}.lesson-workspace{gap:var(--space-7);grid-template-columns:1.05fr 1fr;align-items:start;display:grid}.lesson-visual-column{min-width:0}.lesson-workspace .scene-frame{height:330px}.lesson-visual-note{font-size:var(--type-caption);color:var(--color-text-secondary);margin:var(--space-4) var(--space-2) 0}.explanation-panel{min-width:0;padding-block:var(--space-2)}.section-label{align-items:center;gap:var(--space-2);color:var(--color-text-secondary);font-size:var(--type-body-small);margin-bottom:var(--space-4);display:flex}.explanation-panel h2{font-size:1.5rem;line-height:1.5}.explanation-panel>p{color:var(--color-text-secondary);margin-top:var(--space-4);font-size:var(--type-body);line-height:1.95}.analogy{gap:var(--space-3);padding:var(--space-4);background:var(--color-surface-elevated);border-radius:var(--radius-sm);margin-top:var(--space-5);display:flex}.analogy>svg{color:var(--color-warning);margin-top:3px}.analogy h3{font-size:var(--type-body-small)}.analogy p{font-size:var(--type-body-small);color:var(--color-text-secondary);margin-top:var(--space-2)}.technical-explanation{margin-top:var(--space-5);border-block:1px solid var(--color-border)}.technical-explanation summary{align-items:center;gap:var(--space-3);padding-block:var(--space-4);cursor:pointer;font-size:var(--type-body-small);list-style:none;display:flex}.technical-explanation summary::-webkit-details-marker{display:none}.details-plus{margin-left:auto;font-size:1.25rem}.technical-explanation[open] .details-plus{transform:rotate(45deg)}.technical-explanation>div{padding-bottom:var(--space-4);color:var(--color-text-secondary);font-size:var(--type-body-small)}.related-concepts{align-items:baseline;gap:var(--space-3);margin-top:var(--space-5);font-size:var(--type-caption);color:var(--color-text-secondary);display:flex}.related-concepts>span{white-space:nowrap}.related-concepts>div{gap:var(--space-2);flex-wrap:wrap;display:flex}.concept-tag{padding:var(--space-1) var(--space-2);border:1px solid var(--color-border);background:var(--color-surface);border-radius:5px}.misconceptions{margin-top:var(--space-8)}.subsection-heading h2{margin-top:var(--space-3)}.misconception-grid{gap:var(--space-4);margin-top:var(--space-5);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.misconception-card{padding:var(--space-5);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md)}.misconception-card p{gap:var(--space-2);font-size:var(--type-body-small);color:var(--color-text-secondary);display:flex}.misconception-card p svg{color:var(--color-success);margin-top:4px}.misconception-card .misconception-wrong{color:var(--color-text-primary);margin-bottom:var(--space-4)}.misconception-card .misconception-wrong svg{color:var(--color-danger)}.lesson-completion{margin-top:var(--space-7);justify-content:space-between;align-items:center;gap:var(--space-6);background:var(--color-accent-soft);padding:var(--space-6);border-radius:var(--radius-md);border:1px solid #d7def9;display:flex}.completion-copy{gap:var(--space-4);align-items:center;display:flex}.completion-copy>svg{color:var(--color-accent)}.completion-copy h2{font-size:var(--type-h3)}.completion-copy p{font-size:var(--type-body-small);color:var(--color-text-secondary);margin-top:var(--space-2)}.lesson-completion.is-completed{background:var(--color-surface);border-color:#b6d6c2}.is-completed .completion-copy>svg{color:var(--color-success)}.lesson-bottom{justify-content:space-between;align-items:center;gap:var(--space-6);margin-top:var(--space-6);display:flex}.lesson-pagination{justify-content:space-between;align-items:center;gap:var(--space-6);flex:1;display:flex}.next-lesson-locked{align-items:center;gap:var(--space-2);font-size:var(--type-body-small);color:var(--color-text-secondary);display:flex}.next-lesson-locked>span{background:var(--color-surface-elevated);border-radius:5px;padding:3px 6px;font-size:.75rem}.progress-indicator.is-compact{border-left:1px solid var(--color-border);width:180px;padding-left:var(--space-6)}.empty-page{gap:var(--space-5);flex-direction:column;align-items:flex-start;min-height:65vh;padding-block:110px 150px;display:flex}.empty-page h1{font-size:var(--type-h1)}.empty-page>p:not(.eyebrow){color:var(--color-text-secondary)}.visualization-placeholder{min-height:330px;color:var(--color-text-secondary);border:1px solid var(--color-border);border-radius:var(--radius-lg);place-items:center;display:grid}@media(min-width:1600px){.home-hero{padding-block:100px 90px}.scene-frame{height:395px}}@media(max-width:1150px){.page-width{width:calc(100% - 80px)}.brand-caption,.brand-divider{display:none}.home-hero{gap:var(--space-6)}.four-lessons{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-workspace{gap:var(--space-6)}.node-controls{gap:var(--space-1);padding-inline:var(--space-2)}.node-control-wrap{gap:var(--space-1)}.node-control{padding-inline:var(--space-2);gap:var(--space-1)}.node-arrow{width:10px}.mode-description{display:none}.lesson-bottom{flex-wrap:wrap}}@media(max-width:850px){.page-width{width:calc(100% - 48px)}.header-inner{height:76px}.home-hero{padding-block:var(--space-8) var(--space-7);grid-template-columns:1fr}.hero-copy h1{font-size:clamp(3rem,7vw,4rem)}.hero-copy h1 br:first-child{display:none}.hero-visual{padding-top:var(--space-4)}.scene-frame{height:360px}.hero-visual-note{text-align:center}.journey-steps{gap:var(--space-5)}.journey-step{padding-right:var(--space-5)}.learn-heading{align-items:start;gap:var(--space-6);flex-direction:column}.map-progress{width:100%;max-width:none}.map-progress>p{justify-content:space-between;gap:var(--space-3);display:flex}.map-start-banner{padding:var(--space-5)}.map-stage{padding-left:54px}.stage-lessons{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-workspace{gap:var(--space-7);grid-template-columns:1fr}.lesson-workspace .scene-frame{height:350px}.misconception-grid{grid-template-columns:1fr}.misconception-card .misconception-wrong{margin-bottom:var(--space-2)}.footer-note{display:none}}@media(max-width:560px){.page-width{width:calc(100% - 40px)}.header-inner{height:auto;padding-top:var(--space-4);gap:var(--space-4);flex-wrap:wrap}.brand{font-size:1.1875rem}.brand-mark{border-radius:9px;width:34px;height:34px}.header-cta{font-size:var(--type-caption);margin-left:auto}.main-nav{justify-content:center;gap:var(--space-7);order:3;width:100%;height:42px}.main-nav a{padding-inline:var(--space-2)}.home-hero{padding-block:var(--space-7);gap:var(--space-5)}.hero-eyebrow{margin-bottom:var(--space-5);font-size:.75rem}.hero-copy h1{font-size:clamp(2.5rem,9.3vw,3.2rem);line-height:1.32}.hero-copy h1 br:first-child{display:initial}.hero-description{margin-top:var(--space-5)}.hero-footnote{font-size:.75rem}.hero-button{margin-top:var(--space-5)}.scene-frame{height:280px}.visualization-topline{padding:var(--space-4) var(--space-4) 0}.visualization-caption{font-size:.75rem}.node-control{padding-inline:9px}.node-control>svg{display:none}.node-arrow{width:11px}.visualization-description{padding-inline:var(--space-4);min-height:97px}.hero-visual-note{text-align:left;font-size:.75rem}.journey-heading{align-items:flex-start;gap:var(--space-4);flex-direction:column}.journey-heading h2{font-size:1.375rem}.journey-steps{margin-top:var(--space-4);grid-template-columns:1fr;gap:0}.journey-step{border-right:0;border-bottom:1px solid var(--color-border);padding:var(--space-5) 0}.journey-step:last-child{border-bottom:0}.journey-step-top{margin-bottom:var(--space-3)}.home-journey{padding-block:var(--space-6)}.footer-brand{gap:var(--space-2);flex-direction:column}.site-footer{padding-block:var(--space-5)}.learn-page{padding-block:var(--space-7)}.learn-heading h1{font-size:2rem}.map-progress>p{flex-direction:column;gap:0}.learning-toolbar{margin-top:var(--space-4);padding-block:var(--space-5)}.mode-options{gap:var(--space-2)}.mode-option{padding:var(--space-2);gap:6px}.mode-option>svg{width:15px}.coming-label{font-size:.75rem}.map-start-banner{align-items:flex-start;gap:var(--space-4);flex-direction:column}.map-stage{padding-left:39px;padding-bottom:var(--space-6)}.stage-marker{width:28px;height:28px;font-size:.75rem;top:1px}.map-stage:before{top:34px;left:13px}.stage-lessons{gap:var(--space-3);grid-template-columns:1fr}.lesson-card{padding:var(--space-4)}.lesson-card-top{margin-bottom:var(--space-3)}.lesson-card-subtitle{min-height:0}.lesson-status{margin-top:var(--space-4)}.lesson-heading{align-items:flex-start;gap:var(--space-4);flex-direction:column}.lesson-heading h1{font-size:2.125rem}.lesson-breadcrumb{gap:var(--space-2);font-size:var(--type-caption);flex-wrap:wrap}.learning-goal{padding:var(--space-4);gap:var(--space-3)}.lesson-workspace .scene-frame{height:280px}.misconceptions{margin-top:var(--space-7)}.lesson-completion{padding:var(--space-5);align-items:stretch;gap:var(--space-5);flex-direction:column}.completion-copy{align-items:flex-start}.completion-copy>svg{margin-top:2px}.lesson-bottom{align-items:stretch;gap:var(--space-5);flex-direction:column}.lesson-pagination{align-items:flex-start;gap:var(--space-5);flex-direction:column}.progress-indicator.is-compact{border-left:0;width:100%;padding-left:0}}@media(prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}:root{--field-canvas: #e8e5dc;--field-ink: #262623;--field-paper: #f5f2ea;--field-signal: #c8432e;--field-line: #c9c5bb;--field-muted: #68675f;--color-background: #e8e5dc;--color-surface: #f5f2ea;--color-surface-elevated: #dfdcd2;--color-text-primary: #262623;--color-text-secondary: #68675f;--color-border: #c9c5bb;--color-accent: #b23826;--color-accent-hover: #922e21;--color-accent-soft: #f0e0d8;--radius-sm: 2px;--radius-md: 3px;--radius-lg: 4px;--type-display: clamp(2.7rem, 4.9vw, 5rem);--type-h1: clamp(2rem, 3.8vw, 3.8rem)}body{background:var(--color-background)}::selection{background:var(--field-signal);color:var(--field-ink)}:focus-visible{outline:3px solid #b23826;outline-offset:4px}body .page-width{width:min(1376px,calc(100% - 96px))}body .eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:.13em}body h1,body h2,body h3{font-weight:750}body .heading-soft{color:var(--field-muted)}body .site-header{background:var(--field-ink);border-bottom:4px solid var(--field-signal)}body .header-inner{height:86px;gap:28px}body .brand{color:var(--field-paper);font-size:21px;letter-spacing:-.04em}body .brand strong{font-weight:800}body .brand-mark{background:var(--field-signal);color:#fff8f0;border-radius:0;width:40px;height:40px}body .brand-caption{color:#c8c4ba;font-size:10px;letter-spacing:.06em}body .brand-divider{background:#55544d;margin-inline:14px}body .main-nav{gap:6px}body .main-nav a{color:#d2cec4;padding:18px 15px;font-size:13px;gap:8px;border-inline:1px solid transparent}body .main-nav a:hover{background:#393831;color:#fff}body .main-nav a.active{color:#fff8f0;background:#393831;border-inline-color:#55534b}body .main-nav a.active:after{width:100%;left:0;height:3px;background:var(--field-signal)}.nav-index{color:#bcb8af;font:10px var(--font-mono);align-self:flex-start}body .main-nav a.active .nav-index{color:#f2a08f}body .header-cta{background:var(--field-signal);border:1px solid var(--field-signal);color:#fff8f0;border-radius:0;font-weight:700;padding:12px 16px}body .header-cta:hover{background:#b23826;border-color:#b23826}body .site-header :focus-visible{outline-color:#fff8f0}body .button-primary{background:var(--field-signal);color:#fff8f0;border-color:var(--field-signal);box-shadow:none;border-radius:0}body .button-primary:hover{background:#af3725;transform:none}body .site-footer{margin-top:20px;border-top:2px solid var(--field-ink);min-height:104px}body .footer-brand{font-weight:800;letter-spacing:-.03em}body .footer-brand span{letter-spacing:0}body .footer-note{font:11px var(--font-mono)}.field-masthead{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-block:22px;border-bottom:1px solid var(--field-line);font:10px var(--font-mono);letter-spacing:.09em;color:var(--field-muted)}.field-masthead-status{display:flex;align-items:center;gap:8px}.field-masthead-status i{width:6px;height:6px;background:#c8432e}body .home-hero{grid-template-columns:1fr 1.12fr;gap:56px;padding-block:58px 52px}body .hero-eyebrow{color:var(--field-ink);margin-bottom:28px;font-size:11px}body .short-line{width:26px;height:7px;background:var(--field-ink)}body .hero-copy h1{font-weight:850;letter-spacing:-.055em;line-height:1.16}.field-title-prelude{display:block;font-size:clamp(19px,1.7vw,25px);letter-spacing:.02em;font-weight:500;margin-bottom:20px}.field-title-main{display:block}body .hero-heading-soft{display:block;font-size:.75em;color:var(--field-ink);font-weight:850;margin-top:9px}body .hero-description{font-size:14px;line-height:1.95;max-width:430px;margin-top:26px}body .hero-button{min-width:224px;min-height:56px;justify-content:space-between;margin-top:28px;padding-inline:22px}body .hero-footnote{font-size:11px;margin-top:18px}body .hero-visual{padding-top:0;position:relative}.field-visual-register{display:flex;justify-content:space-between;align-items:center;padding:11px 15px;background:var(--field-ink);color:#e4dfd4;font:10px var(--font-mono);letter-spacing:.08em}.field-visual-register>span:last-child{font-size:18px;line-height:1}body .visualization-home{background:linear-gradient(#f5f2ea00,#f5f2eaaa),repeating-linear-gradient(90deg,#9c978b26 0 1px,transparent 1px 32px),repeating-linear-gradient(0deg,#9c978b26 0 1px,transparent 1px 32px),#dedbd0;border:1px solid var(--field-line);border-radius:0}body .visualization-home .visualization-topline{padding:20px 22px 0}body .visualization-home .scene-frame{height:278px}body .visualization-home .node-control{background:var(--field-paper);border-radius:0;font-size:12px}body .visualization-home .node-control.is-selected{color:#fff8f0;background:var(--field-signal);border-color:var(--field-ink)}body .visualization-home .visualization-description{min-height:69px;padding:17px 20px 20px;font-size:12px}body .hero-visual-note{display:flex;font-size:10px;margin-top:10px;line-height:1.6}body .hero-visual-note .mono{flex-shrink:0;font-size:10px;font-weight:700}.field-entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--field-ink);margin-bottom:46px}.field-entry{min-width:0;display:flex;flex-direction:column;gap:14px;padding:26px 28px;background:var(--field-paper);border-right:1px solid var(--field-line);transition:background .16s}.field-entry:last-child{border-right:0}.field-entry:hover{background:#f0e0d8}.field-entry-index{font:10px var(--font-mono);letter-spacing:.08em;color:var(--field-muted)}.field-entry strong{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:21px}.field-entry>span:last-child{color:var(--field-muted);font-size:12px;line-height:1.8}body .home-journey{border-top:0;padding-block:0 62px}body .journey-heading{padding-bottom:24px;border-bottom:1px solid var(--field-line)}body .journey-heading h2{font-size:26px;font-weight:750;margin-top:10px}body .journey-steps{gap:32px;margin-top:28px}body .journey-step-top .mono{font-size:34px;letter-spacing:-.06em;color:#8b887f}body .journey-step h3{font-size:17px}body .journey-step p{font-size:12px}body .learn-page{padding-block:56px 64px}body .learn-heading{padding-bottom:36px;border-bottom:1px solid var(--field-ink)}body .learn-heading h1{font-weight:800}body .map-progress{padding:22px;background:var(--field-paper);border:1px solid var(--field-line)}body .learning-toolbar{margin-top:0}body .mode-option.is-active{background:var(--field-ink);color:#fff8f0;border-color:var(--field-ink);box-shadow:none}body .map-start-banner{background:var(--field-paper);border:1px solid var(--field-line);border-left:5px solid var(--field-signal);border-radius:0}body .map-start-label{color:var(--field-ink)}body .stage-marker{border-radius:0;background:var(--field-paper);font-family:var(--font-mono)}body .map-stage:first-child .stage-marker{background:var(--field-signal);color:#fff8f0;border-color:var(--field-signal)}body .lesson-card{border-radius:0;border-color:var(--field-line);box-shadow:none}body a.lesson-card{border-top:3px solid var(--field-ink)}body a.lesson-card:hover{background:#f0e0d8;border-color:var(--field-ink);box-shadow:4px 4px #c9c5bb}body .lesson-number{font-size:23px;color:var(--field-muted)}body .lesson-card-top{margin-bottom:18px}body .is-locked{background:#dfdcd2;border-style:dashed}body .status-card-completed{border-top-color:var(--color-success)}body .lesson-heading{padding-bottom:28px;border-bottom:1px solid var(--field-line)}body .learning-goal{background:var(--field-paper);border-color:var(--field-line);border-left:4px solid var(--field-ink)}body .explanation-card,body .concept-card,body .lesson-completion{box-shadow:none;border-color:var(--field-line)}body .cl-home{padding-top:54px}body .cl-hero{padding-bottom:40px;border-bottom:2px solid var(--field-ink)}body .cl-hero h1{font-size:clamp(32px,4.3vw,60px);line-height:1.2;letter-spacing:-.055em;margin-top:18px;font-weight:850}body .cl-hero .heading-soft{display:block;color:var(--field-ink)}body .cl-hero .page-intro{font-size:14px}body .cl-hero-note{background:var(--field-ink);color:#d0cabf;border-radius:0;border-color:var(--field-ink);padding:25px;min-width:218px}body .cl-hero-note strong{color:#fff8f0}body .cl-hero-note svg{color:#f2a08f}body .cl-hero-note strong{font:700 23px var(--font-mono)}body .cl-modules,body .cl-relation{padding-top:34px}body .cl-section-heading>div>span{border-radius:0;border-color:var(--field-ink);color:var(--field-ink);font:11px var(--font-mono)}body .cl-section-heading h2{font-size:22px}body .cl-section-heading p{font-size:12px}body .cl-card-grid{gap:24px}body .cl-module-card{border:1px solid var(--field-line);border-top:4px solid var(--field-ink);border-radius:0;padding:28px 30px 24px;background:var(--field-paper);position:relative;min-height:350px}body .cl-module-card.is-rag,body .cl-module-card.is-agent{background:var(--field-paper)}body .cl-module-card:hover{transform:none;box-shadow:5px 5px #c3beb2;border-color:var(--field-ink)}.field-module-code{display:flex;align-items:center;justify-content:space-between;gap:10px;font:10px var(--font-mono);color:var(--field-muted);padding-bottom:24px}.field-module-code b{font-size:36px;line-height:1;letter-spacing:-.06em;color:var(--field-ink)}body .cl-module-card .cl-card-icon{position:absolute;top:90px;right:30px;width:38px;height:38px;border:1px solid var(--field-line);border-radius:0;background:transparent;color:var(--field-ink)}body .cl-card-kicker{margin-top:18px;color:var(--field-muted);font:10px var(--font-mono);letter-spacing:.04em;padding-right:40px}body .cl-module-card h3{font-size:clamp(23px,2.25vw,33px);margin:14px 0 12px;font-weight:800;padding-right:16px}body .cl-module-card p{font-size:13px;max-width:480px;margin-bottom:30px}body .cl-card-progress{background:#d9d4ca;border-radius:0;height:4px}body .cl-card-progress i{background:#c8432e}body .cl-card-meta{color:var(--field-muted)}body .cl-card-foot{border-top-color:var(--field-line);font-size:13px;margin-top:18px;padding-top:18px}body .cl-card-foot svg{box-sizing:content-box;background:var(--field-signal);padding:7px;color:#fff8f0}body .cl-relation-map{border-radius:0;background:var(--field-paper);border-color:var(--field-line);padding:26px}body .cl-relation-map>div{border-radius:0;background:#e7e2d8;border-left:3px solid var(--field-ink);padding:18px}body .cl-relation-map>div svg,body .cl-relation-arrow{color:var(--field-ink)}@media(min-width:1600px){body .home-hero{padding-block:72px 62px}body .visualization-home .scene-frame{height:335px}}@media(max-width:1200px){body .page-width{width:calc(100% - 64px)}body .brand-caption,body .brand-divider{display:none}body .main-nav a{padding-inline:12px}body .home-hero{gap:32px}.field-entry{padding:24px 20px}.field-entry strong{font-size:18px}}@media(max-width:900px){body .header-inner{height:auto;min-height:80px;flex-wrap:wrap;padding-block:18px 0;gap:18px}body .main-nav{order:3;flex:1 0 100%;justify-content:space-between;gap:0}body .main-nav a{justify-content:center;padding:15px 12px;flex:1}body .header-cta{margin-left:auto}.field-masthead-status{display:none}body .home-hero{grid-template-columns:1fr;padding-block:40px;gap:34px}body .hero-copy h1{font-size:clamp(42px,8vw,72px)}body .hero-heading-soft,.field-title-main{display:inline}body .hero-visual{max-width:680px;width:100%;margin-inline:auto}.field-entry-grid{grid-template-columns:1fr}.field-entry{border-right:0;border-bottom:1px solid var(--field-line);padding:22px;gap:10px}.field-entry:last-child{border-bottom:0}body .cl-hero{grid-template-columns:1fr;gap:24px}body .cl-hero-note{width:fit-content}body .cl-card-grid,body .cl-relation-map{grid-template-columns:1fr}}@media(max-width:600px){body .page-width{width:calc(100% - 36px)}body .brand{font-size:19px;gap:9px}body .brand-mark{width:34px;height:34px}body .header-cta{font-size:12px;padding:10px 12px}body .main-nav a{font-size:11px;padding:11px 3px;gap:5px;flex-direction:column;white-space:nowrap}.nav-index{font-size:8px;align-self:auto}.field-masthead{padding-block:16px;font-size:9px}.field-masthead>span:last-child{display:none}body .hero-copy h1{font-size:42px}.field-title-main,body .hero-heading-soft{display:block}body .hero-heading-soft{font-size:.82em}.field-title-prelude{font-size:19px}body .hero-description{font-size:13px}body .hero-footnote{font-size:10px;gap:5px}body .hero-visual-note{font-size:10px}body .visualization-home .scene-frame{height:255px}body .visualization-home .node-control{padding:8px;font-size:11px;gap:5px}body .visualization-home .node-controls{padding-inline:8px;gap:5px}body .visualization-home .node-control-wrap{gap:5px}body .journey-heading{align-items:flex-start;flex-direction:column}body .journey-heading h2{font-size:22px}body .journey-steps{grid-template-columns:1fr;gap:24px}body .journey-step{padding-right:0;border-right:0;border-bottom:1px solid var(--field-line);padding-bottom:22px}body .journey-step-top{margin-bottom:12px}body .learn-heading{flex-direction:column;align-items:stretch;gap:24px}body .map-progress{min-width:0;max-width:none}body .map-start-banner{padding:20px}body .cl-home{padding-top:34px}body .cl-hero h1{font-size:37px}body .cl-module-card{padding:24px}body .cl-card-icon{right:24px}body .cl-relation-map{padding:20px}body .site-footer{align-items:flex-start;justify-content:center;flex-direction:column;padding-block:25px;gap:14px}body .footer-brand{flex-wrap:wrap;gap:10px}}@media(prefers-reduced-motion:reduce){.field-entry,body .cl-module-card,body a.lesson-card{transition:none}}body .al-app,body .rgx-app,body .rgs-app{--al-ink: var(--field-ink, #262623);--al-muted: var(--field-muted, #68675f);--al-line: var(--field-line, #c9c5bb);--rgx-ink: var(--field-ink, #262623);--rgx-muted: var(--field-muted, #68675f);--rgx-line: var(--field-line, #c9c5bb);--rgx-bg: #e8e5dc;--rgs-ink: var(--field-ink, #262623);--rgs-muted: var(--field-muted, #68675f);--rgs-line: var(--field-line, #c9c5bb);color:var(--field-ink, #262623);background:#e8e5dc;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}body .al-header,body .rc-header{position:relative;min-height:68px;height:68px;padding-inline:clamp(22px,3.2vw,48px);border-bottom:1px solid #4c4a44;background:var(--field-ink, #262623);color:var(--field-paper, #f5f2ea)}body .al-header:before,body .rc-header:before{content:"";position:absolute;inset:0 auto 0 0;width:5px;background:var(--field-signal, #c8432e);pointer-events:none}body .al-brand,body .rc-brand{color:var(--field-paper, #f5f2ea);gap:12px}body .al-brand-mark,body .rc-brand>span{width:34px;height:34px;border-radius:2px;background:var(--field-signal, #c8432e);color:#fff8f0;transform:none}body .al-brand>strong,body .rc-brand strong{font-weight:800;font-size:21px;letter-spacing:-.6px}body .al-brand>strong>span{color:var(--field-paper, #f5f2ea);font-weight:500}body .al-brand>i,body .rc-brand i{background:#605e58}body .al-brand-sub,body .rc-brand small,body .al-header-right>a,body .rc-back{color:#bcbab4;font-size:11px}body .al-header-nav{margin-right:0}body .al-header-nav>a,body .al-header-nav>button,body .rc-header nav a{color:#c3c1bb;font-size:12px}body .al-header-nav>a:hover,body .al-header-nav>button:hover,body .rc-header nav a:hover,body .al-header-nav>span,body .rc-header nav span[aria-current=page]{color:#fff8f0}body .al-header-nav>span:after,body .rc-header nav span[aria-current=page]:after{height:3px;background:var(--field-signal, #c8432e)}body .al-sample-tag{border-color:#615f59;border-radius:2px;color:#cbc9c3;font:9px/1.6 Consolas,Courier New,monospace;letter-spacing:.8px}body .al-page-topline,body .rgx-topline{min-height:48px;padding-top:12px;padding-bottom:10px;border-bottom:1px solid var(--field-line, #c9c5bb);color:var(--field-muted, #68675f);font:10px/1.5 Consolas,Courier New,monospace;letter-spacing:.35px}body .al-completion{border:1px solid var(--field-line, #c9c5bb);border-radius:2px;background:#e8e6e0}body .al-completion.is-completed{border-color:#a8c7b0;background:#eaf5ed}body .al-intro,body .rgx-intro,body .rgs-hero{position:relative;padding-top:34px;padding-bottom:32px}body .al-eyebrow,body .rgx-intro>div>p,body .rgs-hero>div:first-child>p,body .rgx-portfolio-heading p{color:var(--field-muted, #68675f);font:10px/1.5 Consolas,Courier New,monospace;font-weight:700;letter-spacing:1.3px}body .al-eyebrow>span{width:19px;height:5px;background:var(--field-ink, #262623)}body .al-intro h1{margin-top:12px;font-size:clamp(32px,3.25vw,51px);font-weight:800;letter-spacing:-1.8px;line-height:1.25}body .al-intro h1>span:first-child{color:var(--field-ink, #262623);box-shadow:inset 0 -.055em 0 var(--field-signal, #c8432e)}body .al-intro .al-title-loop{color:#95938d;font-size:44px}body .al-intro p{margin-top:14px;color:var(--field-muted, #68675f);font-size:13px}body .al-lesson-tags{flex-shrink:0;padding:20px 0 20px 24px;border-left:1px solid var(--field-line, #c9c5bb);color:var(--field-ink, #262623);font-size:11px}body .al-lesson-tags>div{color:var(--field-muted, #68675f);font:10px/1.5 Consolas,Courier New,monospace}body .al-prediction-card{padding:18px 20px;border-color:var(--field-line, #c9c5bb);border-left:4px solid var(--field-ink, #262623);border-radius:2px;background:var(--field-paper, #f5f2ea)}body .al-prediction-card>div:first-child span,body .al-agent-summary span{color:var(--field-muted, #68675f);font:9px/1.5 Consolas,Courier New,monospace;font-weight:700;letter-spacing:1px}body .al-prediction-card>div:first-child strong{font-size:14px;line-height:1.65}body .al-prediction-card button{min-height:38px;padding:9px 13px;border-color:var(--field-line, 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