@font-face{font-family:GeistSans;src:url(/_next/static/media/0b78ff376f6b9734-s.p.woff2) format("woff2");font-display:swap;font-weight:100 900}@font-face{font-family:GeistSans Fallback;src:local("Arial");ascent-override:94.56%;descent-override:27.76%;line-gap-override:0.00%;size-adjust:106.28%}.__className_8adcd2{font-family:GeistSans,GeistSans Fallback}.__variable_8adcd2{--font-geist-sans:"GeistSans","GeistSans Fallback"}@font-face{font-family:GeistMono;src:url(/_next/static/media/723e11e5093b8e80.p.woff2) format("woff2");font-display:swap;font-weight:100 900}.__className_46451f{font-family:GeistMono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}.__variable_46451f{--font-geist-mono:"GeistMono",ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}@font-face{font-family:GeistPixelSquare;src:url(/_next/static/media/fea0c6ef863f2f98.p.woff2) format("woff2");font-display:swap;font-weight:500}.__className_84fa68{font-family:GeistPixelSquare,Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace;font-weight:500}.__variable_84fa68{--font-geist-pixel-square:"GeistPixelSquare",Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}@font-face{font-family:GeistPixelGrid;src:url(/_next/static/media/c22e49768d55261c.p.woff2) format("woff2");font-display:swap;font-weight:500}.__className_106fa7{font-family:GeistPixelGrid,Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace;font-weight:500}.__variable_106fa7{--font-geist-pixel-grid:"GeistPixelGrid",Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}@font-face{font-family:GeistPixelCircle;src:url(/_next/static/media/f27110d8825a0741.p.woff2) format("woff2");font-display:swap;font-weight:500}.__className_1e56e8{font-family:GeistPixelCircle,Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace;font-weight:500}.__variable_1e56e8{--font-geist-pixel-circle:"GeistPixelCircle",Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}@font-face{font-family:GeistPixelTriangle;src:url(/_next/static/media/ec8abdbe794bcfee.p.woff2) format("woff2");font-display:swap;font-weight:500}.__className_985ebc{font-family:GeistPixelTriangle,Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace;font-weight:500}.__variable_985ebc{--font-geist-pixel-triangle:"GeistPixelTriangle",Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}@font-face{font-family:GeistPixelLine;src:url(/_next/static/media/f493556a762f9dcd.p.woff2) format("woff2");font-display:swap;font-weight:500}.__className_e746ad{font-family:GeistPixelLine,Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace;font-weight:500}.__variable_e746ad{--font-geist-pixel-line:"GeistPixelLine",Geist Mono,ui-monospace,SFMono-Regular,Roboto Mono,Menlo,Monaco,Liberation Mono,DejaVu Sans Mono,Courier New,monospace}

/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,::backdrop,:after,:before{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-outline-style:solid}}}@layer theme{:host,:root{--font-sans:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;--spacing:.25rem;--text-base:1rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,::backdrop,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}:host,html{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,pre,samp{font-family:var(--default-mono-font-family,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}menu,ol,ul{list-style:none}audio,canvas,embed,iframe,img,object,svg,video{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,optgroup,select,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab,red,red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit,::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-millisecond-field,::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden}.absolute,.sr-only{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.contents{display:contents}.hidden{display:none}.inline{display:inline}.shrink{flex-shrink:1}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.rounded{border-radius:.25rem}.outline{outline-style:var(--tw-outline-style);outline-width:1px}}:root{color-scheme:dark;--paper:#0c0c0e;--paper-deep:#131316;--panel:#111113;--ink:#ededed;--ink-soft:#b8b8bc;--muted:#a0a0a6;--line:#26262b;--line-strong:#3f3f46;--control-line:#76767f;--accent:#52a8ff;--violet:#b494ff;--new-code:#152132;--header-bg:#0c0c0e;--figure-bg:#131316;--active-surface:#152132;--diagram-blue:#131a25;--diagram-violet:#1c1726;--code-ink:#dadadd;--line-number:#93939a;--syntax-keyword:#b899ff;--syntax-string:#85e0b9;--syntax-title:#70b8ff;--syntax-number:#f9bc76;--syntax-comment:#9b9ba1;--syntax-type:#d9a2eb;--accent-ring:#52a8ff47;--accent-clear:#52a8ff00;--backdrop:#070708cc;--breakpoint:#f47b7b;--current-line:#52a8ff;--on-accent:#0e0e11;--header-height:56px;--text-small:12px;--text-base:16px;--text-title:30px;--sans:var(--font-geist-sans),ui-sans-serif,system-ui,sans-serif;--mono:var(--font-geist-mono),ui-monospace,monospace;--pixel:var(--font-geist-pixel-square),ui-monospace,monospace}:root[data-theme=light]{color-scheme:light;--paper:#f9f9fa;--paper-deep:#f1f1f3;--panel:#fcfcfd;--ink:#17171c;--ink-soft:#4e4e56;--muted:#5e5e68;--line:#dcdce0;--line-strong:#b7b7be;--control-line:#76767f;--accent:#1157a7;--violet:#5d2ea8;--new-code:#e6eefa;--header-bg:#f9f9fa;--figure-bg:#f4f4f6;--active-surface:#e6eefa;--diagram-blue:#eef4fc;--diagram-violet:#f6f3fc;--code-ink:#2f2f37;--line-number:#5f5f67;--syntax-keyword:#53279b;--syntax-string:#126843;--syntax-title:#0c4d97;--syntax-number:#8e4510;--syntax-comment:#5c5c66;--syntax-type:#74248f;--accent-ring:#1157a738;--accent-clear:#1157a700;--backdrop:#12121680;--breakpoint:#af1d1d;--current-line:#1157a7;--on-accent:#fff}*{box-sizing:border-box}html{scroll-behavior:auto;scrollbar-color:var(--line-strong) var(--paper)}body,html{background:var(--paper);color:var(--ink);overscroll-behavior:none}body{min-width:320px;font-family:var(--sans);font-size:var(--text-base);-webkit-font-smoothing:antialiased;margin:0;overflow-x:hidden}.article-body blockquote,.article-body code:not(pre code),.article-code,.chapter-nav,.code-line,.code-panel,.code-stage,.code-tab,.concept-figure,.file-tree,.file-tree button,.lesson-figure,.map-detail,.map-node,.map-panel,.panel-heading,.site-header,.syntax-block,body{transition:background-color .22s cubic-bezier(.16,1,.3,1),color .18s,border-color .18s}a,button{-webkit-tap-highlight-color:transparent}button{color:inherit;font:inherit}[tabindex]:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}::selection{background:var(--accent);color:var(--on-accent)}.site-header{z-index:50;height:var(--header-height);border-bottom:1px solid var(--line);background:var(--header-bg);grid-template-columns:1fr auto 1fr;align-items:center;padding:0 clamp(18px,3vw,48px);display:grid;position:fixed;top:0;left:0;right:0}.brand{cursor:pointer;white-space:nowrap;background:0 0;border:0;align-items:center;gap:9px;padding:0;display:flex}.brand-mark{border:1px solid var(--accent);background:var(--active-surface);width:26px;height:26px;color:var(--accent);border-radius:4px;place-items:center;display:grid}.brand strong,.brand-mark{font-family:var(--pixel);font-size:20px}.brand strong{font-weight:400}.chapter-nav{place-self:stretch center;display:flex}.chapter-nav button{min-width:112px;color:var(--muted);font-family:var(--mono);font-size:var(--text-small);cursor:pointer;background:0 0;border:0;padding:0 16px;position:relative}.chapter-nav button:after{content:"";background:var(--accent);height:2px;transition:transform .22s cubic-bezier(.16,1,.3,1);position:absolute;bottom:-1px;left:16px;right:16px;transform:scaleX(0)}.chapter-nav button:hover{color:var(--ink)}.chapter-nav button.is-active{color:var(--accent);background:var(--active-surface)}.chapter-nav button.is-active:after{transform:scaleX(1)}.header-actions{justify-self:end;align-items:center;gap:4px;display:flex}.repo-link,.theme-toggle{width:36px;height:36px;color:var(--muted);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:6px;place-items:center;padding:0;transition:color .18s,border-color .18s,background-color .18s;display:grid}.repo-link:hover,.theme-toggle:hover{border-color:var(--line);background:var(--paper-deep);color:var(--ink)}.repo-link:focus-visible,.theme-toggle:focus-visible{outline:1px solid var(--accent);outline-offset:2px}.theme-icon{grid-area:1/1;transition:opacity .18s,transform .24s cubic-bezier(.16,1,.3,1)}.theme-icon-sun{opacity:0;transform:rotate(-35deg)scale(.75)}:root[data-theme=dark] .theme-icon-moon{opacity:0;transform:rotate(35deg)scale(.75)}:root[data-theme=dark] .theme-icon-sun{opacity:1;transform:rotate(0)scale(1)}.menu-button{cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;width:36px;height:36px;padding:0;display:none}.reader-shell{min-height:100vh;padding-top:var(--header-height)}.reading-progress{z-index:60;top:calc(var(--header-height) - 1px);pointer-events:none;height:1px;position:fixed;left:0;right:0}.reading-progress span{background:var(--accent);height:100%;transition:width 90ms linear;display:block}.reader-grid,.site-footer{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(32px,4vw,64px);width:min(100%,1800px);margin:0 auto;padding:0 clamp(24px,3.6vw,64px) 84px;display:grid}.site-footer{border-top:1px solid var(--line);color:var(--muted);padding-top:24px;padding-bottom:32px;font-size:14px;line-height:1.7}.site-footer p{max-width:680px;margin:0}.site-footer a{color:var(--accent);white-space:nowrap;text-underline-offset:3px;text-decoration:underline}.site-footer a:hover{color:var(--ink)}.lesson-column{min-width:0;padding-bottom:72px}.lesson-header{border-bottom:1px solid var(--line);padding:56px 0 40px;position:relative}.lesson-header:after{content:"";background:linear-gradient(90deg,var(--accent),var(--violet));opacity:.65;pointer-events:none;height:16px;position:absolute;bottom:0;left:0;right:0;-webkit-mask:url(/dither-wash.svg) 0 100%/8px 64px repeat-x;mask:url(/dither-wash.svg) 0 100%/8px 64px repeat-x}.lesson-header h1{font-family:var(--pixel);letter-spacing:-.025em;text-wrap:balance;margin:0;font-size:clamp(30px,2.7vw,40px);font-weight:400;line-height:1.2}.lesson-description{max-width:620px;color:var(--ink-soft);font-size:var(--text-base);margin:16px 0 0;line-height:1.8}.lesson-meta{color:var(--muted);font-family:var(--mono);font-size:var(--text-small);gap:22px;margin-top:26px;display:flex}.article-body{--article-gap:20px;--article-section-gap:40px;max-width:680px;font-size:var(--text-base);padding:32px 0 0;line-height:1.82}.article-body h1:first-of-type{display:none}.article-fragment{display:contents}.article-body h2{margin:var(--article-section-gap) 0 var(--article-gap);border-top:1px solid var(--line);font-family:var(--pixel);font-size:var(--text-title);letter-spacing:-.02em;padding-top:14px;font-weight:400;line-height:1.4}.article-body h3{margin:var(--article-gap) 0;font-size:var(--text-base);font-weight:700}.article-body p{margin:0 0 var(--article-gap)}.article-body a{color:var(--accent);-webkit-text-decoration-color:var(--line-strong);text-decoration-color:var(--line-strong);text-underline-offset:4px}.article-body a:hover{-webkit-text-decoration-color:var(--accent);text-decoration-color:var(--accent)}.article-body code:not(pre code){border:1px solid var(--line);background:var(--paper-deep);color:var(--ink);font-family:var(--mono);font-size:var(--text-small);border-radius:4px;padding:2px 5px}.article-body blockquote{margin:0 0 var(--article-gap);border-left:1px solid var(--accent);background:var(--paper-deep);color:var(--ink-soft);padding:16px 20px}.article-body blockquote p:last-child{margin-bottom:0}.nudge-card{border:1px solid var(--line-strong);background:var(--active-surface);grid-template-columns:minmax(0,1fr) 118px;align-items:center;gap:20px;margin:4px 0 28px;padding:18px 20px;display:grid;position:relative;overflow:hidden}.nudge-card:before{content:"";background:var(--accent);width:1px;position:absolute;top:0;bottom:0;left:0}.nudge-copy{min-width:0}.nudge-kicker{color:var(--muted);font-family:var(--mono);font-size:var(--text-small);margin-bottom:2px;display:block}.nudge-copy p{flex-wrap:wrap;align-items:baseline;gap:7px;margin:0;line-height:1.35;display:flex}.nudge-copy strong{color:var(--ink);font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:24px;font-weight:600}.nudge-copy p span{color:var(--ink-soft);white-space:nowrap;font-size:13px}.nudge-copy small{color:var(--muted);font-size:var(--text-small);margin-top:3px;line-height:1.5;display:block}.nudge-button{border:1px solid var(--ink);background:var(--ink);width:118px;min-width:118px;max-width:118px;height:42px;color:var(--paper);cursor:pointer;white-space:nowrap;justify-content:center;align-items:center;gap:8px;padding:0 16px;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .18s,background-color .18s;display:flex;position:relative}.nudge-button:hover{background:var(--violet)}.nudge-button:active{transform:translateY(1px)}.nudge-button svg{transform-origin:50% 10%;flex:none}.nudge-plus{opacity:0;color:var(--accent);font-family:var(--mono);font-size:var(--text-small);pointer-events:none;font-weight:700;position:absolute;top:-12px;right:8px}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.syntax-block{margin:0 0 var(--article-gap);border:1px solid var(--line);background:var(--paper-deep);overflow-anchor:none}.syntax-toggle{color:var(--muted);font-family:var(--mono);font-size:var(--text-small);cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;font-weight:500;display:flex}.syntax-toggle::-webkit-details-marker{display:none}.syntax-toggle:after{content:"+";color:var(--muted);font-weight:400}.syntax-block[open] .syntax-toggle:after{content:"−"}.syntax-toggle:hover{color:var(--ink-soft)}.syntax-body{font-size:var(--text-small);padding:0 14px 12px;line-height:1.85}.syntax-body>:last-child{margin-bottom:0}.article-body ol,.article-body ul{margin:0 0 var(--article-gap);padding-left:24px}.article-body li{margin:7px 0;padding-left:4px}.article-code{margin:0 0 var(--article-gap);border:1px solid var(--line);background:var(--paper-deep);color:var(--ink);font-family:var(--mono);font-size:var(--text-small);tab-size:2;padding:20px 22px;line-height:1.75;position:relative;overflow-x:auto}.article-code:before{content:attr(data-language);width:max-content;color:var(--muted);font-size:var(--text-small);margin-bottom:14px;display:block;position:sticky;left:0}.concept-figure{margin:0 0 var(--article-gap);border:1px solid var(--line);background:var(--paper);padding:20px}.concept-mark{align-items:center;gap:8px;margin-bottom:14px;display:flex}.concept-mark span{background:var(--line-strong);width:28px;height:2px;display:block}.concept-mark span:nth-child(2){background:var(--accent);width:54px}.concept-figure figcaption{color:var(--ink-soft);font-size:var(--text-small);line-height:1.7}.lesson-figure{margin:0 0 var(--article-gap);border:1px solid var(--line);background:var(--figure-bg);padding:10px}.lesson-figure img{width:100%;height:auto;transition:filter .22s,opacity .22s;display:block}:root[data-theme=dark] .lesson-figure img{filter:brightness(.72)saturate(.82);opacity:.92}.lesson-figure figcaption{color:var(--muted);font-size:var(--text-small);margin-top:10px;padding:0 4px 2px;line-height:1.6}.mermaid-figure{border:1px solid var(--line);background:var(--figure-bg);border-radius:8px;margin:24px 0 32px;padding:24px}.mermaid-diagram{place-items:center;min-height:192px;display:grid;overflow-x:auto}.mermaid-diagram svg{width:100%;height:auto;max-height:640px;display:block}.mermaid-figure figcaption{color:var(--ink-soft);margin-top:16px;font-size:14px;line-height:1.6}.mermaid-diagram .node{--node-fill:var(--diagram-blue-fill);--node-accent:var(--accent);filter:none!important}.mermaid-diagram .node:nth-child(2n){--node-fill:var(--diagram-violet-fill);--node-accent:var(--violet)}.mermaid-diagram .actor,.mermaid-diagram .node circle,.mermaid-diagram .node ellipse,.mermaid-diagram .node path,.mermaid-diagram .node polygon,.mermaid-diagram .node rect{fill:var(--node-fill,var(--diagram-blue-fill))!important;stroke:var(--node-accent,var(--accent))!important;stroke-width:1.25px!important;filter:none!important}.mermaid-diagram .edgeLabel,.mermaid-diagram .labelText,.mermaid-diagram .messageText,.mermaid-diagram .nodeLabel,.mermaid-diagram text{fill:var(--ink)!important;color:var(--ink)!important;font-family:var(--sans)!important}.mermaid-diagram .cluster rect,.mermaid-diagram .edgeLabel rect,.mermaid-diagram .labelBkg{fill:var(--figure-bg)!important}.mermaid-diagram .actor-line,.mermaid-diagram .flowchart-link,.mermaid-diagram .messageLine0,.mermaid-diagram .messageLine1,.mermaid-diagram marker path{stroke:var(--accent)!important}.mermaid-diagram marker path{fill:var(--accent)!important}.article-body details{border-bottom:1px solid var(--line-strong);margin:0 0 24px}.article-body summary{color:var(--ink-soft);cursor:pointer;padding:12px 0;font-size:14px;font-weight:600}.article-body summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.article-body .diagram-source{border:0;margin:8px 0 0}.diagram-source pre{background:var(--paper);max-width:100%;padding:12px;font-size:12px;line-height:1.6;overflow-x:auto}.panel-checkpoint{min-width:0;color:var(--ink-soft);text-overflow:ellipsis;white-space:nowrap;font-family:var(--sans);margin-left:16px;overflow:hidden}.checkpoint-anchor{height:0;scroll-margin-top:calc(var(--header-height) + 28px);margin:0;padding:0;display:block}.lesson-footer{border-top:1px solid var(--line);max-width:680px;font-family:var(--mono);font-size:var(--text-small);justify-content:flex-end;align-items:center;gap:20px;margin-top:28px;padding-top:16px;display:flex}.lesson-footer button{border:0;border-bottom:1px solid var(--ink);cursor:pointer;background:0 0;padding:10px 0}.panel-column{min-width:0;padding-top:24px}.code-panel,.map-panel{top:calc(var(--header-height) + 24px);height:calc(100dvh - var(--header-height) - 48px);border:1px solid var(--line-strong);background:var(--panel);overscroll-behavior:contain;min-height:580px;position:sticky;overflow:hidden}@media (min-width:1181px){.code-panel[data-viewport-pinned=true]{left:var(--panel-fixed-left);width:var(--panel-fixed-width);position:fixed}}.panel-heading{border-bottom:1px solid var(--line);background:var(--paper);height:52px;font-family:var(--mono);font-size:var(--text-small);justify-content:flex-start;align-items:center;padding:0 18px;display:flex}.panel-heading strong{font-weight:600}.editor-lock{width:30px;height:30px;color:var(--muted);cursor:pointer;background:0 0;border:0;place-items:center;margin-left:auto;padding:0;display:grid}.editor-lock.is-active,.editor-lock:hover{background:var(--paper-deep);color:var(--ink)}.editor-lock:focus-visible{outline:1px solid var(--accent);outline-offset:1px}.map-stage{height:calc(100% - 140px);min-height:390px;position:relative;overflow:hidden}.map-stage canvas{z-index:0;pointer-events:none;position:absolute;inset:0}.map-node{z-index:2;border:1px solid var(--line-strong);background:var(--paper);text-align:left;cursor:pointer;align-content:center;gap:5px;width:clamp(112px,18%,164px);min-height:74px;padding:12px 14px;transition:transform .32s cubic-bezier(.16,1,.3,1),border-color .18s,background .18s;display:grid;position:absolute}.map-node:hover{border-color:var(--ink);transform:translateY(-3px)}.map-node.is-active{border-color:var(--accent);background:var(--active-surface);transform:translateY(-3px)}.map-node.is-active:after{content:"";background:var(--accent);border-radius:50%;width:5px;height:5px;animation:map-pulse 1.8s cubic-bezier(.16,1,.3,1) infinite;position:absolute;top:10px;right:10px}.map-node span{font-family:var(--mono);font-size:var(--text-base);font-weight:600}.map-node small{color:var(--muted);font-size:var(--text-small)}.map-node-tui{top:42%;left:4%}.map-node-cli{top:42%;left:25%}.map-node-agent{top:42%;left:47%}.map-node-llm{top:16%;right:5%}.map-node-tools{bottom:15%;right:5%}.map-context,.map-events{z-index:1;background:var(--panel);color:var(--muted);font-family:var(--mono);font-size:var(--text-small);padding:3px 6px;position:absolute}.map-context{top:31%;right:25%}.map-events{bottom:31%;right:24%}.map-detail{border-top:1px solid var(--line);background:var(--paper);grid-template-columns:112px 1fr;align-items:center;gap:18px;height:88px;padding:0 18px;display:grid}.map-detail span{font-family:var(--mono);font-size:var(--text-small);font-weight:600}.map-detail p{color:var(--ink-soft);font-size:var(--text-small);margin:0;line-height:1.6}.repo-workspace{grid-template-columns:146px minmax(0,1fr);height:calc(100% - 52px);display:grid}.file-tree{overscroll-behavior:none;border-right:1px solid var(--line);background:var(--paper-deep);padding:12px 8px;overflow-y:auto}.tree-root{gap:7px;padding:8px 7px 10px;display:flex}.file-tree button,.tree-root{color:var(--ink-soft);font-family:var(--mono);font-size:var(--text-small);align-items:center}.file-tree button{width:100%;min-height:34px;text-align:left;cursor:pointer;background:0 0;border:0;grid-template-columns:16px minmax(0,1fr) 13px;gap:5px;padding:0 7px 0 12px;display:grid;position:relative}.file-tree button.is-new-file{z-index:1;transform-origin:14px;animation:file-birth .82s cubic-bezier(.2,1.45,.32,1) both}.file-tree button.is-active,.file-tree button:hover{background:var(--paper);color:var(--ink)}.file-tree button span{text-overflow:ellipsis;overflow:hidden}.file-check{color:var(--accent)}.empty-tree{color:var(--muted);font-family:var(--mono);font-size:var(--text-small);margin:8px 0 0 26px}.code-stage{background:var(--panel);min-width:0;position:relative;overflow:hidden}.code-tabs{border-bottom:1px solid var(--line);background:var(--paper-deep);scrollbar-width:none;align-items:center;height:36px;display:flex;overflow:auto hidden}.code-tabs::-webkit-scrollbar{display:none}.code-tab{border-right:1px solid var(--line);background:var(--paper);min-width:130px;max-width:190px;height:35px;color:var(--ink-soft);font-family:var(--mono);font-size:var(--text-small);flex:none;align-items:center;display:flex}.code-tab:not(.is-active){background:var(--paper-deep)}.code-tab.is-active{box-shadow:inset 0 2px var(--accent);color:var(--accent)}.code-tab-select{min-width:0;color:inherit;cursor:pointer;background:0 0;border:0;flex:1;align-self:stretch;align-items:center;gap:7px;padding:0 5px 0 12px;display:flex}.code-tab-select span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.code-tab-close{width:28px;height:28px;color:var(--muted);cursor:pointer;opacity:0;background:0 0;border:0;flex:none;place-items:center;margin-right:3px;padding:0;display:grid}.code-tab-close:focus-visible,.code-tab.is-active .code-tab-close,.code-tab:hover .code-tab-close{opacity:1}.code-tab-close:hover{background:var(--line);color:var(--ink)}.code-scroll{overscroll-behavior:none;overflow-anchor:none;scroll-behavior:auto;scrollbar-color:var(--line-strong) transparent;scrollbar-width:thin;visibility:hidden;pointer-events:none;padding:12px 0 22px;position:absolute;inset:36px 0 0;overflow:auto}.code-scroll.is-active{visibility:visible;pointer-events:auto}.code-line{min-width:max-content;min-height:22px;color:var(--code-ink);font-family:var(--mono);font-size:var(--text-small);white-space:pre;grid-template-columns:46px minmax(0,1fr);padding-right:22px;line-height:22px;display:grid;position:relative}.code-line.is-new{background:var(--new-code)}.code-line.is-entering{opacity:1}.code-line.is-new:after{content:"";background:var(--accent);width:2px;position:absolute;top:0;bottom:0;left:0}.line-number{border-right:1px solid var(--line);color:var(--line-number);font-size:var(--text-small);text-align:right;-webkit-user-select:none;user-select:none;padding-right:10px}.code-line code{padding-left:12px}.code-line.is-entering code{clip-path:inset(0 100% 0 0);width:max-content;animation:code-write var(--write-duration,.76s) steps(18) forwards;animation-delay:calc(var(--write-delay,0s) + 90ms);display:block}.empty-code{height:100%;color:var(--muted);text-align:center;place-content:center;justify-items:center;padding:30px;display:grid}.empty-code strong{color:var(--ink-soft);font-family:var(--mono);font-size:var(--text-small);margin-top:14px}.empty-code p{font-size:var(--text-small);margin:7px 0 0}.drawer-backdrop,.drawer-close,.mobile-panel-button{display:none}.hljs-keyword,.hljs-literal,.hljs-selector-tag{color:var(--syntax-keyword)}.hljs-attr,.hljs-string{color:var(--syntax-string)}.hljs-built_in,.hljs-title,.hljs-title.function_{color:var(--syntax-title)}.hljs-number,.hljs-symbol{color:var(--syntax-number)}.hljs-comment,.hljs-quote{color:var(--syntax-comment);font-style:italic}.hljs-class .hljs-title,.hljs-type{color:var(--syntax-type)}[data-lesson=inside-pi] .article-body code:not(pre code){overflow-wrap:anywhere}[data-lesson=inside-pi] .mermaid-diagram{display:block}[data-lesson=inside-pi] .mermaid-diagram svg{max-height:none;margin-inline:auto}[data-lesson=inside-pi] .mermaid-diagram:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.source-notice{color:var(--muted);margin:16px 0 0;font-size:12px;line-height:1.75}.source-file-link,.source-notice a{color:var(--accent);text-underline-offset:3px}.code-panel.is-source-walkthrough{grid-template-rows:52px auto minmax(0,1fr);display:grid}.is-source-walkthrough .repo-workspace{height:auto;min-height:0}.source-location{border-bottom:1px solid var(--line);background:var(--paper-deep);min-width:0;padding:12px 16px}.source-function{color:var(--ink);font-size:14px;font-weight:600}.source-file-link,.source-function{font-family:var(--mono);overflow-wrap:anywhere;line-height:1.5;display:block}.source-excerpt-note,.source-file-link{margin-top:4px;font-size:12px}.source-excerpt-note{color:var(--muted);line-height:1.5;display:block}.walkthrough-controls{align-items:center;gap:8px;margin-top:12px;font-size:12px;display:flex}.walkthrough-controls>span{color:var(--ink-soft);font-family:var(--mono);font-variant-numeric:tabular-nums;margin-right:auto}.walkthrough-controls button{border:1px solid var(--control-line);background:var(--panel);cursor:pointer;border-radius:4px;min-height:32px;padding:4px 8px}.walkthrough-controls button:hover:not(:disabled){background:var(--active-surface);color:var(--accent)}.walkthrough-controls button:disabled{opacity:.45;cursor:default}.source-package{color:var(--muted);font-family:var(--sans);margin-top:2px;font-size:12px;font-weight:400;display:block}.is-source-walkthrough .file-tree button{grid-template-columns:16px minmax(0,1fr);min-height:52px}.is-source-walkthrough .code-line{tab-size:2;grid-template-columns:56px minmax(0,1fr)}.source-gap{border-block:1px dashed var(--line-strong);background:var(--paper-deep);color:var(--muted);font-family:var(--mono);padding:8px 12px;font-size:12px}.mermaid-diagram .node.pi-action :is(rect,circle,ellipse,polygon,path){stroke-width:3px!important}.mermaid-diagram .node.pi-action text{font-weight:600}.trace-shell{min-height:100vh;padding:calc(var(--header-height) + 24px) clamp(20px,3vw,48px) 32px;font-family:var(--mono);font-size:var(--text-small)}.trace-workspace{width:min(100%,1700px);height:calc(100vh - var(--header-height) - 56px);border:1px solid var(--line-strong);background:var(--panel);grid-template-rows:minmax(0,1fr) 52px;grid-template-columns:190px minmax(480px,1fr) minmax(330px,390px);min-height:620px;margin-left:auto;margin-right:auto;display:grid;overflow:hidden}.trace-case-sidebar,.trace-code-pane,.trace-inspector{min-width:0;min-height:0;overflow:hidden}.trace-case-sidebar{border-right:1px solid var(--line-strong);background:var(--paper-deep);grid-template-rows:52px minmax(0,1fr);display:grid}.trace-case-list{overscroll-behavior:none;scrollbar-color:var(--line-strong) transparent;scrollbar-width:thin;padding:8px;overflow-y:auto}.trace-case-list button{width:100%;min-height:42px;color:var(--ink-soft);font-size:var(--text-small);text-align:left;cursor:pointer;background:0 0;border:0;grid-template-columns:28px minmax(0,1fr);align-items:center;gap:5px;padding:0 8px;display:grid}.trace-case-list button span{color:var(--muted)}.trace-case-list button.is-active,.trace-case-list button:hover{background:var(--paper);color:var(--ink)}.trace-code-pane{border-right:1px solid var(--line-strong);grid-template-rows:52px minmax(0,1fr);display:grid}.trace-pane-heading{border-bottom:1px solid var(--line);background:var(--paper);min-width:0;font-family:var(--mono);font-size:var(--text-small);justify-content:space-between;align-items:center;gap:16px;padding:0 16px;display:flex}.trace-pane-heading strong{font-weight:600}.trace-pane-heading span,.trace-pane-heading strong{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.trace-pane-heading span{color:var(--muted)}.trace-repo-workspace{grid-template-columns:132px minmax(0,1fr);min-height:0;display:grid}.trace-file-tree{overscroll-behavior:none;border-right:1px solid var(--line);background:var(--paper-deep);scrollbar-color:var(--line-strong) transparent;scrollbar-width:thin;padding:12px 8px;overflow-y:auto}.trace-file-tree button{width:100%;min-height:34px;color:var(--ink-soft);font-size:var(--text-small);text-align:left;cursor:pointer;background:0 0;border:0;grid-template-columns:16px minmax(0,1fr);align-items:center;gap:5px;padding:0 7px 0 12px;display:grid}.trace-file-tree button span{text-overflow:ellipsis;overflow:hidden}.trace-file-tree button.is-active,.trace-file-tree button:hover{background:var(--paper);color:var(--ink)}.trace-source-stage{background:var(--panel);grid-template-rows:36px minmax(0,1fr);min-width:0;min-height:0;display:grid;overflow:hidden}.trace-code-scroll{background:var(--panel);overscroll-behavior:none;scrollbar-color:var(--line-strong) transparent;scrollbar-width:thin;padding:12px 0 24px;overflow:auto}.trace-code-line{min-width:max-content;min-height:22px;color:var(--code-ink);font-family:var(--mono);font-size:var(--text-small);white-space:pre;grid-template-columns:54px minmax(0,1fr);padding-right:24px;line-height:22px;display:grid;position:relative}.trace-code-line.is-current{background:var(--new-code);box-shadow:inset 2px 0 var(--current-line)}.trace-code-line>button{border:0;border-right:1px solid var(--line);color:var(--line-number);font-family:var(--mono);font-size:var(--text-small);line-height:inherit;text-align:right;cursor:pointer;-webkit-user-select:none;user-select:none;background:0 0;padding:0 10px 0 22px;position:relative}.trace-code-line>button:before{content:"";background:var(--breakpoint);opacity:0;border-radius:50%;width:9px;height:9px;transition:opacity .12s,transform .16s cubic-bezier(.16,1,.3,1);position:absolute;top:7px;left:8px;transform:scale(.75)}.trace-code-line.is-executable>button:hover:before{opacity:.34;transform:scale(1)}.trace-code-line>button.has-breakpoint:before{opacity:1;transform:scale(1)}.trace-code-line>button:disabled{cursor:default}.trace-code-line.is-current>button:after{content:"";border-top:5px solid #0000;border-bottom:5px solid #0000;border-left:6px solid var(--current-line);position:absolute;top:6px;left:2px}.trace-code-line.is-current>button.has-breakpoint:before{box-shadow:0 0 0 2px var(--current-line)}.trace-code-line code{padding-left:12px}.trace-inspector{background:var(--paper);grid-template-rows:52px auto minmax(0,1fr);display:grid}.trace-inspector-scroll{overscroll-behavior:none;scrollbar-color:var(--line-strong) transparent;scrollbar-width:thin;overflow-y:auto}.trace-context-panel,.trace-event-panel,.trace-prompt-panel,.trace-stack-panel,.trace-variable-panel{border-bottom:1px solid var(--line);padding:16px}.trace-context-panel h3,.trace-event-panel h3,.trace-prompt-panel h3,.trace-stack-panel h3,.trace-variable-panel h3{font-size:var(--text-small);margin:0;font-weight:600}.trace-prompt-panel{background:var(--paper-deep)}.trace-prompt-panel p{color:var(--ink-soft);margin:8px 0 0;line-height:1.55}.trace-context-panel>header,.trace-variable-panel>header{justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:12px;display:flex}.trace-context-panel>header span,.trace-variable-panel>header span{color:var(--muted);font-size:var(--text-small);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.trace-variable-panel dl{border:1px solid var(--line);background:var(--panel);margin:0}.trace-variable-panel dl>div{border-bottom:1px solid var(--line);grid-template-columns:132px minmax(0,1fr);display:grid}.trace-variable-panel dl>div:last-child{border-bottom:0}.trace-variable-panel dt{min-width:0;color:var(--muted);overflow-wrap:anywhere;padding:8px 10px}.trace-variable-panel dd{border-left:1px solid var(--line);min-width:0;margin:0;padding:8px 10px}.trace-variable-panel pre{color:var(--code-ink);font:inherit;white-space:pre-wrap;word-break:break-word;margin:0;line-height:1.55;overflow-x:auto}.trace-stack-panel{padding-left:0;padding-right:0;display:grid}.trace-stack-panel h3{padding:0 16px 10px}.trace-stack-panel button{border:0;border-top:1px solid var(--line);min-height:34px;color:var(--ink-soft);font-size:var(--text-small);text-align:left;cursor:pointer;background:0 0;justify-content:space-between;align-items:center;gap:16px;padding:0 16px;display:flex}.trace-stack-panel button:hover{background:var(--paper-deep);color:var(--ink)}.trace-stack-panel button i{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-style:normal;overflow:hidden}.trace-event-panel pre,.trace-message pre{color:var(--code-ink);font-family:var(--mono);font-size:var(--text-small);white-space:pre-wrap;word-break:break-word;margin:0;line-height:1.65;overflow-x:auto}.trace-event-panel pre{border:1px solid var(--line);background:var(--paper-deep);margin-top:10px;padding:12px}.trace-message>span{color:var(--muted);font-family:var(--mono);font-size:var(--text-small)}.trace-message{background:var(--panel);border:1px solid var(--line);border-bottom:0;padding:12px}.trace-message:last-child{border-bottom:1px solid var(--line)}.trace-message.is-new{border-left:2px solid var(--accent);background:var(--new-code)}.trace-message>span{margin-bottom:8px;display:block}.trace-system-message{border-bottom:1px solid var(--line);background:var(--paper-deep);margin-bottom:10px}.trace-controls{border-top:1px solid var(--line-strong);background:var(--paper);grid-column:1/-1;justify-content:center;align-items:center;gap:4px;padding:0 16px;display:flex;position:relative}.trace-controls button{width:34px;height:34px;color:var(--ink-soft);cursor:pointer;background:0 0;border:1px solid #0000;place-items:center;padding:0;display:grid}.trace-controls button:hover:not(:disabled){border-color:var(--line);background:var(--paper-deep);color:var(--ink)}.trace-controls button:disabled{color:var(--line-strong);cursor:default}.trace-controls .trace-play{border-color:var(--accent);background:var(--accent);color:var(--on-accent)}.code-panel,.trace-workspace{border-radius:10px}.empty-code strong,.panel-heading strong,.trace-pane-heading strong{font-family:var(--pixel);font-size:16px;font-weight:400}.article-code,.nudge-card,.syntax-block{border-radius:8px}.mobile-panel-button,.nudge-button{border-color:var(--accent);background-color:var(--accent);color:var(--on-accent);border-radius:6px}.nudge-button:before{content:"";border-radius:inherit;background:var(--on-accent);opacity:.18;pointer-events:none;position:absolute;inset:0;-webkit-mask:url(/dither-wash.svg) 0 0/8px 64px repeat-x;mask:url(/dither-wash.svg) 0 0/8px 64px repeat-x}.editor-lock,.file-tree button,.trace-case-list button,.trace-controls button,.trace-file-tree button{border-radius:4px}.file-tree button.is-active,.trace-case-list button.is-active,.trace-file-tree button.is-active{background:var(--active-surface);color:var(--accent)}.theme-toggle{border-color:var(--control-line)}.editor-lock.is-active{box-shadow:inset 0 0 0 1px var(--accent);color:var(--accent)}.trace-control-progress{pointer-events:none;height:1px;position:absolute;top:-1px;left:0;right:0}.trace-control-progress span{background:var(--accent);height:100%;transition:width .22s cubic-bezier(.16,1,.3,1);display:block}.trace-empty{text-align:center;place-content:center;display:grid}.trace-empty p:last-child{color:var(--ink-soft)}@keyframes code-grow{0%{opacity:0;filter:blur(3px);transform:translate(-8px,6px)}to{opacity:1;filter:blur();transform:translate(0)}}@keyframes code-write{0%{clip-path:inset(0 100% 0 0)}to{clip-path:inset(0)}}@keyframes file-birth{0%{opacity:0;filter:blur(5px);transform:translate(-18px)scale(.58)}54%{opacity:1;filter:blur();transform:translate(4px)scale(1.09)}74%{transform:translate(-2px)scale(.97)}88%{transform:translate(1px)scale(1.02)}to{opacity:1;transform:translate(0)scale(1)}}@keyframes map-pulse{0%,to{box-shadow:0 0 0 0 var(--accent-ring)}55%{box-shadow:0 0 0 9px var(--accent-clear)}}@media (max-width:1180px){.trace-workspace{grid-template-rows:minmax(520px,62vh) minmax(540px,68vh) 52px;grid-template-columns:174px minmax(0,1fr);height:auto}.trace-case-sidebar{grid-area:1/1}.trace-code-pane{border-right:0;grid-area:1/2}.trace-inspector{border-top:1px solid var(--line-strong);grid-area:2/1/auto/-1}.trace-controls{grid-row:3}.reader-grid,.site-footer{width:min(100%,820px);display:block}.site-footer{padding-bottom:calc(96px + env(safe-area-inset-bottom))}.article-body,.lesson-footer{max-width:none}.panel-column{z-index:82;opacity:0;pointer-events:none;height:min(80vh,760px);padding:0;transition:transform .32s cubic-bezier(.16,1,.3,1),opacity .18s;position:fixed;bottom:12px;left:12px;right:12px;transform:translateY(calc(100% + 24px))}.panel-column.is-mobile-open{opacity:1;pointer-events:auto;transform:translateY(0)}.code-panel,.map-panel{background:var(--panel);height:100%;min-height:0;position:relative;top:auto}.drawer-close{z-index:5;border:1px solid var(--line);background:var(--paper);cursor:pointer;place-items:center;width:36px;height:36px;padding:0;display:grid;position:absolute;top:8px;right:8px}.drawer-backdrop{z-index:80;background:var(--backdrop);cursor:pointer;border:0;display:block;position:fixed;inset:0}.mobile-panel-button{z-index:45;border:1px solid var(--accent);background:var(--accent);min-height:42px;color:var(--on-accent);font-size:var(--text-small);cursor:pointer;align-items:center;gap:8px;padding:0 14px;display:inline-flex;position:fixed;bottom:18px;right:18px}.mobile-panel-button span{color:var(--paper-deep);font-family:var(--mono);font-size:var(--text-small)}}@media (max-width:900px){.trace-workspace{grid-template-rows:152px minmax(520px,62vh) minmax(540px,68vh) 52px;grid-template-columns:minmax(0,1fr)}.trace-case-sidebar{border-right:0;border-bottom:1px solid var(--line-strong);grid-area:1/1;grid-template-rows:44px minmax(0,1fr)}.trace-case-list{display:flex;overflow:auto hidden}.trace-case-list button{min-width:154px}.trace-code-pane{grid-area:2/1}.trace-inspector{grid-area:3/1}.trace-controls{grid-area:4/1}}@media (min-width:681px) and (max-width:900px){.site-header{grid-template-columns:1fr auto}.chapter-nav{border-bottom:1px solid var(--line);background:var(--paper);display:none;position:absolute;top:100%;left:0;right:0}.chapter-nav.is-open{display:grid}.chapter-nav button{text-align:left;height:48px}.chapter-nav button:after{display:none}.menu-button{display:flex}}@media (max-width:680px){.is-source-walkthrough .file-tree button{min-height:36px}.is-source-walkthrough .source-package{display:none}.source-location{padding:8px 12px}.source-excerpt-note{font-size:12px}.site-header{grid-template-columns:1fr auto;padding:0 16px}.brand strong{font-size:16px}.trace-shell{padding:calc(var(--header-height) + 18px) 18px 40px}.trace-workspace{border-left:0;border-right:0;width:calc(100% + 36px);margin-left:-18px;margin-right:-18px}.trace-repo-workspace{grid-template-rows:52px minmax(0,1fr);grid-template-columns:1fr}.trace-file-tree{border-right:0;border-bottom:1px solid var(--line);align-items:center;gap:4px;padding:8px;display:flex;overflow:auto hidden}.trace-file-tree .tree-root{flex:none}.trace-file-tree button{grid-template-columns:15px auto;width:auto;min-width:max-content;padding:0 8px}.trace-pane-heading span{display:none}.chapter-nav{border-bottom:1px solid var(--line);background:var(--paper);opacity:0;pointer-events:none;transition:opacity .18s,transform .22s cubic-bezier(.16,1,.3,1);display:grid;position:absolute;top:100%;left:0;right:0;transform:translateY(-8px)}.chapter-nav.is-open{opacity:1;pointer-events:auto;transform:translateY(0)}.chapter-nav button{text-align:left;height:48px}.chapter-nav button:after{width:1px;height:auto;inset:0 auto 0 0;transform:scaleY(0)}.chapter-nav button.is-active:after{transform:scaleY(1)}.menu-button{display:flex}.reader-grid{padding:0 18px 72px}.site-footer{padding-inline:18px}.lesson-header{padding:40px 0 32px}.lesson-header h1{font-size:30px}.mermaid-figure{padding:16px 8px}.panel-checkpoint{margin-right:48px}.article-body{padding-top:28px}.article-body h2{margin-top:var(--article-section-gap)}.article-code{border-left:0;border-right:0;margin-left:-18px;margin-right:-18px;padding:18px}.nudge-card{grid-template-columns:1fr;gap:14px}.nudge-button{width:100%;min-width:0;max-width:none}.lesson-footer{flex-direction:column;align-items:flex-start}.map-stage{min-height:360px}.map-node{width:112px;min-height:64px;padding:10px}.map-node-tui{top:42%;left:2%}.map-node-cli{top:42%;left:27%}.map-node-agent{top:42%;left:52%}.map-node-llm,.map-node-tools{right:2%}.map-detail{grid-template-columns:84px 1fr}.repo-workspace{grid-template-rows:52px minmax(0,1fr);grid-template-columns:1fr}.file-tree{border-right:0;border-bottom:1px solid var(--line);align-items:center;gap:4px;padding:8px;display:flex;overflow:auto hidden}.empty-tree,.tree-root{flex:none;margin:0}.file-tree button{grid-template-columns:15px auto 12px;width:auto;min-width:max-content;padding:0 8px}}@media (prefers-reduced-motion:reduce){.code-scroll,html{scroll-behavior:auto}*,:after,:before{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important;animation-delay:0s!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-outline-style{syntax:"*";inherits:false;initial-value:solid}