@font-face {  font-family: 'Archivo';  font-style: normal;  font-weight: 300 900;  font-stretch: 62% 125%;  font-display: swap;  src: url(type/archivo-0.woff2) format('woff2');  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
:root{color-scheme:light;--frame:1120px;--gutter:2.5rem;--font:'Archivo',system-ui,sans-serif;--bg:#ffffff;--surface:#f5f5f4;--ink:#0d0d0d;--muted:#545454;--line:#0d0d0d;--rule:#d4d4d4;--accent:#c8341b;--tint:#fbe9e4;--band:#f5f5f4;--home-title:#0d0d0d;--focus:#1d4ed8;--on-accent:#ffffff;--danger:#b3261e}
:root[data-theme=dark]{color-scheme:dark;--bg:#121212;--surface:#1c1c1c;--ink:#f3f3f3;--muted:#ababab;--line:#8a8a8a;--rule:#3a3a3a;--accent:#ff8266;--tint:#2d1914;--band:#000000;--home-title:#ff8266;--focus:#93b4ff;--on-accent:#121212;--danger:#ff9f8f}
:root[data-theme=light]{color-scheme:light}
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.brand{font:900 2.4rem/1 var(--font);font-stretch:70%;text-decoration:none;color:var(--ink)}
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h3{font-size:1.2rem;line-height:1.3;font-weight:500;margin:1.5rem 0 .6rem}
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.skip{position:absolute;left:-10000px}.skip:focus{left:1rem;top:1rem;z-index:10;background:var(--surface);padding:1rem}
.page-index h1{max-width:18ch;color:var(--home-title)}.home{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,440px);gap:3.5rem;align-items:start}.canvas{margin:.4rem 0 0}.canvas img{display:block;width:100%;height:auto;image-rendering:pixelated;border:1px solid var(--line)}.canvas figcaption{font-size:.8rem;color:var(--muted);margin-top:.6rem;line-height:1.5}
.page-index .home .orientation>p:first-of-type{font-size:1.2rem;line-height:1.55;max-width:52ch}
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.page-index .orientation>ul li{padding:1.1rem 0;margin:0;border-bottom:1px solid var(--rule);max-width:none}
.page-index .orientation>ul li a{font-weight:500}
.page-run .orientation>ol{list-style:none;counter-reset:workflow;padding:0;margin:1.5rem 0 2rem}
.page-run .orientation>ol li{counter-increment:workflow;display:block;position:relative;padding:1.3rem 0 1.3rem 2.8rem;max-width:none;border-top:1px solid var(--rule)}
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.actions a{align-self:center}.actions button{font-size:.9rem}
.button{display:inline-block;padding:.75rem 1rem;border-radius:3px;background:var(--accent);color:var(--on-accent);text-decoration:none;font-weight:500}
.button.secondary{color:var(--accent);background:var(--tint)}
.stage-grid{list-style:none;padding:0;margin:1.5rem 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 2rem}
.stage-grid li{margin:0;padding:1.1rem 0;border-top:1px solid var(--rule);min-width:0}.stage-grid p{font-size:.9rem;color:var(--muted);margin:.45rem 0 0}
.stage-grid strong{display:inline-block;min-width:2.4rem}
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.notice{overflow-wrap:anywhere;padding:1rem 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);font-size:.9rem;color:var(--muted);max-width:none}.notice+.checkpoint,.notice+details{border-top:0}
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.stage-picker{border-top:1px solid var(--rule);padding-top:1.2rem;margin-top:2rem}.stage-picker label{display:block;font-weight:500;margin-bottom:.5rem}.stage-picker>div{display:flex;gap:.75rem;flex-wrap:wrap}.stage-picker select{flex:1;min-width:220px}.stage-picker button{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.catalogue-nav{display:flex;align-items:center;flex-wrap:wrap;gap:.8rem;margin:1.4rem 0;padding:.8rem 0;border-top:1px solid var(--rule)}.catalogue-nav a{margin-left:auto}.local-launch{margin:1.2rem 0;border-left:3px solid var(--accent);padding-left:1rem}.local-launch h4{margin:.5rem 0;font-size:1.05rem}.local-launch p{font-size:.9rem}.record-copy{overflow-wrap:anywhere}
#catalogue{margin-top:2.3rem}#catalogue-status{font-size:.8rem;color:var(--muted)}
#checkpoint-list{display:block}.checkpoint{border-top:1px solid var(--rule);padding:1.6rem 0 .4rem;min-width:0}.checkpoint h3{margin:0 0 .6rem}.checkpoint .actions{margin:.9rem 0 .4rem}.checkpoint details{margin-top:.8rem}.checkpoint details:last-of-type{border-bottom:0}.checkpoint .why{color:var(--muted);font-size:.9rem}
.checkpoint p{overflow-wrap:anywhere}
.checkpoint>p:not(.why){font-size:.8rem;color:var(--muted)}
details{border-top:1px solid var(--rule);padding:.8rem 0}details:last-of-type{border-bottom:1px solid var(--rule)}summary{cursor:pointer;font-weight:500;list-style:none;display:flex;align-items:baseline;gap:.7rem}summary::-webkit-details-marker{display:none}summary::before{content:'';flex:none;width:.42em;height:.42em;border:solid currentColor;border-width:0 1.5px 1.5px 0;transform:translateY(-.15em) rotate(-45deg);color:var(--accent)}details[open]>summary::before{transform:translateY(-.3em) rotate(45deg)}details>*:not(summary){margin-left:1.15rem}
code,pre{font:.84rem/1.6 ui-monospace,monospace;overflow-wrap:anywhere}pre{padding:1rem 1.1rem;background:var(--surface);border-left:3px solid var(--line);overflow:auto;white-space:pre-wrap}pre+button,details pre+button{font-size:.8rem;padding:.4rem .75rem;border-color:var(--rule);margin-top:-.3rem}
dl{display:grid;grid-template-columns:minmax(110px,1fr) 3fr;gap:.5rem;font-size:.9rem}dt{font-weight:500}dd{margin:0;overflow-wrap:anywhere}
table{display:block;overflow:auto;border-collapse:collapse;font-size:.9rem;font-variant-numeric:tabular-nums}td,th{padding:.7rem;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}th{font-weight:600;border-bottom:2px solid var(--line)}
blockquote{border-left:1px solid var(--rule);padding-left:1rem;margin-left:0;color:var(--muted)}
.deeper{border-top:1px solid var(--rule);padding-top:1.2rem;margin-top:2.3rem;font-size:.9rem;max-width:none}details+.deeper{margin-top:0}
.stage-explanation{max-width:72ch}
.stage-explanation>h1+p{font-size:1.15rem;line-height:1.6}
.stage-output>summary{display:grid;grid-template-columns:.5em minmax(0,1fr);column-gap:.7rem;row-gap:.2rem;padding:.35rem 0}
.stage-output>summary::before{grid-column:1;grid-row:1;align-self:center}
.stage-output .output-purpose{grid-column:2;font-weight:600}
.stage-output .output-filenames{grid-column:2;color:var(--muted);font-weight:400;line-height:1.65;overflow-wrap:anywhere}
.stage-output .output-filenames code{font-size:.84rem}
.stage-output .output-description{margin-top:.6rem;margin-bottom:.6rem}
.stage-reference{border-top:2px solid var(--line);margin-top:3.5rem;padding-top:.4rem}
.stage-reference h2{font-size:clamp(1.9rem,4vw,2.4rem);margin-top:1.3rem}
.stage-reference h2 a{text-decoration-thickness:2px;text-underline-offset:.15em}
.stage-navigation{display:grid;grid-template-columns:1fr 1fr 1fr;gap:.7rem;max-width:72ch;margin:1.5rem 0 2rem;align-items:stretch}
.stage-navigation a{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:64px;padding:.6rem .4rem;border:1px solid var(--rule);text-align:center;text-decoration:none;line-height:1.4}
.stage-navigation a:hover{border-color:var(--accent);background:var(--tint)}
.stage-navigation span{font-size:.8rem}.stage-navigation strong{font-size:1rem}.stage-navigation .stage-all{font-size:.9rem}
.stage-agent-key{max-width:72ch;border-top:1px solid var(--rule);padding-top:1.2rem;color:var(--muted)}
.stage-agent-key h2{font-size:1rem;font-stretch:100%;font-weight:600;line-height:1.4;margin:0 0 .6rem}
.stage-agent-key p{font-size:.88rem;line-height:1.6;max-width:none;margin:.6rem 0}
.reference-topics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2rem}.reference-topics h2{font-size:1.55rem}.reference-topics ul{list-style:none;padding:0}.reference-topics li{font-size:.9rem}
#reference-search{display:block;width:min(100%,600px);margin-top:.5rem}#reference-count{font-size:.8rem;color:var(--muted)}
.reference-index{list-style:none;padding:0;columns:2;column-gap:2rem}.reference-index li{break-inside:avoid;padding:.75rem 0;border-top:1px solid var(--rule);margin:0}.reference-index a{font-size:.9rem}.reference-index small{display:block;font-size:.8rem;overflow-wrap:anywhere;margin-top:.25rem}
[hidden]{display:none!important}.message{padding:1rem;margin:.6rem 0;border-radius:3px;background:var(--tint);white-space:pre-wrap}.message.user{background:var(--surface)}
.message .markdown{white-space:normal;overflow-wrap:anywhere}.message .markdown h2,.message .markdown h3,.message .markdown h4,.message .markdown h5,.message .markdown h6{font:600 1.05rem/1.4 var(--font);letter-spacing:normal;margin:1.4rem 0 .6rem}.message .markdown p{margin:.75rem 0}.message .markdown pre{white-space:pre-wrap}.message .markdown>:last-child{margin-bottom:0}
.error{color:var(--danger);padding:1rem 0}#interview-form textarea{width:100%;min-height:110px}#interview-log{min-height:150px}small{color:var(--muted)}

/* Wayfinding: plain mixed-case menu, matching arrieta.science; the current page carries a 2px underline. */
header nav a{font-weight:400;font-size:.95rem;color:var(--ink)}
header nav a[aria-current]{border-bottom-width:2px}
.page-run .orientation>ol li::before{font-weight:800;font-stretch:68%;font-size:1.9rem;top:1.05rem}

/* One menu of what visitors come to see; task routes and the theme sit in a small utility row beside the name. */
header .utility{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:.5rem 1.4rem}
header .task-nav{display:flex;flex-wrap:wrap;gap:.2rem 1.2rem}
header .task-nav a{font-size:.85rem;color:var(--muted)}
header .task-nav a[aria-current]{color:var(--ink)}
.kicker{font-size:.8rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);margin:0 0 .7rem}

/* Home: the two worked examples sit under the introduction, beside the canvas. */
.home{grid-template-areas:"intro canvas" "examples canvas";row-gap:.5rem}.home>.orientation{grid-area:intro}.home>.canvas{grid-area:canvas}.home>.examples{grid-area:examples}
.examples{display:grid;grid-template-columns:1fr 1fr;gap:1rem;align-content:start}
.examples>a{display:block;padding:1rem 1rem 1.15rem;border:2px solid var(--line);color:var(--ink);text-decoration:none}
.examples>a:hover{background:var(--tint);border-color:var(--accent)}
.examples span{display:block;font-size:.8rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);margin-bottom:.45rem}
.examples strong{display:block;font:750 1.3rem/1.3 var(--font);font-stretch:75%}
.examples p{grid-column:1/-1;margin:.1rem 0 0;font-size:.9rem}
.principles{max-width:76ch;margin-top:1.5rem}
.principles>h2{border-top:1px solid var(--rule);padding-top:1.4rem}

/* Cross-field comparison: one semantic table, scrollable by touch or keyboard. */
.model-comparison{max-width:100%;overflow-x:auto;margin:1.5rem 0;scrollbar-color:var(--line) var(--bg)}
.model-comparison:focus-visible{outline:3px solid var(--focus);outline-offset:4px}
.model-comparison table{display:table;width:100%;min-width:60rem;table-layout:fixed}
.model-comparison caption{text-align:left;font-weight:600;margin-bottom:.7rem}
.model-comparison th:first-child,.model-comparison td:first-child{width:15%}

/* Reading levels. Overview: the large headline above. Guide: one step smaller. Full reference: document scale. */
main[data-layer="Guide"] h1,main[data-layer="Stage guide"] h1{font-size:clamp(2.3rem,5.5vw,3.6rem)}
main[data-layer="Full reference"] h1{font-size:clamp(2rem,4.5vw,3rem);line-height:1.02}
main[data-layer="Full reference"]>.notice:first-of-type{border-top:2px solid var(--line);margin-bottom:1.8rem}

/* Agent pages: spec sheet. Expanded headline, numbered sections with mono labels in a left column. */
main.page-agents{counter-reset:spec}
.page-agents h1{font-weight:700;font-stretch:112%;font-size:clamp(1.9rem,4.2vw,2.8rem);letter-spacing:-.02em;line-height:1.05;max-width:24ch}
.page-agents .breadcrumbs,.page-agents .spec>h2{font-family:ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace}
.page-agents .breadcrumbs{text-transform:uppercase;letter-spacing:.05em;font-size:.8rem}
.spec{display:grid;grid-template-columns:minmax(140px,200px) minmax(0,1fr);column-gap:2.5rem;border-top:2px solid var(--line);padding:1.1rem 0 1.4rem;margin:0}
.spec>*{grid-column:2}.spec>:nth-child(2){margin-top:0}
.spec>h2{grid-column:1;grid-row:1/span 40;margin:0;font-size:.8rem;font-weight:600;line-height:1.45;letter-spacing:.06em;text-transform:uppercase;font-stretch:100%}
.spec>h2::before{counter-increment:spec;content:counter(spec,decimal-leading-zero);display:block;color:var(--accent);font-size:1.1rem;letter-spacing:0;margin-bottom:.35rem}

.page-agents p code,.page-agents li code{background:var(--surface);border:1px solid var(--rule);border-radius:2px;padding:.05rem .3rem;font-size:.8rem;overflow-wrap:break-word}

/* Media queries: always last. */
@media(max-width:860px){.home{grid-template-columns:minmax(0,1fr);grid-template-areas:none;gap:0}.home>.orientation,.home>.canvas,.home>.examples{grid-area:auto}.home>.orientation{display:contents}.home>.orientation>*{order:2}.home>.orientation>h1{order:0}.home>.canvas{order:1;margin:0 0 1.2rem}.home>.examples{order:3;margin-top:1rem}}
@media(max-width:680px){:root{--gutter:1.2rem}body{font-size:16px}header{padding:1.4rem var(--gutter) 0}main{padding:2rem var(--gutter) 3rem}header nav{gap:.5rem 1.3rem}header .task-nav{column-gap:1rem}header .task-nav a{font-size:.8rem}.stage-grid,.filters,.reference-topics{grid-template-columns:1fr}.reference-topics{gap:0}.brand span{font-size:.8rem}#theme{font-size:.8rem}.actions>*{max-width:100%}.stage-picker>div{display:block}.stage-picker select{width:100%;min-width:0}.stage-picker button{margin-top:.7rem}.reference-index{columns:1}dl{grid-template-columns:1fr}dd{margin-bottom:.5rem}footer{padding:1.2rem var(--gutter) 1.6rem}.page-index h1{font-size:2.65rem}.breadcrumbs{margin-top:0}pre{font-size:.8rem}}
@media(pointer:coarse){button,select,summary{min-height:44px}header nav a{padding:.6rem 0}}
@media(prefers-reduced-motion:no-preference){a,button{transition:background-color .12s ease,color .12s ease}}
@media(max-width:680px){header{grid-template-columns:minmax(0,1fr) auto}header .utility{display:contents}header #theme{grid-column:2;grid-row:1}header .task-nav{grid-column:1/-1;margin-top:.9rem;gap:.2rem 1.1rem}header .menu{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;white-space:nowrap;gap:1.3rem;padding:1rem 0 .5rem;mask-image:linear-gradient(90deg,#000 88%,transparent)}header .menu::-webkit-scrollbar{display:none}.examples{grid-template-columns:1fr}}
@media(max-width:680px){.spec{grid-template-columns:1fr}.spec>h2{grid-row:auto;margin-bottom:.8rem}.spec>*{grid-column:1}}
/* One stage map shared by explanation and interview selection. */
.stage-map{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem 2rem;margin:2rem 0}
.stage-group{min-width:0}.stage-group h3{font-weight:750;margin:0 0 .5rem}
.stage-map .stage-grid{display:block;margin:0}.stage-map .stage-grid li{padding:0}
.stage-map .stage-grid a{display:flex;align-items:baseline;gap:.5rem;padding:.65rem .2rem;text-decoration:none;min-height:44px}
.stage-map a:hover,.community-grid a:hover{background:var(--surface);text-decoration:underline}
.stage-map a[aria-current="true"],.community-grid a[aria-current="true"]{background:var(--tint);color:var(--ink);font-weight:650}
.interview-kinds{display:flex;gap:1.5rem;flex-wrap:wrap;border-bottom:1px solid var(--rule);margin:1rem 0 2rem}
.interview-kinds a{padding:.6rem 0;text-decoration:none}.interview-kinds a[aria-current="true"]{border-bottom:2px solid var(--ink);font-weight:650}
.community-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));list-style:none;gap:0 1.5rem;padding:0}.community-grid li{min-width:0;border-top:1px solid var(--rule)}.community-grid a{display:block;padding:.7rem 0;overflow-wrap:anywhere}
.talk-action{display:inline-block;padding:.65rem 1rem;background:var(--accent);color:var(--on-accent);font-weight:650;text-decoration:none;min-height:44px}.talk-action:hover{background:var(--ink);color:var(--bg)}
.checkpoint-evidence{font-size:.9rem}.checkpoint-evidence>summary{font-weight:400}.checkpoint-evidence .actions a{font-size:.9rem}.checkpoint-date{margin:.35rem 0}
#selection-title:focus{outline-offset:.3rem}.catalogue-more{margin-top:2rem}#all-checkpoints{width:auto;accent-color:var(--accent);margin-right:.5rem}
#checkpoint-results{scroll-margin-top:1.5rem}.interview-checkpoints{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.interview-checkpoints article{border-top:1px solid var(--rule);padding-top:1rem}.interview-checkpoints button{display:block;margin:.75rem 0}
@media(max-width:860px){.stage-map,.community-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.stage-map{grid-template-columns:1fr;gap:1.5rem}.community-grid,.interview-checkpoints{grid-template-columns:1fr}.stage-map .stage-grid a{padding:.8rem 0}}


/* Interview routes use the same reading surface and action rows. */
.close-confirmation { margin-block: 1rem; padding-block: 1rem; border-block: 1px solid var(--rule); }
.close-confirmation button + button { margin-inline-start: .7rem; }
.interview-retention { font-size: .9rem; }
[data-chat-route] pre { white-space: pre-wrap; overflow-wrap: anywhere; }
[data-chat-route] .checkpoint h2 { font-size: 1.35rem; }

.actions .talk-local { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.actions .talk-local:hover,.actions .talk-local[aria-expanded="true"] { background: var(--tint); }
.actions button.talk-local { font-size: inherit; font-weight: 650; border-radius: 0; }
.local-setup { margin: 1.5rem 0; padding: 1.3rem 0; border-block: 1px solid var(--rule); }
.local-setup h3 { font-size: 1.35rem; margin: 0 0 .7rem; }
.local-setup h4 { font-size: 1.1rem; margin: 2rem 0 1rem; }
.local-setup-steps { max-width: 72ch; padding-left: 1.4rem; }
.local-setup-steps li { margin: 1.3rem 0; }
.local-setup-steps li>p:first-child { margin-bottom: .6rem; }

/* Stage introductions share the same chat row as the full stage guides. */
#checkpoint-list>.checkpoint-stage{border-top:0;padding-top:0}
#stage-description{max-width:72ch}
#checkpoint-results>.catalogue-more{margin-top:1rem}
.chat-actions{align-items:stretch}