@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Inter:wght@400;500;600;650;700;750;800&display=swap');
:root{--bg:#f0f5f4;--surface:#fff;--ink:#12343b;--text:#4c6266;--line:#cedbd9;--accent:#ae3c18;--soft:#f7eae2;--green:#28775f;--green-bg:#edf5ee;--purple:#71639a;--blue:#39769c;--shadow:0 12px 35px #143d3b08;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.65 Inter,system-ui,sans-serif}button,a,input,select{-webkit-tap-highlight-color:transparent}a{color:var(--accent);text-underline-offset:4px}button,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button{color:var(--ink)}h1,h2,h3,h4,strong{color:var(--ink)}h1,h2,h3,h4,p{margin:0}header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 94%,transparent);backdrop-filter:blur(14px)}nav{max-width:1240px;margin:auto;display:flex;align-items:center;gap:30px;padding:18px 28px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:11px;letter-spacing:.09em;font-weight:800;text-decoration:none;color:var(--ink);white-space:nowrap}.brand-icon{width:29px;height:29px;display:grid;place-items:center;background:var(--ink);color:var(--surface);font:700 20px Inter;border-radius:7px;position:relative}.brand-icon>span{position:absolute;right:-4px;top:-6px;font-size:17px;color:var(--accent)}.navlinks{display:flex;gap:23px;margin-left:auto}.navlinks a{color:var(--text);font-size:12px;text-decoration:none;font-weight:600}.navlinks a:hover,.navlinks a.active{color:var(--accent)}.theme{display:flex;gap:7px;align-items:center;border:1px solid var(--line);border-radius:7px;background:var(--surface);padding:6px 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left}.connections{position:absolute;inset:0;width:100%;height:100%;color:#90a6a2}.connections text{font:10px Inter;fill:var(--text);stroke:none}.connections path{vector-effect:non-scaling-stroke}#nodes{position:absolute;inset:0;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:155px 155px;column-gap:35px;row-gap:55px}.node{margin:0 5px;position:relative;min-width:0;text-align:left;background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--node-color,var(--ink));border-radius:8px;padding:21px 17px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:7px;transition:border-color .15s,background .15s,box-shadow .15s}.node::before{content:attr(data-number);position:absolute;top:-12px;left:15px;width:24px;height:24px;border-radius:50%;background:var(--node-color,var(--ink));color:#fff;font-size:11px;display:grid;place-items:center;border:3px solid var(--surface)}.node strong{font-size:15px;line-height:1.2}.node 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var(--line);background:var(--surface);border-radius:9px;overflow:hidden;margin-bottom:18px}.sim-left{padding:30px;border-right:1px solid var(--line)}.terminal-label{font-size:9px}.request{font-size:19px;line-height:1.6;color:var(--ink);letter-spacing:-.025em;margin:22px 0}.sim-code{background:#14383c;color:#e5f1ed;padding:16px;border-radius:6px;margin-bottom:24px;overflow:auto}.sim-code span{display:block;font:8px 'IBM Plex Mono';color:#b5d3c8;margin-bottom:10px}.sim-code code{font:12px 'IBM Plex Mono',monospace;white-space:nowrap}.sim-left select{width:100%;background:var(--surface);border:1px solid var(--line);border-radius:5px;padding:9px;color:var(--ink);font-size:12px}.sim-actions{display:flex;gap:15px;align-items:center;margin-top:20px;flex-wrap:wrap}.text-button{border:0;background:none;font-size:12px;text-decoration:underline;text-underline-offset:4px;padding:8px 0}.sim-right{padding:30px;display:flex;flex-direction:column;min-height:350px}.sim-state{display:flex;justify-content:space-between;gap:15px;align-items:center}.sim-state .label{margin:0}.timeline{list-style:none;padding:0;margin:24px 0 15px;flex:1;min-height:175px}.timeline li{font-size:12px;position:relative;padding:0 0 15px 22px;border-left:1px solid var(--line);margin-left:4px;line-height:1.6}.timeline li:before{content:'';position:absolute;top:4px;left:-4px;background:var(--green);width:7px;height:7px;border-radius:50%}.timeline li.stop:before{background:var(--accent)}.timeline li:last-child{border:0}.timeline li span{display:block;font:9px 'IBM Plex Mono',monospace;color:var(--text);opacity:.8}.sim-summary{display:grid;grid-template-columns:1fr 1fr;padding-top:18px;border-top:1px solid var(--line)}.sim-summary strong{font:26px 'IBM Plex Mono';display:block}.sim-summary span{font-size:10px}#human-actions{padding-top:20px;font-size:12px}#human-actions p{margin-bottom:12px}.approve,.reject{border:1px solid var(--line);padding:7px 15px;border-radius:5px;background:var(--surface);margin-right:6px;font-size:12px}.approve{background:var(--green);color:#fff;border-color:var(--green)}.reject{color:var(--accent)}.controls-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:25px;margin:30px 0}.controls-grid article{padding-top:18px;border-top:2px solid var(--line)}.control-index{font:11px 'IBM Plex Mono';color:var(--accent)}h3{font-size:18px;letter-spacing:-.03em}.controls-grid h3{margin:13px 0;line-height:1.4;font-size:16px}.controls-grid p{font-size:12px}.controls-grid code{display:block;font:9px 'IBM Plex Mono';margin-top:17px;color:var(--ink)}details{border:1px solid var(--line);border-radius:6px;padding:15px 18px;font-size:12px}summary{cursor:pointer;color:var(--ink);font-weight:600;list-style:none;display:flex;justify-content:space-between}summary::-webkit-details-marker{display:none}summary span{font-size:17px}details[open] p{padding-top:15px;max-width:900px}.table-scroll{overflow:auto;margin:20px 0}table{width:100%;border-collapse:collapse;min-width:750px;font-size:12px}th{font:9px 'IBM Plex Mono';text-align:left;color:var(--text);letter-spacing:.07em;padding:13px 15px;border-bottom:2px solid var(--ink)}td{padding:18px 15px;border-bottom:1px solid var(--line);vertical-align:top}td:nth-child(1){width:27%}td:nth-child(2){width:19%}td:nth-child(3){width:40%}td small{display:block;font-size:10px;margin-top:5px}td .pill{display:inline-block;font-size:10px;background:var(--green-bg);color:var(--green);border-radius:4px;padding:2px 7px;margin-bottom:5px;font-weight:600}td a{white-space:nowrap;font-size:11px}.evidence-note{padding:18px 20px;border:1px solid var(--line);border-radius:7px;font-size:12px;background:color-mix(in srgb,var(--surface) 50%,var(--bg))}.evidence-note p{margin-top:6px}.decision-layout{display:grid;grid-template-columns:.85fr 1.4fr;gap:55px;margin-top:28px}.decision-statement{border:1px solid var(--line);padding:28px;border-radius:8px;background:var(--surface)}.decision-statement h3{font-size:27px;line-height:1.3;margin:16px 0}.decision-statement p{font-size:12px;margin-bottom:22px}.tag{display:inline-block;margin-right:3px;margin-bottom:5px}.decision-row{border-bottom:1px solid var(--line);padding:0 0 20px;margin-bottom:20px}.decision-row h4{font-size:14px;margin-bottom:8px}.decision-row p{font-size:12px}.cost-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px}.cost-card,.budget-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:28px}.cost-total{font-size:43px;color:var(--ink);font-weight:750;letter-spacing:-.06em;margin:15px 0 24px}.cost-total>span{font-size:15px;letter-spacing:0}.cost-bar{display:flex;height:12px;gap:3px;overflow:hidden;border-radius:4px;margin-bottom:18px}.cost-bar span:nth-child(1){background:var(--ink)}.cost-bar span:nth-child(2){background:var(--accent)}.cost-bar span:nth-child(3){background:#759b91}.cost-rows>div{display:flex;justify-content:space-between;padding:8px 0;font-size:11px;border-bottom:1px solid var(--line)}.muted{font-size:10px;margin-top:16px}.budget-card h3{margin:15px 0 25px}.budget-card label{display:flex;justify-content:space-between;font-size:12px}.budget-card input{width:100%;accent-color:var(--accent);margin:20px 0}.budget-card dl{margin:0}.budget-card dl>div{display:flex;justify-content:space-between;gap:15px;font-size:11px;margin-bottom:9px}.budget-card dd{margin:0;white-space:nowrap;color:var(--ink)}.budget-result{border:1px solid var(--line);padding:12px;border-radius:5px;font-size:12px;margin-top:20px;color:var(--green);background:var(--green-bg)}.budget-result.blocked{color:var(--accent);background:var(--soft)}.recovery{border-top:1px solid var(--line);padding-top:22px;margin-top:28px;font-size:12px;max-width:1000px}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px;align-items:center;margin:55px 0 0;padding:30px 0 35px}footer p{font-size:10px}footer>a:last-child{font-size:11px;text-decoration:none}
[data-theme=dark]{--bg:#122327;--surface:#1a3034;--ink:#e0eeea;--text:#b2c5c4;--line:#365051;--accent:#ef9870;--soft:#3d2b26;--green:#89cdb0;--green-bg:#223c33;--purple:#b8a0da;--blue:#8ab8d4;color-scheme:dark}[data-theme=dark] .primary{background:#dcece6;color:#183530}[data-theme=dark] .node{--node-color:var(--ink)}[data-theme=dark] .approve{background:#326d57}[data-theme=dark] .cost-bar span:first-child{background:#a3c8b9}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#122327;--surface:#1a3034;--ink:#e0eeea;--text:#b2c5c4;--line:#365051;--accent:#ef9870;--soft:#3d2b26;--green:#89cdb0;--green-bg:#223c33;--purple:#b8a0da;--blue:#8ab8d4;color-scheme:dark}}
@media(max-width:1020px){nav{gap:15px}.navlinks{gap:14px}.brand{font-size:9px}.controls-grid{grid-template-columns:repeat(2,1fr)}.stats strong{font-size:18px}.stats>div{padding:17px}.component-grid{gap:22px}.hero{padding-top:45px}.section-top{align-items:flex-start}}
@media(max-width:760px){nav{padding:13px 20px;flex-wrap:wrap;gap:13px}.theme{margin-left:auto}.navlinks{order:3;width:100%;margin:0;gap:21px;overflow:auto;scrollbar-width:none;padding:3px 0}.navlinks a{font-size:11px;white-space:nowrap}main{padding:0 20px}.hero{padding-top:32px}h1{font-size:42px;letter-spacing:-.055em}.intro{font-size:14px}.hero-bottom{align-items:flex-start;flex-direction:column;gap:15px}.micro{font-size:8px}.stats{grid-template-columns:repeat(2,1fr)}.stats>div{padding:16px;min-height:90px}.stats>div:nth-child(2){border-right:0}.stats>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.stats strong{font-size:17px}.stats span{font-size:9px}.section-top{display:block}.section-top>.badge{margin-bottom:12px}h2{font-size:26px}.section-intro{font-size:13px}.diagram-toolbar{font-size:8px;padding:10px}.diagram-scroll{padding:20px 10px}.diagram-legend{gap:10px;font-size:9px;padding:10px}.component-grid{grid-template-columns:1fr;gap:0}.component-heading h3{font-size:18px}.component-heading .eyebrow{font-size:8px}.step-controls{gap:8px}.step-controls button{padding:5px 7px}.component-heading{gap:10px}.big-number{font-size:27px}.simulator{grid-template-columns:1fr}.sim-left{border-right:0;border-bottom:1px solid var(--line);padding:24px}.sim-right{padding:24px;min-height:325px}.request{font-size:18px}.controls-grid{gap:22px 20px}.controls-grid h3{font-size:15px}.controls-grid p{font-size:11px}.controls-grid code{font-size:8px}.decision-layout{grid-template-columns:1fr;gap:25px}.cost-grid{grid-template-columns:1fr}.cost-card,.budget-card{padding:23px}.cost-total{font-size:38px}footer{align-items:flex-start;flex-direction:column;gap:17px}section+section{margin-top:32px;padding-top:32px}.eyebrow{font-size:9px}html{scroll-padding-top:125px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Sequence diagram: all content stays visible without a JS renderer or CDN. */
.entry-points{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin:24px 0}.entry-points>div{padding:18px 20px;border:1px solid var(--line);border-radius:7px;background:var(--surface)}.entry-points strong{font-size:14px}.entry-points p{font-size:12px;margin-top:8px}.sequence-shell{border:1px solid var(--line);border-radius:9px;background:var(--surface);overflow:hidden}.sequence-shell .diagram-toolbar a{font:10px Inter;text-decoration:none;letter-spacing:0}.sequence-scroll{overflow:auto;padding:14px 8px 0;scrollbar-width:thin}.sequence-svg{display:block;width:100%;min-width:900px;height:auto;color:var(--ink)}.sequence-participant{fill:var(--bg);stroke:var(--line);stroke-width:1.2}.sequence-lifeline{stroke:var(--line);stroke-width:1;stroke-dasharray:5 6}.sequence-lane-name{text-anchor:middle;fill:var(--ink);font:600 13px Inter,system-ui,sans-serif}.sequence-lane-sub{text-anchor:middle;fill:var(--text);font:10px Inter,system-ui,sans-serif}.sequence-arrow{stroke:var(--text);stroke-width:1.4}.sequence-label-bg{fill:var(--surface)}.sequence-message-text{text-anchor:middle;fill:var(--text);font:11px Inter,system-ui,sans-serif}.sequence-message.selected .sequence-arrow{stroke:var(--accent);stroke-width:2.5}.sequence-message.selected .sequence-message-text{fill:var(--accent);font-weight:700}.sequence-message.selected .sequence-label-bg{fill:var(--soft)}.sequence-human-band{fill:var(--soft);opacity:.45}.sequence-band-label{text-anchor:end;fill:var(--accent);font:8px 'IBM Plex Mono',monospace;letter-spacing:.06em}.sequence-guide{display:flex;gap:25px;align-items:center;padding:22px 0}.sequence-guide h3{font-size:17px;margin-bottom:8px}.sequence-guide p{max-width:850px;font-size:12px}.sequence-guide .step-controls{flex-shrink:0}.sequence-mobile-hint{display:none}.navlinks{gap:17px}
@media(max-width:1020px){nav{gap:12px}.navlinks{gap:11px}.navlinks a{font-size:11px}}
@media(max-width:760px){.entry-points{grid-template-columns:1fr;gap:10px}.entry-points>div{padding:16px}.sequence-guide{align-items:flex-start;flex-direction:column;gap:15px}.sequence-guide .step-controls{margin-left:0}.sequence-mobile-hint{display:block;font-size:10px;padding:10px 12px 0}.sequence-shell .diagram-toolbar{gap:10px}.sequence-shell .diagram-toolbar a{font-size:9px}.navlinks{gap:21px}}