.article-shell{max-width:1120px;font-family:var(--font-sans);color:var(--ink);margin:auto;padding:0 clamp(20px,4vw,56px);font-size:18px;line-height:1.85}.masthead{border-bottom:1px solid var(--line);color:var(--ink-soft);justify-content:space-between;gap:20px;padding:25px 0;font-size:13px;display:flex}.masthead a{color:var(--green);font-size:18px;font-weight:650;text-decoration:none}.intro{max-width:850px;padding:74px 0 24px}.eyebrow,.small-label{letter-spacing:.06em;color:var(--green);margin:0 0 12px;font-size:13px;font-weight:650}.intro h1{font-family:var(--font-display);letter-spacing:-.025em;margin:0 0 28px;font-size:clamp(32px,4.2vw,51px);font-weight:600;line-height:1.4}.lede{font-size:23px;line-height:1.8}.meta,.caption,.article-shell figcaption{color:var(--ink-soft);font-size:14px;line-height:1.7}.meta{margin-top:28px}.review-note{border-left:3px solid var(--copper);background:var(--paper);padding:14px 20px;font-size:15px}.contents{flex-wrap:wrap;gap:12px 28px;padding:24px 0;font-size:15px;display:flex}.contents a{text-underline-offset:5px;text-decoration-thickness:1px}.unit{border-top:1px solid var(--line);margin-top:30px;padding:65px 0 20px;scroll-margin-top:24px}.article-shell h2{font-family:var(--font-display);margin:0 0 24px;font-size:clamp(29px,3.2vw,38px);font-weight:600;line-height:1.5}.article-shell h3{margin:0 0 16px;font-size:23px;line-height:1.6}.article-shell p{margin:0 0 20px}.section-lede{max-width:820px;font-size:20px}.data-warning{color:var(--copper);border-bottom:1px solid var(--line);padding:0 0 25px;font-size:15px}.scene{padding:35px 0}.scene+.scene{border-top:1px solid var(--line)}.scene-heading{align-items:flex-start;gap:20px;display:flex}.scene-num{font-family:var(--font-display);color:var(--copper);font-size:38px;line-height:1.3}.scene-heading .eyebrow{margin-bottom:4px}.transaction-strip{grid-template-columns:repeat(3,1fr);gap:20px;margin:28px 0;display:grid}.transaction{border-top:2px solid var(--green);background:var(--paper);flex-direction:column;padding:18px;display:flex}.transaction strong{color:var(--green);font-size:30px}.transaction small,.transaction span{color:var(--ink-soft);font-size:14px}.network-layout{grid-template-columns:1.3fr 1fr;align-items:center;gap:35px;display:grid}.network{margin:0}.network svg{width:100%;height:auto;display:block}.network line{stroke:var(--green);stroke-width:2px}.network g[data-edge]{color:var(--green)}.network text{font:17px var(--font-sans);fill:var(--ink-soft)}.network circle{fill:var(--paper);stroke:var(--green);stroke-width:2px}.network .account{fill:var(--green);font-size:24px;font-weight:650}.network .center-label{fill:var(--ink);font-size:21px;font-weight:650}.network .selected{color:var(--copper)}.network .selected line{stroke:var(--copper);stroke-width:5px}.network .selected text{fill:var(--copper);font-weight:700}.record-buttons{gap:8px;display:grid}.record-buttons button{font:inherit;border:1px solid var(--line);background:var(--paper);cursor:pointer;border-radius:4px;justify-content:space-between;min-height:46px;padding:10px 16px;font-size:16px;display:flex}.record-buttons button[aria-pressed=true]{border-color:var(--copper);box-shadow:inset 3px 0 var(--copper);background:#f1e4d6}.network-records .caption{margin-top:16px}.selection-status{min-height:48px;color:var(--green);font-size:14px}.takeaway{border-left:3px solid var(--green);max-width:850px;margin:32px 0 12px;padding:12px 22px}.takeaway strong{color:var(--green)}.article-shell blockquote{font-size:27px;font-family:var(--font-display);color:var(--green);margin:25px 0;line-height:1.7}.answer{background:var(--paper);border-top:2px solid var(--green);margin:25px 0;padding:28px 32px}.answer p:last-child{margin-bottom:0}.article-shell details{border-bottom:1px solid var(--line);padding:16px 0;scroll-margin-top:24px}.article-shell summary{cursor:pointer;min-height:44px;color:var(--green);font-weight:600}.article-shell details p{margin-top:16px}.article-shell details a{font-size:14px}.evidence{font-size:16px}.responsibilities{grid-template-columns:repeat(3,1fr);gap:24px;margin:35px 0;padding:0;list-style:none;display:grid}.responsibilities li{border-top:1px solid var(--line);padding-top:16px}.responsibilities strong,.responsibilities span{display:block}.responsibilities span{color:var(--ink-soft);margin-top:10px;font-size:16px}.source-note,.representation{border-top:1px solid var(--line);color:var(--ink-soft);padding:25px 0 0;font-size:16px}.source-note h3,.representation h3{color:var(--ink);font-size:19px}.position-figure{margin:38px 0}.axis-y,.axis-x{color:var(--ink-soft);justify-content:space-between;margin:10px 0;font-size:14px;display:flex}.axis-y{justify-content:space-between}.task-map{border:1px solid var(--line-strong);background:linear-gradient(to right,transparent calc(50% - .5px),var(--line-strong) 50%,transparent calc(50% + .5px)),linear-gradient(to bottom,transparent calc(50% - .5px),var(--line-strong) 50%,transparent calc(50% + .5px)),var(--paper);height:420px;position:relative}.quadrant{color:var(--ink-faint);padding:12px;font-size:13px;position:absolute}.q1{top:0;left:0}.q2{top:0;right:0}.q3{bottom:0;left:0}.q4{bottom:0;right:0}.tech-node{overflow-wrap:normal;width:max-content;left:var(--x);top:var(--y);background:var(--paper);border:1px solid var(--green);min-height:44px;color:var(--green);text-align:center;border-radius:4px;max-width:44%;padding:8px 12px;font-size:16px;font-weight:600;line-height:1.4;text-decoration:none;position:absolute;transform:translate(-50%,-50%)}.tech-node:hover{background:var(--green-tint)}.range{border:1px dashed var(--line-strong);pointer-events:none;border-radius:38%;position:absolute}.range-context{background:#dfe6dc44;width:60%;height:36%;top:8%;left:8%}.range-rag{width:70%;height:33%;top:20%;left:23%}.range-graph{background:#dfe6dc44;width:47%;height:49%;top:38%;left:47%}.range-sql{width:78%;height:33%;top:58%;left:10%}.tech-details summary span{color:var(--ink-soft);margin-left:20px;font-size:15px;font-weight:400}.tech-details p{max-width:850px}.representation{margin-top:35px}.history-figure{margin:36px 0}.lane-headings,.history-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;display:grid}.lane-headings{color:var(--green);margin:30px 0 0;font-size:16px}.lane-headings strong{border-top:3px solid var(--green);padding:16px 0}.era{border-top:1px solid var(--line);padding:22px 0}.era-label{color:var(--ink-soft);justify-content:space-between;gap:20px;margin-bottom:18px;font-size:14px;display:flex}.era-label span{font-size:13px}.history-node{border-left:2px solid var(--line-strong);background:var(--paper);border-bottom:0;align-self:start;padding:18px;font-size:15px;position:relative}.history-node:after{content:"↓";color:var(--green);font-size:21px;position:absolute;bottom:-33px;left:48%}.history-row{margin-bottom:28px}.history-node summary{list-style:none}.history-node small,.history-node strong,.expand-label{display:block}.history-node small{color:var(--ink-soft);margin-bottom:8px;font-size:12px;font-weight:400}.history-node strong{font-size:19px;line-height:1.6}.expand-label{color:var(--ink-soft);margin-top:14px;font-size:13px;font-weight:400}.history-node[open] .expand-label{color:var(--green)}.mobile-lane{display:none}.history-node p{font-size:16px}.cross-link{text-align:center;border-top:1px dashed var(--line-strong);color:var(--green);margin:24px 0 0;padding:10px;font-size:14px}.convergence{border-bottom:2px solid var(--green);max-width:850px;margin:auto;padding:0 25px 25px}.join-lines{color:var(--green);justify-content:space-around;margin:10px 0 25px;font-size:38px;display:flex}.convergence h3{font-size:26px}.convergence p{font-size:17px}.review-end{border-top:1px solid var(--line);max-width:850px;margin:70px 0;padding:35px 0}.article-shell footer{border-top:1px solid var(--line);color:var(--ink-soft);max-width:850px;padding:30px 0;font-size:13px}.article-shell a{color:var(--green);overflow-wrap:anywhere}.article-shell a:focus-visible,.article-shell button:focus-visible,.article-shell summary:focus-visible{outline:3px solid var(--copper);outline-offset:4px}@media (width<=650px){.article-shell{padding:0 22px;font-size:17px}.masthead{align-items:flex-start;gap:10px}.masthead span{text-align:right;max-width:125px;font-size:12px}.intro{padding-top:42px}.intro h1{font-size:31px}.lede{font-size:20px}.contents{gap:10px 18px}.unit{padding-top:40px}.section-lede{font-size:18px}.article-shell h3{font-size:21px}.scene-heading{gap:14px}.transaction-strip{gap:9px}.transaction{padding:12px 8px}.transaction strong{font-size:22px}.transaction small,.transaction span{font-size:11px}.network-layout{grid-template-columns:1fr;gap:25px}.network svg{margin-top:12px}.network text{font-size:23px}.network .account{font-size:28px}.network .center-label{font-size:24px}.network-records{max-width:100%}.answer{padding:23px 20px}.responsibilities{grid-template-columns:1fr;gap:18px}.article-shell blockquote{font-size:23px}.task-map{height:390px}.tech-node{white-space:normal;max-width:40%;padding:8px;font-size:14px}.quadrant{padding:6px;font-size:11px}.axis-y,.axis-x{font-size:12px}.tech-details summary span{margin:8px 0 0 18px;font-size:14px;display:block}.lane-headings{display:none}.history-row{grid-template-columns:1fr;gap:12px;margin-bottom:0}.history-node:after{display:none}.era-label,.era-label span{display:block}.mobile-lane{letter-spacing:.06em;color:var(--copper);margin-bottom:6px;font-size:12px;display:block}.history-node{padding:16px 20px}.history-node strong{font-size:18px}.convergence{padding:0 0 20px}.join-lines{font-size:30px}.convergence h3{font-size:23px}.review-end{margin:40px 0}}.investigation{counter-reset:investigation;margin:25px 0;padding:0;list-style:none}.investigation>li{counter-increment:investigation;border-bottom:1px solid var(--line);padding:20px 0 25px 48px;position:relative}.investigation>li:before{content:counter(investigation,decimal-leading-zero);color:var(--copper);font-variant-numeric:tabular-nums;font-size:15px;position:absolute;top:20px;left:0}.investigation>li:not(:last-child):after{content:"↓";color:var(--ink-faint);font-size:18px;position:absolute;bottom:9px;left:9px}.step-heading{justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:10px;display:flex}.step-heading h5{color:var(--ink);margin:0;font-size:20px;font-weight:650}.step-heading>span{color:var(--green);font-size:13px}.investigation p:last-child{margin-bottom:0}.investigation-question{color:var(--green);font-size:22px}.investigation .answer{margin:14px 0 0;padding:18px 22px}.evidence-record{display:block}.investigation .evidence{padding:10px 0}.investigation .evidence summary{min-height:44px;font-size:15px;font-weight:500}.increment{padding:30px 0}.comparison{margin:25px 0}.comparison>div{border-top:1px solid var(--line);grid-template-columns:240px 1fr;gap:20px;padding:18px 0;display:grid}.comparison dt{color:var(--green);font-weight:650}.comparison dd{margin:0;font-size:17px}.comparison>div:last-child{border-bottom:1px solid var(--line)}@media (width<=650px){.investigation>li{padding-left:34px}.step-heading{display:block}.step-heading h5{font-size:19px}.step-heading>span{margin-top:4px;display:block}.investigation-question{font-size:20px}.investigation .answer{padding:16px}.comparison>div{grid-template-columns:1fr;gap:6px}.comparison dd{font-size:16px}}.transition{color:var(--green);margin:38px 0 12px;font-size:18px}.product-case{border-top:1px solid var(--line);padding:38px 0}.product-case:first-of-type{margin-top:35px}.scene-heading h4{margin:0 0 16px;font-size:23px;font-weight:600;line-height:1.6}.source-note h4{color:var(--ink);margin:0 0 16px;font-size:19px}.text-flow{margin:32px 0}.text-flow ol{border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--green);flex-wrap:wrap;gap:12px 28px;margin:12px 0;padding:18px 0;font-size:17px;list-style:none;display:flex}.text-flow li:not(:last-child):after{content:"→";color:var(--ink-soft);margin-left:28px}.decision-list{color:var(--green);padding-left:28px;font-size:20px}.decision-list li{padding:8px 0}.back-top{margin-top:30px}@media (width<=650px){.scene-heading h4{font-size:21px}.text-flow ol{display:block}.text-flow li{padding:7px 0}.text-flow li:not(:last-child):after{content:"↓";margin:5px 0 0;display:block}.product-case{padding-top:30px}}.key-conclusion{font-family:var(--font-display);max-width:900px;margin:42px 0 34px;font-size:clamp(23px,2.3vw,28px);font-weight:500;line-height:1.65}.key-conclusion strong{font-weight:600}.section-lede.key-conclusion{border-left:3px solid var(--green);padding:12px 22px}.axis-y{align-items:center}.axis-y strong,.axis-bottom strong{color:var(--green);font-size:16px}.axis-bottom{margin:10px 0 24px}.axis-x{border-top:1px solid var(--line);align-items:center;padding-top:12px}.axis-x strong{color:var(--green);font-size:16px}.axis-x>span{font-size:13px}.task-map{height:460px}.quadrant{letter-spacing:.06em;font-size:12px}.tech-node{z-index:2;border-width:1.5px;font-size:17px}.range{background:0 0;border-color:#a6ada2}.range>span{color:var(--ink-soft);white-space:nowrap;background:var(--paper);padding:0 5px;font-size:12px;line-height:1.6;position:absolute;left:12%}.range-context>span,.range-rag>span{bottom:-10px}.range-graph>span{top:-10px;left:30%}.range-sql>span{bottom:-10px;left:9%}.map-legend{color:var(--ink-soft);flex-wrap:wrap;gap:8px 24px;margin:22px 0 12px;font-size:13px;display:flex}.map-legend>span{align-items:center;gap:9px;display:flex}.map-legend i{flex:none;width:25px;height:14px;display:inline-block}.legend-node{border:1px solid var(--green);border-radius:2px}.legend-range{border:1px dashed #8d9689;border-radius:45%}.project-identity{color:var(--green);margin:-5px 0 22px;font-size:16px;font-weight:650}.project-identity span{color:var(--ink-soft);margin-left:16px;font-size:14px;font-weight:400}.convergence .project-identity{margin:0 0 18px;font-size:14px}.architecture,.business-architecture{border-top:2px solid var(--green);border-bottom:1px solid var(--line);margin:34px 0 32px;padding:22px 0}.architecture>figcaption,.business-architecture>figcaption{color:var(--green);margin-bottom:25px;font-size:15px;font-weight:600}.architecture h4{margin:0 0 25px;font-size:20px;line-height:1.6}.architecture h4>span{color:var(--copper);margin-right:12px;font-size:14px}.architecture h4 small{color:var(--ink-soft);margin-left:18px;font-size:14px;font-weight:400}.index-flow{grid-template-columns:1fr .55fr 1fr .55fr 1fr;align-items:center;gap:12px;padding:5px 0 30px;display:grid}.knowledge-object{text-align:center;flex-direction:column;align-items:center;display:flex}.knowledge-object strong{color:var(--green);margin:12px 0 3px;font-size:18px}.knowledge-object small{color:var(--ink-soft);font-size:14px}.document-symbol{border:1px solid var(--line-strong);border-top:3px solid var(--green);color:var(--green);background:var(--paper);padding:12px 20px;font-size:15px}.report-symbol{border-top-style:double;border-top-width:4px}.graph-symbol{width:160px;max-width:100%;height:60px;overflow:visible}.graph-symbol path{stroke:var(--green);fill:none;stroke-width:1.5px}.graph-symbol circle{fill:var(--paper);stroke:var(--green);stroke-width:2px}.flow-connector{text-align:center;color:var(--ink-soft)}.flow-connector span{font-size:13px;display:block}.flow-connector b{color:var(--green);font-size:26px;font-weight:400}.query-stage{border-top:1px solid var(--line);padding-top:25px}.query-paths{grid-template-columns:1fr 1fr;gap:35px;display:grid}.query-path+.query-path{border-left:1px solid var(--line);padding-left:35px}.query-path h5{color:var(--green);margin:0 0 20px;font-size:25px;line-height:1.5}.query-path>p:last-child{margin:20px 0 0;font-size:16px;line-height:1.8}.query-path .small-label{margin-bottom:4px}.retrieval-flow{margin:0;padding:0;list-style:none}.retrieval-flow li{min-height:74px;padding-bottom:18px;font-size:17px}.retrieval-flow li:not(:last-child):after{content:"↓";color:var(--green);margin-top:10px;line-height:1.2;display:block}.retrieval-flow li:last-child{border-top:1px solid var(--line);min-height:0;padding-top:12px;padding-bottom:0}.retrieval-flow small{color:var(--ink-soft);font-size:13px;display:block}.diagram-credit{color:var(--ink-soft);margin:25px 0 0;font-size:14px;line-height:1.7}.business-question{max-width:850px;margin:30px 0 35px}.business-question>p:last-child{font-family:var(--font-display);color:var(--ink);margin:0;font-size:26px;line-height:1.7}.implementation-note{border-bottom:1px solid var(--line);align-items:baseline;gap:25px;margin-bottom:0;padding-bottom:20px;display:flex}.implementation-note strong{color:var(--green);white-space:nowrap;font-size:17px}.implementation-note span{color:var(--ink-soft);font-size:14px}.business-flow{margin:0;padding:0;list-style:none}.business-flow>li{grid-template-columns:minmax(240px,.8fr) 1.2fr;align-items:center;gap:40px;padding:22px 0 30px;display:grid;position:relative}.business-flow>li:not(:last-child):after{content:"↓";color:var(--green);font-size:22px;position:absolute;bottom:-6px;left:16%}.business-node{text-align:center}.business-node small{color:var(--ink-soft);margin-bottom:3px;font-size:13px;display:block}.business-node strong{color:var(--green);font-size:22px;line-height:1.5}.business-flow>li>p{margin:0;font-size:16px}.database-node svg{width:105px;height:45px;fill:var(--paper);stroke:var(--green);stroke-width:1.5px;margin:0 auto 7px;display:block}.evidence-meta{border-top:1px solid var(--line);color:var(--ink-soft);margin-top:25px;padding-top:16px;font-size:15px;line-height:1.8}.evidence-meta strong{color:var(--green);margin-right:8px;font-size:13px;font-weight:650}.evidence-meta strong:not(:first-child){margin-left:14px}@media (width<=650px){.key-conclusion{margin:30px 0;font-size:23px;line-height:1.7}.task-map{height:440px}.tech-node{font-size:14px}.axis-y{gap:12px}.axis-y>span{font-size:11px}.axis-y strong,.axis-bottom strong,.axis-x strong{font-size:14px}.axis-x{flex-wrap:wrap;gap:8px}.axis-x>span{text-align:center;order:3;width:100%;font-size:12px}.range>span{padding:0 3px;font-size:12px}.range-context>span{left:0}.range-rag>span{left:15%}.range-graph>span{top:auto;bottom:-10px;left:5%}.range-sql>span{left:0}.project-identity span{margin:5px 0 0;display:block}.architecture h4 small{margin:5px 0 0 32px;display:block}.index-flow{grid-template-columns:1fr;gap:8px}.flow-connector{padding:0}.flow-connector b{font-size:0}.flow-connector b:after{content:"↓";font-size:24px}.query-paths{grid-template-columns:1fr;gap:28px}.query-path+.query-path{border-left:0;border-top:1px solid var(--line);padding:25px 0 0}.query-path h5{font-size:23px}.retrieval-flow li{min-height:0}.implementation-note{display:block}.implementation-note span{margin-top:8px;display:block}.business-question>p:last-child{font-size:23px}.business-flow>li{grid-template-columns:1fr;gap:10px;padding:24px 0 35px}.business-flow>li>p{text-align:center;font-size:16px}.business-flow>li:not(:last-child):after{left:calc(50% - 8px)}.business-node strong{font-size:21px}.evidence-meta{font-size:14px}.evidence-meta strong:not(:first-child){margin-left:0}}.article-shell .article-languages{flex-wrap:wrap;gap:8px 18px;font-size:14px;display:flex}.article-shell .article-languages [aria-current]{font-weight:650;text-decoration:none}.article-shell .related-reading{flex-wrap:wrap;gap:12px 25px;margin:30px 0;font-size:16px;display:flex}.article-shell .masthead{flex-wrap:wrap}.article-shell[lang=en] .range>span{white-space:normal;max-width:190px;font-size:11px}.article-shell[lang=en] .range-context>span,.article-shell[lang=en] .range-graph>span{left:0}.article-shell[lang=en] .tech-node{font-size:15px}@media (width<=650px){.article-shell[lang=en] .tech-node{max-width:40%;padding:7px;font-size:12px}.article-shell[lang=en] .range>span{max-width:140px;font-size:10px}.article-shell[lang=ja] .range>span{white-space:normal;max-width:160px;font-size:10px}}