:root {
  --background: #f1f0e9; --foreground: #17201f; --card: #faf9f3; --muted: #e5e4dc;
  --muted-foreground: #65706d; --border: #c9cbc2; --accent: #d9ff69;
  --fact: #b9e7ea; --interpretation: #ddd1ff; --assumption: #f7d99b;
  --prediction: #ffc2aa; --value: #f5b7d1; --proposal: #d9ff69;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--background); color: var(--foreground); font-family: var(--sans); }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
[hidden] { display: none !important; }
.topbar { position: sticky; top: 0; z-index: 30; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; min-height: 68px; padding: 10px 24px; border-bottom: 1px solid var(--border); background: color-mix(in srgb, var(--background) 88%, transparent); backdrop-filter: blur(18px); }
.brand { display: inline-flex; width: fit-content; align-items: center; gap: 11px; color: inherit; text-decoration: none; }
.brand-mark { display: grid; width: 36px; height: 36px; place-items: center; border-radius: 50%; background: var(--foreground); color: var(--background); font: 700 10px/1 var(--mono); letter-spacing: .08em; }
.brand strong { display: block; font-size: 13px; letter-spacing: .09em; }
.brand small { display: block; margin-top: 2px; color: var(--muted-foreground); font: 9px/1.2 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.view-switch { display: flex; gap: 2px; padding: 3px; border: 1px solid var(--border); border-radius: 999px; background: var(--card); }
.view-switch button { min-height: 32px; padding: 0 13px; border: 0; border-radius: 999px; background: transparent; color: var(--muted-foreground); font-size: 12px; cursor: pointer; }
.view-switch button[data-active="true"] { background: var(--foreground); color: var(--background); }
.export-button { justify-self: end; height: 38px; padding: 0 16px; border: 1px solid var(--foreground); border-radius: 999px; background: var(--foreground); color: var(--background); font-weight: 650; cursor: pointer; }
.export-button:hover { background: #31413f; }
.question-bar { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 56px; align-items: end; padding: 42px 24px 36px; border-bottom: 1px solid var(--border); }
.question-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; color: var(--muted-foreground); font: 10px/1.2 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.preview-badge, .type-badge { display: inline-flex; align-items: center; height: 24px; padding: 0 9px; border: 1px solid var(--foreground); border-radius: 999px; background: var(--accent); color: var(--foreground); }
.question-bar h1 { max-width: 1050px; margin: 18px 0 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2rem, 4.15vw, 4.7rem); font-weight: 400; line-height: .98; letter-spacing: -.055em; text-wrap: balance; }
.question-note { display: grid; grid-template-columns: 26px 1fr; gap: 10px; padding-top: 18px; border-top: 1px solid var(--foreground); }
.question-note p { margin: 0; color: var(--muted-foreground); font-size: 12px; line-height: 1.55; }
.question-note strong { color: var(--foreground); }
.workspace { display: grid; grid-template-columns: 210px minmax(560px, 1fr) 330px; min-height: 670px; border-bottom: 1px solid var(--border); }
.filter-panel, .evidence-panel { background: var(--card); }
.filter-panel { padding: 22px 16px; border-right: 1px solid var(--border); }
.panel-heading { display: flex; gap: 8px; padding: 0 7px 16px; font: 700 10px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.filter-list { display: grid; gap: 3px; }
.filter-list button { display: grid; grid-template-columns: 10px 1fr auto; gap: 9px; align-items: center; width: 100%; min-height: 36px; padding: 0 9px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--muted-foreground); font-size: 11px; text-align: left; cursor: pointer; }
.filter-list button:hover { background: var(--muted); color: var(--foreground); }
.filter-list button[data-active="true"] { border-color: var(--border); background: var(--background); color: var(--foreground); font-weight: 650; }
.filter-list small { font: 9px/1 var(--mono); }
.filter-dot { width: 8px; height: 8px; border: 1px solid #68716e; border-radius: 50%; background: var(--node-color); }
.filter-dot.all { background: var(--foreground); }
.method-card { margin-top: 30px; padding: 18px; border-radius: 12px; background: var(--foreground); color: var(--background); }
.method-icon { font-size: 22px; }
.method-label { margin: 28px 0 8px; color: #9ea6a1; font: 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.method-card strong { display: block; font-family: Georgia, "Times New Roman", serif; font-size: 17px; font-weight: 400; line-height: 1.2; }
.method-card > p:last-child { margin: 14px 0 0; color: #adb2ae; font-size: 10px; line-height: 1.5; }
.map-shell { min-width: 0; background-color: #ebeae2; background-image: radial-gradient(#bec1b8 1px, transparent 1px); background-size: 20px 20px; }
.map-caption { display: flex; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--border); background: rgb(241 240 233 / 84%); color: var(--muted-foreground); font: 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.map-caption span { display: flex; align-items: center; gap: 7px; }
.status-light { width: 7px; height: 7px; border-radius: 50%; background: #4b8b56; box-shadow: 0 0 0 3px rgb(75 139 86 / 18%); }
.map-scroll { overflow: auto; }
.claim-map { position: relative; width: 100%; min-width: 820px; height: 620px; }
.relations { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.relations line { stroke: #7f8984; stroke-width: .16; stroke-dasharray: .7 .55; opacity: .22; vector-effect: non-scaling-stroke; transition: opacity .2s ease; }
.relations line[data-visible="true"] { opacity: .75; }
.claim-node { --node-color: var(--muted); position: absolute; z-index: 2; width: 168px; min-height: 98px; padding: 11px 12px 12px; border: 1px solid rgb(23 32 31 / 22%); border-radius: 10px; background: color-mix(in srgb, var(--node-color) 88%, white); color: var(--foreground); text-align: left; box-shadow: 0 6px 22px rgb(23 32 31 / 7%); cursor: pointer; transform: translate(-2%, -2%); transition: opacity .18s ease, transform .18s ease, box-shadow .18s ease; }
.claim-node:hover { transform: translate(-2%, -6%); box-shadow: 0 12px 26px rgb(23 32 31 / 14%); }
.claim-node[data-selected="true"] { outline: 2px solid var(--foreground); outline-offset: 2px; }
.claim-node[data-dimmed="true"] { opacity: .18; }
.node-topline { display: flex; align-items: center; gap: 7px; margin-bottom: 12px; font: 8px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.node-topline b { display: grid; width: 22px; height: 22px; place-items: center; border-radius: 50%; background: var(--foreground); color: var(--background); font-size: 8px; }
.claim-node > strong { display: block; font-size: 11px; line-height: 1.35; }
.kind-fact { --node-color: var(--fact); }.kind-interpretation { --node-color: var(--interpretation); }.kind-assumption { --node-color: var(--assumption); }.kind-prediction { --node-color: var(--prediction); }.kind-value { --node-color: var(--value); }.kind-proposal { --node-color: var(--proposal); }
.evidence-panel { position: relative; padding: 28px 24px; border-left: 1px solid var(--border); overflow: hidden; }
.evidence-accent { position: absolute; top: 0; right: 0; left: 0; height: 6px; background: var(--node-color); }
.evidence-head { display: flex; align-items: center; justify-content: space-between; }
.evidence-head > span:first-child { display: grid; width: 34px; height: 34px; place-items: center; border-radius: 50%; background: var(--foreground); color: var(--background); font: 9px/1 var(--mono); }
.type-badge { border-color: var(--border); background: var(--background); font: 8px/1 var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.evidence-eyebrow, .kicker { margin: 42px 0 11px; color: var(--muted-foreground); font: 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .12em; }
.evidence-panel h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: 27px; font-weight: 400; line-height: 1.08; letter-spacing: -.035em; }
.evidence-detail { margin: 17px 0 0; color: var(--muted-foreground); font-size: 12px; line-height: 1.65; }
.confidence-row { display: grid; grid-template-columns: 28px 1fr; gap: 9px; align-items: center; margin-top: 24px; padding: 13px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.confidence-row small, .source-link small { display: block; margin-bottom: 4px; color: var(--muted-foreground); font: 8px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.confidence-row strong, .source-link strong { display: block; font-size: 10px; line-height: 1.35; }
.source-link { display: grid; grid-template-columns: 1fr 18px; gap: 10px; align-items: center; margin-top: 14px; padding: 14px; border-radius: 10px; background: var(--background); color: inherit; text-decoration: none; }
.source-link:hover { outline: 1px solid var(--foreground); }
.source-gap { display: grid; grid-template-columns: 22px 1fr; gap: 9px; margin-top: 14px; padding: 14px; border-radius: 10px; background: var(--background); }
.source-gap p { margin: 0; color: var(--muted-foreground); font-size: 10px; line-height: 1.5; }
.related-list { margin-top: 26px; }.related-list > p { font: 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.related-list button { display: grid; grid-template-columns: 26px 1fr 14px; gap: 8px; align-items: start; width: 100%; padding: 11px 0; border: 0; border-top: 1px solid var(--border); background: transparent; color: inherit; text-align: left; cursor: pointer; }
.related-list button > span { padding-top: 2px; color: var(--muted-foreground); font: 8px/1 var(--mono); }.related-list button p { margin: 0; font-size: 10px; line-height: 1.4; }
.brief-view { padding: 64px 24px 84px; }
.brief-intro { display: grid; grid-template-columns: .55fr 1.25fr .7fr; gap: 40px; align-items: start; padding-bottom: 50px; border-bottom: 1px solid var(--border); }
.brief-intro .kicker { margin: 6px 0 0; }.brief-intro h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.4rem, 4vw, 4.7rem); font-weight: 400; line-height: .95; letter-spacing: -.055em; }.brief-intro > p:last-child { margin: 4px 0 0; color: var(--muted-foreground); font-size: 13px; line-height: 1.7; }
.brief-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 1px; background: var(--border); border: 1px solid var(--border); }
.brief-card { min-height: 320px; padding: 34px; background: var(--card); }.brief-icon { font-size: 21px; }.brief-card .kicker { margin-top: 55px; }.brief-card h3 { max-width: 600px; margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.7rem, 3vw, 3rem); font-weight: 400; line-height: 1; letter-spacing: -.045em; }.brief-card ul, .brief-card > p:last-child { margin: 24px 0 0; padding-left: 18px; color: var(--muted-foreground); font-size: 12px; line-height: 1.7; }
.brief-card.fact-card { background: color-mix(in srgb, var(--fact) 45%, var(--card)); }.brief-card.question-card { background: color-mix(in srgb, var(--assumption) 42%, var(--card)); }.brief-card.value-card { background: color-mix(in srgb, var(--value) 35%, var(--card)); }.brief-card.proposal-card { background: color-mix(in srgb, var(--proposal) 48%, var(--card)); }
footer { display: flex; justify-content: space-between; gap: 24px; padding: 28px 24px; color: var(--muted-foreground); font: 9px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .08em; } footer p { margin: 0; } footer strong { color: var(--foreground); }
@media (max-width: 1120px) { .workspace { grid-template-columns: 190px minmax(560px, 1fr); }.evidence-panel { grid-column: 1 / -1; border-top: 1px solid var(--border); border-left: 0; }.evidence-panel h2, .related-list { max-width: 720px; } }
@media (max-width: 760px) { .topbar { grid-template-columns: 1fr auto; padding: 9px 14px; }.view-switch { grid-column: 1 / -1; grid-row: 2; justify-self: stretch; margin-top: 8px; }.view-switch button { flex: 1; }.export-button { padding: 0 12px; }.question-bar { grid-template-columns: 1fr; gap: 28px; padding: 34px 16px 28px; }.question-bar h1 { font-size: 2.55rem; }.workspace { display: block; }.filter-panel { border-right: 0; border-bottom: 1px solid var(--border); }.filter-list { grid-template-columns: repeat(2, 1fr); }.method-card { display: none; }.claim-map { min-width: 790px; }.evidence-panel { padding: 26px 18px; }.brief-view { padding: 44px 16px 64px; }.brief-intro { grid-template-columns: 1fr; gap: 20px; }.brief-grid { grid-template-columns: 1fr; }.brief-card { min-height: 280px; padding: 28px; }footer { flex-direction: column; padding: 24px 16px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; } }

/* Release accessibility and phone layout; preserve the case-study visual identity. */
body { font-size: 16px; line-height: 1.5; }
button:focus-visible,a:focus-visible { outline: 3px solid #245a9c; outline-offset: 3px; }
.skip-link { position: fixed; top: -90px; left: 12px; z-index: 50; background: #17201f; color: white; padding: 12px; }
.skip-link:focus { top: 12px; }
.brand strong { font-size: 14px; }.brand small,.brand-mark { font-size: 12px; }
.view-switch button { min-height: 40px; font-size: 14px; }.export-button { min-height: 44px; font-size: 14px; }
.question-bar { gap: 30px; padding: 24px; align-items: center; }
.question-meta { font-size: 12px; line-height: 1.5; letter-spacing: .03em; }
.question-bar h1 { font-size: clamp(26px,2.8vw,40px); line-height: 1.12; letter-spacing: -.025em; margin-top: 10px; }
.question-note p { font-size: 14px; }
.workspace { grid-template-columns: 230px minmax(480px,1fr) 350px; align-items: start; }
.panel-heading { font-size: 12px; line-height: 1.4; }
.filter-list button { font-size: 14px; min-height: 44px; padding: 8px 9px; }
.filter-list small,.method-label { font-size: 12px; }.method-label { line-height: 1.4; margin-top: 18px; }
.method-card strong { font-size: 20px; }.method-card>p:last-child { font-size: 14px; }
.map-caption { font-size: 12px; line-height: 1.4; letter-spacing: .02em; flex-wrap: wrap; gap: 8px; }
.claim-map { min-width: 1120px; height: 860px; }
.claim-node { width: 220px; min-height: 160px; padding: 14px; }
.node-topline { font-size: 12px; line-height: 1.35; letter-spacing: 0; margin-bottom: 10px; }
.node-topline b { font-size: 12px; flex-shrink: 0; width: 28px; height: 28px; }
.claim-node>strong { font-size: 15px; line-height: 1.4; }
.claim-node[data-dimmed="true"] { opacity: .48; }
.relations line { stroke-width: 1.5; }
.kind-assessment { --node-color: #bfddd0; }
.evidence-panel { scroll-margin-top: 88px; }
.evidence-head>span:first-child,.type-badge { font-size: 12px; }.type-badge { height: auto; min-height: 28px; padding: 5px 9px; }
.evidence-eyebrow,.kicker { font-size: 12px; line-height: 1.5; letter-spacing: .05em; }
.evidence-eyebrow { margin-top: 24px; }.evidence-detail { font-size: 16px; }
.confidence-row small,.source-link small { font-size: 12px; line-height: 1.4; }
.confidence-row strong,.source-link strong,.source-gap p { font-size: 14px; line-height: 1.5; }
.source-limit { font-size: 14px; color: #53615b; margin: 12px 0; }
.related-list>p,.related-list button>span { font-size: 12px; line-height: 1.4; }
.related-list button p { font-size: 14px; }.related-list button { min-height: 44px; }
.brief-view { padding-top: 32px; }.brief-intro { grid-template-columns: .6fr 1.3fr 1fr; gap: 26px; padding-bottom: 30px; }
.brief-intro h2 { font-size: clamp(28px,3vw,42px); line-height: 1.08; letter-spacing: -.025em; }
.brief-intro>p:last-child { font-size: 16px; }.brief-card { min-height: 0; padding: 26px; }
.brief-card .kicker { margin-top: 24px; }.brief-card h3 { font-size: 30px; line-height: 1.12; }
.brief-card ul,.brief-card>p:last-child { font-size: 16px; }
.brief-references { margin-top: 30px; max-width: 950px; }.brief-references li { margin: 18px 0; }.brief-references li p { color: #53615b; margin: 6px 0; }
footer { font-size: 12px; letter-spacing: .025em; line-height: 1.6; }
@media(max-width:1120px) {
  .workspace { grid-template-columns: 230px minmax(0,1fr); }.evidence-panel { grid-column:1/-1; }
}
@media(max-width:760px) {
  .question-bar { padding: 20px 16px; gap: 16px; }.question-bar h1 { font-size: 26px; }.question-note { padding-top: 12px; }
  .workspace { display: block; }.filter-panel { padding: 18px 12px; }.filter-list { gap: 4px; }
  .filter-list button { grid-template-columns: 8px 1fr auto; gap: 6px; font-size: 13px; padding: 8px 5px; }
  .map-scroll { overflow: visible; }.claim-map { min-width: 0; width: auto; height: auto; display: grid; gap: 14px; padding: 18px 16px; }
  .claim-node { position: static; width: 100%; min-height: 0; transform: none; }
  .claim-node:hover { transform: none; }.relations { display: none; }
  .claim-node>strong { font-size: 16px; }.map-caption { font-size: 12px; padding: 12px 16px; }
  .evidence-panel { scroll-margin-top: 126px; }.evidence-panel h2 { font-size: 28px; }
  .brief-intro { grid-template-columns: 1fr; }.brief-card { padding: 22px; }.brief-card h3 { font-size: 28px; }
}