:root{--bg:#f4f7fb;--panel:#fff;--text:#172033;--muted:#5e6b82;--line:#dbe3ef;--accent:#2f6fed;--soft:#eaf1ff;--ok:#177a4d;--warn:#9a6700;--danger:#b42318;--code:#111827;--codeText:#e5eefc}
[data-theme="dark"]{--bg:#0e1420;--panel:#151e2d;--text:#edf3ff;--muted:#aab7cc;--line:#2d3a50;--accent:#7aa2ff;--soft:#1b2b48;--code:#08101c;--codeText:#dce8ff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.shell{max-width:1440px;margin:auto;padding:24px}.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.topbar .inner{max-width:1440px;margin:auto;padding:12px 24px;display:flex;gap:12px;align-items:center;justify-content:space-between}.brand{font-weight:800}.nav{display:flex;gap:8px;flex-wrap:wrap}.btn,a.btn{border:1px solid var(--line);background:var(--panel);color:var(--text);padding:9px 12px;border-radius:12px;text-decoration:none;cursor:pointer}.btn.primary{background:var(--accent);color:white;border-color:var(--accent)}.hero{padding:40px 0 24px;display:grid;grid-template-columns:1.3fr .7fr;gap:24px}.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 8px 28px rgba(15,23,42,.06)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.eyebrow{font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);font-weight:800}.muted{color:var(--muted)}h1{font-size:clamp(2rem,5vw,4.2rem);line-height:1.05;margin:.2em 0}h2{margin-top:1.6em}details.chapter{background:var(--panel);border:1px solid var(--line);border-radius:16px;margin:14px 0;overflow:hidden}details.chapter>summary{padding:18px 20px;cursor:pointer;font-weight:800;list-style:none;display:flex;justify-content:space-between;gap:12px}details.chapter>summary::-webkit-details-marker{display:none}.chapter-body{padding:0 20px 20px;border-top:1px solid var(--line)}.pill{display:inline-flex;padding:4px 9px;border-radius:999px;background:var(--soft);color:var(--accent);font-size:.8rem;font-weight:700}.callout{border-left:4px solid var(--accent);background:var(--soft);padding:14px 16px;border-radius:10px;margin:14px 0}.decision{border-left-color:var(--warn)}.danger{border-left-color:var(--danger)}pre{background:var(--code);color:var(--codeText);padding:16px;border-radius:14px;overflow:auto;tab-size:4}code{font-family:"SFMono-Regular",Consolas,monospace}.map{width:100%;min-height:620px;border:1px solid var(--line);border-radius:18px;background:var(--panel)}.node{cursor:pointer}.node rect{fill:var(--panel);stroke:var(--accent);stroke-width:2}.node text{fill:var(--text);font-size:14px;font-weight:700}.edge{stroke:var(--muted);stroke-width:2;marker-end:url(#arrow)}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.search{width:min(520px,100%);padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text)}.progress{height:10px;background:var(--line);border-radius:999px;overflow:hidden}.progress span{display:block;height:100%;background:var(--accent)}.story-step{display:grid;grid-template-columns:48px 1fr;gap:14px;align-items:start}.story-step .num{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:#fff;font-weight:800}.footer{margin:40px 0 12px;color:var(--muted);font-size:.9rem}@media(max-width:800px){.hero{grid-template-columns:1fr}.shell{padding:16px}.topbar .inner{padding:10px 16px}.map{min-height:520px}}

.lead{font-size:1.18rem;color:var(--muted);max-width:900px}.topic-svg{width:100%;max-height:300px;color:var(--accent);background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px;margin:18px 0}.topic-svg rect{fill:var(--soft);stroke:currentColor;stroke-width:2}.topic-svg text{fill:var(--text)}.topic-card{display:block;text-decoration:none;color:inherit;transition:transform .15s ease,border-color .15s ease}.topic-card:hover{transform:translateY(-3px);border-color:var(--accent)}.decision-table{width:100%;border-collapse:collapse;margin:16px 0}.decision-table th,.decision-table td{border:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}.topic-nav{display:flex;justify-content:space-between;gap:12px;margin-top:24px}.topic-page p,.topic-page li{max-width:1000px}@media(max-width:700px){.topic-nav{flex-direction:column}.decision-table{font-size:.92rem}}

.content-enrichment{margin-top:1.5rem}.content-enrichment h2{margin-top:0}.content-enrichment pre{white-space:pre-wrap}.content-enrichment li{margin:.35rem 0}