:root{--bg:#0a0e17;--bg-elev:#121826;--bg-elev-2:#1a2233;--border:#263149;--text:#e6ebf5;--text-dim:#9aa6be;--text-faint:#6b7793;--accent:#6ea8fe;--accent-2:#9d7bff;--prereq:#57d9a3;--tangent:#f0a35e;--measure:68ch;--radius:10px}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:radial-gradient(1200px 600px at 80% -10%,rgba(157,123,255,.1),transparent 60%),radial-gradient(900px 500px at 0 0,rgba(110,168,254,.08),transparent 55%),var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.site-header{border-bottom:1px solid var(--border);background:rgba(10,14,23,.72);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:-webkit-sticky;position:sticky;top:0;z-index:10}.site-header .inner{max-width:1280px;margin:0 auto;padding:.75rem 1.25rem;display:flex;align-items:center;gap:1.25rem}.brand{font-weight:700;font-size:1.15rem;letter-spacing:.02em;color:var(--text)}.brand:hover{text-decoration:none}.brand .dot{color:var(--accent)}.nav-links{display:flex;gap:1rem;margin-left:auto;font-size:.95rem}.nav-links a{color:var(--text-dim)}.nav-links a:hover{color:var(--text);text-decoration:none}.container{max-width:1280px;margin:0 auto;padding:2rem 1.25rem 5rem}.prose{max-width:none}.prose>blockquote,.prose>h1,.prose>h2,.prose>h3,.prose>ol,.prose>p,.prose>ul{max-width:var(--measure)}.prose p{margin:.9rem 0}.fig{margin:1.6rem 0}.fig img{display:block;width:100%;height:auto;border-radius:10px;border:1px solid var(--border)}.fig figcaption{margin-top:.55rem;max-width:var(--measure);font-size:.85rem;line-height:1.45;color:var(--text-dim)}.fig-credit{color:var(--text-faint)}.fig-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));grid-gap:1rem;gap:1rem;margin:1.6rem 0}.fig-row .fig{margin:0}.prose h1{font-size:2rem;line-height:1.2;margin:0 0 .5rem}.prose h2{font-size:1.3rem;margin:2rem 0 .5rem}.prose code{background:var(--bg-elev-2);padding:.1em .35em;border-radius:5px;font-size:.9em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.deep-dive pre,.prose pre{background:var(--bg-elev-2);border:1px solid var(--border);border-radius:8px;padding:.85rem 1rem;overflow-x:auto;margin:.9rem 0;max-width:var(--measure);font-size:.86rem;line-height:1.55}.deep-dive pre code,.prose pre code{background:none;padding:0;border-radius:0;font-size:inherit;color:var(--text)}.breadcrumbs{font-size:.85rem;color:var(--text-faint);margin-bottom:1rem;display:flex;flex-wrap:wrap;gap:.35rem;align-items:center}.breadcrumbs a{color:var(--text-dim)}.breadcrumbs .sep{color:var(--text-faint)}.term{color:var(--accent);border-bottom:1px dashed rgba(110,168,254,.5);cursor:pointer;position:relative}.term.is-glossary{color:var(--prereq);border-bottom-color:rgba(87,217,163,.5)}.term:focus-visible{outline:2px solid var(--accent);border-radius:3px}.term-pop{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);width:min(320px,78vw);background:var(--bg-elev-2);border:1px solid var(--border);border-radius:var(--radius);padding:.7rem .8rem;box-shadow:0 12px 40px rgba(0,0,0,.5);z-index:20;font-size:.85rem;line-height:1.5;color:var(--text);cursor:default}.term-pop .pop-title{font-weight:600;font-size:.8rem;color:var(--text-dim);margin-bottom:.2rem}.term-pop .pop-more{display:inline-block;margin-top:.45rem;font-size:.8rem}.children-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));grid-gap:.9rem;gap:.9rem;margin:1.5rem 0;max-width:none}.card{display:block;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;transition:border-color .15s ease,transform .15s ease}.card:hover{border-color:var(--accent);text-decoration:none;transform:translateY(-2px)}.card .card-title{font-weight:600;color:var(--text);margin-bottom:.3rem}.card .card-blurb{font-size:.85rem;color:var(--text-dim);line-height:1.5}.section-label{text-transform:uppercase;letter-spacing:.08em;font-size:.72rem;color:var(--text-faint);margin:2rem 0 .5rem}.related-links{display:flex;flex-wrap:wrap;gap:.5rem;margin:.25rem 0 .5rem}.related-chip{display:inline-block;background:var(--bg-elev);border:1px solid var(--border);border-radius:999px;padding:.3rem .8rem;font-size:.85rem;color:var(--text-dim);transition:border-color .15s ease,color .15s ease}.related-chip:hover{border-color:var(--accent);color:var(--text);text-decoration:none}.hero{max-width:var(--measure);margin:2rem 0 1rem}.hero h1{font-size:2.6rem;margin:0 0 .5rem;letter-spacing:-.01em}.hero .tagline{font-size:1.15rem;color:var(--text-dim)}.page-layout{display:grid;grid-template-columns:216px minmax(0,1fr);grid-gap:2rem;gap:2rem;align-items:start}.sidebar{position:-webkit-sticky;position:sticky;top:76px}@media (max-width:860px){.page-layout{grid-template-columns:minmax(0,1fr)}.sidebar{display:none}}.concept-tree{font-size:.88rem}.tree-heading{text-transform:uppercase;letter-spacing:.08em;font-size:.7rem;color:var(--text-faint);margin-bottom:.6rem}.concept-tree ul,.tree{list-style:none;margin:0;padding:0}.tree .tree{padding-left:.6rem;margin-left:.35rem;border-left:1px solid var(--border)}.tree li{margin:.12rem 0}.tree-link{display:block;padding:.18rem .4rem;border-radius:5px;color:var(--text-dim)}.tree-caret{display:inline-block;width:.9em;margin-left:-.2em;color:var(--text-faint);font-size:.7em}.tree-link:hover{text-decoration:none;background:var(--bg-elev)}.tree-link.on-path,.tree-link:hover{color:var(--text)}.tree-link.current{color:var(--accent);font-weight:600;background:var(--bg-elev)}.map-toggle{display:flex;margin:0 0 .75rem}.map-toggle button{background:var(--bg-elev);border:1px solid var(--border);color:var(--text-dim);padding:.35rem .85rem;font-size:.85rem;cursor:pointer}.map-toggle button:first-child{border-radius:6px 0 0 6px}.map-toggle button:last-child{border-radius:0 6px 6px 0;border-left:none}.map-toggle button.active{background:var(--accent);color:#0a0e17;border-color:var(--accent);font-weight:600}.graph-wrap{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin:1rem 0}.graph-wrap svg{display:block;width:100%;height:auto}.graph-legend{display:flex;gap:1.2rem;flex-wrap:wrap;font-size:.8rem;color:var(--text-dim);margin:.75rem 0 0}.graph-legend .swatch{display:inline-block;width:22px;height:0;border-top-width:2px;border-top-style:solid;vertical-align:middle;margin-right:.4rem}.katex-display{overflow-x:auto;overflow-y:hidden;padding:.4rem 0}.viz{margin:1.6rem 0;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);max-width:none}.viz-body{padding:1.25rem}.viz-readout{display:flex;align-items:baseline;gap:.5rem}.viz-number{font-size:2.6rem;font-weight:700;color:var(--accent);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.viz-unit{color:var(--text-dim)}.viz-bar{height:8px;background:var(--bg-elev-2);border-radius:999px;overflow:hidden;margin:.75rem 0 1rem}.viz-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .12s ease-out}.viz-control{display:flex;flex-direction:column;gap:.4rem;font-size:.9rem;color:var(--text-dim)}.viz-control input[type=range]{width:100%;accent-color:var(--accent)}.viz-caption{font-size:.82rem;color:var(--text-faint);margin:.9rem 0 0;line-height:1.5}.viz svg{display:block;width:100%;height:auto;margin-bottom:.5rem}.viz-control+.viz-control{margin-top:.6rem}.viz-fate{font-size:.92rem;color:var(--text);background:var(--bg-elev-2);border-left:3px solid var(--accent-2);padding:.55rem .75rem;border-radius:0 6px 6px 0;margin:.25rem 0 1rem}.timeline-detail{margin:.5rem 0 .75rem}.timeline-when{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--accent)}.timeline-title{font-size:1.15rem;font-weight:700;margin:.1rem 0 .3rem}.timeline-desc{font-size:.9rem;color:var(--text-dim);margin:0;line-height:1.55}.timeline-steps{display:flex;gap:.6rem}.timeline-steps button{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:.35rem .75rem;font-size:.85rem;cursor:pointer}.timeline-steps button:hover:not(:disabled){border-color:var(--accent)}.timeline-steps button:disabled{opacity:.4;cursor:default}.cite{font-size:.7em;line-height:0}.cite a{color:var(--accent);text-decoration:none;padding:0 .05em}.cite a:hover{text-decoration:underline}.sources{max-width:var(--measure);margin-top:2.5rem;padding-top:1rem;border-top:1px solid var(--border)}.sources-list{margin:0;padding-left:1.2rem;font-size:.85rem;color:var(--text-dim)}.sources-list li{margin:.3rem 0}.sources-list a{color:var(--text-dim)}.sources-list a:hover{color:var(--accent)}.tree-scroll{overflow-x:auto;overflow-y:hidden;margin-bottom:.5rem;padding-bottom:6px;-webkit-overflow-scrolling:touch}.tree-scroll svg{display:block;width:auto;max-width:none}.tree-detail{background:var(--bg-elev-2);border-left:3px solid var(--prereq);border-radius:0 6px 6px 0;padding:.6rem .8rem;margin:.5rem 0 .75rem}.tree-detail-head{display:flex;align-items:baseline;gap:.6rem;flex-wrap:wrap}.tree-detail-name{font-weight:700}.tree-detail-when{font-size:.78rem;color:var(--accent)}.tree-detail-note{margin:.3rem 0 0;font-size:.9rem;color:var(--text-dim);line-height:1.5}.lc-panels{display:flex;flex-wrap:wrap;gap:1rem}.lc-panel{flex:1 1 260px;min-width:0;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:8px;padding:.6rem .7rem .4rem}.lc-panel-title{font-weight:600;font-size:.95rem}.lc-panel-sub{font-size:.78rem;color:var(--text-faint);margin-bottom:.3rem;min-height:2.1em}.lc-readout{margin:.9rem 0 .2rem;font-size:.95rem;color:var(--text);background:var(--bg-elev-2);border-left:3px solid var(--accent-2);padding:.55rem .75rem;border-radius:0 6px 6px 0}.lc-controls{display:flex;gap:.6rem;margin-top:.6rem}.lc-controls button{background:var(--bg-elev-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:.35rem .8rem;font-size:.85rem;cursor:pointer}.lc-controls button:hover{border-color:var(--accent)}.rt-crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.2rem;margin-bottom:.5rem;font-size:.85rem}.rt-crumbs button{background:none;border:none;color:var(--text-dim);cursor:pointer;padding:.15rem .35rem;border-radius:5px;font-size:.85rem}.rt-crumbs button:hover{color:var(--text);background:var(--bg-elev)}.rt-crumbs button.current{color:var(--accent);font-weight:600}.rt-sep{color:var(--text-faint)}.article-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.mode-toggle{display:inline-flex;border:1px solid var(--border);border-radius:999px;overflow:hidden;flex-shrink:0}.mode-toggle button{background:var(--bg-elev);color:var(--text-dim);border:none;padding:.3rem .85rem;font-size:.82rem;cursor:pointer}.mode-toggle button.active{background:var(--accent);color:#0a0e17;font-weight:600}.deep-dive{display:none;max-width:var(--measure);background:var(--bg-elev);border:1px solid var(--border);border-left:3px solid var(--accent-2);border-radius:0 8px 8px 0;padding:1rem 1.15rem .6rem;margin:1.5rem 0}:root[data-mode=deep] .deep-dive{display:block}.deep-dive-label{text-transform:uppercase;letter-spacing:.09em;font-size:.68rem;color:var(--accent-2);margin-bottom:.6rem}.deep-dive p{margin:.6rem 0}.deep-dive table,.prose table{border-collapse:collapse;margin:.9rem 0;font-size:.9rem;display:block;overflow-x:auto}.deep-dive td,.deep-dive th,.prose td,.prose th{border:1px solid var(--border);padding:.3rem .7rem;text-align:center}.deep-dive th,.prose th{background:var(--bg-elev-2);color:var(--text);font-weight:600}.deep-dive td,.prose td{color:var(--text-dim)}.viz-placeholder{border-style:dashed}.viz-ph-title{font-weight:600;color:var(--text-dim)}.viz-ph-note{font-size:.82rem;color:var(--text-faint);margin-top:.25rem}.auth-slot{display:inline-flex;align-items:center;gap:.5rem;min-width:5.5rem;justify-content:flex-end}.auth-button{display:inline-flex;align-items:baseline;gap:.4rem;background:transparent;border:1px solid var(--border);border-radius:999px;color:var(--text-dim);font:inherit;font-size:.85rem;padding:.2rem .7rem;cursor:pointer}.auth-button:hover:not(:disabled){color:var(--text);border-color:var(--accent)}.auth-button:disabled{opacity:.5;cursor:default}.auth-why{color:var(--text-faint);font-size:.75rem}.auth-error{color:var(--tangent);font-size:.8rem}.progress-slot{margin:2rem 0 0;padding-top:.9rem;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;align-items:baseline;gap:.6rem;min-height:2.5rem}.progress-note{color:var(--text-faint);font-size:.8rem}.yourmap-stats{display:flex;flex-wrap:wrap;gap:1.25rem;margin:.5rem 0 1.5rem;color:var(--text-dim);font-size:.95rem}.yourmap-stats b{color:var(--text);font-size:1.15rem}.yourmap-blocked{list-style:none;padding:0;margin:.5rem 0 1.5rem;display:grid;grid-gap:.5rem;gap:.5rem}.yourmap-actions{display:flex;gap:.6rem;margin:1.5rem 0 .5rem;flex-wrap:wrap}.request-form{display:grid;grid-gap:.6rem;gap:.6rem;max-width:var(--measure);margin:1rem 0 2rem}.request-form .recognize-field{display:grid;grid-gap:.3rem;gap:.3rem;font-size:.9rem;color:var(--text-dim)}.request-form input,.request-form textarea{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font:inherit;padding:.5rem .7rem;width:100%}.request-list{list-style:none;padding:0;margin:1rem 0 0;display:grid;grid-gap:.75rem;gap:.75rem}.request{display:flex;align-items:flex-start;gap:.8rem;padding:.75rem .9rem;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius)}.request--published{border-color:var(--prereq)}.request--declined{opacity:.55}.request-vote{background:transparent;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-dim);font:inherit;font-size:.85rem;padding:.25rem .5rem;cursor:pointer;white-space:nowrap}.request-vote--on{color:var(--accent);border-color:var(--accent)}.request-vote:disabled{cursor:default;opacity:.6}.request-body{flex:1 1 auto;min-width:0}.request-topic{font-weight:600}.request-note{color:var(--text-dim);font-size:.9rem;margin-top:.15rem;white-space:pre-wrap}.request-actions{display:flex;gap:.4rem}.site-footer{border-top:1px solid var(--border);margin-top:4rem;padding:1.25rem 0 2.5rem;color:var(--text-faint);font-size:.85rem}.site-footer .inner{max-width:1280px;margin:0 auto;padding:0 1.25rem;display:flex;gap:1.25rem}.site-footer a{color:var(--text-dim)}.request--done{opacity:.55}.request--new{border-color:var(--accent)}body.feedback-open{padding-right:400px;transition:padding-right .16s ease-out}@media (max-width:640px){body.feedback-open{padding-right:0}}@media (prefers-reduced-motion:reduce){body.feedback-open{transition:none}}.feedback-drawer{position:fixed;top:0;right:0;bottom:0;width:min(400px,100vw);z-index:40;overflow-y:auto;padding:1rem 1.25rem 2rem;background:var(--bg-elev);border-left:1px solid var(--border);box-shadow:-18px 0 40px rgba(0,0,0,.45);animation:feedback-in .16s ease-out}@keyframes feedback-in{0%{transform:translateX(1.5rem);opacity:0}}@media (prefers-reduced-motion:reduce){.feedback-drawer{animation:none}}.feedback-drawer-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border)}.feedback-drawer-from{margin:.6rem 0 .2rem;word-break:break-all}.feedback-drawer .request-form{margin-top:.75rem}@media (max-width:640px){.feedback-drawer{top:auto;height:70vh;width:100vw;border-left:0;border-top:1px solid var(--border);border-radius:var(--radius) var(--radius) 0 0}}.footer-link{background:none;border:0;padding:0;font:inherit;color:var(--text-dim);cursor:pointer}.footer-link:hover{color:var(--text);text-decoration:underline}.requests{max-width:var(--measure)}.feedback-drawer .requests{max-width:none}.feedback-drawer-title{font-weight:600}.drawer-close{background:none;border:0;color:var(--text-dim);font-size:1.4rem;line-height:1;padding:0 .25rem;cursor:pointer}.drawer-close:hover{color:var(--text)}.page-preview{max-height:4.5em;overflow:hidden;opacity:.8;white-space:pre-wrap}.user-uid{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.7rem;opacity:.7}