:root{--ink:#0A0E14;--surface:#10161D;--signal:#4FD8C4;--alert:#F2A65A;--text:#E7EDF2;--muted:#8A97A5;--hair:#202B35;--gutter:clamp(20px,5vw,72px);--ease:cubic-bezier(.22,.61,.36,1)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--ink);color:var(--text);font-family:IBM Plex Sans,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:clamp(15.5px,1.02vw,17px);line-height:1.72;overflow-x:hidden}h1,h2,h3{font-family:Space Grotesk,IBM Plex Sans,system-ui,sans-serif;font-weight:600;letter-spacing:-.02em;line-height:1.12;margin:0}a{color:var(--signal);text-decoration:none;border-bottom:1px solid rgba(79,216,196,.3);padding-bottom:1px;transition:border-color .2s var(--ease)}a:hover{border-bottom-color:var(--signal)}a:focus-visible,button:focus-visible,.scroll:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:2px}code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.86em;background:var(--surface);padding:1px 6px;border-radius:4px}.skip{position:absolute;left:-9999px;top:0;z-index:50;background:var(--surface);color:var(--text);padding:10px 16px}.skip:focus{left:var(--gutter);top:12px}.top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px var(--gutter);font-size:.86em}.top .home{color:var(--text);border:0;font-family:Space Grotesk,sans-serif;font-weight:500}.top .back{color:var(--muted);border-bottom-color:var(--hair)}main{max-width:1180px;margin:0 auto;padding:0 var(--gutter) 80px}.intro{padding:6vh 0 44px;max-width:760px}h1{font-size:clamp(40px,6vw,76px);font-weight:700;letter-spacing:-.03em;margin:0 0 22px}.lede{font-size:1.1em;color:var(--text);max-width:60ch;margin:0 0 30px}.note{border-left:2px solid var(--hair);padding:2px 0 2px 20px;margin:0 0 34px;max-width:64ch}.note h2{font-size:1rem;margin:0 0 8px;color:var(--text)}.note p{margin:0 0 12px;color:var(--muted);font-size:.94em}.note p:last-child{margin:0}.toc{list-style:none;margin:0 0 26px;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:2px 28px;counter-reset:w}.toc li{counter-increment:w;padding:7px 0;border-top:1px solid var(--hair)}.toc a{color:var(--text);border:0}.toc a:hover{color:var(--signal)}.legend{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 20px;font-size:.82em;color:var(--muted)}.legend li{display:flex;align-items:center;gap:8px}.legend i{width:4px;height:14px;border-radius:2px;display:block}.legend i.dash{width:16px;height:0;border-top:2px dashed #C792EA;border-radius:0}.wf{padding:64px 0 8px;border-top:1px solid var(--hair);scroll-margin-top:12px}.wf header{max-width:760px}.basis{margin:0 0 10px;color:var(--muted);font-size:.84em}.wf h2{font-size:clamp(28px,3.6vw,44px);margin:0 0 8px}.tag{margin:0 0 18px;color:var(--muted);font-size:1.02em}.chips{list-style:none;margin:0 0 22px;padding:0;display:flex;flex-wrap:wrap;gap:8px}.chips li{border:1px solid var(--hair);border-radius:999px;padding:3px 12px;font-size:.8em;color:var(--text)}.chips li.count{color:var(--muted)}.problem{max-width:70ch;margin:0 0 26px}.cols{display:grid;grid-template-columns:1fr 1fr;gap:28px 44px;margin:0 0 30px;max-width:1060px}.cols h3{font-size:.98rem;color:var(--muted);font-weight:500;font-family:IBM Plex Sans,sans-serif;margin:0 0 10px;letter-spacing:0}.cols ol,.cols ul{margin:0;padding-left:1.15em}.cols li{margin:0 0 9px;font-size:.94em;padding-left:2px}.cols li::marker{color:var(--muted)}.scroll{overflow-x:auto;border:1px solid var(--hair);border-radius:12px;background:var(--surface);padding:6px;-webkit-overflow-scrolling:touch}.diagram{display:block;width:100%;height:auto}.diagram .card{fill:#0d1218;stroke:var(--hair);stroke-width:1.2}.diagram .nm{font:500 14px IBM Plex Sans,system-ui,sans-serif;fill:var(--text)}.diagram .ty{font:400 11px IBM Plex Sans,system-ui,sans-serif;fill:var(--muted)}.diagram .olab{font:500 11px IBM Plex Sans,system-ui,sans-serif;fill:var(--muted)}.diagram .main{fill:none;stroke:#5b6b7a;stroke-width:1.6}.diagram .ai{fill:none;stroke:#c792ea;stroke-width:1.4;stroke-dasharray:5 4;opacity:.85}.diagram .node:hover .card{stroke:var(--signal)}.actions{margin:18px 0 0;display:flex;flex-wrap:wrap;gap:12px}.btn{display:inline-block;border:1px solid var(--signal);color:var(--signal);border-radius:8px;padding:9px 18px;font:500 .9rem IBM Plex Sans,sans-serif;background:transparent;cursor:pointer;transition:background-color .2s var(--ease),color .2s var(--ease)}.btn:hover{background:var(--signal);color:var(--ink)}.btn.ghost{border-color:var(--hair);color:var(--text)}.btn.ghost:hover{background:var(--surface);color:var(--text);border-color:var(--signal)}.foot{display:flex;flex-wrap:wrap;gap:8px 28px;padding:36px var(--gutter) 48px;border-top:1px solid var(--hair);font-size:.9em}@media (max-width:780px){.cols{grid-template-columns:1fr}.wf{padding-top:48px}}@media (prefers-reduced-motion:reduce){*{transition:none!important}}