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@font-face{font-family:'JetBrains Mono';src:url(assets/fonts/jetbrains-mono-latin-ext.woff2) format('woff2');font-weight:100 800;font-style:normal;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
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:root{--bg:#0e1116;--panel:#141922;--panel2:#0f141c;--fg:#c9d3dd;--muted:#9aa0ac;--muted2:#828a96;--dim:#7f8b96;--line:#232b36;--line2:rgba(140,142,152,.22);--mint:#22d3a3;--gold:#e0b56e;--accent:#22d3a3;--pl-analysis:#22d3a3;--pl-canvas:#e0b56e;--pl-transition:#7fb2ff;--pl-app:#c98fff;--ease:cubic-bezier(.4,0,.2,1);--shadow:0 1px 2px rgba(0,0,0,.34),0 10px 30px rgba(0,0,0,.20);--radius:12px;--sans:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;--mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;--display:'Fraunces',Georgia,'Times New Roman',serif;--maxw:760px}
:root[data-theme=light]{--bg:#fbfcfe;--panel:#fff;--panel2:#f4f6fa;--fg:#1f2733;--muted:#5a6472;--muted2:#6b7280;--dim:#8a94a2;--line:#e4e8ee;--line2:#e4e8ee}
@media(prefers-color-scheme:light){:root:not([data-theme=dark]){--bg:#fbfcfe;--panel:#fff;--panel2:#f4f6fa;--fg:#1f2733;--muted:#5a6472;--muted2:#6b7280;--dim:#8a94a2;--line:#e4e8ee;--line2:#e4e8ee}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--fg);font:400 16px/1.65 var(--sans);-webkit-font-smoothing:antialiased}
a{color:var(--mint);text-decoration:none}a:hover{text-decoration:underline}
/* top nav */
.top{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:22px;height:56px;padding:0 22px;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{font:700 16px/1 var(--sans);color:var(--fg);letter-spacing:-.01em}.brand:hover{text-decoration:none;color:var(--mint)}
.topnav{display:flex;gap:20px;margin-left:6px}
.topnav a{color:var(--muted);font-weight:500;font-size:14.5px;padding:4px 0;border-bottom:2px solid transparent}
.topnav a:hover{color:var(--fg);text-decoration:none}
.topnav a[aria-current]{color:var(--fg);border-bottom-color:var(--accent)}
.theme{margin-left:auto;background:none;border:1px solid var(--line);color:var(--muted);width:32px;height:32px;border-radius:8px;cursor:pointer;font-size:15px}
.theme:hover{color:var(--fg);border-color:var(--line2)}
.burger{display:none;background:none;border:1px solid var(--line);color:var(--muted);width:32px;height:32px;border-radius:8px;cursor:pointer}
/* frame: sidebar | main | on-this-page */
.frame{display:grid;grid-template-columns:270px minmax(0,1fr) 210px;gap:0;max-width:1340px;margin:0 auto;align-items:start}
.shell-landing .frame{grid-template-columns:1fr;max-width:none}
.side{position:sticky;top:56px;max-height:calc(100vh - 56px);overflow:auto;padding:26px 14px 40px 22px;border-right:1px solid var(--line);font-size:14px}
.side-head{font:600 11px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--muted2);margin:0 0 12px 8px}
.side nav ul,.side nav ol{list-style:none;margin:0;padding:0}
.guidenav>li>a,.side .grp li>a{display:flex;gap:8px;align-items:baseline;padding:5px 9px;border-radius:8px;color:var(--muted);font-weight:450}
.guidenav .n{color:var(--accent);font:600 12px var(--mono);opacity:.7;min-width:16px;text-align:right}
.guidenav>li>a:hover,.side .grp li>a:hover{color:var(--fg);background:color-mix(in srgb,var(--fg) 5%,transparent);text-decoration:none}
.side li.cur>a{color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);font-weight:600}
.side .grp{margin:0 0 16px}.side .grp h4{margin:14px 0 5px 9px;font:600 10.5px var(--mono);letter-spacing:.13em;text-transform:uppercase;color:var(--accent);opacity:.85}
.subnav{margin:2px 0 6px 26px !important;padding-left:9px !important;border-left:1px solid var(--line2)}
.subnav a{display:block;padding:3px 8px;color:var(--dim);font-size:13px;border-radius:6px}
.subnav a:hover{color:var(--fg);text-decoration:none}.subnav a.here{color:var(--accent)}
/* main */
main{min-width:0;padding:40px 46px 80px;max-width:calc(var(--maxw) + 92px)}
.shell-landing main{max-width:1100px;margin:0 auto;padding:0 26px 80px}
main h1{font:600 40px/1.14 var(--display);letter-spacing:-.01em;margin:.1em 0 .55em;color:var(--fg);text-wrap:balance}
main h2{font:700 23px/1.3 var(--sans);letter-spacing:-.012em;margin:2.4em 0 .6em;padding-top:.55em;border-top:1px solid var(--line);color:var(--fg);text-wrap:balance}
main h3{font:650 17.5px var(--sans);letter-spacing:-.006em;margin:1.8em 0 .5em;color:var(--fg)}
main h4{font:600 15px var(--sans);margin:1.4em 0 .4em;color:var(--muted)}
main p,main li{color:var(--fg)}main li{margin:.25em 0}
main strong{color:var(--fg);font-weight:650}
.anchor{float:left;margin-left:-.9em;padding-right:.3em;color:transparent;font-weight:400}
h1:hover .anchor,h2:hover .anchor,h3:hover .anchor{color:var(--line2)}
blockquote{margin:1.2em 0;padding:.5em 1.1em;border-left:3px solid var(--accent);background:color-mix(in srgb,var(--accent) 5%,transparent);border-radius:0 8px 8px 0;color:var(--muted)}
code{font:.9em var(--mono);background:color-mix(in srgb,var(--fg) 8%,transparent);padding:.1em .35em;border-radius:5px}
.fence{position:relative;margin:1.2em 0}
.fence pre{margin:0;overflow:auto;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:16px 18px}
.fence code{background:none;padding:0;font-size:13.5px;line-height:1.6;color:var(--fg)}
.fence-badge{position:absolute;top:8px;right:12px;font:600 9.5px var(--mono);letter-spacing:.12em;color:var(--mint);opacity:.5}
.c-com{color:var(--muted2);font-style:italic}.c-str{color:#9ad1b0}.c-num{color:var(--gold)}.c-kw{color:var(--mint)}.c-err{color:#d98a94}
table{border-collapse:collapse;width:100%;margin:1.2em 0;font-size:14.5px;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:7px 11px;text-align:left;vertical-align:top}
th{background:var(--panel);font-weight:600;color:var(--fg)}
.fig{margin:1.6em 0;text-align:center}.fig img{max-width:100%;height:auto;border-radius:8px}
main em+em{}
.prevnext{display:flex;justify-content:space-between;gap:16px;margin-top:56px;padding-top:22px;border-top:1px solid var(--line)}
.pn{display:flex;flex-direction:column;gap:2px;padding:12px 16px;border:1px solid var(--line);border-radius:10px;max-width:46%;color:var(--muted)}
.pn:hover{border-color:var(--accent);text-decoration:none}.pn.next{text-align:right;margin-left:auto}
.pn span{font-size:12px;color:var(--dim)}.pn b{color:var(--fg);font-weight:600}
.onthis{position:sticky;top:56px;max-height:calc(100vh - 56px);overflow:auto;padding:34px 18px;font-size:13px}
.onthis h5{margin:0 0 8px;font:600 10.5px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted2)}
.onthis ul{list-style:none;margin:0;padding:0}.onthis a{display:block;padding:3px 0;color:var(--dim)}
.onthis a:hover,.onthis a.here{color:var(--accent);text-decoration:none}
@media(max-width:1100px){.frame{grid-template-columns:250px minmax(0,1fr)}.onthis{display:none}}
@media(max-width:820px){.frame{grid-template-columns:1fr}.side{position:fixed;left:0;top:56px;bottom:0;width:280px;background:var(--bg);border-right:1px solid var(--line);transform:translateX(-102%);transition:transform .2s;z-index:30}body.nav-open .side{transform:none}.burger{display:block}main{padding:28px 20px 70px}}
/* ── design uplift: hero + motion ── */
.shell-landing main>h1{font-size:64px;line-height:1.02;letter-spacing:-.022em;margin:.15em 0 .3em}
.shell-landing main>h1+p{font-size:19px;line-height:1.55;color:var(--fg);max-width:66ch;margin-bottom:1.4em}
.shell-landing main>h1+p+p{margin:1.3em 0 2.4em;font-size:15.5px}
a,.topnav a,.side .grp li>a,.guidenav>li>a,.pn,.theme,.burger,.brand{transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease)}
.fence:hover .fence-badge{opacity:.85}
@media(min-width:900px){.shell-landing main>h1{font-size:72px}}
/* ── live Flux demo islands (WS5): source | live chart the engine compiles in-browser ── */
.flux-demo{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);margin:1.8em 0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel2);box-shadow:var(--shadow)}
.flux-demo-code{border-right:1px solid var(--line);position:relative;min-width:0;display:flex;flex-direction:column}
.flux-demo-code .fence-badge{position:absolute;top:9px;right:12px;z-index:2;font:600 9.5px var(--mono);letter-spacing:.12em;color:var(--mint);opacity:.55}
.flux-demo-code .fence-badge em{font-style:normal;color:var(--muted2)}
/* editable code: a transparent textarea rides exactly over a syntax-highlighted <pre>; typing
   re-highlights + recompiles. Both layers share identical metrics + pre-wrap, so nothing scrolls. */
.flux-ed{position:relative;flex:1 0 auto;min-width:0}
.flux-ed-hl,.flux-ed-ta{margin:0;padding:18px;border:0;font:13px/1.7 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;tab-size:2;-moz-tab-size:2;letter-spacing:0}
.flux-ed-hl{color:var(--fg);background:transparent;min-height:100%;pointer-events:none}
.flux-ed-hl code{background:none;padding:0;font:inherit;color:inherit;white-space:inherit}
.flux-ed-ta{position:absolute;inset:0;width:100%;height:100%;background:transparent;color:transparent;-webkit-text-fill-color:transparent;caret-color:var(--accent);resize:none;outline:none;overflow:hidden}
.flux-ed-ta::selection{background:color-mix(in srgb,var(--accent) 30%,transparent)}
.flux-demo-code:focus-within{box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--accent) 42%,transparent)}
.flux-ed-status{margin:0;padding:7px 14px;font:600 10.5px var(--mono);letter-spacing:.06em;border-top:1px solid var(--line);color:var(--dim);min-height:1.7em}
.flux-ed-status.ok{color:var(--accent)}
.flux-ed-status.err{color:var(--gold)}
/* the controls Flux DERIVES from input(…) — a live slider per numeric knob, below the chart */
.flux-ctrls{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;padding:10px 14px;border-top:1px solid var(--line);background:var(--panel2)}
.flux-ctrls[hidden]{display:none}
.flux-ctrl{display:flex;align-items:center;gap:8px;font:600 10.5px var(--mono);letter-spacing:.04em;color:var(--muted2)}
.flux-ctrl-nm{color:var(--mint)}
.flux-ctrl input[type=range]{accent-color:var(--accent);width:108px;height:16px;cursor:ew-resize}
.flux-ctrl-vv{min-width:2.4em;color:var(--fg);font-variant-numeric:tabular-nums}
.flux-demo-stage{position:relative;display:flex;flex-direction:column;min-width:0}
.flux-demo-badge{display:flex;align-items:center;gap:7px;padding:9px 14px;font:600 10px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted2);border-bottom:1px solid var(--line)}
.flux-demo-badge .dot{width:7px;height:7px;border-radius:50%;background:currentColor}
.flux-demo[data-flux-live] .flux-demo-badge{color:var(--accent)}
.flux-demo[data-flux-live] .flux-demo-badge .dot{box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 20%,transparent)}
.flux-demo-canvas{position:relative;height:400px;overflow:hidden;contain:strict}
.flux-demo-fallback{margin:0;padding:10px 14px;font-size:12px;color:var(--dim);border-top:1px solid var(--line)}
.flux-demo[data-flux-live] .flux-demo-fallback{display:none}
/* scene demos: a data-space overlay reads against the live price axis, on a soft accent glow */
.flux-demo[data-kind=scene] .flux-demo-canvas{background:radial-gradient(circle at 50% 40%,color-mix(in srgb,var(--accent) 6%,transparent),transparent 72%)}
/* honestly-badged designed-but-not-runnable code (APP plane, etc.) */
.fence-staged{border-color:color-mix(in srgb,var(--gold) 32%,var(--line))}
.fence-staged .fence-badge{color:var(--gold);opacity:.9}
@media(max-width:860px){.flux-demo{grid-template-columns:1fr}.flux-demo-code{border-right:0;border-bottom:1px solid var(--line)}}
@media(prefers-reduced-motion:reduce){*{transition:none !important;animation:none !important}}