:root {
  color-scheme: light;
  --bg: #f4f5f2; --surface: #fcfcfb; --ink: #0b0b0b; --ink-2: #52514e; --muted: #6f6d68;
  --line: #e1e0d9; --axis: #c3c2b7; --wash: #eeede8; --ring: rgba(11,11,11,0.10);
  --accent: #1f4e9a;
  --series-a: #2a78d6; --series-b: #eb6834; --series-d: #4a3aa7;
  --edge: #9a988f; --edge-lag: #4a3aa7; --hi: #2a78d6;
  --serif: "Young Serif", Georgia, serif;
  --sans: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d0d0d; --surface: #1a1a19; --ink: #ffffff; --ink-2: #c3c2b7; --muted: #9a988f;
    --line: #2c2c2a; --axis: #383835; --wash: #242422; --ring: rgba(255,255,255,0.10);
    --accent: #7ea2ff;
    --series-a: #3987e5; --series-b: #d95926; --series-d: #9085e9;
    --edge: #6f6d68; --edge-lag: #9085e9; --hi: #3987e5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d0d0d; --surface: #1a1a19; --ink: #ffffff; --ink-2: #c3c2b7; --muted: #9a988f;
  --line: #2c2c2a; --axis: #383835; --wash: #242422; --ring: rgba(255,255,255,0.10);
  --accent: #7ea2ff;
  --series-a: #3987e5; --series-b: #d95926; --series-d: #9085e9;
  --edge: #6f6d68; --edge-lag: #9085e9; --hi: #3987e5;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 14px/1.5 var(--sans); }
a { color: var(--accent); }
h1, h2, h3 { font-weight: 600; }
.top { display: flex; gap: 16px; align-items: flex-start; justify-content: space-between; padding: 20px 16px 4px; max-width: 1500px; margin: 0 auto; }
.top h1 { margin: 0; font: 400 28px/1.15 var(--serif); letter-spacing: -0.01em; }
.lede { margin: 6px 0 0; color: var(--ink-2); max-width: 78ch; }
.credit { margin: 6px 0 0; font-size: 13px; color: var(--ink-2); max-width: 100ch; }
.badge { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.03em; padding: 1px 7px; margin-right: 4px; border-radius: 999px; background: var(--accent); color: var(--surface); vertical-align: 1px; }
.hero { max-width: 1500px; margin: 0 auto; padding: 14px 16px 4px; }
.presets { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.eyebrow { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-right: 6px; }
.chip { border-radius: 999px; padding: 5px 12px; background: var(--surface); border-color: var(--axis); }
.chip[aria-checked=true] { background: var(--ink); border-color: var(--ink); color: var(--bg); font-weight: 600; }
#question { margin: 14px 0 12px; font: 400 24px/1.25 var(--serif); letter-spacing: -0.01em; max-width: 60ch; }
.cards { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 10px; align-items: stretch; }
.vs { align-self: center; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.card { background: var(--surface); border: 1px solid var(--ring); border-top: 3px solid; border-radius: 10px; padding: 10px 14px; }
.card-a { border-top-color: var(--series-a); }
.card-b { border-top-color: var(--series-b); }
.card-name { font-weight: 600; font-size: 15px; display: flex; gap: 8px; align-items: center; }
.card .tag { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 5px; color: #fff; font-size: 12px; }
.card-a .tag { background: var(--series-a); }
.card-b .tag { background: var(--series-b); }
.card p { margin: 6px 0; color: var(--ink-2); }
.facts { margin: 6px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 4px; }
.facts li { font-size: 12px; color: var(--muted); background: var(--wash); border-radius: 5px; padding: 1px 7px; }
.facts li.differs { color: var(--ink); background: transparent; box-shadow: inset 0 0 0 1.5px currentColor; font-weight: 600; }
.answer { margin-top: 12px; background: var(--surface); border: 1px solid var(--ring); border-left: 4px solid var(--series-d); border-radius: 10px; padding: 12px 16px; transition: opacity 0.15s; min-height: 92px; }
.answer.stale { opacity: 0.45; }
.answer .big { font: 400 32px/1.1 var(--serif); color: var(--series-d); font-variant-numeric: tabular-nums; }
.answer .big .unit { font: 500 15px var(--sans); color: var(--ink-2); }
.answer p { margin: 6px 0 0; max-width: 95ch; font-size: 15px; }
.answer p.def { font-size: 12px; color: var(--muted); }
@media (max-width: 720px) { .cards { grid-template-columns: minmax(0, 1fr); } .vs { justify-self: center; } #question { font-size: 20px; } }
.layout { padding: 12px 16px 24px; max-width: 1500px; margin: 0 auto; }
.panel { background: var(--surface); border: 1px solid var(--ring); border-radius: 10px; padding: 12px 14px; }
details > summary { cursor: pointer; color: var(--ink-2); list-style: none; }
details > summary::-webkit-details-marker { display: none; }
details > summary::before { content: "›"; display: inline-block; width: 14px; transition: transform 0.15s; }
details[open] > summary::before { transform: rotate(90deg); }
.customize { margin-top: 10px; padding: 8px 14px; }
.customize > summary { font-size: 13px; font-weight: 600; }
.customize-body { display: grid; grid-template-columns: minmax(0, 640px) minmax(0, 360px); gap: 24px; padding: 10px 0 6px; }
@media (max-width: 960px) { .customize-body { grid-template-columns: minmax(0, 1fr); } }
.hero > .status { margin: 6px 2px 0; }
details.more { margin-top: 12px; }
details.more > summary { font-size: 13px; padding: 6px 0; }
details.more .charts { margin-top: 8px; }
.legend details { margin-top: 4px; }
.legend details p { margin-top: 4px; }
.panel h2 { margin: 0 0 8px; font-size: 13px; color: var(--ink-2); }
.panel h3 { margin: 12px 0 6px; font-size: 13px; }
.panel h3:first-child { margin-top: 0; }
label { display: block; font-size: 12px; color: var(--ink-2); }
input[type=number], input[type=text], input[type=url], input[type=date], textarea {
  width: 100%; padding: 4px 6px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); font: inherit; font-size: 13px;
}
textarea { resize: vertical; min-height: 40px; }
input:focus-visible, button:focus-visible, textarea:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { font: inherit; font-size: 13px; padding: 5px 10px; border-radius: 6px; border: 1px solid var(--line); background: var(--wash); color: var(--ink); cursor: pointer; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--surface); }
button.ghost { background: transparent; }
button:disabled { opacity: 0.5; cursor: default; }
.row-buttons { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.status { margin: 10px 0 0; font-size: 12px; color: var(--muted); }
.status.err { color: #d03b3b; }
.note { color: var(--ink-2); font-size: 13px; margin: 2px 0 12px; max-width: 90ch; }
.check { display: flex; gap: 6px; align-items: center; font-size: 13px; color: var(--ink); margin-bottom: 8px; }

.scen { width: 100%; border-collapse: collapse; }
.scen th { font-size: 12px; color: var(--ink-2); text-align: left; font-weight: 600; padding: 2px 4px 6px; }
.scen td { padding: 3px 4px; vertical-align: top; }
.scen td.lab { font-size: 12px; color: var(--ink-2); width: 32%; }
.scen .key { display: inline-block; width: 14px; height: 3px; border-radius: 2px; vertical-align: middle; margin-right: 5px; }
.scen .opt { display: flex; gap: 4px; align-items: center; font-size: 12px; color: var(--ink-2); margin-bottom: 3px; }
.scen .shock { display: grid; gap: 3px; }
.scen .shock label { display: grid; grid-template-columns: 42px 1fr; align-items: center; gap: 4px; font-size: 11px; }
.scen .shock input { padding: 3px 4px; }
.scen tr.group td { font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); padding-top: 10px; }

.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin-bottom: 12px; overflow-x: auto; }
.tabs button { border: 0; border-bottom: 2px solid transparent; border-radius: 0; background: none; color: var(--ink-2); padding: 8px 12px; white-space: nowrap; }
.tabs button[aria-selected=true] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }

.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; margin-bottom: 12px; }
.tile { background: var(--surface); border: 1px solid var(--ring); border-radius: 10px; padding: 10px 12px; }
.tile .k { font-size: 12px; color: var(--ink-2); }
.tile .v { font-size: 26px; font-weight: 600; margin-top: 2px; }
.tile .s { font-size: 12px; color: var(--muted); }
.legend { background: var(--surface); border: 1px solid var(--ring); border-radius: 10px; padding: 10px 14px; margin-bottom: 4px; font-size: 13px; color: var(--ink-2); }
.legend .items { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 12px; margin-bottom: 6px; }
.legend .item { display: inline-flex; align-items: center; gap: 6px; }
.legend p { margin: 0; max-width: 110ch; }
.legend i, .lkey { display: inline-block; width: 16px; height: 2px; border-radius: 1px; margin-right: 6px; vertical-align: middle; }
.legend .item i { margin-right: 0; height: 3px; }
.legend b { display: inline-block; width: 16px; height: 9px; border-radius: 2px; vertical-align: middle; opacity: 0.18; }
h2.section { font: 400 18px/1.2 var(--serif); margin: 18px 0 10px; }
.charts { display: grid; grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); gap: 12px; }
.charts.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 520px) { .charts, .charts.four { grid-template-columns: minmax(0, 1fr); } }
.chart { background: var(--surface); border: 1px solid var(--ring); border-radius: 10px; padding: 10px 12px; min-width: 0; }
.chart h3 { margin: 0; font-size: 13px; }
.chart .sub { color: var(--muted); font-size: 12px; margin: 2px 0 6px; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .readout { min-height: 18px; font-size: 12px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.axis text { fill: var(--muted); font-size: 12px; font-family: var(--sans); font-variant-numeric: tabular-nums; }
.axis.titles text { fill: var(--ink-2); font-weight: 600; font-size: 11.5px; }
.axis line, .axis path { stroke: var(--axis); }
.grid line { stroke: var(--line); }
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 12px; align-items: start; }
@media (max-width: 520px) { .split { grid-template-columns: minmax(0, 1fr); } }

table.data { border-collapse: collapse; width: 100%; font-size: 12px; }
table.data th, table.data td { text-align: left; padding: 5px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.data th { color: var(--ink-2); font-weight: 600; }
table.data td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.scroll { overflow-x: auto; }
.basis { display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; font-size: 11px; color: var(--ink-2); }
.basis svg { width: 9px; height: 9px; }
.bar-cell { min-width: 90px; width: 22%; }
table.data td.who { min-width: 210px; }
.rho { position: relative; height: 14px; }
.rho .mid { position: absolute; left: 50%; top: -2px; bottom: -2px; width: 1px; background: var(--axis); }
.rho span { position: absolute; top: 3px; height: 8px; border-radius: 2px; }

.graph-wrap { background: var(--surface); border: 1px solid var(--ring); border-radius: 10px; padding: 12px 14px 4px; }
.graph { position: relative; }
.graph svg.edges { position: absolute; left: 0; top: 0; overflow: visible; pointer-events: none; z-index: 0; }
.gband { position: relative; z-index: 1; margin-bottom: 34px; }
.gband-title { font-size: 12px; font-weight: 600; color: var(--ink-2); margin-bottom: 30px; display: flex; gap: 8px; align-items: center; }
.origin { font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 999px; background: var(--accent); color: var(--surface); }
.origin.added { background: transparent; color: var(--ink-2); box-shadow: inset 0 0 0 1px var(--axis); }
.gnodes { display: flex; flex-wrap: wrap; gap: 44px 34px; align-items: flex-start; }
.gnode.ghost.first { margin-left: auto; }
.gnode { position: relative; max-width: 100%; background: var(--surface); border: 1px solid var(--axis); border-radius: 8px; padding: 6px 9px; font-size: 12px; cursor: pointer; transition: border-color 0.12s, opacity 0.12s; }
.gnode .gl { color: var(--ink-2); font-size: 11px; margin-bottom: 2px; }
.gnode .gf { white-space: nowrap; }
@media (max-width: 640px) { .gnode .gf { overflow-x: auto; overflow-y: hidden; padding-bottom: 3px; } }
.gnode .gi { color: var(--muted); font-size: 11px; margin-top: 3px; white-space: nowrap; }
.gnode.ghost { border-style: dashed; background: var(--bg); }
.gnode.on { border-color: var(--hi); box-shadow: 0 0 0 1px var(--hi); }
.graph.focus .gnode:not(.on):not(.near) { opacity: 0.35; }
.graph.focus path.edge:not(.on) { opacity: 0.12; }
@media (max-width: 640px) { .graph:not(.focus) path.edge { opacity: 0; } .gnode.ghost.first { margin-left: 0; } }
path.edge { fill: none; stroke: var(--edge); stroke-width: 1.4; }
path.edge.lag { stroke: var(--edge-lag); }
path.edge.on { stroke: var(--hi); stroke-width: 2; }
.detail { margin-top: 12px; }
.detail .katex-display { margin: 6px 0; overflow-x: auto; overflow-y: hidden; }


.method h2 { font: 400 20px/1.2 var(--serif); margin: 18px 0 8px; }
.method h2:first-child { margin-top: 0; }
.method p, .method li { max-width: 90ch; }
.eq { background: var(--surface); border: 1px solid var(--ring); border-radius: 8px; padding: 6px 10px; margin: 6px 0; overflow-x: auto; }
.eq .lab { font-size: 12px; color: var(--ink-2); }
.pin { width: 80px !important; }

#tip { position: fixed; z-index: 30; display: none; max-width: 340px; padding: 8px 10px; border-radius: 8px; background: var(--ink); color: var(--bg); font-size: 12px; line-height: 1.45; pointer-events: none; box-shadow: 0 4px 16px rgba(0,0,0,0.25); }
#tip .row { display: flex; gap: 8px; align-items: center; }
#tip .row strong { font-variant-numeric: tabular-nums; }
footer { max-width: 1500px; margin: 0 auto; padding: 8px 16px 28px; color: var(--muted); font-size: 12px; }
footer p { max-width: 100ch; }
[data-help], [data-help-lever], [data-help-key] { text-decoration: underline dotted var(--muted); text-underline-offset: 3px; cursor: help; }