:root {
  --paper: #fbfaf7;
  --ink: #191817;
  --card: #ffffff;
  --line: #ebe8e1;
  --line-strong: #d9d5cc;
  --muted: #6f6b64;
  --faint: #a8a39a;
  --blue: #0a3dff;
  --blue-soft: rgba(10, 61, 255, 0.1);
  --grey-mark: #9b968d;
  --hl: #fff3a3;
  --ok: #1d7a3e;
  --warn: #9a6200;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "Geist", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --col: 680px;
  --wide: 980px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #111110;
    --ink: #ecebe7;
    --card: #1a1918;
    --line: #2a2826;
    --line-strong: #3a3835;
    --muted: #a19c94;
    --faint: #6f6b64;
    --blue: #7d96ff;
    --blue-soft: rgba(125, 150, 255, 0.14);
    --grey-mark: #77736c;
    --hl: #4a4220;
    --ok: #5cc985;
    --warn: #e0a54a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #111110;
  --ink: #ecebe7;
  --card: #1a1918;
  --line: #2a2826;
  --line-strong: #3a3835;
  --muted: #a19c94;
  --faint: #6f6b64;
  --blue: #7d96ff;
  --blue-soft: rgba(125, 150, 255, 0.14);
  --grey-mark: #77736c;
  --hl: #4a4220;
  --ok: #5cc985;
  --warn: #e0a54a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--blue); color: var(--paper); }
a { color: inherit; text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 3px; transition: text-decoration-color 0.18s, color 0.18s; }
a:hover { color: var(--blue); text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: 3px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: var(--card); padding: 8px 12px; z-index: 10; }

/* Layout: one calm column, wide figures break out of it. */
.masthead, main > * { width: min(var(--col), calc(100% - 32px)); margin-left: auto; margin-right: auto; }
main > .wide, .wide { width: min(var(--wide), calc(100% - 32px)); }
section > .wide { width: min(var(--wide), calc(100vw - 32px)); margin-left: calc((100% - min(var(--wide), calc(100vw - 32px))) / 2); margin-right: 0; }

/* Masthead */
.masthead { padding: 72px 0 28px; }
.kicker { font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(44px, 9vw, 84px); line-height: 0.98; letter-spacing: -0.015em; margin: 14px 0 14px; }
.subtitle { font-family: var(--serif); font-style: italic; font-size: clamp(22px, 3.6vw, 30px); line-height: 1.25; margin: 0 0 22px; color: var(--ink); }
.byline { margin: 0; color: var(--muted); font-size: 15px; }
.byline .author { color: var(--ink); font-weight: 500; }
.byline .sep { margin: 0 6px; color: var(--faint); }
.chips { list-style: none; padding: 0; margin: 20px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { font-family: var(--mono); font-size: 12px; padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--card); }
.chip-done { display: inline-flex; align-items: center; gap: 7px; color: var(--ink) !important; }
.dot.dot-done { background: var(--ok); animation: none; }
.chip-live { display: inline-flex; align-items: center; gap: 7px; color: var(--ink) !important; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--warn); display: inline-block; box-shadow: 0 0 0 0 var(--warn); animation: pulse 2s infinite; flex: none; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--warn) 60%, transparent); } 70% { box-shadow: 0 0 0 7px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

/* Typography */
h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(30px, 5vw, 40px); line-height: 1.1; margin: 72px 0 18px; letter-spacing: -0.01em; display: flex; align-items: baseline; gap: 14px; }
h2 .num { font-family: var(--mono); font-size: 13px; color: var(--muted); letter-spacing: 0; min-width: 18px; }
h3 { font-size: 18px; font-weight: 600; margin: 40px 0 8px; letter-spacing: -0.005em; }
p { margin: 0 0 1.05em; }
ul, ol { padding-left: 1.2em; margin: 0 0 1.1em; }
li { margin: 0.35em 0; }
em { font-style: italic; }
b, strong { font-weight: 600; }
mark { background: var(--hl); color: inherit; padding: 0 2px; border-radius: 2px; }
.cite { font-family: var(--mono); font-size: 0.72em; vertical-align: 0.35em; text-decoration: none; color: var(--blue); margin-left: 1px; white-space: nowrap; }
.cite:hover { text-decoration: underline; }

/* Hero figure */
.hero { margin: 24px auto 40px; }
.hero-inner { display: grid; grid-template-columns: 1fr; gap: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
@media (min-width: 860px) { .hero-inner { grid-template-columns: 1fr 1.05fr; padding: 30px; gap: 34px; align-items: center; } }
.hero-q { font-family: var(--serif); font-size: 23px; line-height: 1.3; margin: 0 0 18px; }
.hero-q b { font-weight: 400; color: var(--blue); font-style: italic; }
.hero-asks { display: grid; gap: 16px; margin-bottom: 20px; }
.ask { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; align-items: center; }
.ask-label { grid-column: 1 / -1; font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); }
.ask-text { grid-column: 1 / -1; font-size: 15px; line-height: 1.4; }
.meter { position: relative; height: 10px; background: var(--line); border-radius: 999px; overflow: hidden; }
.meter { overflow: visible; }
.meter::after { content: ""; position: absolute; top: -4px; bottom: -4px; width: 0; border-left: 1.5px dashed var(--ink); left: 50%; opacity: 0.55; }
.meter-fill { height: 100%; width: 0; background: var(--blue); border-radius: 999px; transition: width 0.9s var(--ease), background-color 0.4s; }
.meter.off .meter-fill { background: var(--grey-mark); }
.ask-val { font-family: var(--mono); font-size: 13px; min-width: 120px; text-align: right; color: var(--muted); }
.ask-val b { color: var(--ink); font-weight: 500; }
.switch { display: inline-flex; align-items: center; gap: 12px; background: none; border: 1px solid var(--line-strong); color: var(--ink); border-radius: 999px; padding: 8px 16px 8px 8px; font: inherit; font-size: 15px; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.switch:hover { border-color: var(--blue); }
.switch-track { width: 40px; height: 22px; border-radius: 999px; background: var(--blue); position: relative; transition: background 0.3s; flex: none; }
.switch-knob { position: absolute; top: 3px; left: 21px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: left 0.3s var(--ease); }
.switch[aria-pressed="true"] .switch-track { background: var(--grey-mark); }
.switch[aria-pressed="true"] .switch-knob { left: 3px; }
.hero-grid svg { display: block; width: 100%; height: auto; }
figcaption { font-size: 14px; line-height: 1.55; color: var(--muted); margin-top: 12px; }
figcaption b { color: var(--ink); font-weight: 600; }
.caption-like { font-size: 14px; color: var(--muted); margin-top: -4px; }

/* Short version */
.tldr { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 6px 24px 10px; margin-top: 8px; }
.tldr h2 { margin: 18px 0 8px; font-size: 26px; }
.tldr ul { padding-left: 1.1em; }
.tldr li { margin: 0.55em 0; }

/* Stat tiles */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; margin: 32px auto; }
@media (min-width: 760px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { background: var(--paper); padding: 20px 18px; display: flex; flex-direction: column; gap: 6px; }
.stat-num { font-family: var(--serif); font-size: 44px; line-height: 1; font-variant-numeric: tabular-nums; }
.stat-num.accent { color: var(--blue); }
.stat-lab { font-size: 13.5px; line-height: 1.4; color: var(--muted); }
.stat-lab small { display: block; font-size: 12px; color: var(--faint); }

/* Contents */
.toc { margin-top: 8px; }
.toc details { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 10px 0; }
.toc summary { cursor: pointer; font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); list-style: none; }
.toc summary::-webkit-details-marker { display: none; }
.toc summary::before { content: "+ "; }
.toc details[open] summary::before { content: "– "; }
.toc ol { columns: 2; column-gap: 32px; margin: 10px 0 4px; font-size: 15px; }
@media (max-width: 560px) { .toc ol { columns: 1; } }
.toc a { text-decoration: none; }

.abstract { border-left: 2px solid var(--blue); padding-left: 20px; margin-top: 48px; }
.abstract h2 { margin-top: 0; font-size: 26px; }
.abstract p { font-size: 16px; }

blockquote.pull { font-family: var(--serif); font-size: 27px; line-height: 1.28; margin: 28px 0; padding: 0 0 0 20px; border-left: 2px solid var(--blue); }

.tech { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin: 16px 0 24px; font-size: 14.5px; line-height: 1.6; }
.tech-h { font-family: var(--mono); font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); margin: 0 0 6px; }
.tech p:last-child { margin-bottom: 0; }

.prompts { display: grid; grid-template-columns: 1fr; gap: 14px; margin: 22px auto 12px; }
@media (min-width: 820px) { .prompts { grid-template-columns: 1fr 1fr; } }
.prompt-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; min-width: 0; }
.prompt-tag { font-family: var(--mono); font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--blue); }
.prompt-card pre { white-space: pre-wrap; word-break: break-word; font-family: var(--mono); font-size: 12.5px; line-height: 1.6; margin: 8px 0 0; color: var(--ink); }

/* Charts */
.chart, .mini, .explorer { margin: 26px auto 30px; }
.chart svg, .mini svg { display: block; overflow: visible; }
.chart-body { width: 100%; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 3px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); margin-bottom: 12px; }
.seg button { font: inherit; font-size: 13px; padding: 5px 12px; border-radius: 999px; border: 0; background: none; color: var(--muted); cursor: pointer; transition: background 0.18s, color 0.18s; }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.seg button:hover:not([aria-pressed="true"]) { color: var(--ink); }
svg text { font-family: var(--sans); fill: var(--muted); font-size: 12px; }
svg .t-ink { fill: var(--ink); }
svg .t-blue { fill: var(--blue); }
svg .t-mono { font-family: var(--mono); font-size: 11px; }
svg .t-title { font-size: 13px; font-weight: 500; fill: var(--ink); }
svg .axis line, svg .grid line { stroke: var(--line); }
svg .axis path { stroke: none; }
svg .chance { stroke: var(--muted); stroke-dasharray: 3 4; }
svg .band { fill: var(--blue-soft); }
svg .f-blue { fill: var(--blue); }
svg .s-blue { stroke: var(--blue); }
svg .f-grey { fill: var(--grey-mark); }
svg .s-grey { stroke: var(--grey-mark); }
svg .f-ink { fill: var(--ink); }
svg .s-ink { stroke: var(--ink); }
svg .f-line { fill: var(--line); }
svg .hover-target { cursor: default; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 13px; color: var(--muted); margin: 0 0 8px; }
.legend span { display: inline-flex; align-items: center; gap: 7px; }
.legend i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.legend i.l-blue { background: var(--blue); }
.legend i.l-grey { background: var(--grey-mark); }
.legend i.l-ink { background: var(--ink); }
.legend i.l-dash { width: 16px; height: 0; border-top: 2px dashed var(--muted); border-radius: 0; }

.tip { position: fixed; z-index: 20; pointer-events: none; background: var(--ink); color: var(--paper); font-size: 12.5px; line-height: 1.45; padding: 7px 10px; border-radius: 8px; max-width: 260px; opacity: 0; transform: translateY(4px); transition: opacity 0.15s, transform 0.15s; }
.tip.on { opacity: 1; transform: none; }
.tip b { font-weight: 600; }

/* AUROC mini explainer */
.mini { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.mini-controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 14px; margin-top: 8px; }
.mini-controls input[type="range"] { flex: 1; min-width: 160px; accent-color: var(--blue); }
.mini-out { font-family: var(--mono); font-size: 13px; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 22px auto 28px; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
caption { caption-side: top; text-align: left; font-size: 14px; color: var(--muted); padding-bottom: 10px; line-height: 1.5; }
caption b { color: var(--ink); }
th { text-align: left; font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--ink); white-space: nowrap; }
td { padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
td.n, th.n { text-align: right; }
td.n { font-family: var(--mono); font-size: 13px; white-space: nowrap; }
td.ci { color: var(--muted); }
tr.hl td { background: var(--blue-soft); }
tr.hl td:first-child { box-shadow: inset 2px 0 0 var(--blue); }
tr.sub td { color: var(--muted); font-style: italic; }
tr.pending td { color: var(--muted); }
tbody tr { transition: background 0.15s; }
tbody tr:hover td { background: color-mix(in srgb, var(--line) 45%, transparent); }
.ok, .wait { font-family: var(--mono); font-size: 12px; padding: 2px 8px; border-radius: 999px; }
.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 12%, transparent); }
.wait { color: var(--warn); background: color-mix(in srgb, var(--warn) 14%, transparent); }
table.kv th { text-transform: none; letter-spacing: 0; font-size: 14px; color: var(--ink); border-bottom: 1px solid var(--line); width: 34%; vertical-align: top; white-space: normal; }
table.kv td { font-size: 14px; }
td.heat { text-align: right; font-family: var(--mono); font-size: 12.5px; }

/* Explorer */
.explorer { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.ex-pick { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.ex-pick button { font: inherit; font-size: 13px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); padding: 4px 10px; border-radius: 999px; cursor: pointer; transition: border-color 0.15s, background 0.15s, color 0.15s; }
.ex-pick button:hover { border-color: var(--blue); }
.ex-pick button[aria-pressed="true"] { background: var(--blue); border-color: var(--blue); color: #fff; }
.ex-body { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 820px) { .ex-body { grid-template-columns: 1fr 1.25fr; } }
.ex-words { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 12px; }
.ex-words span { font-family: var(--mono); font-size: 12.5px; padding: 3px 8px; border-radius: 6px; background: var(--paper); border: 1px solid var(--line); }
.ex-words span.inj { background: var(--blue); color: #fff; border-color: var(--blue); }
.ex-sub { font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin: 0 0 4px; }
.ex-opts { display: grid; gap: 8px; }
.ex-opt { display: grid; grid-template-columns: 22px 1fr 1fr; gap: 8px; align-items: center; font-size: 14px; }
.ex-opt .bar { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.ex-opt .bar i { display: block; height: 100%; background: var(--grey-mark); border-radius: 999px; width: 0; transition: width 0.7s var(--ease); }
.ex-opt.is-target .bar i { background: var(--blue); }
.ex-opt.is-target .w { color: var(--blue); font-weight: 600; }
.ex-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.ex-col h4 { margin: 0 0 8px; font-size: 13px; font-weight: 600; }
.ex-yes { font-family: var(--mono); font-size: 13px; margin-top: 10px; color: var(--muted); }
.ex-yes b { color: var(--ink); font-weight: 500; }
.ex-note { font-size: 13.5px; color: var(--muted); margin: 14px 0 0; }

.journey-list li { margin: 0.7em 0; }

.callout { border: 1px solid color-mix(in srgb, var(--warn) 45%, var(--line)); background: color-mix(in srgb, var(--warn) 6%, var(--card)); border-radius: 14px; padding: 18px 22px 6px; margin: 18px 0 28px; }
.callout-h { display: flex; align-items: center; gap: 10px; font-weight: 600; margin-bottom: 10px; }
.callout-status { font-family: var(--mono); font-size: 13px; color: var(--warn); }
.callout-done { border-color: color-mix(in srgb, var(--ok) 45%, var(--line)); background: color-mix(in srgb, var(--ok) 6%, var(--card)); }
.callout-done .callout-status { color: var(--ok); }

.glossary dt { font-weight: 600; margin-top: 14px; }
.glossary dd { margin: 2px 0 0; color: var(--ink); }

.downloads { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.downloads li { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; padding: 10px 0; border-bottom: 1px solid var(--line); margin: 0; }
.downloads a { font-family: var(--mono); font-size: 14px; }
.downloads span { color: var(--muted); font-size: 14px; }

.bib { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.bib pre { margin: 0; font-family: var(--mono); font-size: 12.5px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.copy { position: absolute; top: 10px; right: 10px; font: inherit; font-size: 12px; border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: 999px; padding: 3px 10px; cursor: pointer; }
.copy:hover { border-color: var(--blue); }

.refs { padding-left: 1.6em; font-size: 14.5px; line-height: 1.55; }
.refs li { margin: 0.7em 0; }
.refs li:target { background: var(--hl); border-radius: 4px; }
.refs .ref-url { word-break: break-all; color: var(--muted); }

.foot { border-top: 1px solid var(--line); margin-top: 72px; padding: 24px 0 64px; font-size: 14px; color: var(--muted); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .meter-fill, .ex-opt .bar i, .switch-knob, .switch-track { transition: none; }
  .dot { animation: none; }
}

@media print {
  body { font-size: 11pt; background: #fff; color: #000; }
  .chips, .toc, .switch, .seg, .copy, .skip, .tip { display: none !important; }
  .reveal { opacity: 1; transform: none; }
  h2 { break-after: avoid; }
  figure, table { break-inside: avoid; }
  a { text-decoration: none; }
}