/* Project page styles. Colors are tokens; charts read the same tokens. */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f2f1ed;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6f6e69;
  --axis-ink: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --border-strong: rgba(11, 11, 11, 0.18);
  --accent: #2a78d6;
  --link: #1c5cab;
  --answer-bg: #eef4fc;
  --answer-edge: #2a78d6;
  --btn-bg: #0b0b0b;
  --btn-fg: #ffffff;
  --focus: #2a78d6;

  /* categorical slots (validated: dataviz reference palette, light steps) */
  --c1: #2a78d6;  /* Voting */
  --c2: #eb6834;  /* Orch-Workers */
  --c3: #1baf7a;  /* Eval-Opt */
  --c4: #eda100;
  --c5: #e87ba4;
  --c6: #008300;
  --c7: #6250d6;
  --c8: #e34948;
  --neutral-bar: #a8a69f;
  --neutral-mark: #52514e;
  --seq-lo: #86b6ef;
  --seq-hi: #104281;

  /* schematic */
  --node-solving: #ffffff;
  --node-solving-ink: #0b0b0b;
  --node-decision: #2d2c2a;
  --node-decision-ink: #ffffff;
  --node-planning: #a8a69f;
  --node-planning-ink: #0b0b0b;
  --node-stroke: #898781;

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #222220;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #a3a29b;
    --axis-ink: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --border-strong: rgba(255, 255, 255, 0.18);
    --accent: #3987e5;
    --link: #86b6ef;
    --answer-bg: #16212f;
    --answer-edge: #3987e5;
    --btn-bg: #f0efec;
    --btn-fg: #0d0d0d;
    --focus: #86b6ef;
    --c1: #3987e5;
    --c2: #d95926;
    --c3: #199e70;
    --c4: #c98500;
    --c5: #d55181;
    --c6: #008300;
    --c7: #9085e9;
    --c8: #e66767;
    --neutral-bar: #6b6a66;
    --neutral-mark: #c3c2b7;
    --seq-lo: #184f95;
    --seq-hi: #b7d3f6;
    --node-solving: #262624;
    --node-solving-ink: #f0efec;
    --node-decision: #e8e6df;
    --node-decision-ink: #0d0d0d;
    --node-planning: #6b6a66;
    --node-planning-ink: #f0efec;
    --node-stroke: #898781;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #222220;
  --ink: #f0efec;
  --ink-2: #c3c2b7;
  --muted: #a3a29b;
  --axis-ink: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.18);
  --accent: #3987e5;
  --link: #86b6ef;
  --answer-bg: #16212f;
  --answer-edge: #3987e5;
  --btn-bg: #f0efec;
  --btn-fg: #0d0d0d;
  --focus: #86b6ef;
  --c1: #3987e5;
  --c2: #d95926;
  --c3: #199e70;
  --c4: #c98500;
  --c5: #d55181;
  --c6: #008300;
  --c7: #9085e9;
  --c8: #e66767;
  --neutral-bar: #6b6a66;
  --neutral-mark: #c3c2b7;
  --seq-lo: #184f95;
  --seq-hi: #b7d3f6;
  --node-solving: #262624;
  --node-solving-ink: #f0efec;
  --node-decision: #e8e6df;
  --node-decision-ink: #0d0d0d;
  --node-planning: #6b6a66;
  --node-planning-ink: #f0efec;
  --node-stroke: #898781;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 64px; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: var(--link); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -9999px; top: 0; }
.skip:focus { left: 16px; top: 8px; z-index: 100; background: var(--surface); padding: 6px 10px; }

/* nav */
.topnav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  -webkit-backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--border);
}
.topnav .inner {
  max-width: 1120px; margin: 0 auto; padding: 8px 16px;
  display: flex; align-items: center; gap: 4px;
}
.topnav nav { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; flex: 1; }
.topnav nav::-webkit-scrollbar { display: none; }
.topnav nav a {
  color: var(--ink-2); text-decoration: none; font-size: 14px; white-space: nowrap;
  padding: 6px 10px; border-radius: 6px;
}
.topnav nav a:hover { background: var(--surface-2); color: var(--ink); }
.theme-btn {
  flex: none; border: 1px solid var(--border-strong); background: var(--surface); color: var(--ink-2);
  font: inherit; font-size: 13px; padding: 5px 10px; border-radius: 999px; cursor: pointer;
}
.theme-btn:hover { color: var(--ink); }

/* layout */
main { display: block; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.prose { max-width: 760px; }
section.block { padding: 56px 0 24px; border-top: 1px solid var(--border); }
section.block:first-of-type { border-top: 0; }
h1, h2, h3, h4 { line-height: 1.25; color: var(--ink); }
h2 { font-size: clamp(1.45rem, 3.2vw, 1.9rem); margin: 6px 0 16px; letter-spacing: -0.01em; }
h3 { font-size: 1.08rem; margin: 0; }
p { margin: 0 0 14px; }
.eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--muted); margin: 0;
}

/* hero */
.hero { padding: 56px 0 32px; text-align: center; }
.hero h1 { font-size: clamp(1.6rem, 4.4vw, 2.6rem); margin: 0 auto 8px; max-width: 900px; letter-spacing: -0.015em; }
.hero .subtitle { font-size: clamp(1.05rem, 2.4vw, 1.35rem); color: var(--ink-2); margin: 0 auto 28px; max-width: 820px; font-weight: 500; }
.authors { font-size: 1.05rem; margin: 0 auto 6px; max-width: 860px; }
.authors span { white-space: nowrap; }
.authors a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--border, currentColor); }
.authors a:hover, .authors a:focus-visible { color: var(--link); border-bottom-color: var(--link); }
.affils { color: var(--ink-2); font-size: 0.95rem; margin: 0 auto 26px; max-width: 860px; }
.affils span { white-space: nowrap; margin: 0 8px; }
sup { font-size: 0.7em; }
.links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 34px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 20px; border-radius: 999px; background: var(--btn-bg); color: var(--btn-fg);
  text-decoration: none; font-weight: 600; font-size: 15px; border: 1px solid transparent;
}
.btn:hover { opacity: 0.88; }
.btn svg { width: 16px; height: 16px; fill: currentColor; }
.abstract {
  text-align: left; max-width: 820px; margin: 0 auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 4px 22px;
}
.abstract summary { cursor: pointer; font-weight: 600; padding: 12px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.abstract summary::-webkit-details-marker { display: none; }
.abstract summary::after { content: "Show"; font-weight: 500; font-size: 13px; color: var(--muted); }
.abstract[open] summary::after { content: "Hide"; }
.abstract p { color: var(--ink-2); padding-bottom: 8px; }

/* findings overview */
.findings { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin: 18px 0 6px; }
.finding {
  display: block; text-decoration: none; color: inherit;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px;
}
.finding:hover { border-color: var(--border-strong); }
.finding .n { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: 0.05em; text-transform: uppercase; }
.finding h3 { margin: 4px 0 8px; font-size: 1rem; }
.finding p { color: var(--ink-2); font-size: 0.93rem; margin: 0; }
.refnote { color: var(--muted); font-size: 0.85rem; margin-top: 10px; }

/* setup */
.schematic { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin: 18px 0 14px; }
.wf-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 14px 8px;
}
.wf-card h3 { font-size: 1rem; margin-bottom: 2px; }
.wf-card p { font-size: 0.85rem; color: var(--ink-2); margin: 0 0 6px; }
.wf-card svg { width: 100%; height: auto; display: block; }
.policy-row { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 14px; align-items: stretch; }
.policy-card, .grid-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.policy-card svg { width: 100%; height: auto; display: block; }
.grid-card dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; font-size: 0.92rem; }
.grid-card dt { color: var(--muted); font-weight: 600; }
.grid-card dd { margin: 0; color: var(--ink); }
.node-key { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 0.85rem; color: var(--ink-2); margin: 4px 0 0; }
.node-key span { display: inline-flex; align-items: center; gap: 6px; }
.node-key i { display: inline-block; width: 18px; height: 12px; border-radius: 3px; border: 1px solid var(--node-stroke); }
svg .n-solving { fill: var(--node-solving); stroke: var(--node-stroke); }
svg .n-decision { fill: var(--node-decision); stroke: var(--node-decision); }
svg .n-planning { fill: var(--node-planning); stroke: var(--node-planning); }
svg .t-solving { fill: var(--node-solving-ink); }
svg .t-decision { fill: var(--node-decision-ink); }
svg .t-planning { fill: var(--node-planning-ink); }
svg .t-ink { fill: var(--ink); }
svg .t-ink2 { fill: var(--ink-2); }
svg .t-muted { fill: var(--muted); }
svg .pill { fill: var(--surface-2); stroke: var(--border-strong); }
svg .edge { stroke: var(--ink-2); fill: none; stroke-width: 1.4; }
svg .edge-reward { stroke: var(--c4); fill: none; stroke-width: 1.4; }
svg .reward-bar { fill: color-mix(in srgb, var(--c4) 16%, var(--surface)); stroke: var(--c4); }
svg .adapter { fill: color-mix(in srgb, var(--c7) 14%, var(--surface)); stroke: var(--c7); }
svg .adapter-edge { stroke: var(--c7); fill: none; stroke-width: 1.3; }
svg .ah { fill: var(--ink-2); }
svg .ah-reward { fill: var(--c4); }
svg .ah-adapter { fill: var(--c7); }
svg text { font-family: var(--font); }

/* message sections */
.msg-label { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.msg-label .num {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--btn-fg); background: var(--btn-bg); border-radius: 999px; padding: 3px 10px;
}
.msg-label .sec { font-size: 13px; color: var(--muted); font-weight: 600; }
.answer {
  background: var(--answer-bg); border-left: 4px solid var(--answer-edge);
  border-radius: 0 10px 10px 0; padding: 14px 18px; margin: 0 0 26px; max-width: 860px;
}
.answer .lab { font-size: 12px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); margin-bottom: 4px; }
.answer p { margin: 0; font-size: 1.02rem; color: var(--ink); }
.result { max-width: 860px; }
.result h3, .evidence h3 { font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin: 18px 0 8px; }
.evidence { max-width: 860px; }
.evidence details {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px;
}
.evidence summary {
  cursor: pointer; padding: 11px 16px 11px 40px; font-weight: 600; position: relative; list-style: none;
}
.evidence summary::-webkit-details-marker { display: none; }
.evidence summary::before {
  content: ""; position: absolute; left: 16px; top: 50%; width: 8px; height: 8px; margin-top: -5px;
  border-right: 2px solid var(--ink-2); border-bottom: 2px solid var(--ink-2); transform: rotate(-45deg); transition: transform .15s;
}
.evidence details[open] summary::before { transform: rotate(45deg); margin-top: -7px; }
.evidence details p { padding: 0 16px 6px 40px; color: var(--ink-2); }

/* figures */
.figs { display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; margin: 0 0 8px; }
.fig {
  margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px 12px; min-width: 0;
}
.fig-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.fig-num { font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: 0.04em; text-transform: uppercase; }
.fig-head h3 { font-size: 1.02rem; }
.controls { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; margin: 0 0 8px; }
.ctl { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ctl-label { font-size: 12px; color: var(--muted); font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase; }
.seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--border-strong); border-radius: 8px; overflow: hidden; background: var(--surface); }
.seg label { position: relative; cursor: pointer; }
.seg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg span { display: block; padding: 4px 11px; font-size: 13px; color: var(--ink-2); border-right: 1px solid var(--border); white-space: nowrap; }
.seg label:last-child span { border-right: 0; }
.seg input:checked + span { background: var(--btn-bg); color: var(--btn-fg); }
.seg input:focus-visible + span { outline: 2px solid var(--focus); outline-offset: -2px; }
.chk { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-2); cursor: pointer; }
.chk input { accent-color: var(--accent); width: 15px; height: 15px; margin: 0; }
.chk .sw { display: inline-flex; }
.sel select {
  font: inherit; font-size: 13px; color: var(--ink); background: var(--surface);
  border: 1px solid var(--border-strong); border-radius: 8px; padding: 4px 8px; max-width: 100%;
}
.legend { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 2px 0 6px; font-size: 13px; color: var(--ink-2); }
.legend .it { display: inline-flex; align-items: center; gap: 6px; }
.legend svg { flex: none; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 2px 0 6px; }
.badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--ink-2);
  border: 1px solid var(--border-strong); border-radius: 999px; padding: 2px 10px; background: var(--surface-2);
}
.badge b { color: var(--ink); font-weight: 600; }
.plots { display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; }
.plots.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.plot-wrap { min-width: 0; }
.plot-title { font-size: 13px; font-weight: 600; color: var(--ink-2); margin: 4px 0 0; }
.plot { width: 100%; min-width: 0; }
.fig figcaption { font-size: 0.88rem; color: var(--ink-2); margin-top: 8px; line-height: 1.5; }
.tableview { margin-top: 8px; }
.tableview summary { cursor: pointer; font-size: 13px; color: var(--muted); font-weight: 600; }
.tbl-scroll { overflow-x: auto; margin-top: 6px; -webkit-overflow-scrolling: touch; }
table.data { border-collapse: collapse; font-size: 12.5px; width: 100%; font-variant-numeric: tabular-nums; }
table.data th, table.data td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--grid); white-space: nowrap; }
table.data th { color: var(--muted); font-weight: 600; background: var(--surface-2); position: sticky; top: 0; }
table.data td.num, table.data th.num { text-align: right; }
table.data td.note { white-space: normal; min-width: 260px; color: var(--ink-2); }
table.data td.wrap { white-space: normal; min-width: 150px; }
table.data tr.sep td { border-top: 2px solid var(--axis); }
.html-panel { overflow-x: auto; }
.rules { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.rule-card { border: 1px solid var(--border); border-radius: 10px; padding: 12px 12px 6px; background: var(--surface); min-width: 0; }
.rule-card h4 { margin: 0 0 2px; font-size: 0.95rem; display: flex; align-items: center; gap: 8px; }
.rule-card h4 i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.rule-card .rule { font-size: 0.85rem; color: var(--ink-2); margin: 0 0 8px; }
.loading { color: var(--muted); font-size: 0.9rem; padding: 24px 0; }
.error { color: var(--c8); }

/* takeaway, bibtex, footer */
.takeaway {
  font-size: 1.08rem; background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 22px; max-width: 860px;
}
.bib { position: relative; max-width: 860px; }
.bib pre {
  margin: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; overflow-x: auto; font-family: var(--mono); font-size: 12.5px; line-height: 1.55; color: var(--ink);
}
.copy-btn {
  position: absolute; top: 10px; right: 10px; font: inherit; font-size: 12px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface-2); color: var(--ink-2); border-radius: 6px; padding: 3px 10px;
}
footer { border-top: 1px solid var(--border); margin-top: 48px; padding: 24px 0 40px; color: var(--muted); font-size: 0.9rem; }

@media (max-width: 900px) {
  .schematic { grid-template-columns: minmax(0, 1fr); }
  .policy-row { grid-template-columns: minmax(0, 1fr); }
  .plots.two { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  section.block { padding-top: 40px; }
  .fig { padding: 12px 12px 10px; border-radius: 10px; }
  .hero { padding-top: 36px; }
  .abstract { padding: 2px 14px; }
  .answer { padding: 12px 14px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
@media print { .topnav, .controls, .tableview, .copy-btn { display: none; } }