:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --ink: #14151a;
  --muted: #565a66;
  --line: #e6e3da;
  --accent: #b53a1d;     /* warning red */
  --accent-soft: #fdecea;
  --good: #1f6f43;       /* solution green */
  --good-soft: #e7f4ec;
  --info: #1f5fAA;       /* paper blue */
  --info-soft: #e8f0fb;
  --code-bg: #1c1d22;
  --code-ink: #f1efe7;
  --max: 920px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
        system-ui, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
a { color: var(--info); text-decoration: none; border-bottom: 1px solid rgba(31,95,170,.25); }
a:hover { border-bottom-color: var(--info); }
h1, h2, h3 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 .4em; }
h2 { font-size: 1.7rem; margin: 0 0 .6em; }
h3 { font-size: 1.15rem; margin: 1.6em 0 .4em; }
p, ul, ol { margin: 0 0 1em; }
ul { padding-left: 1.2em; }
code, kbd { font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace; font-size: 0.92em; }
code { background: #f0ede4; padding: 0.08em 0.35em; border-radius: 4px; }

/* Top nav */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 250, 247, 0.88);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topnav .wrap {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 24px;
}
.topnav .brand {
  font-weight: 700; color: var(--ink); border: none;
  font-size: 1.25rem; letter-spacing: -0.015em;
  display: inline-flex; align-items: center; gap: 10px;
}
.topnav .brand .dot {
  display: inline-block; width: 11px; height: 11px;
  border-radius: 50%; background: var(--accent);
}
.topnav .brand:hover { color: var(--accent); }
.topnav nav { display: flex; gap: 22px; align-items: center; }
.topnav nav a {
  color: var(--muted);
  border: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 3px;
  font-weight: 500; font-size: 0.94rem;
  line-height: 1.3;
}
.topnav nav a:hover { color: var(--ink); }
.topnav nav a.active {
  color: var(--ink); font-weight: 600;
  border-bottom-color: var(--accent);
}
@media (max-width: 600px) {
  .topnav .wrap { padding: 10px 16px; }
  .topnav nav { gap: 14px; }
  .topnav nav a { font-size: 0.86rem; }
  .topnav .brand .label { display: none; }
}

/* Hero */
header.hero {
  padding: 64px 0 36px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 20% 0%, rgba(181,58,29,.06), transparent 50%),
    radial-gradient(circle at 90% 30%, rgba(31,95,170,.05), transparent 50%);
}
header.hero.slim { padding: 64px 0 28px; }
.eyebrow {
  text-transform: uppercase; letter-spacing: .12em;
  font-size: 0.78rem; color: var(--muted); font-weight: 600;
  margin: 0 0 1em;
}
.eyebrow a { color: var(--muted); border-bottom-color: rgba(86,90,102,.4); }
.title-prefix {
  color: var(--accent); font-weight: 700;
  display: inline-block; margin-right: 0.3em;
}
.subtitle { font-size: 1.15rem; color: var(--muted); margin-top: .2em; max-width: 720px; }
.authors { margin-top: 1.6em; font-size: .96rem; color: var(--muted); }
.authors b { color: var(--ink); font-weight: 600; }
.affil { display: block; font-size: .86rem; margin-top: .35em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 1.8em; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 999px;
  font-size: 0.95rem; font-weight: 600;
  border: 1px solid var(--ink); color: var(--ink); background: var(--surface);
}
.btn:hover { background: var(--ink); color: var(--bg); border-bottom: 1px solid var(--ink); }
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.primary:hover { background: #000; }

/* Sections */
section { padding: 56px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: none; }
section h2 .num {
  display: inline-block; width: 1.6em; color: var(--muted);
  font-variant-numeric: tabular-nums; font-weight: 500;
}

/* Stat row */
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr));
  gap: 18px; margin: 28px 0;
}
.stat {
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 18px;
}
.stat .n {
  font-size: 2.1rem; font-weight: 700; letter-spacing: -0.02em;
  color: var(--accent); display: block; line-height: 1;
}
.stat .l { font-size: .9rem; color: var(--muted); margin-top: 6px; }
.stat.info-color .n { color: var(--info); }
.stat.good-color .n { color: var(--good); }

/* Quotes */
.quotes { display: grid; grid-template-columns: 1fr; gap: 14px; margin: 24px 0; }
@media(min-width: 720px){ .quotes { grid-template-columns: 1fr 1fr; } }
.quote {
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  padding: 14px 16px; border-radius: 0 8px 8px 0; font-size: .95rem;
}
.quote .who { display: block; font-size: .8rem; color: var(--muted); margin-top: 8px; }
.quote em { color: var(--accent); font-style: normal; font-weight: 600; }
blockquote.quote { margin: 0; }

/* Two-panel diagram */
.diagram {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 22px; margin: 24px 0;
}
.panels { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media(min-width: 720px){ .panels { grid-template-columns: 1fr 1fr; gap: 28px; } }
.panel { padding: 16px; border-radius: 10px; }
.panel.bad { background: #fff7f3; border: 1px solid #f3d3c8; }
.panel.good { background: #f0f8f3; border: 1px solid #c8e2d2; }
.panel h3 { margin-top: 0; font-size: 1rem; letter-spacing: 0; }
.panel ul { padding-left: 1.1em; margin-bottom: 0; font-size: .92rem; color: var(--muted); }
.panel ul li { margin: 4px 0; }
.panel ul li b { color: var(--ink); font-weight: 600; }

/* Tag chips */
.tag {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  font-size: .76rem; font-weight: 600; letter-spacing: .02em;
  text-transform: uppercase; vertical-align: middle;
}
.tag.info { background: var(--info-soft); color: var(--info); }
.tag.ctrl { background: #fff1e0; color: #a05a00; }
.tag.bad { background: var(--accent-soft); color: var(--accent); }
.tag.good { background: var(--good-soft); color: var(--good); }

/* Feature blocks */
.feature {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; padding: 24px; margin: 18px 0;
}
.feature h3 { margin-top: 0; font-size: 1.25rem; }
.feature .lead { color: var(--muted); font-size: .98rem; margin-bottom: 1em; }

/* Code blocks */
pre {
  background: var(--code-bg); color: var(--code-ink);
  padding: 14px 16px; border-radius: 10px; overflow-x: auto;
  font-size: 0.85rem; line-height: 1.55; margin: 0 0 1em;
}
pre .c   { color: #888; }                          /* comment            */
pre .k   { color: #f8b34c; }                       /* prompt $           */
pre .s   { color: #9ad17b; }                       /* string             */
pre .p   { color: #ec7c87; }                       /* path               */
pre .ok  { color: #6cd47a; font-weight: 600; }     /* ✓ success          */
pre .ask { color: #ffcc66; font-weight: 600; }     /* [ask] prompt       */
pre .err { color: #ff6b6b; font-weight: 600; }     /* ✗ error / deny     */
pre .add { color: #6cd47a; }                       /* + added file       */
pre .del { color: #ff8a7a; }                       /* - deleted file     */
pre .mod { color: #6db7ff; }                       /* M modified         */
pre .ren { color: #c79aff; }                       /* R renamed          */
pre .dim { color: #777; }                          /* dim explanatory    */
pre .you { color: #ffd874; font-weight: 600; }     /* user input echo    */
pre .b   { color: #f1efe7; font-weight: 600; }     /* bold inline        */

/* Results table */
.results {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 8px 0;
  font-size: .92rem; overflow-x: auto;
}
.results table { border-collapse: collapse; width: 100%; min-width: 540px; }
.results th, .results td {
  text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line);
}
.results th { font-weight: 600; color: var(--muted); font-size: .82rem;
              text-transform: uppercase; letter-spacing: .04em; background: #faf8f2; }
.results td.num { font-variant-numeric: tabular-nums; text-align: right; }
.results tr:last-child td { border-bottom: none; }
.results .hl { background: var(--good-soft); }
.results .hl td { font-weight: 600; }

/* Footer */
footer { padding: 36px 0 56px; color: var(--muted); font-size: .9rem; }
footer a { color: var(--muted); }

/* Misc */
.lead { font-size: 1.1rem; color: #2a2c34; }
.spaced { margin-top: 1.4em; }
.epigraph {
  margin: 0 0 1.4em; padding: 0 0 0 14px;
  border-left: 2px solid var(--line);
  color: var(--muted); font-style: italic;
  font-size: 1rem; line-height: 1.5;
}
.epigraph .who { font-style: normal; font-size: .82rem; }
.spaced-sm { margin-top: 1em; }
.no-top { margin-top: 0; }
pre.diagram-ascii {
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line);
  font-size: 0.86rem;
  line-height: 1.4;
}
.callout {
  background: var(--info-soft); border: 1px solid #cdddee;
  border-radius: 10px; padding: 14px 16px; margin: 16px 0; font-size: .96rem;
}
.callout b { color: var(--info); }
.small { font-size: 0.88rem; color: var(--muted); }

/* ─────  Bar charts  ───── */
.bars { margin: 16px 0 22px; }
.bar-row {
  display: grid;
  grid-template-columns: 7.5em 1fr 4em;
  align-items: center;
  gap: 10px;
  padding: 5px 0;
  font-size: .92rem;
}
.bar-label { color: var(--ink); font-weight: 500; }
.bar-track {
  height: 14px; background: #eeeae0; border-radius: 7px;
  overflow: hidden;
}
.bar-fill {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, #d56142 100%);
  border-radius: 7px;
}
.bar-fill.info { background: linear-gradient(90deg, var(--info) 0%, #4a87cf 100%); }
.bar-fill.good { background: linear-gradient(90deg, var(--good) 0%, #4a9a6c 100%); }
.bar-fill.muted { background: linear-gradient(90deg, #888 0%, #aaa 100%); }
.bar-num { font-variant-numeric: tabular-nums; color: var(--muted); font-size: .9rem; text-align: right; }
@media(max-width: 540px) {
  .bar-row { grid-template-columns: 6.5em 1fr 3.6em; gap: 6px; font-size: .88rem; }
}

/* Two-up grid for compact comparison */
.twoup {
  display: grid; grid-template-columns: 1fr; gap: 22px;
}
@media(min-width: 720px){ .twoup { grid-template-columns: 1fr 1fr; gap: 28px; } }
.twoup h3 { margin-top: 0; }

/* Cause taxonomy cards */
.causes { display: grid; grid-template-columns: 1fr; gap: 14px; margin: 18px 0; }
@media(min-width: 720px){ .causes { grid-template-columns: 1fr 1fr 1fr; } }
.cause {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px;
}
.cause h3 { margin: 0 0 .3em; font-size: 1.05rem; }
.cause .role { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.cause ul { font-size: .92rem; color: var(--muted); margin: 10px 0 0; padding-left: 1.1em; }
.cause ul li { margin: 6px 0; }
.cause ul li b { color: var(--ink); font-weight: 600; }

/* Findings (paper-style boxes) */
.finding {
  border: 1px solid var(--line); background: #fffceb;
  border-left: 4px solid #c79a00;
  border-radius: 6px; padding: 12px 16px; margin: 12px 0;
  font-size: .96rem;
}
.finding b { color: #8a6900; }