/* Brightloom PRD. Doc-first. Light by default, follows the OS, forced by [data-theme]. */
:root{
  color-scheme:light dark;
  --bg:light-dark(#FFFFFF,#0B0B0F);
  --card:light-dark(#FAFAFA,#14141A);
  --ink:light-dark(#18181B,#E9E9EE);
  --muted:light-dark(#71717A,#9A9AA6);
  --line:light-dark(#E4E4E7,#25252E);
  --accent:light-dark(#2563EB,#7CA5FF);
  --accent-soft:light-dark(#EFF5FF,rgba(124,165,255,.13));
  --green:light-dark(#15803D,#4ADE80);--green-bg:light-dark(#ECFDF3,rgba(74,222,128,.12));
  --amber:light-dark(#B45309,#FBBF24);--amber-bg:light-dark(#FEF6EC,rgba(251,191,36,.12));
  --sans:system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,monospace;
}
:root[data-theme="light"]{color-scheme:only light}
:root[data-theme="dark"]{color-scheme:only dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;text-wrap:pretty}
.shell{display:grid;grid-template-columns:1fr minmax(0,720px) 1fr;gap:0 40px;max-width:1180px;margin:0 auto;padding:56px 32px 96px}
.toc{grid-column:1;justify-self:end;position:sticky;top:56px;width:172px;font-size:13px;align-self:start}
.toc p{margin:0 0 12px;font-size:10.5px;font-weight:650;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.toc ol{list-style:none;margin:0;padding:0;display:grid;gap:2px;counter-reset:s}
.toc a{counter-increment:s;display:flex;gap:9px;text-decoration:none;color:var(--muted);padding:5px 9px;border-radius:6px;line-height:1.35}
.toc a::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);font-size:10px;color:var(--line);padding-top:2px}
.toc a:hover{color:var(--ink);background:var(--card)}
.toc a:target,.toc a.on{color:var(--accent);background:var(--accent-soft)}
main{grid-column:2}
.titleblock{padding-bottom:28px;border-bottom:1px solid var(--line)}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 14px}
h1{font-size:28px;font-weight:660;letter-spacing:-.026em;line-height:1.2;margin:0 0 16px}
.byline{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;font-size:13px;color:var(--muted)}
.byline b{color:var(--ink);font-weight:600}
.chip{display:inline-block;font-size:10.5px;font-weight:650;letter-spacing:.09em;text-transform:uppercase;padding:3px 8px;border-radius:5px;background:var(--accent-soft);color:var(--accent);white-space:nowrap}
.chip.p1{background:var(--accent-soft);color:var(--accent)}
.chip.p2{background:var(--amber-bg);color:var(--amber)}
.chip.p3{background:light-dark(#F4F4F5,rgba(154,154,166,.14));color:var(--muted)}
.chip.ok{background:var(--green-bg);color:var(--green)}
section{margin-top:44px;scroll-margin-top:24px}
h2{font-size:18px;font-weight:650;letter-spacing:-.016em;margin:0 0 14px;padding-bottom:0}
h2 .no{font-family:var(--mono);font-size:11px;color:var(--accent);letter-spacing:.1em;margin-right:10px;vertical-align:2px}
h3{font-size:14px;font-weight:650;margin:0 0 8px;letter-spacing:-.005em}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
a{color:var(--accent)}
.callout{border:1px solid var(--line);border-left:3px solid var(--accent);background:var(--card);border-radius:8px;padding:18px 20px;margin:20px 0}
.callout b{display:block;font-size:26px;font-weight:660;letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin-bottom:4px}
.callout span{font-size:13.5px;color:var(--muted)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.listcard{border:1px solid var(--line);border-radius:8px;padding:18px 20px;background:var(--card)}
.listcard h3{color:var(--muted);font-size:11px;letter-spacing:.11em;text-transform:uppercase;margin-bottom:12px}
.listcard ul{margin:0;padding:0;list-style:none;display:grid;gap:9px;font-size:14.5px}
.listcard li{display:grid;grid-template-columns:14px minmax(0,1fr);gap:9px}
.listcard li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent);margin-top:8px}
.listcard.no li::before{background:transparent;border:1px solid var(--muted);width:5px;height:5px;border-radius:50%}
.stories{display:grid;gap:12px}
.story{border:1px solid var(--line);border-radius:8px;padding:16px 18px 16px 20px;position:relative;background:var(--card)}
.story::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;background:var(--accent);border-radius:2px}
.story p{font-size:15px;margin:0}
.story span{display:block;font-size:12px;color:var(--muted);margin-top:7px;font-family:var(--mono);letter-spacing:.04em}
table{width:100%;border-collapse:collapse;font-size:14px}
th{text-align:left;font-size:10.5px;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding:0 12px 9px 0;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:12px 12px 12px 0;border-bottom:1px solid var(--line);vertical-align:top}
th:last-child,td:last-child{padding-right:0}
tr:last-child td{border-bottom:none}
td.id{font-family:var(--mono);font-size:12px;color:var(--muted);white-space:nowrap}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.metric{border:1px solid var(--line);border-radius:8px;padding:18px}
.metric b{display:block;font-size:24px;font-weight:660;letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin-bottom:6px}
.metric span{font-size:13px;color:var(--muted);line-height:1.45;display:block}
.qs{margin:0;padding:0;list-style:none;counter-reset:q;display:grid;gap:12px}
.qs li{counter-increment:q;display:grid;grid-template-columns:26px minmax(0,1fr);gap:12px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.qs li:last-child{border-bottom:none;padding-bottom:0}
.qs li::before{content:counter(q);font-family:var(--mono);font-size:11px;color:var(--accent);padding-top:4px}
.qs small{display:block;font-size:12px;color:var(--muted);margin-top:3px;font-family:var(--mono);letter-spacing:.03em}
@media (max-width:1080px){
  .shell{grid-template-columns:minmax(0,720px);justify-content:center;padding:40px 24px 72px}
  .toc{display:none}
  main{grid-column:1}
}
@media (max-width:560px){
  .two,.metrics{grid-template-columns:1fr}
  .shell{padding:28px 16px 56px}
  h1{font-size:24px}
  table{font-size:13px}
  th:nth-child(3),td:nth-child(3){display:none}
}
@media print{
  @page{margin:20mm}
  :root{color-scheme:only light}
  body{-webkit-print-color-adjust:exact;print-color-adjust:exact;font-size:10.5pt}
  .toc{display:none}
  .shell{display:block;max-width:none;padding:0}
  section{margin-top:22px;break-inside:avoid}
  tr,.story,.callout,.metric{break-inside:avoid}
}