:root {
  color-scheme: light;
  --navy: #10233f;
  --navy-2: #17375e;
  --blue: #2667ff;
  --blue-soft: #e9f0ff;
  --green: #087f5b;
  --green-soft: #e8f7f1;
  --amber: #a15c00;
  --amber-soft: #fff3db;
  --ink: #172033;
  --muted: #5c687c;
  --line: #dfe5ee;
  --page: #f3f6fa;
  --surface: #ffffff;
  --shadow: 0 12px 32px rgba(16, 35, 63, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: var(--blue); }
.reading-progress { position: fixed; inset: 0 0 auto; height: 3px; z-index: 50; background: transparent; }
.reading-progress span { display: block; width: 0; height: 100%; background: var(--blue); }
.research-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  gap: 8px;
  align-items: center;
  min-height: 56px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}
.research-header a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 10px;
  border-radius: 10px;
  color: var(--navy);
  font-size: 0.83rem;
  font-weight: 800;
  text-decoration: none;
}
.research-header a:hover { background: var(--blue-soft); }
.research-header .back-link { margin-right: auto; }
.report-shell, .library-shell, .sources-shell { width: min(100%, 1120px); margin: 0 auto; padding: 18px 14px 72px; }
.report-intro, .library-hero {
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(150deg, #fff, #f6f9ff);
  box-shadow: var(--shadow);
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
h1 { margin: 0; color: var(--navy); font-size: clamp(2rem, 7vw, 3.7rem); line-height: 1.04; letter-spacing: -0.045em; }
.summary, .library-hero > p:not(.eyebrow) { max-width: 760px; margin: 15px 0 0; color: var(--muted); font-size: 1.03rem; }
.meta-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.meta-row span, .card-meta span, .source-tags span, .group {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--navy);
  background: var(--blue-soft);
  font-size: 0.74rem;
  font-weight: 800;
}
.takeaway { margin-top: 18px; padding: 14px; border-left: 4px solid var(--green); border-radius: 12px; background: var(--green-soft); }
.takeaway strong { display: block; color: var(--green); }
.source-index { margin-top: 14px; border: 1px solid var(--line); border-radius: 13px; background: #fff; }
.source-index summary { min-height: 48px; padding: 12px 14px; color: var(--navy); font-weight: 850; cursor: pointer; }
.source-index ol { max-height: 50vh; margin: 0; padding: 0 16px 16px 38px; overflow: auto; }
.source-index li { margin: 10px 0; }
.source-index li span { display: block; color: var(--muted); font-size: 0.75rem; }
.mobile-jump { display: block; margin-top: 14px; color: var(--navy); font-size: 0.8rem; font-weight: 850; }
.mobile-jump select { display: block; width: 100%; min-height: 46px; margin-top: 6px; padding: 0 10px; border: 1px solid var(--line); border-radius: 11px; background: #fff; color: var(--ink); font: inherit; }
.report-grid { display: grid; gap: 18px; margin-top: 18px; }
.toc { display: none; }
.markdown { min-width: 0; padding: 22px 18px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow); }
.markdown h2, .markdown h3, .markdown h4 { position: relative; scroll-margin-top: 78px; color: var(--navy); line-height: 1.22; letter-spacing: -0.02em; }
.markdown h2 { margin: 38px 0 14px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 1.45rem; }
.markdown h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.markdown h3 { margin: 27px 0 10px; font-size: 1.15rem; }
.markdown h4 { margin: 20px 0 8px; font-size: 1rem; }
.heading-link { margin-left: 7px; color: #aab5c5; font-size: 0.75em; text-decoration: none; opacity: 0; }
.markdown h2:hover .heading-link, .markdown h3:hover .heading-link { opacity: 1; }
.markdown p { margin: 0 0 14px; }
.markdown li { margin: 7px 0; }
.markdown blockquote { margin: 16px 0; padding: 10px 14px; border-left: 4px solid var(--blue); background: var(--blue-soft); }
.markdown table { display: block; width: 100%; margin: 16px 0; border-collapse: collapse; overflow-x: auto; white-space: nowrap; }
.markdown th, .markdown td { padding: 9px 11px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.markdown th { background: #f4f7fb; color: var(--navy); }
.markdown code { padding: 2px 5px; border-radius: 5px; background: #eef2f7; font-size: 0.9em; }
.markdown pre { max-width: 100%; padding: 14px; border-radius: 12px; overflow: auto; background: var(--navy); color: #fff; }
.markdown pre code { padding: 0; background: transparent; }
.external-link::after { content: " ↗"; font-size: 0.72em; }
.library-hero { margin-bottom: 18px; color: #fff; background: radial-gradient(circle at 90% -10%, rgba(92,157,255,.55), transparent 42%), linear-gradient(145deg, var(--navy), var(--navy-2)); }
.library-hero h1, .library-hero .eyebrow { color: #fff; }
.library-hero > p:not(.eyebrow) { color: rgba(255,255,255,.82); }
.library-hero.compact h1 { font-size: clamp(1.9rem, 7vw, 3rem); }
.hero-link { display: inline-flex; align-items: center; min-height: 44px; margin-top: 18px; padding: 8px 12px; border-radius: 11px; color: #fff; background: rgba(255,255,255,.13); font-weight: 850; text-decoration: none; }
.library-grid { display: grid; gap: 12px; }
.library-card { padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow); }
.library-card h2 { margin: 12px 0 8px; color: var(--navy); font-size: 1.15rem; line-height: 1.25; }
.library-card p { margin: 0; color: var(--muted); }
.card-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.primary-link { display: inline-flex; align-items: center; min-height: 44px; margin-top: 12px; font-weight: 850; text-decoration: none; }
.source-search { display: block; margin-top: 18px; font-size: 0.8rem; font-weight: 850; }
.source-search input { display: block; width: 100%; min-height: 48px; margin-top: 6px; padding: 0 13px; border: 1px solid rgba(255,255,255,.3); border-radius: 12px; color: var(--ink); background: #fff; font: inherit; }
.filter-row { display: flex; gap: 7px; margin-top: 12px; overflow-x: auto; scrollbar-width: none; }
.filter-row::-webkit-scrollbar { display: none; }
.filter-button { flex: 0 0 auto; min-height: 42px; padding: 6px 11px; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; color: #fff; background: rgba(255,255,255,.08); font: inherit; font-size: 0.78rem; font-weight: 800; cursor: pointer; }
.filter-button.active { color: var(--navy); background: #fff; }
.result-count { font-size: 0.85rem !important; }
.source-list { display: grid; gap: 10px; margin-top: 18px; }
.source-row { padding: 16px; border: 1px solid var(--line); border-radius: 15px; background: #fff; }
.source-row[hidden] { display: none; }
.source-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.source-row h2 { margin: 10px 0 7px; font-size: 1rem; line-height: 1.3; }
.source-row h2 a { color: var(--navy); }
.source-row p { margin: 0 0 8px; color: var(--muted); font-size: 0.9rem; }
.source-row small { color: #788397; }
footer { padding: 0 16px calc(36px + env(safe-area-inset-bottom)); text-align: center; font-size: 0.8rem; }

@media (min-width: 760px) {
  .report-shell, .library-shell, .sources-shell { padding: 28px 20px 90px; }
  .report-intro, .library-hero { padding: 34px; }
  .report-grid { grid-template-columns: 230px minmax(0, 1fr); align-items: start; }
  .toc { position: sticky; top: 78px; display: grid; gap: 2px; max-height: calc(100vh - 100px); padding: 14px; border: 1px solid var(--line); border-radius: 15px; overflow: auto; background: #fff; }
  .toc strong { margin: 3px 7px 8px; color: var(--navy); }
  .toc a { padding: 7px; border-radius: 8px; color: var(--muted); font-size: 0.8rem; line-height: 1.3; text-decoration: none; }
  .toc a:hover { color: var(--navy); background: var(--blue-soft); }
  .mobile-jump { display: none; }
  .markdown { padding: 34px; }
  .library-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .source-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}