/* OpensourceUI-inspired research reader: neutral chrome and screen-first type. */
:root {
  --ink: #171717;
  --ink-2: #444440;
  --muted: #70706b;
  --paper: #fafafa;
  --surface: #ffffff;
  --line: #e5e5e5;
  --line-strong: #cfcfcb;
  --blue: #3f5f78;
  --blue-soft: #f1f4f6;
  --teal: #276a61;
  --teal-soft: #eef6f4;
  --orange: #c92e4d;
  --orange-soft: #fff1f3;
  --violet: #64645f;
  --violet-soft: #f2f2ef;
  --green: #35624c;
  --green-soft: #eef5f0;
  --sidebar: 280px;
  --shadow: none;
  --display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --body: "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, sans-serif;
  --sans: "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, sans-serif;
}

body {
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.72;
  letter-spacing: 0;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.reading-progress,
.reader-progress { height: 3px; }

.reading-progress > span,
.reader-progress span { background: var(--orange); }

.mobile-bar,
.reader-top {
  min-height: 62px;
  background: rgba(255, 255, 255, .96);
  border-color: var(--line);
}

.mobile-home strong,
.reader-brand {
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .06em;
}

.menu-button,
.reader-actions a,
.reader-actions button {
  min-height: 36px;
  padding: 8px 11px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 7px;
}

.menu-button:hover,
.reader-actions a:hover,
.reader-actions button:hover {
  color: var(--ink);
  background: #f3f3f1;
  border-color: var(--ink);
}

.sidebar,
.reader-sidebar {
  color: var(--ink);
  background: var(--surface);
  border-color: var(--line);
  box-shadow: none;
}

.reader-sidebar-title {
  margin: 0 0 14px;
  font: 800 11px/1.3 var(--sans);
  letter-spacing: .11em;
  text-transform: uppercase;
}

.brand-mark {
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
}

.track-list a {
  color: var(--muted);
  border-color: var(--line);
  border-radius: 6px;
}

.track-list a:hover,
.track-list a[aria-current="page"] {
  color: var(--ink);
  background: #f1f1ef;
  border-color: var(--line);
}

.report-link {
  padding: 11px 9px;
  border: 0;
  border-radius: 6px;
}

.report-list li:last-child .report-link { border-bottom: 0; }
.report-link:hover { background: #f3f3f1; }
.report-link[aria-current="page"] { background: #f1f1ef; }
.report-link[aria-current="page"] strong { color: var(--ink); }

.toc-list a,
.reader-toc a {
  color: var(--muted);
  border-radius: 5px;
}

.toc-list a:hover,
.toc-list a.active,
.reader-toc a:hover,
.reader-toc a.active {
  color: var(--ink);
  background: #f3f3f1;
}

.reader-toc a.active {
  box-shadow: inset 2px 0 var(--ink);
}

.hero {
  min-height: auto;
  padding: clamp(62px, 7vw, 92px) clamp(28px, 6vw, 78px) clamp(58px, 7vw, 88px);
  color: var(--ink);
  background: var(--paper);
  border-bottom: 1px solid var(--line-strong);
}

.hero-grid {
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: clamp(36px, 6vw, 80px);
  max-width: 1080px;
}

.eyebrow {
  margin-bottom: 18px;
  color: var(--orange);
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: none;
}

.eyebrow::before { display: none; }

h1,
h2,
h3 { font-family: var(--display); }

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(54px, 6.3vw, 82px);
  line-height: .98;
  letter-spacing: -.045em;
}

.hero-deck {
  max-width: 680px;
  color: var(--ink-2);
  font-family: var(--body);
  font-size: clamp(18px, 1.8vw, 22px);
  line-height: 1.58;
}

.hero-meta {
  gap: 18px;
  margin-top: 30px;
  padding-top: 16px;
  border-top-color: var(--line);
}

.hero-meta dt { color: #8b8b86; }
.hero-meta dd { font-family: var(--sans); }

.radar,
.recovery-loop {
  border: 1px solid #3d3d3a;
  border-radius: 12px;
  box-shadow: none;
}

.content {
  max-width: 900px;
  padding: clamp(58px, 7vw, 86px) clamp(26px, 6vw, 64px) 130px;
}

.section {
  margin-bottom: clamp(64px, 8vw, 92px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.section-kicker {
  margin-bottom: 11px;
  color: var(--orange);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: none;
}

.section-kicker::after { display: none; }

h2 {
  max-width: 720px;
  margin-bottom: 25px;
  font-size: clamp(36px, 4.4vw, 52px);
  line-height: 1.05;
}

h3 {
  max-width: 680px;
  margin-top: 34px;
  font-size: 23px;
}

p,
.plain-list,
.checklist { max-width: 680px; }

p { margin-bottom: 19px; }

.lede {
  color: var(--ink-2);
  font-size: 20px;
  line-height: 1.66;
}

.section > .lede:first-of-type::first-letter { float: none; margin: 0; font: inherit; }

.quote {
  max-width: 720px;
  margin: 34px 0;
  padding: 22px 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line-strong);
  font-size: clamp(23px, 2.5vw, 30px);
  line-height: 1.4;
}

.callout,
.challenge {
  max-width: 760px;
  margin: 32px 0;
  padding: 24px;
  background: #f3f3f1;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
}

.callout.orange { background: var(--orange-soft); border-color: #fecdd6; }
.callout.teal { background: var(--teal-soft); border-color: #c7ded9; }
.callout.violet { background: var(--violet-soft); border-color: var(--line-strong); }
.callout.green { background: var(--green-soft); border-color: #cadecf; }
.callout .label { letter-spacing: .1em; text-transform: none; }

.cards,
.ladder {
  max-width: 800px;
  border-color: var(--line-strong);
}

.card,
.ladder > div { border-color: var(--line); }

.scenario,
.decision,
pre {
  border-radius: 9px;
  box-shadow: none;
}

.table-wrap {
  max-width: 800px;
  margin: 32px 0;
  border-color: var(--line-strong);
  border-radius: 8px;
}

table { font-size: 13px; }
th { background: var(--ink); }
tbody tr:nth-child(even) td { background: #f5f5f3; }

.decision {
  max-width: 800px;
  padding: clamp(28px, 4vw, 44px);
  background: var(--ink);
}

.decision .decision-tag { background: var(--orange); border-radius: 5px; }

.library {
  max-width: 920px;
  padding: 66px 28px 110px;
}

.library-kicker {
  color: var(--orange);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: none;
}

.library h1 {
  max-width: 760px;
  margin: 12px 0 18px;
  font-size: clamp(52px, 7vw, 80px);
}

.library-intro {
  max-width: 680px;
  color: var(--ink-2);
  font-family: var(--body);
  font-size: 19px;
  line-height: 1.65;
}

.library-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 44px;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--line-strong);
}

.research-card {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr) minmax(170px, auto);
  grid-template-areas:
    "number title theme"
    "meta title theme";
  gap: 22px;
  align-items: center;
  min-height: 0;
  padding: 18px 8px;
  background: transparent;
  border-bottom: 1px solid var(--line);
}

.research-card:hover { background: #f3f3f1; }

.research-card .num {
  grid-area: number;
  color: var(--orange);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: none;
}

.research-card h2 {
  grid-area: title;
  margin: 0 0 5px;
  font-size: 25px;
  line-height: 1.12;
}

.research-card p { grid-area: theme; margin: 0; font-size: 12px; }

.research-card .meta {
  grid-area: meta;
  color: var(--muted);
  font-size: 9px;
  text-align: left;
}

@media (min-width: 1100px) {
  body:has(> .shell > .sidebar) .mobile-bar {
    position: fixed;
    inset: 3px 0 auto;
  }

  body:has(> .shell > .sidebar) .sidebar {
    position: fixed;
    inset: 65px auto 0 0;
    width: var(--sidebar);
    height: calc(100vh - 65px);
    padding: 26px 20px 34px;
    border-right: 1px solid var(--line);
    transform: none;
  }

  body:has(> .shell > .sidebar) main { margin-left: var(--sidebar); }
  body:has(> .shell > .sidebar) .brand { display: none; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .research-card {
    grid-template-columns: 92px minmax(0, 1fr);
    grid-template-areas:
      "number title"
      "meta title"
      ". theme";
  }
}

@media (max-width: 760px) {
  body { font-size: 16px; line-height: 1.72; }
  .hero { padding: 96px 20px 54px; }
  h1 { font-size: clamp(45px, 13vw, 62px); }
  h2 { font-size: clamp(33px, 9vw, 44px); }
  .hero-deck { font-size: 18px; }
  .content { padding: 48px 18px calc(92px + env(safe-area-inset-bottom)); }
  .section { margin-bottom: 64px; }
  .callout,
  .challenge,
  .decision { margin-inline: 0; padding: 22px 20px; }
  .scenario,
  pre,
  .table-wrap { margin-inline: 0; box-shadow: none; }
  .library { padding: 48px 18px 80px; }
  .library h1 { font-size: clamp(44px, 13vw, 62px); }
  .library-intro { font-size: 17px; }

  .research-card {
    grid-template-columns: 1fr;
    grid-template-areas:
      "number"
      "title"
      "theme"
      "meta";
    gap: 6px;
    padding: 18px 2px;
  }

  .research-card .meta { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  .nav-scrim,
  .sidebar { transition: none; }
}