:root {
  --pli-bg: #FDFDFF;
  --pli-ink: #050505;
  --pli-text: #2B2F36;
  --pli-muted: #6E6E6E;
  --pli-line: rgba(5,5,5,.12);
  --pli-panel: #FFFFFF;
  --pli-soft: #F5F6FA;
  --pli-dark: #272727;
  --pli-wrap: min(1220px, calc(100vw - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--pli-bg); }
body {
  margin: 0;
  background: var(--pli-bg);
  color: var(--pli-text);
  font-family: "DM Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.58;
  letter-spacing: -0.04em;
}
a { color: inherit; }
img, svg { max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid #111; outline-offset: 3px; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 2000;
  background: rgba(255,255,255,.84);
  border-bottom: 1px solid var(--pli-line);
  backdrop-filter: blur(16px);
}
.nav {
  width: min(1200px, 92vw);
  height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}
.links { margin-left: auto; display: flex; gap: 18px; align-items: center; }
.links a { text-decoration: none; font-size: 15px; }

h1, h2, h3 {
  margin: 0;
  color: var(--pli-ink);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.05em;
}
h1 { font-size: clamp(38px, 5vw, 66px); text-transform: uppercase; }
h2 { font-size: clamp(24px, 3vw, 34px); text-transform: uppercase; }
h3 { font-size: clamp(19px, 2vw, 24px); text-transform: uppercase; }
p, li, td, th { overflow-wrap: anywhere; }
p { margin: 0; color: var(--pli-muted); }

.course-layout {
  width: var(--pli-wrap);
  margin: 0 auto;
  padding: 104px 0 84px;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}
.course-toc {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 112px);
  overflow: auto;
  padding: 28px;
  border-radius: 10px;
  background: var(--pli-dark);
  color: #fff;
}
.course-toc h2 { color: #fff; font-size: 24px; margin-bottom: 16px; }
.course-toc a {
  display: block;
  padding: 12px 14px;
  margin-top: 10px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 8px;
  background: rgba(255,255,255,.08);
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  line-height: 1.25;
}
.course-toc a:hover { background: rgba(255,255,255,.14); }
.course-content { min-width: 0; }
.course-content > *:first-child { margin-top: 0; }
.course-content .hero,
.course-content .page-shell > .hero {
  padding: 0 0 34px;
  margin: 0 0 28px;
  border-bottom: 1px solid var(--pli-line);
}
.course-content .hero p,
.course-content .lead,
.course-content .hero-lead,
.course-content .hero-sublead {
  max-width: 920px;
  margin-top: 16px;
  color: var(--pli-muted);
  font-size: clamp(18px, 2vw, 21px);
}
.course-content .hero-grid,
.course-content .hero-toc,
.course-content .toc {
  display: none;
}
.course-content section[id],
.course-content article[id],
.course-content .course-section,
.course-content .article-card,
.course-content .report-card,
.course-content .references-card,
.course-content .s4-block,
.course-content .case-card {
  margin-top: 28px;
  padding: 30px 32px;
  border: 1px solid var(--pli-line);
  border-radius: 10px;
  background: var(--pli-panel);
}
.course-content section[id] > * + *,
.course-content article[id] > * + *,
.course-content .course-section > * + *,
.course-content .article-card > * + *,
.course-content .report-card > * + *,
.course-content .references-card > * + * { margin-top: 16px; }
.section-label,
.section-tag,
.eyebrow,
.s4-kicker {
  display: inline-flex;
  margin: 0 0 10px;
  color: var(--pli-muted);
  text-transform: uppercase;
  letter-spacing: .1em;
  font-family: "Unbounded", sans-serif;
  font-size: 12px;
  font-weight: 700;
}
.note, .warning, .method-box, .callout, .clarif {
  padding: 18px;
  border-left: 4px solid var(--pli-dark);
  background: var(--pli-soft);
}
table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  border: 1px solid var(--pli-line);
  border-radius: 8px;
  overflow: hidden;
}
th, td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--pli-line);
  text-align: left;
}
th { color: var(--pli-ink); font-family: "Unbounded", sans-serif; font-size: 12px; text-transform: uppercase; }
td { color: var(--pli-muted); }
pre {
  margin: 0;
  padding: 18px;
  overflow: auto;
  white-space: pre-wrap;
  border-radius: 8px;
  background: var(--pli-dark);
  color: #FDFDFF;
  font: 14px/1.55 ui-monospace, Menlo, Consolas, monospace;
  letter-spacing: 0;
}
.course-content figure { margin: 22px 0; }
.course-content figcaption, .source-note { color: var(--pli-muted); font-size: 14px; }

.course-cta {
  margin-top: 28px;
  padding: 28px 30px;
  border: 1px solid var(--pli-line);
  border-radius: 10px;
  background: var(--pli-dark);
  color: #fff;
}
.course-cta h2 { color: #fff; }
.course-cta p { color: rgba(255,255,255,.74); margin-top: 10px; }
.course-cta a, .btn-rumba {
  display: inline-flex;
  align-items: center;
  height: 46px;
  margin-top: 18px;
  padding: 0 15px;
  border-radius: 999px;
  background: #fff;
  color: #111;
  text-decoration: none;
  font-family: "Unbounded", sans-serif;
  font-size: 15px;
}

.pli-assessment {
  width: var(--pli-wrap);
  margin: 0 auto;
  padding: 104px 0 120px;
}
.qcm-page {
  width: var(--pli-wrap);
  margin: 0 auto;
  padding: 104px 0 120px;
}
.qcm-page .pli-assessment {
  width: 100%;
  margin: 0;
  padding: 0;
}
.pli-assessment .hero { padding: 0 0 28px; border-bottom: 1px solid var(--pli-line); }
.pli-assessment .hero .lead,
.pli-assessment .block-sub,
.pli-assessment .mini-grid,
.pli-assessment .section-tag,
.pli-assessment .score-chip,
.pli-assessment .q-meta .pill:nth-child(1),
.pli-assessment .q-meta .pill:nth-child(2) { display: none; }
.pli-assessment .session-shell { margin-top: 28px; }
.qcm-block, .qcm-surface, .q-card {
  background: #fff;
  border: 1px solid var(--pli-line);
  border-radius: 10px;
}
.qcm-block { padding: 30px 32px; }
.block-head { display: flex; justify-content: space-between; gap: 16px; align-items: end; }
.block-title { color: var(--pli-ink); }
.qcm-surface { margin-top: 22px; padding: 0; border: 0; }
.q-grid { display: grid; gap: 18px; }
.q-card { padding: 22px; }
.q-top { display: grid; gap: 12px; }
.q-title { color: var(--pli-ink); font-family: "Space Grotesk", sans-serif; font-size: 21px; line-height: 1.25; }
.q-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.pill {
  display: inline-flex;
  width: fit-content;
  padding: 6px 9px;
  border-radius: 999px;
  border: 1px solid var(--pli-line);
  color: var(--pli-muted);
  font-size: 12px;
}
.pill.ok { color: #087F5B; border-color: rgba(8,127,91,.28); }
.pill.bad { color: #C2410C; border-color: rgba(194,65,12,.28); }
.opts { display: grid; gap: 10px; margin-top: 14px; }
.opt {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border: 1px solid var(--pli-line);
  border-radius: 8px;
  background: var(--pli-soft);
  color: var(--pli-muted);
  cursor: pointer;
}
.opt input { margin-top: 5px; accent-color: #111; }
.opt:has(input:checked) { border-color: #111; background: #fff; color: var(--pli-ink); }
.pli-scorebar {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 1800;
  transform: translateX(-50%);
  width: min(860px, calc(100vw - 32px));
  padding: 14px;
  border: 1px solid var(--pli-line);
  border-radius: 16px;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 60px rgba(5,5,5,.12);
}
.score-inner { display: grid; grid-template-columns: 1.1fr 1fr auto; gap: 16px; align-items: center; }
.score-title, .grade { color: var(--pli-ink); font-family: "Unbounded", sans-serif; }
.score-sub, .mini-line { color: var(--pli-muted); font-size: 13px; }
.pbar { height: 9px; border-radius: 999px; background: #ECECEC; overflow: hidden; }
.pfill { height: 100%; background: #111; }
.btn { min-height: 42px; border: 1px solid var(--pli-line); border-radius: 999px; background: #fff; padding: 0 14px; font-family: "Unbounded", sans-serif; cursor: pointer; }

@media (max-width: 980px) {
  .links { display: none; }
  .course-layout { grid-template-columns: 1fr; width: min(100vw - 24px, 1220px); padding-top: 92px; }
  .course-toc { position: static; max-height: none; }
  .score-inner { grid-template-columns: 1fr; }
  .course-content section[id], .course-content article[id], .course-content .course-section, .course-content .article-card, .course-content .report-card, .course-content .references-card, .qcm-block { padding: 22px 18px; }
}