/* ===========================================================
   Formation SEO/GEO — Maquette 2 : style "bold & ludique"
   Néo-brutalisme doux : contours épais, ombres franches, couleurs vives.
   =========================================================== */

:root {
  --bg: #f4f1ff;
  --bg-soft: #ebe6ff;
  --surface: #ffffff;
  --ink: #15122b;
  --ink-soft: #46406b;
  --ink-faint: #8680ab;
  --border: #15122b;

  --brand: #5b2ee8;        /* violet vif */
  --brand-dark: #3d1cb0;
  --brand-soft: #e7e0ff;
  --accent: #ffb703;       /* jaune franc - CTA */
  --accent-dark: #d99600;
  --accent-soft: #fff2d2;
  --mint: #05d19c;

  --palier-0: #05a97a;  /* vert */
  --palier-0-bg: #d3f7ea;
  --palier-1: #05a97a;
  --palier-1-bg: #d3f7ea;
  --palier-2: #05a97a;
  --palier-2-bg: #d3f7ea;
  --palier-3: #05a97a;
  --palier-3-bg: #d3f7ea;
  --palier-4: #05a97a;
  --palier-4-bg: #d3f7ea;
  --palier-5: #e0a300;  /* jaune */
  --palier-5-bg: #fff0c2;
  --palier-6: #e0a300;
  --palier-6-bg: #fff0c2;
  --palier-7: #f0355b;  /* rouge/rose */
  --palier-7-bg: #ffdbe4;
  --palier-8: #f0355b;
  --palier-8-bg: #ffdbe4;
  --palier-9: #5b2ee8;  /* violet */
  --palier-9-bg: #e7e0ff;

  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 16px;
  --shadow: 4px 4px 0 var(--ink);
  --shadow-hover: 6px 6px 0 var(--ink);

  --font: "DM Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-serif: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; }

p, li, td, h1, h2, h3, h4 { overflow-wrap: break-word; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.6em;
  color: var(--ink);
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; color: var(--ink-soft); }
.chapter-body ul:not([class]) { margin: 0 0 1em; color: var(--ink-soft); }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 3px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--ink);
}

.logo-mark {
  width: 38px;
  height: 38px;
  object-fit: contain;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-soft);
  transition: color 0.15s ease;
  position: relative;
}

.main-nav a:hover,
.main-nav a.active { color: var(--ink); }

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -26px;
  height: 3px;
  background: var(--brand);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-s);
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  white-space: nowrap;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 0 0 2px var(--border), var(--shadow);
}

.btn:active { transform: translate(2px, 2px); box-shadow: 0 0 0 2px var(--border), 1px 1px 0 var(--ink); }

.btn-primary {
  background: var(--accent);
  color: var(--ink);
}

.btn-primary:hover { box-shadow: 0 0 0 2px var(--border), var(--shadow-hover); transform: translate(-1px, -1px); }

.btn-ghost {
  background: var(--surface);
  color: var(--ink);
}

.btn-ghost:hover { background: var(--brand-soft); box-shadow: 0 0 0 2px var(--border), var(--shadow-hover); transform: translate(-1px, -1px); }

.btn-sm { padding: 9px 16px; font-size: 0.85rem; box-shadow: 0 0 0 2px var(--border), 3px 3px 0 var(--ink); }

.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}
.btn[disabled]:hover, .btn[disabled]:active { transform: none; }

/* ---------- Hero ---------- */

.hero {
  padding: 72px 0 56px;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--mint);
  color: var(--ink);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 7px 14px;
  border-radius: var(--radius-s);
  border: 2px solid var(--border);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.2vw, 3.3rem);
  margin-bottom: 0.4em;
}

.hero h1 em {
  font-style: normal;
  background: var(--accent);
  padding: 0 8px;
  border: 2.5px solid var(--border);
  border-radius: var(--radius-s);
  box-shadow: 4px 4px 0 var(--ink);
  display: inline-block;
}

.hero-lede {
  font-size: 1.15rem;
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin: 28px 0 24px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.hero-meta span { display: flex; align-items: center; gap: 6px; }

.hero-art {
  background: var(--surface);
  border: 3px solid var(--border);
  border-radius: var(--radius-l);
  box-shadow: 8px 8px 0 var(--ink);
  padding: 28px;
}

.hero-art .fake-browser-bar {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}
.hero-art .fake-browser-bar span {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg-soft);
  border: 2px solid var(--border);
}

.hero-progress-card {
  background: var(--bg-soft);
  border: 2px solid var(--border);
  border-radius: var(--radius-m);
  padding: 16px;
  margin-bottom: 14px;
}

.hero-progress-card .label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
}

.hero-program-row {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-soft);
  border: 2px solid var(--border);
  border-radius: var(--radius-m);
  padding: 14px 16px;
  margin-bottom: 12px;
}

.hero-program-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-s);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 0.85rem;
}

.hero-program-row div { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.hero-program-row strong { font-size: 0.92rem; color: var(--ink); }
.hero-program-count { font-size: 0.78rem; font-weight: 700; color: var(--ink-faint); }

.progress-track {
  height: 12px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--brand);
  border-radius: 999px;
}

.hero-chip-row { display: flex; gap: 8px; flex-wrap: wrap; }

.chip {
  font-size: 0.78rem;
  font-weight: 800;
  padding: 6px 12px;
  border-radius: var(--radius-s);
  background: var(--brand-soft);
  color: var(--ink);
  border: 2px solid var(--border);
}

/* ---------- Section generic ---------- */

section { padding: 60px 0; }

.section-head {
  max-width: 640px;
  margin: 0 auto 40px;
  text-align: center;
}

.section-head .eyebrow { margin-bottom: 14px; }

.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }

/* ---------- Palier grid (home) ---------- */

.palier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.palier-card {
  background: var(--surface);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-m);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.12s ease, transform 0.12s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.palier-card:hover { box-shadow: var(--shadow-hover); transform: translate(-2px, -2px); }

.palier-num {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-s);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-family: var(--font-serif);
  font-size: 0.95rem;
}

.palier-card h3 { font-size: 1.05rem; margin-bottom: 4px; }

.palier-card p { font-size: 0.9rem; margin-bottom: 0; }

.palier-card .count {
  margin-top: auto;
  padding-top: 12px;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* palier color variants */
.p-0 .palier-num, .p-1 .palier-num, .p-2 .palier-num, .p-3 .palier-num, .p-4 .palier-num { background: var(--palier-0-bg); color: var(--palier-0); }
.p-5 .palier-num, .p-6 .palier-num { background: var(--palier-5-bg); color: var(--palier-5); }
.p-7 .palier-num, .p-8 .palier-num { background: var(--palier-7-bg); color: var(--palier-7); }
.p-9 .palier-num { background: var(--palier-9-bg); color: var(--palier-9); }

/* ---------- How it works ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step {
  text-align: center;
}

.step-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-m);
  background: var(--surface);
  border: 2.5px solid var(--border);
  box-shadow: 3px 3px 0 var(--ink);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 16px;
}

.step h4 { font-size: 1rem; margin-bottom: 6px; }
.step p { font-size: 0.88rem; }

/* ---------- Trust band ---------- */

.trust-band {
  background: var(--ink);
  color: #fff;
  padding: 56px 0;
  border-top: 3px solid var(--border);
  border-bottom: 3px solid var(--border);
}

.trust-band .container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

.trust-band h2 { color: #fff; }
.trust-band p { color: rgba(255,255,255,0.75); }

.trust-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.trust-stat {
  background: rgba(255,255,255,0.06);
  border: 2px solid rgba(255,255,255,0.35);
  border-radius: var(--radius-m);
  padding: 18px;
  text-align: center;
}

.trust-stat strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.7rem;
  color: var(--accent);
}

.trust-stat span {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.65);
  font-weight: 700;
}

/* ---------- Final CTA ---------- */

.final-cta {
  text-align: center;
  padding: 76px 0;
}

.final-cta h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); }
.final-cta p { max-width: 50ch; margin-left: auto; margin-right: auto; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 3px solid var(--border);
  padding: 36px 0;
  color: var(--ink-faint);
  font-size: 0.85rem;
  font-weight: 700;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--ink); }

/* ===========================================================
   Page Programme
   =========================================================== */

.page-hero {
  padding: 44px 0 30px;
  border-bottom: 3px solid var(--border);
}

.page-hero h1 { font-size: clamp(1.9rem, 3.6vw, 2.5rem); }
.page-hero p { max-width: 60ch; }

/* ===========================================================
   Page À propos
   =========================================================== */

.about-body { max-width: 720px; margin: 0 auto; }
.about-body .hook-block,
.about-body .measure-card { margin: 28px 0; }
.about-body .measure-card p { margin-bottom: 0; color: var(--ink); }
.about-welcome { font-size: 1.1rem; }

.about-cta { background: var(--bg-soft); border-top: 3px solid var(--border); }
.about-cta .objectives-list { max-width: 520px; margin: 24px auto; text-align: left; }
.about-cta .hero-chip-row { justify-content: center; margin: 8px 0 20px; }
.about-cta .hero-actions { justify-content: center; }

.programme-legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.legend-dot {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--ink-soft);
}

.legend-dot i {
  width: 12px; height: 12px; border-radius: var(--radius-s); display: inline-block;
  border: 1.5px solid var(--border);
}

.programme-list { padding: 36px 0 76px; }
.programme-list .container { display: flex; flex-direction: column; gap: 16px; max-width: 950px; }

.palier-block {
  background: var(--surface);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-m);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.palier-block summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.palier-block summary::-webkit-details-marker { display: none; }

.palier-block .badge {
  width: 46px; height: 46px;
  border-radius: var(--radius-s);
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-family: var(--font-serif);
  flex-shrink: 0;
}

.palier-block summary .titles { flex: 1; }
.palier-block summary h2 { font-size: 1.05rem; margin-bottom: 2px; }
.palier-block summary .sub { font-size: 0.85rem; color: var(--ink-faint); font-weight: 700; }

.palier-block .chev {
  color: var(--ink-faint);
  transition: transform 0.2s ease;
  font-size: 1.2rem;
  font-weight: 800;
}
.palier-block[open] .chev { transform: rotate(180deg); }

.chapter-rows {
  border-top: 2.5px solid var(--border);
}

.chapter-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px 14px 70px;
  border-top: 2px dashed var(--bg-soft);
  font-size: 0.92rem;
  transition: background 0.12s ease;
}

.chapter-row:first-child { border-top: none; }
.chapter-row:hover { background: var(--bg-soft); }

.chapter-row .idx {
  width: 22px;
  color: var(--ink-faint);
  font-weight: 800;
  font-size: 0.82rem;
}

.chapter-row .name { flex: 1; font-weight: 700; }

.status {
  font-size: 0.7rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-s);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border: 1.5px solid var(--border);
}

.status-published { background: var(--palier-0-bg); color: var(--ink); }
.status-draft { background: var(--bg-soft); color: var(--ink-faint); }

.chapter-row .arrow { color: var(--ink-faint); font-size: 0.9rem; font-weight: 800; }

.palier-block-footer {
  padding: 14px 24px;
  border-top: 2.5px solid var(--border);
  text-align: right;
}
.palier-block-footer a { font-size: 0.85rem; font-weight: 800; }

.chapter-row.disabled { cursor: default; opacity: 0.7; }
.chapter-row.disabled:hover { background: none; }
.chapter-row.disabled .name { color: var(--ink-faint); font-weight: 600; }

/* ===========================================================
   Page Chapitre
   =========================================================== */

.breadcrumb {
  padding: 18px 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-faint);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb a { font-weight: 800; color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--ink); }

.chapter-hero {
  padding: 8px 0 36px;
}

.chapter-hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
  max-width: 998px;
}

.chapter-hero-grid > div:first-child { padding-left: 15px; min-width: 0; }

.chapter-hero-tag {
  padding-top: 6px;
  min-width: 0;
}

.chapter-hero .palier-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--palier-0-bg);
  color: var(--ink);
  font-weight: 800;
  font-size: 0.8rem;
  padding: 6px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius-s);
  max-width: 100%;
}

.chapter-hero h1 { font-size: clamp(1.9rem, 3.5vw, 2.6rem); max-width: 22ch; }

.chapter-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.chapter-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-s);
  padding: 6px 12px;
  box-shadow: 3px 3px 0 var(--ink);
}

.chapter-layout {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 48px;
  padding-bottom: 76px;
  align-items: start;
}

.chapter-toc {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chapter-toc a {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-faint);
  padding: 8px 12px;
  border-left: 3px solid var(--border);
  transition: all 0.15s ease;
}

.chapter-toc a:hover { color: var(--ink); }
.chapter-toc a.active { color: var(--ink); border-left-color: var(--brand); background: var(--brand-soft); border-radius: 0 var(--radius-s) var(--radius-s) 0; }

.chapter-body { max-width: 720px; min-width: 0; }

.block {
  margin-bottom: 50px;
  scroll-margin-top: 100px;
}

.block-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  border-left: 5px solid var(--brand);
  padding: 4px 0 4px 14px;
  margin-bottom: 16px;
}

.block-kicker .num {
  color: var(--brand);
  font-family: var(--font-serif);
  font-size: 0.95rem;
  flex-shrink: 0;
}

.block-kicker .num::after { content: "·"; margin-left: 12px; color: var(--border); }

.block > h3 { font-size: 1.1rem; }

.hook-block {
  background: var(--ink);
  color: #fff;
  padding: 32px;
  border-radius: var(--radius-l);
  border: 3px solid var(--border);
  box-shadow: 6px 6px 0 var(--brand);
}
.hook-block .block-kicker { color: #fff; border-left-color: var(--accent); }
.hook-block .block-kicker .num { color: var(--accent); }
.hook-block .block-kicker .num::after { color: rgba(255,255,255,0.35); }
.hook-block h3 { color: #fff; }
.hook-block p { color: rgba(255,255,255,0.85); font-size: 1.05rem; }

.objectives-list {
  list-style: none;
  margin: 0 0 20px; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.objectives-list li {
  display: flex;
  align-items: flex-start;
  font-size: 0.96rem;
  color: var(--ink-soft);
  background: var(--bg-soft);
  border: 2px solid var(--border);
  padding: 12px 16px;
  border-radius: var(--radius-s);
}
.objectives-list li .tick {
  color: var(--ink);
  background: var(--mint);
  border: 1.5px solid var(--border);
  border-radius: 50%;
  width: 20px; height: 20px;
  margin-right: 12px;
  margin-bottom: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem;
  font-weight: 800;
  flex-shrink: 0;
}
.objectives-list li .tick.tick-white { color: #fff; }

.analogy-card {
  background: var(--accent-soft);
  border: 2.5px solid var(--border);
  border-left: 6px solid var(--accent);
  border-radius: var(--radius-s);
  padding: 18px 20px;
  margin: 20px 0;
  font-size: 0.95rem;
  color: var(--ink);
}
.analogy-card strong { color: var(--ink); }

.example-card {
  background: var(--surface);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-m);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  max-width: 100%;
  box-sizing: border-box;
}
.example-card .example-bar {
  background: var(--bg-soft);
  padding: 10px 16px;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--ink-faint);
  display: flex; align-items: center; gap: 8px;
  border-bottom: 2.5px solid var(--border);
}
.example-card pre {
  margin: 0;
  padding: 20px;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.86rem;
  color: var(--brand-dark);
  background: var(--surface);
  max-width: 100%;
  box-sizing: border-box;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
}

.practice-block {
  background: var(--bg-soft);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-l);
  padding: 30px;
  margin-bottom: 30px;
}

.practice-step {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-top: 2px dashed var(--border);
}
.practice-step:first-of-type { border-top: none; padding-top: 4px; }

.practice-step .step-num {
  width: 34px; height: 34px;
  border-radius: var(--radius-s);
  border: 2px solid var(--border);
  background: var(--brand);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.practice-step .step-title { font-size: 1rem; font-weight: 700; color: var(--ink); margin: 0 0 6px; }
.practice-step p { font-size: 0.92rem; margin-bottom: 0; }

code {
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.92em;
  background: var(--bg-soft);
  color: var(--ink);
  border: 1.5px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  overflow-wrap: break-word;
  word-break: break-word;
}

.pitfall {
  margin-top: 12px;
  margin-bottom: 20px;
  background: var(--accent-soft);
  border: 2px solid var(--border);
  border-radius: var(--radius-s);
  padding: 12px 14px;
  font-size: 0.86rem;
  color: var(--ink);
  font-weight: 600;
}

.jargon-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--surface);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.jargon-table th, .jargon-table td {
  padding: 14px 18px;
  text-align: left;
  border-top: 2px solid var(--border);
  vertical-align: top;
  overflow-wrap: break-word;
}
.jargon-table th { background: var(--ink); color: #fff; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; border-top: none;}
.jargon-table td:first-child { width: 38%; font-weight: 800; color: var(--brand-dark); font-family: var(--font-serif); }

.measure-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--brand-soft);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-m);
  padding: 20px 24px;
}
.measure-card .icon { font-size: 1.4rem; }

.next-card {
  background: var(--surface);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.next-card-prev-row {
  padding: 12px 28px;
  border-bottom: 2.5px solid var(--border);
  background: var(--bg-soft);
}
.next-card-prev-row a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--ink-soft);
}
.next-card-prev-row a:hover { color: var(--ink); }
.next-card-body {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 28px;
  flex-wrap: wrap;
}
.next-card .label { font-size: 0.8rem; font-weight: 800; color: var(--ink-faint); text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: 4px; }
.next-card h3 { font-size: 1.1rem; margin: 0; }

/* ---------- Quiz ---------- */

.quiz-block {
  border: 3px solid var(--border);
  border-radius: var(--radius-l);
  padding: 32px;
  background: var(--surface);
  box-shadow: 6px 6px 0 var(--ink);
}

.quiz-progress {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 24px;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--ink-faint);
}
.quiz-progress .progress-track { flex: 1; }

.quiz-question { margin-bottom: 28px; }
.quiz-question .question-title { font-size: 1.02rem; font-weight: 700; color: var(--ink); margin: 0 0 14px; }

.quiz-options { display: flex; flex-direction: column; gap: 10px; }

.quiz-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border: 2.5px solid var(--border);
  border-radius: var(--radius-s);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s ease;
}
.quiz-option:hover { transform: translate(-1px, -1px); box-shadow: 3px 3px 0 var(--ink); }

.quiz-option .letter {
  width: 26px; height: 26px;
  border-radius: var(--radius-s);
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--ink-faint);
  flex-shrink: 0;
}

.quiz-option.correct {
  border-color: var(--border);
  background: var(--palier-0-bg);
}
.quiz-option.correct .letter { background: var(--palier-0); color: #fff; border-color: var(--border); }

.quiz-option.incorrect {
  border-color: var(--border);
  background: var(--palier-7-bg);
}
.quiz-option.incorrect .letter { background: var(--palier-7); color: #fff; border-color: var(--border); }

.quiz-explain {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-s);
  background: var(--bg-soft);
  border: 2px solid var(--border);
  font-size: 0.88rem;
  color: var(--ink-soft);
  display: none;
  gap: 10px;
}
.quiz-explain.visible { display: flex; }
.quiz-explain strong { color: var(--ink); }

.quiz-option[aria-disabled="true"] { cursor: default; }
.quiz-next-btn { margin-top: 16px; }

.quiz-score {
  text-align: center;
  padding: 20px 0 4px;
}
.quiz-score .score-num {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  color: var(--brand);
}
.quiz-score .score-actions { display:flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; }
  .chapter-hero-grid { grid-template-columns: 1fr; }
  .chapter-hero-tag { padding-top: 0; padding-left: 15px; }
  .palier-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .trust-band .container { grid-template-columns: 1fr; }
  .chapter-layout { grid-template-columns: 1fr; }
  .chapter-toc { position: static; flex-direction: row; overflow-x: auto; gap: 4px; padding-bottom: 8px; }
  .chapter-toc a { border-left: none; border-bottom: 3px solid var(--border); white-space: nowrap; }
  .chapter-toc a.active { border-radius: var(--radius-s) var(--radius-s) 0 0; }
  .example-card pre {
    font-size: 0.74rem;
    padding: 14px;
    white-space: pre-wrap;
    word-break: break-word;
    overflow-wrap: break-word;
  }
}

/* ---------- Nav toggle (mobile burger menu) ---------- */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border: 2.5px solid var(--border);
  border-radius: var(--radius-s);
  background: var(--surface);
  box-shadow: 3px 3px 0 var(--ink);
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  flex: 0 0 2px;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--ink);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px 20px;
  border-top: 2.5px solid var(--border);
  background: var(--bg);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  box-shadow: 0 8px 0 var(--ink);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 10px 4px;
  font-weight: 700;
  color: var(--ink-soft);
  border-bottom: 2px solid var(--bg-soft);
}
.mobile-nav a.active { color: var(--brand); }
.mobile-nav .btn { margin-top: 10px; align-self: flex-start; }

@media (max-width: 860px) {
  .main-nav { display: none; }
  .site-header .btn-sm { display: none; }
  .nav-toggle { display: flex; }
}

@media (min-width: 861px) {
  .mobile-nav { display: none !important; }
}

@media (max-width: 640px) {
  .palier-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 36px; }
  section { padding: 40px 0; }
}