/* ============================================================
   le réel — feuille de style
   Inspiration : clarté "Stripe", fond clair, encre bleu nuit,
   dégradé incliné, grotesque net.
   ============================================================ */

:root {
  --ink:        #0a2540;   /* bleu nuit — texte principal */
  --ink-soft:   #425466;   /* texte secondaire */
  --ink-faint:  #8792a2;   /* légendes */
  --line:       #e6e9ef;
  --bg:         #ffffff;
  --bg-muted:   #f6f9fc;
  --primary:    #5b54e6;   /* indigo */
  --primary-dk: #4038c9;
  --accent-cy:  #22d3ee;
  --accent-pk:  #ff7ac6;
  --accent-am:  #ffcf6b;
  --radius:     14px;
  --radius-lg:  22px;
  --shadow-sm:  0 2px 6px rgba(10,37,64,.06), 0 1px 2px rgba(10,37,64,.08);
  --shadow-md:  0 12px 34px -8px rgba(10,37,64,.18), 0 4px 12px -4px rgba(10,37,64,.10);
  --shadow-lg:  0 40px 80px -24px rgba(10,37,64,.28);
  --font-display: "Schibsted Grotesk", "Hanken Grotesk", system-ui, sans-serif;
  --font-body:    "Hanken Grotesk", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;
  --maxw: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}

h1 { font-size: clamp(2.15rem, 6.2vw, 4.6rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.7rem); }
h3 { font-size: 1.28rem; letter-spacing: -0.01em; }

p { margin: 0 0 1rem; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.sr-only, .skip-link {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link:focus {
  position: fixed; top: 12px; left: 12px; width: auto; height: auto;
  clip: auto; background: var(--ink); color: #fff; padding: 10px 16px;
  border-radius: 8px; z-index: 200;
}

/* ---------- Boutons ---------- */
.btn {
  --pad-y: .72rem; --pad-x: 1.15rem;
  display: inline-flex; align-items: center; gap: .5rem;
  padding: var(--pad-y) var(--pad-x);
  font-family: var(--font-display);
  font-weight: 600; font-size: .98rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn span { transition: transform .18s ease; }
.btn:hover span { transform: translateX(3px); }

.btn-solid { background: var(--primary); color: #fff; box-shadow: 0 8px 20px -6px rgba(91,84,230,.55); }
.btn-solid:hover { background: var(--primary-dk); transform: translateY(-2px); box-shadow: 0 14px 28px -8px rgba(91,84,230,.6); }

.btn-outline { background: #fff; color: var(--ink); border-color: var(--line); box-shadow: var(--shadow-sm); }
.btn-outline:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: #d3d9e4; }

.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { color: var(--primary); }

.btn-outline.btn-lg, .btn-solid.btn-lg { --pad-y: .95rem; --pad-x: 1.5rem; font-size: 1.05rem; }
.btn-block { display: flex; justify-content: center; width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled { border-color: var(--line); box-shadow: 0 1px 0 rgba(10,37,64,.04); }

.header-inner {
  display: flex; align-items: center; gap: 1.5rem;
  height: 68px;
}

.brand { display: inline-flex; align-items: center; gap: .55rem; font-family: var(--font-display); font-weight: 800; letter-spacing: -0.03em; font-size: 1.15rem; }
.brand-mark {
  width: 20px; height: 20px; border-radius: 6px;
  background: conic-gradient(from 210deg, var(--accent-cy), var(--primary), var(--accent-pk), var(--accent-am), var(--accent-cy));
  box-shadow: 0 3px 10px -2px rgba(91,84,230,.5);
}
.brand-name { color: var(--ink); }

.nav-desktop { display: flex; gap: 1.4rem; margin-right: auto; }
.nav-desktop a {
  font-family: var(--font-display); font-weight: 500; font-size: .98rem;
  color: var(--ink-soft); position: relative; padding: .3rem 0;
}
.nav-desktop a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--primary); transition: width .22s ease;
}
.nav-desktop a:hover { color: var(--ink); }
.nav-desktop a:hover::after { width: 100%; }

.header-cta { display: flex; align-items: center; gap: .4rem; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; padding: 8px; cursor: pointer; margin-left: auto;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .25s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: flex; flex-direction: column; gap: .25rem;
  padding: 12px 24px 22px;
  border-top: 1px solid var(--line);
  background: #fff;
}
.mobile-menu a {
  font-family: var(--font-display); font-weight: 500; font-size: 1.05rem;
  padding: .8rem .25rem; color: var(--ink); border-bottom: 1px solid var(--line);
}
.mobile-menu a:last-child { border: 0; margin-top: .8rem; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(5rem, 12vw, 9rem); }
.hero-gradient {
  position: absolute; inset: -20% -8% 0 -8%;
  background:
    radial-gradient(60% 55% at 12% 8%, rgba(34,211,238,.30), transparent 60%),
    radial-gradient(55% 60% at 88% 0%, rgba(255,122,198,.28), transparent 62%),
    radial-gradient(70% 70% at 60% 100%, rgba(91,84,230,.22), transparent 60%),
    linear-gradient(180deg, #f3f6ff 0%, #ffffff 70%);
  transform: skewY(-7deg);
  transform-origin: top left;
  z-index: -1;
}
.hero-gradient::after {
  content: ""; position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  mix-blend-mode: overlay; opacity: .5;
}

.hero-inner { position: relative; max-width: 900px; }
.eyebrow {
  font-family: var(--font-mono); font-size: .82rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--primary); font-weight: 500; margin-bottom: 1.1rem;
}
.eyebrow-light { color: rgba(255,255,255,.8); }

.hero h1 { margin-bottom: 1.6rem; }
.grad-text {
  background: linear-gradient(100deg, var(--primary) 10%, var(--accent-pk) 55%, var(--accent-am));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { font-size: clamp(1.1rem, 2vw, 1.32rem); color: var(--ink-soft); max-width: 40ch; margin-bottom: 2.2rem; }
.lede strong { color: var(--ink); font-weight: 600; }

.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-bottom: 3.2rem; }

.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem;
  margin: 0; padding-top: 2rem; border-top: 1px solid var(--line); max-width: 640px;
}
.hero-stats dt { font-family: var(--font-display); font-weight: 700; color: var(--ink); margin-bottom: .15rem; }
.hero-stats dd { margin: 0; font-size: .95rem; color: var(--ink-faint); line-height: 1.4; }

/* ---------- Sections ---------- */
.section { padding: clamp(3.5rem, 8vw, 6.5rem) 0; }
.section-muted { background: var(--bg-muted); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 620px; margin-bottom: 3rem; }
.section-head p { color: var(--ink-soft); font-size: 1.08rem; margin: .8rem 0 0; }
.section-head-row { display: flex; align-items: end; justify-content: space-between; gap: 1rem; max-width: none; }

/* ---------- Cartes piliers ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 2rem 1.7rem; box-shadow: var(--shadow-sm);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #dfe4ee; }
.card-icon {
  display: inline-grid; place-items: center; width: 44px; height: 44px;
  border-radius: 12px; background: linear-gradient(150deg, #eef0ff, #f7edff);
  color: var(--primary); font-size: 1.1rem; margin-bottom: 1.1rem;
}
.card h3 { margin-bottom: .5rem; }
.card p { color: var(--ink-soft); font-size: .98rem; margin-bottom: 1.2rem; }
.card-link { font-family: var(--font-display); font-weight: 600; color: var(--primary); font-size: .95rem; }
.card-link:hover { color: var(--primary-dk); }

/* ---------- Bande inclinée ---------- */
.skew-band {
  position: relative; margin: clamp(2rem, 6vw, 4.5rem) 0;
  background: linear-gradient(115deg, #0a2540 0%, #1a2c6b 45%, var(--primary) 100%);
  padding: clamp(4rem, 9vw, 6.5rem) 0;
  overflow: hidden;
}
.skew-band::before, .skew-band::after {
  content: ""; position: absolute; left: -5%; right: -5%; height: 90px;
  background: inherit;
}
.skew-band::before { top: -45px; transform: skewY(-2.4deg); }
.skew-band::after  { bottom: -45px; transform: skewY(-2.4deg); }
.skew-content { position: relative; text-align: center; max-width: 760px; }
.skew-band blockquote {
  margin: .6rem 0 0; font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem); line-height: 1.2; letter-spacing: -0.02em;
  color: #fff;
}
.skew-band blockquote span {
  display: block; margin-top: 1rem; font-weight: 400; font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: rgba(255,255,255,.72); font-family: var(--font-body); letter-spacing: 0;
}

/* ---------- Feature split (Six Sigma) ---------- */
.feature-split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.feature-copy h2 { margin: .4rem 0 1rem; }
.feature-copy > p { color: var(--ink-soft); font-size: 1.05rem; }
.check-list { list-style: none; margin: 1.4rem 0 2rem; padding: 0; display: grid; gap: .7rem; }
.check-list li { position: relative; padding-left: 1.9rem; color: var(--ink); font-size: 1rem; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 1.3rem; height: 1.3rem; display: grid; place-items: center;
  background: #e9e7ff; color: var(--primary); border-radius: 6px; font-size: .8rem; font-weight: 700;
}

.feature-visual { perspective: 1400px; }
.mock {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  box-shadow: var(--shadow-lg); overflow: hidden;
  transform: rotateY(-9deg) rotateX(3deg); transform-style: preserve-3d;
  transition: transform .4s ease;
}
.feature-visual:hover .mock { transform: rotateY(-3deg) rotateX(1deg); }
.mock-bar {
  display: flex; align-items: center; gap: 6px; padding: 12px 16px;
  background: var(--bg-muted); border-bottom: 1px solid var(--line);
}
.mock-bar span { width: 10px; height: 10px; border-radius: 50%; background: #d7dce6; }
.mock-bar span:nth-child(1) { background: #ff6b6b; }
.mock-bar span:nth-child(2) { background: var(--accent-am); }
.mock-bar span:nth-child(3) { background: #4ade80; }
.mock-bar em {
  margin-left: auto; font-style: normal; font-family: var(--font-mono);
  font-size: .72rem; color: var(--ink-faint);
}
.mock-body { padding: 22px 20px 26px; }
.mock-q { font-family: var(--font-mono); font-size: .8rem; color: var(--primary); margin-bottom: .6rem; }
.mock-q b { color: var(--ink); }
.mock-text { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; margin-bottom: 1.1rem; }
.mock-opt {
  border: 1px solid var(--line); border-radius: 10px; padding: .7rem .9rem;
  margin-bottom: .55rem; font-size: .92rem; color: var(--ink-soft);
}
.mock-opt.is-right { border-color: var(--primary); background: #f3f2ff; color: var(--ink); font-weight: 600; }
.mock-progress { margin-top: 1rem; height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; }
.mock-progress i { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent-pk)); }

/* ---------- Posts ---------- */
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.post {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.7rem 1.5rem; box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.post:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.post-tag {
  display: inline-block; font-family: var(--font-mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .08em; color: var(--primary);
  background: #f0efff; padding: .25rem .55rem; border-radius: 6px; margin-bottom: .9rem;
}
.post h3 { font-size: 1.1rem; margin-bottom: .5rem; }
.post p { color: var(--ink-soft); font-size: .93rem; margin-bottom: 1rem; }
.post-meta { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-faint); }

/* ---------- CTA communauté ---------- */
.cta-card {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0a2540, #26307a);
  border-radius: var(--radius-lg); padding: clamp(2.5rem, 6vw, 4.5rem);
  text-align: center; color: #fff;
}
.cta-glow {
  position: absolute; width: 480px; height: 480px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,122,198,.5), transparent 65%);
  top: -220px; right: -120px; filter: blur(20px);
}
.cta-card h2 { color: #fff; }
.cta-card > p { color: rgba(255,255,255,.75); max-width: 46ch; margin: 1rem auto 2rem; position: relative; }
.cta-form {
  display: flex; gap: .6rem; max-width: 460px; margin: 0 auto; position: relative;
}
.cta-form input {
  flex: 1; padding: .9rem 1.1rem; border-radius: 999px; border: 1px solid rgba(255,255,255,.25);
  background: rgba(255,255,255,.08); color: #fff; font-family: var(--font-body); font-size: 1rem;
}
.cta-form input::placeholder { color: rgba(255,255,255,.5); }
.cta-form input:focus { outline: 2px solid var(--accent-pk); outline-offset: 1px; }
.cta-fine { margin: 1rem 0 0; font-size: .82rem; color: rgba(255,255,255,.55); position: relative; }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-muted); border-top: 1px solid var(--line); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; }
.footer-brand p { color: var(--ink-faint); font-size: .92rem; max-width: 30ch; margin-top: .9rem; }
.site-footer h4 { font-family: var(--font-display); font-size: .82rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-faint); margin-bottom: 1rem; }
.site-footer nav a { display: block; padding: .32rem 0; color: var(--ink-soft); font-size: .95rem; }
.site-footer nav a:hover { color: var(--primary); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--line);
}
.footer-bottom p { margin: 0; font-size: .85rem; color: var(--ink-faint); }
.footer-mono { font-family: var(--font-mono); }

/* ---------- Pages "à venir" ---------- */
.page-hero { padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2rem, 5vw, 3.5rem); position: relative; }
.page-hero::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 100%;
  background: radial-gradient(50% 90% at 15% 0%, rgba(91,84,230,.10), transparent 70%);
  z-index: -1;
}
.page-hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin-bottom: 1rem; }
.page-hero .lede { max-width: 52ch; }
.breadcrumb { font-family: var(--font-mono); font-size: .8rem; color: var(--ink-faint); margin-bottom: 1.4rem; }
.breadcrumb a { color: var(--primary); }
.badge-soon {
  display: inline-block; font-family: var(--font-mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .1em; color: var(--primary);
  background: #f0efff; border: 1px solid #dedcff; padding: .3rem .6rem;
  border-radius: 999px; margin-bottom: 1.2rem;
}
.page-body { padding-bottom: clamp(4rem, 10vw, 7rem); }
.page-body h2 { margin: 2.5rem 0 1rem; }
.page-body ul { padding-left: 1.2rem; color: var(--ink-soft); }
.page-body li { margin-bottom: .5rem; }
.back-link { font-family: var(--font-display); font-weight: 600; color: var(--primary); }

/* ---------- Reveal on load / scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); transition-delay: calc(var(--d, 0) * 90ms); }

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.in { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .mock { transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .cards, .posts { grid-template-columns: 1fr 1fr; }
  .feature-split { grid-template-columns: 1fr; }
  .feature-visual { order: -1; max-width: 460px; }
  .mock { transform: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 800px) {
  .nav-desktop, .header-cta { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .cards, .posts { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; gap: 1rem; }
  .section-head-row { flex-direction: column; align-items: flex-start; }
  .cta-form { flex-direction: column; }
  .cta-form .btn { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.6rem; }
  .footer-bottom { flex-direction: column; gap: .5rem; text-align: center; }
}

/* ============================================================
   Apprendre le Lean / Six Sigma
   ============================================================ */

/* ---------- Menu déroulant "Apprendre" ---------- */
.nav-desktop { align-items: center; }
.nav-item { position: relative; display: flex; align-items: center; }
.nav-item.has-sub > a { display: inline-flex; align-items: center; gap: .3rem; }
.nav-caret { font-size: .7em; transition: transform .2s ease; }
.nav-item.has-sub:hover .nav-caret,
.nav-item.has-sub:focus-within .nav-caret { transform: rotate(180deg); }

.nav-sub {
  position: absolute; top: calc(100% + 2px); left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 260px; background: #fff;
  border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow-md); padding: .5rem;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  z-index: 130;
}
.nav-sub::before { content: ""; position: absolute; left: 0; right: 0; top: -12px; height: 12px; }
.nav-item.has-sub:hover .nav-sub,
.nav-item.has-sub:focus-within .nav-sub {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-sub a {
  display: block; padding: .58rem .7rem; border-radius: 9px;
  font-size: .92rem; font-weight: 500; color: var(--ink-soft); white-space: nowrap;
}
.nav-sub a::after { display: none; }
.nav-sub a:hover { background: var(--bg-muted); color: var(--ink); }

.mobile-menu .mm-sub {
  padding-left: 1.4rem; font-size: .96rem; color: var(--ink-soft);
}

/* ---------- Page programme ---------- */
.learn-phase { margin-top: 3rem; }
.learn-phase-head { display: flex; align-items: baseline; gap: .9rem; margin-bottom: 1.3rem; flex-wrap: wrap; }
.learn-phase-head .tag {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--primary);
  background: #f0efff; border: 1px solid #dedcff; padding: .28rem .55rem; border-radius: 999px;
}
.learn-phase-head p { margin: 0; color: var(--ink-faint); font-size: .95rem; }

.rubrique-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.rubrique {
  display: flex; flex-direction: column; gap: .5rem;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.2rem 1.3rem; box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
a.rubrique:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #d9deea; }
.rubrique .code { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-faint); }
.rubrique h3 { font-size: 1.05rem; }
.rubrique p { margin: 0; font-size: .92rem; color: var(--ink-soft); }
.rubrique .state {
  margin-top: auto; font-family: var(--font-mono); font-size: .74rem;
  letter-spacing: .06em; text-transform: uppercase;
}
.rubrique .state.ok { color: #16a34a; }
.rubrique .state.soon { color: var(--ink-faint); }
.rubrique.is-disabled { opacity: .68; }

/* ---------- Page contenu (rubrique) ---------- */
.learn-layout {
  display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 3.5rem;
  align-items: start; padding: 2.5rem 0 clamp(4rem, 10vw, 7rem);
}
.learn-layout > * { min-width: 0; }
.learn-toc { position: sticky; top: 88px; }
.learn-toc h4 {
  font-family: var(--font-display); font-size: .78rem; text-transform: uppercase;
  letter-spacing: .1em; color: var(--ink-faint); margin-bottom: .9rem;
}
.learn-toc a {
  display: block; padding: .4rem 0 .4rem .9rem; font-size: .9rem;
  color: var(--ink-soft); border-left: 2px solid var(--line); line-height: 1.4;
}
.learn-toc a:hover, .learn-toc a.is-active { color: var(--primary); border-color: var(--primary); }

.prose { max-width: 46rem; }
.prose h2 {
  font-size: 1.55rem; margin: 3rem 0 1rem; padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.prose h2:first-of-type { border-top: 0; padding-top: 0; margin-top: 0; }
.prose h3 { font-size: 1.12rem; margin: 2rem 0 .8rem; }
.prose p { color: var(--ink-soft); }
.prose ul { padding-left: 1.2rem; color: var(--ink-soft); margin: 0 0 1.2rem; }
.prose li { margin-bottom: .4rem; }
.prose li > ul { margin-top: .4rem; margin-bottom: .4rem; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose .src {
  font-family: var(--font-mono); font-size: .78rem; color: var(--ink-faint);
  margin: .4rem 0 0;
}
.prose figure { margin: 1.4rem 0; }
.prose pre {
  background: #0a2540; color: #e8ecf4; border-radius: var(--radius);
  padding: 1.1rem 1.3rem; overflow-x: auto; max-width: 100%; font-family: var(--font-mono);
  font-size: .85rem; line-height: 1.5;
}
.table-scroll { overflow-x: auto; max-width: 100%; margin: 1.4rem 0; }
.prose table {
  border-collapse: collapse; width: 100%; font-size: .9rem;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.prose th, .prose td {
  border: 1px solid var(--line); padding: .55rem .7rem; text-align: center;
}
.prose th { background: var(--bg-muted); font-family: var(--font-display); color: var(--ink); }
.prose td:first-child, .prose th:first-child { text-align: left; }

.callout {
  background: var(--bg-muted); border: 1px solid var(--line);
  border-left: 3px solid var(--primary); border-radius: var(--radius);
  padding: 1rem 1.2rem; margin: 1.6rem 0;
}
.callout p:last-child { margin-bottom: 0; }

.learn-nav {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .learn-layout { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .learn-toc { position: static; }
  .learn-toc a { display: inline-block; border-left: 0; padding: .3rem .6rem; }
  .rubrique-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   QCM / quiz
   ============================================================ */
.quiz { max-width: 42rem; margin: 0 auto; padding: 2.5rem 0 clamp(4rem, 10vw, 7rem); }

.quiz-top { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.6rem; }
.quiz-count { font-family: var(--font-mono); font-size: .82rem; color: var(--ink-faint); white-space: nowrap; }
.quiz-bar { flex: 1; height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; }
.quiz-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--primary), var(--accent-pk)); transition: width .35s ease; }

.quiz-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: clamp(1.4rem, 4vw, 2rem);
}
.quiz-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.quiz-tag {
  font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--ink-soft); background: var(--bg-muted); border: 1px solid var(--line);
  padding: .25rem .55rem; border-radius: 999px;
}
.quiz-tag.piege { color: #b45309; background: #fff7ed; border-color: #fed7aa; }

.quiz-q { font-family: var(--font-display); font-weight: 600; font-size: 1.15rem; line-height: 1.4; margin-bottom: 1.3rem; }

.quiz-options { display: grid; gap: .6rem; margin: 0; padding: 0; list-style: none; }
.quiz-opt {
  display: flex; gap: .75rem; align-items: flex-start;
  width: 100%; text-align: left; font: inherit; color: var(--ink);
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: .85rem 1rem; cursor: pointer;
  transition: border-color .15s ease, background .15s ease, transform .12s ease;
}
.quiz-opt:hover:not(:disabled) { border-color: #c7cdda; transform: translateY(-1px); }
.quiz-opt:disabled { cursor: default; }
.quiz-opt .mark {
  flex: none; width: 1.4rem; height: 1.4rem; border-radius: 50%;
  border: 1px solid var(--ink-faint); display: grid; place-items: center;
  font-size: .8rem; font-weight: 700; color: var(--ink-soft);
}
.quiz-opt.is-selected { border-color: var(--primary); background: #f3f2ff; }
.quiz-opt.is-selected .mark { border-color: var(--primary); background: var(--primary); color: #fff; }
.quiz-opt.is-correct { border-color: #16a34a; background: #f0fdf4; }
.quiz-opt.is-correct .mark { border-color: #16a34a; background: #16a34a; color: #fff; }
.quiz-opt.is-wrong { border-color: #dc2626; background: #fef2f2; }
.quiz-opt.is-wrong .mark { border-color: #dc2626; background: #dc2626; color: #fff; }

.quiz-feedback { margin-top: 1.2rem; border-radius: 12px; padding: 1rem 1.2rem; font-size: .95rem; border: 1px solid var(--line); }
.quiz-feedback.ok { background: #f0fdf4; border-color: #bbf7d0; }
.quiz-feedback.ko { background: #fef2f2; border-color: #fecaca; }
.quiz-feedback strong { display: block; font-family: var(--font-display); margin-bottom: .35rem; }
.quiz-feedback p { margin: 0 0 .5rem; color: var(--ink); }
.quiz-feedback .src { font-family: var(--font-mono); font-size: .76rem; color: var(--ink-faint); margin: 0; }

.quiz-actions { display: flex; justify-content: flex-end; gap: .7rem; margin-top: 1.4rem; }

/* Écran de résultat */
.quiz-result { text-align: center; }
.quiz-score {
  width: 128px; height: 128px; border-radius: 50%; margin: 0 auto 1.4rem;
  display: grid; place-items: center; font-family: var(--font-display); font-weight: 800;
  font-size: 1.8rem; color: var(--ink);
  background: conic-gradient(var(--primary) var(--pct, 0%), var(--line) 0);
}
.quiz-score span { background: #fff; width: 104px; height: 104px; border-radius: 50%; display: grid; place-items: center; }
.quiz-result h2 { margin-bottom: .5rem; }
.quiz-result > p { color: var(--ink-soft); }

.quiz-recap { text-align: left; margin: 1.8rem 0; display: grid; gap: .5rem; }
.quiz-recap-item {
  display: flex; gap: .7rem; align-items: baseline;
  padding: .7rem .9rem; border: 1px solid var(--line); border-radius: 10px; font-size: .92rem;
}
.quiz-recap-item .dot { flex: none; width: .7rem; height: .7rem; border-radius: 50%; }
.quiz-recap-item.ok .dot { background: #16a34a; }
.quiz-recap-item.ko .dot { background: #dc2626; }

/* ---------- Formules / code inline dans .prose ---------- */
.prose :not(pre) > code {
  font-family: var(--font-mono); font-size: .88em;
  background: var(--bg-muted); border: 1px solid var(--line);
  border-radius: 6px; padding: .08em .35em;
}
.prose .formula {
  font-family: var(--font-mono); font-size: .95rem;
  background: var(--bg-muted); border: 1px solid var(--line);
  border-left: 3px solid var(--primary); border-radius: var(--radius);
  padding: .8rem 1.1rem; margin: 1rem 0;
  max-width: 100%; overflow-x: auto; overflow-wrap: anywhere;
}
.prose .formula b { color: var(--primary); font-weight: 600; }

.prose figure img {
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); background: #fff;
}
.prose figcaption { text-align: left; }

/* ---------- Lightbox (zoom plein écran) ---------- */
.prose figure img { cursor: zoom-in; }

.lightbox {
  position: fixed; inset: 0; z-index: 999;
  display: grid; place-items: center; padding: 4vmin;
  background: rgba(10, 37, 64, .93);
  backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px);
  cursor: zoom-out; opacity: 0; transition: opacity .2s ease;
}
.lightbox.is-open { opacity: 1; }
.lightbox img {
  max-width: 92vw; max-height: 90vh; width: auto; height: auto;
  object-fit: contain;
  border-radius: 10px; box-shadow: var(--shadow-lg);
  transform: scale(.97); transition: transform .2s ease;
}
.lightbox.is-open img { transform: scale(1); }
.lightbox-close {
  position: fixed; top: 1rem; right: 1.2rem;
  width: 44px; height: 44px; border-radius: 50%;
  border: 0; background: rgba(255, 255, 255, .16); color: #fff;
  font-size: 1.7rem; line-height: 1; cursor: pointer;
  transition: background .15s ease;
}
.lightbox-close:hover { background: rgba(255, 255, 255, .28); }
.lightbox-close:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  .lightbox, .lightbox img, .lightbox.is-open img { transition: none; transform: none; }
}

/* ============================================================
   Flashcards
   ============================================================ */
.flashcards { margin: 1.8rem 0; }

.fc-top { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; }
.fc-count { font-family: var(--font-mono); font-size: .82rem; color: var(--ink-faint); white-space: nowrap; }
.fc-dots { display: flex; gap: .4rem; margin-left: auto; }
.fc-dot {
  width: 9px; height: 9px; border-radius: 50%; padding: 0;
  background: var(--line); border: 0; cursor: pointer; transition: background .15s ease, transform .15s ease;
}
.fc-dot:hover { transform: scale(1.25); }
.fc-dot.is-current { background: var(--primary); }
.fc-dot.is-seen { background: #c7c3f5; }

.fc-card { perspective: 1600px; }
.fc-inner {
  display: grid; position: relative;
  transform-style: preserve-3d; transition: transform .5s cubic-bezier(.2, .7, .2, 1);
  cursor: pointer; border-radius: var(--radius-lg);
}
.fc-card.is-flipped .fc-inner { transform: rotateY(180deg); }
.fc-inner:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }

.fc-face {
  grid-area: 1 / 1;
  display: flex; flex-direction: column; min-height: 13rem;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: clamp(1.3rem, 4vw, 2rem);
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
}
.fc-face-back { transform: rotateY(180deg); background: var(--bg-muted); }

.fc-tag-row { display: flex; gap: .5rem; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; }
.fc-kicker {
  font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase;
  letter-spacing: .09em; color: var(--ink-faint);
}
.fc-piege {
  font-family: var(--font-mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .06em;
  color: #b45309; background: #fff7ed; border: 1px solid #fed7aa; padding: .22rem .5rem; border-radius: 999px;
}

.fc-q { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.05rem, 2.3vw, 1.28rem); line-height: 1.4; color: var(--ink); }
.fc-hint { margin-top: auto; padding-top: 1.2rem; font-family: var(--font-mono); font-size: .78rem; color: var(--ink-faint); }

.fc-a { font-size: .98rem; color: var(--ink); }
.fc-a p { margin: 0 0 .7rem; }
.fc-a p:last-child { margin-bottom: 0; }
.fc-a ul { padding-left: 1.15rem; margin: .5rem 0 .7rem; }
.fc-a li { margin-bottom: .3rem; }
.fc-note {
  margin-top: 1rem; padding-top: .9rem; border-top: 1px solid var(--line);
  font-size: .9rem; color: var(--ink-soft);
}
.fc-src { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-faint); margin-top: .7rem; }

.fc-actions { display: flex; align-items: center; gap: .6rem; margin-top: 1rem; flex-wrap: wrap; }
.fc-actions .spacer { flex: 1; }
.fc-btn {
  font-family: var(--font-display); font-weight: 600; font-size: .9rem;
  padding: .55rem .95rem; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  transition: border-color .15s ease, background .15s ease, transform .12s ease;
}
.fc-btn:hover { border-color: #c7cdda; transform: translateY(-1px); }
.fc-btn[disabled] { opacity: .45; cursor: default; transform: none; }
.fc-btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.fc-btn-primary:hover { background: var(--primary-dk); border-color: var(--primary-dk); }

@media (prefers-reduced-motion: reduce) {
  .fc-inner { transition: none; }
}