/* ============================================================
   Robin Dualé · Conseil IA
   Design system — blanc / bleu nuit / bronze
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,700;1,400;1,500&family=Inter:wght@300;400;500;600&display=swap');

/* === Variables === */
:root {
  --navy:        #1B3054;
  --navy-dark:   #12213B;
  --navy-mid:    #2A4A7F;
  --navy-tint:   rgba(27, 48, 84, 0.06);

  --bronze:      #A8804A;
  --bronze-bg:   #F5EEE2;
  --bronze-fade: rgba(168, 128, 74, 0.18);

  --white:       #FFFFFF;
  --off-white:   #F9F8F6;
  --ink:         #111827;
  --ink-70:      rgba(17, 24, 39, 0.70);
  --ink-45:      rgba(17, 24, 39, 0.45);
  --ink-20:      rgba(17, 24, 39, 0.20);
  --ink-08:      rgba(17, 24, 39, 0.08);

  --serif:       'Playfair Display', Georgia, serif;
  --sans:        'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --max-w:       1100px;
  --pad-x:       40px;
  --nav-h:       68px;
  --section-y:   96px;
  --radius:      6px;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body { font-family: var(--sans); font-size: 16px; line-height: 1.6; color: var(--ink); background: var(--white); }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* === Container === */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ink-08);
  transition: box-shadow 0.25s;
}
.nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.07); }

.nav-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-logo {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.01em;
  flex-shrink: 0;
  margin-right: 44px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
}

.nav-link {
  font-size: 14px;
  font-weight: 400;
  color: var(--ink-70);
  letter-spacing: 0.01em;
  transition: color 0.2s;
}
.nav-link:hover, .nav-link.active { color: var(--navy); }
.nav-link.active { font-weight: 500; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
}

.lang-switcher {
  display: none;
}
.lang-btn {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ink-45);
  transition: color 0.2s;
  padding: 4px 2px;
}
.lang-btn.active { color: var(--navy); }
.lang-btn:hover { color: var(--navy); }
.lang-sep { font-size: 11px; color: var(--ink-20); }

.btn-nav {
  padding: 9px 22px;
  background: var(--navy);
  color: var(--white) !important;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius);
  transition: background 0.2s;
  white-space: nowrap;
}
.btn-nav:hover { background: var(--navy-dark); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 4px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  transition: all 0.25s;
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--navy);
  color: var(--white);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover { background: var(--navy-dark); transform: translateY(-1px); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  background: transparent;
  color: var(--navy);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  border: 1.5px solid rgba(27, 48, 84, 0.35);
  cursor: pointer;
  transition: all 0.2s;
}
.btn-outline:hover { background: var(--navy); color: var(--white); border-color: var(--navy); }

.btn-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  background: rgba(255,255,255,0.10);
  color: var(--white);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  border: 1.5px solid rgba(255,255,255,0.25);
  cursor: pointer;
  transition: all 0.2s;
}
.btn-light:hover { background: rgba(255,255,255,0.20); border-color: rgba(255,255,255,0.45); }

/* ============================================================
   SECTIONS — BASE
   ============================================================ */
.section { padding: var(--section-y) 0; }
.section-alt { background: var(--off-white); }
.section-navy { background: var(--navy-dark); color: var(--white); }

.section-eyebrow {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 16px;
}
.section-eyebrow-light { color: rgba(168, 128, 74, 0.75); }

.section-title {
  font-family: var(--serif);
  font-size: clamp(30px, 3.8vw, 44px);
  font-weight: 500;
  line-height: 1.2;
  color: var(--navy);
  margin-bottom: 20px;
}
.section-title em { font-style: italic; font-weight: 400; }
.section-title-light { color: var(--white); }

.section-intro {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-70);
  max-width: 580px;
}
.section-intro-light { color: rgba(255,255,255,0.72); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 80px 0 88px;
  background: var(--white);
  overflow: hidden;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 72px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 28px;
}
.hero-tag::before {
  content: '';
  display: block;
  width: 28px;
  height: 1.5px;
  background: var(--bronze);
  flex-shrink: 0;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(38px, 5vw, 60px);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--navy);
  margin-bottom: 28px;
}
.hero-title em { font-style: italic; font-weight: 400; color: var(--navy-mid); }

.hero-sub {
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink-70);
  max-width: 520px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: flex-end;
}

.hero-photo-wrap {
  position: relative;
  display: inline-block;
}

.hero-photo {
  width: 320px;
  height: 400px;
  object-fit: cover;
  object-position: top center;
  border-radius: 4px;
  display: block;
}

.hero-badge {
  position: absolute;
  bottom: 24px;
  left: -36px;
  background: var(--white);
  border: 1px solid var(--ink-08);
  border-radius: 8px;
  padding: 16px 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.10);
}
.hero-badge-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 6px;
}
.hero-badge-value {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  color: var(--navy);
  line-height: 1;
}
.hero-badge-sub {
  font-size: 12px;
  color: var(--ink-45);
  margin-top: 4px;
}

/* ============================================================
   SECTION ENJEU
   ============================================================ */
.enjeu-inner {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 80px;
  align-items: start;
}

.enjeu-points {
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding-top: 4px;
}

.enjeu-point {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.enjeu-num {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 400;
  color: var(--bronze);
  line-height: 1.1;
  flex-shrink: 0;
  width: 36px;
  padding-top: 2px;
}

.enjeu-point-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.4;
}

.enjeu-point-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-70);
}

/* ============================================================
   SECTION MISSIONS
   ============================================================ */
.missions-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}

.missions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.mission-card {
  background: var(--white);
  border: 1px solid var(--ink-08);
  border-radius: 8px;
  padding: 36px 32px;
  transition: box-shadow 0.25s, transform 0.2s, border-color 0.25s;
  cursor: default;
}
.mission-card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
  transform: translateY(-3px);
  border-color: rgba(27, 48, 84, 0.25);
}

.mission-icon {
  width: 44px;
  height: 44px;
  background: var(--navy-tint);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.mission-icon svg { stroke: var(--navy); }

.mission-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 12px;
  line-height: 1.3;
}

.mission-text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-70);
  margin-bottom: 18px;
}

.mission-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bronze);
  padding-top: 14px;
  border-top: 1px solid var(--ink-08);
  width: 100%;
}

/* ============================================================
   SECTION POURQUOI
   ============================================================ */
.pourquoi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 52px;
}

.pourquoi-card {
  padding-top: 24px;
  border-top: 2px solid var(--bronze);
}

.pourquoi-num {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  color: var(--bronze);
  line-height: 1;
  margin-bottom: 14px;
  opacity: 0.6;
}

.pourquoi-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  line-height: 1.4;
}

.pourquoi-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-70);
}

/* ============================================================
   SECTION TÉMOIGNAGES
   ============================================================ */
.temoignages-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 52px;
}

.temoignage-card {
  padding: 40px 36px 36px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.temoignage-open {
  position: absolute;
  top: 20px;
  left: 28px;
  font-family: var(--serif);
  font-size: 72px;
  line-height: 1;
  color: rgba(168, 128, 74, 0.18);
  pointer-events: none;
  user-select: none;
}

.temoignage-text {
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255,255,255,0.85);
  font-style: italic;
  margin-bottom: 28px;
  position: relative;
}

.temoignage-author {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.04em;
}

.temoignage-role {
  font-size: 12px;
  color: rgba(255,255,255,0.38);
  margin-top: 4px;
}

/* ============================================================
   SECTION PERSPECTIVES
   ============================================================ */
.perspectives-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}

.perspectives-link-all {
  font-size: 13px;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.03em;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}
.perspectives-link-all:hover { gap: 10px; }

.perspectives-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.article-card {
  display: block;
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--ink-08);
  transition: box-shadow 0.25s, transform 0.2s, border-color 0.25s;
}
.article-card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
  transform: translateY(-3px);
  border-color: rgba(27, 48, 84, 0.25);
}

.article-card-placeholder {
  height: 200px;
  background: linear-gradient(135deg, #E8EEF5 0%, #EDE6DA 100%);
}

.article-card-body {
  padding: 28px 28px 32px;
}

.article-card-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 12px;
}

.article-card-title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--navy);
  line-height: 1.35;
  margin-bottom: 12px;
}

.article-card-text {
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-70);
  margin-bottom: 22px;
}

.article-card-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.03em;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}
.article-card:hover .article-card-link { gap: 10px; }

/* ============================================================
   SECTION CTA CONTACT
   ============================================================ */
.cta-inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.cta-title {
  font-family: var(--serif);
  font-size: clamp(28px, 3.8vw, 42px);
  font-weight: 500;
  color: var(--navy);
  line-height: 1.25;
  margin-bottom: 18px;
}
.cta-title em { font-style: italic; font-weight: 400; }

.cta-sub {
  font-size: 16px;
  color: var(--ink-70);
  margin-bottom: 36px;
  line-height: 1.75;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.cta-email {
  font-size: 14px;
  color: var(--ink-45);
}
.cta-email a {
  color: var(--navy);
  font-weight: 500;
  border-bottom: 1px solid rgba(27,48,84,0.3);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}
.cta-email a:hover { border-color: var(--navy); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--ink-08);
  background: var(--white);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-copy {
  font-size: 13px;
  color: var(--ink-45);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
}
.footer-link {
  font-size: 13px;
  color: var(--ink-45);
  transition: color 0.2s;
}
.footer-link:hover { color: var(--navy); }

/* ============================================================
   PAGE EN CONSTRUCTION (stubs)
   ============================================================ */
.page-stub {
  min-height: calc(100vh - var(--nav-h) - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
}

.page-stub-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 16px;
}

.page-stub-title {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 16px;
}

.page-stub-text {
  font-size: 16px;
  color: var(--ink-70);
  margin-bottom: 32px;
  max-width: 400px;
}

.page-stub-back {
  font-size: 14px;
  font-weight: 500;
  color: var(--navy);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  :root { --pad-x: 28px; --section-y: 72px; }
  .pourquoi-grid { grid-template-columns: 1fr 1fr; gap: 24px 32px; }
  .hero-inner { grid-template-columns: 1fr 340px; gap: 48px; }
  .hero-photo { width: 280px; height: 360px; }
}

@media (max-width: 768px) {
  :root { --pad-x: 20px; --section-y: 56px; }

  .nav-links, .nav-right { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--white);
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--ink-08);
    box-shadow: 0 8px 24px rgba(0,0,0,0.10);
    z-index: 99;
  }
  .nav-links.open .nav-link {
    padding: 16px 0;
    border-bottom: 1px solid var(--ink-08);
    font-size: 15px;
    color: var(--ink);
  }
  .nav-right.open {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
  }

  .hero-inner { grid-template-columns: 1fr; gap: 0; }
  .hero-visual { display: none; }
  .hero-title { font-size: 36px; }

  .enjeu-inner { grid-template-columns: 1fr; gap: 48px; }

  .missions-header { flex-direction: column; align-items: flex-start; }
  .missions-grid { grid-template-columns: 1fr; }

  .pourquoi-grid { grid-template-columns: 1fr 1fr; }

  .temoignages-grid { grid-template-columns: 1fr; }
  .perspectives-header { flex-direction: column; align-items: flex-start; }
  .perspectives-grid { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-links { flex-wrap: wrap; gap: 16px; }
}

@media (max-width: 480px) {
  .pourquoi-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .cta-actions { flex-direction: column; }
}