:root {
      --bg: #FAFBFC; 
      --surface: #FFFFFF;
      --ink: #0F172A;
      --ink-soft: #64748B;
      --blue: #3B82F6;
      --blue-ink: #1E40AF;
      --blue-soft: #EFF6FF;
      --blue-glow: rgba(59, 130, 246, 0.3);
      --green: #10B981;
      --green-soft: #ECFDF5;
      --red-soft: #FEF2F2;
      --red: #EF4444;
      --line: #E2E8F0;
      --font-display: 'Outfit', sans-serif;
      --font-body: 'DM Sans', sans-serif;
    }
    
    * { box-sizing: border-box; margin: 0; padding: 0; }
    
    body { 
      font-family: var(--font-body);
      background: var(--bg);
      color: var(--ink);
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }
    
    /* HEADER */
    header {
      padding: 24px 40px;
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      max-width: 1200px;
      margin: 0 auto;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--ink);
      font-family: var(--font-display);
      font-weight: 800;
      font-size: 22px;
      letter-spacing: -0.02em;
    }
    
    .logo img { width: 36px; height: auto; }
    
    .btn-login {
      background: transparent;
      border: 1.5px solid #E2E8F0;
      border-radius: 99px;
      padding: 10px 24px;
      color: var(--ink-soft);
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.2s ease;
      text-decoration: none;
    }
    
    .btn-login:hover {
      border-color: var(--ink);
      color: var(--ink);
      background: var(--surface);
    }
    
    /* HERO SECTION */
    .hero {
      text-align: center;
      padding: 80px 40px 60px;
      max-width: 900px;
      margin: 0 auto;
    }
    
    /* Badge très contrasté */
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 20px;
      /* --blue-ink et non --blue : du blanc sur #3B82F6 ne donne que 3,68:1, sous le
         seuil WCAG de 4,5:1. Corrige le 26/08/2026. */
      background: var(--blue-ink);
      color: white;
      border-radius: 99px;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 28px;
      box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
    }
    
    .hero h1 {
      font-family: var(--font-display);
      font-size: clamp(32px, 5vw, 48px);
      font-weight: 800;
      color: var(--ink);
      line-height: 1.1;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
    }
    
    .hero h1 .highlight {
      color: var(--blue);
    }
    
    .hero p {
      font-size: 18px;
      color: var(--ink-soft);
      line-height: 1.7;
      max-width: 650px;
      margin: 0 auto 32px;
    }
    
    .hero-cta {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      padding: 16px 32px;
      background: var(--blue-ink);
      color: white;
      border-radius: 12px;
      text-decoration: none;
      font-weight: 700;
      font-size: 16px;
      transition: all 0.3s ease;
      margin-top: 16px;
    }
    
    .hero-cta:hover {
      background: #1E3A8A;
      transform: translateY(-2px);
      box-shadow: 0 12px 24px -8px var(--blue-glow);
    }

    /* VIDÉO HERO (voix off, 10/09/2026) — click-to-play : le son n'est autorisé
       par les navigateurs que sur un geste utilisateur, jamais en autoplay. */
    .hero-video {
      position: relative;
      max-width: 720px;
      margin: 48px auto 0;
      border-radius: 16px;
      overflow: hidden;
      border: 1.5px solid var(--line);
      background: #0F172A;
      box-shadow: 0 14px 28px -16px var(--blue-glow);
      aspect-ratio: 16 / 9;
    }

    .hero-video video {
      display: block;
      width: 100%;
      height: 100%;
      object-fit: cover;
      cursor: pointer;
      background: #0F172A;
    }

    .hero-video-play {
      position: absolute;
      inset: 0;
      margin: auto;
      width: 76px;
      height: 76px;
      border-radius: 50%;
      border: none;
      background: var(--blue-ink);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      padding-left: 4px; /* recentre visuellement le triangle "play" */
      cursor: pointer;
      box-shadow: 0 12px 28px -6px rgba(15, 23, 42, 0.55), 0 0 0 10px rgba(255, 255, 255, 0.12);
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), background 0.2s ease;
    }

    .hero-video-play:hover {
      transform: scale(1.08);
      background: #1E3A8A;
    }

    .hero-video.is-playing .hero-video-play {
      display: none;
    }

    .hero-video.is-playing video {
      cursor: default;
    }

    .hero .hero-video-caption {
      margin: 56px auto 0;
      font-size: 15px;
      font-weight: 600;
      color: var(--ink-soft);
      text-align: center;
      max-width: none;
    }

    @media (max-width: 640px) {
      .hero-video {
        margin-top: 36px;
        border-radius: 12px;
      }
      .hero-video-play {
        width: 60px;
        height: 60px;
      }
    }

    /* SECTIONS */
    section {
      padding: 80px 40px;
      max-width: 1000px;
      margin: 0 auto;
    }
    
    .section-header {
      text-align: center;
      margin-bottom: 64px;
    }
    
    .section-header h2 {
      font-family: var(--font-display);
      font-size: clamp(28px, 4vw, 36px);
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }
    
    .section-header p {
      font-size: 17px;
      color: var(--ink-soft);
      max-width: 600px;
      margin: 0 auto;
      line-height: 1.6;
    }
    
    /* COMMENT ÇA MARCHE - 3 STEPS */
    .steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 32px;
    }
    
    .step {
      background: var(--surface);
      border-radius: 20px;
      padding: 40px 32px;
      text-align: left;
      border: 1.5px solid var(--line);
      transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
      overflow: hidden;
    }
    
    .step::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      border-radius: 20px;
      opacity: 0;
      transition: opacity 0.4s ease;
      pointer-events: none;
      background: radial-gradient(circle at top right, var(--blue-glow), transparent 65%);
    }
    
    .step:hover {
      transform: translateY(-6px);
      border-color: var(--blue);
      box-shadow: 0 20px 40px -10px var(--blue-glow);
    }
    
    .step:hover::before { opacity: 1; }
    
    .step-number {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      background: var(--blue-soft);
      color: var(--blue-ink);
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-display);
      font-weight: 800;
      font-size: 24px;
      margin-bottom: 24px;
      position: relative;
      z-index: 1;
    }
    
    .step h3 {
      font-family: var(--font-display);
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--ink);
      position: relative;
      z-index: 1;
    }
    
    .step p {
      font-size: 15px;
      color: var(--ink-soft);
      line-height: 1.7;
      position: relative;
      z-index: 1;
    }
    
    /* DIFFÉRENCIATION - CONTRASTE ACCENTUÉ */
    .differentiator {
      background: #FFFFFF;
      border-radius: 24px;
      padding: 56px 48px;
      margin: 0 auto;
      max-width: 900px;
      border: 2px solid var(--blue);
      box-shadow: 0 24px 48px -12px rgba(59, 130, 246, 0.15);
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    
    .differentiator::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 6px;
      background: linear-gradient(90deg, var(--blue), var(--green));
    }
    
    .differentiator h3 {
      font-family: var(--font-display);
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--ink);
    }
    
    .differentiator p {
      font-size: 17px;
      color: var(--ink-soft);
      line-height: 1.7;
      max-width: 600px;
      margin: 0 auto;
    }
    
    .differentiator .vs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 40px;
      text-align: left;
    }
    
    .vs-block {
      border-radius: 16px;
      padding: 28px;
      border: 1.5px solid transparent;
    }
    
    .vs-block.negative {
      background: var(--red-soft);
      border-color: #FECACA;
    }
    
    .vs-block.positive {
      background: var(--blue-soft);
      border-color: #BFDBFE;
      box-shadow: 0 10px 20px -5px rgba(59, 130, 246, 0.1);
    }
    
    .vs-block h4 {
      font-family: var(--font-display);
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .vs-block.negative h4 { color: #991B1B; }
    .vs-block.positive h4 { color: var(--blue-ink); }
    
    .vs-block ul {
      list-style: none;
      padding: 0;
    }
    
    .vs-block li {
      font-size: 15px;
      color: #334155;
      padding: 8px 0;
      display: flex;
      align-items: flex-start;
      gap: 10px;
      line-height: 1.5;
      font-weight: 500;
    }
    
    .vs-block li::before {
      flex-shrink: 0;
      font-size: 16px;
      font-weight: 700;
    }
    
    .vs-block.negative li::before { content: "✗"; color: var(--red); }
    .vs-block.positive li::before { content: "✓"; color: var(--blue-ink); }
    
    /* FAQ SECTION */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .faq-item {
      background: var(--surface);
      border-radius: 16px;
      margin-bottom: 16px;
      border: 1.5px solid var(--line);
      overflow: hidden;
      transition: all 0.3s ease;
    }
    
    .faq-item:hover {
      border-color: var(--blue);
    }
    
    /* <button> et non <div> depuis le 26/08/2026 : ces styles neutralisent l'apparence
       native du bouton tout en gardant le clavier, le focus et l'annonce vocale. */
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      font-family: inherit;
      text-align: left;
      padding: 24px 28px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-weight: 600;
      font-size: 16px;
      color: var(--ink);
      transition: all 0.2s ease;
    }
    
    .faq-question:hover {
      color: var(--blue-ink);
    }

    .faq-question:focus-visible {
      outline: 2px solid var(--blue-ink);
      outline-offset: -2px;
      border-radius: 12px;
    }
    nav a:hover {
  color: var(--green); /* ou var(--blue) selon la page */
}
    
    .faq-icon {
      width: 24px;
      height: 24px;
      flex-shrink: 0;
      transition: transform 0.3s ease;
    }
    
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    
    .faq-answer {
      padding: 0 28px;
      max-height: 0;
      overflow: hidden;
      transition: all 0.3s ease;
    }
    
    .faq-item.active .faq-answer {
      padding: 0 28px 24px;
      max-height: 500px;
    }
    
    .faq-answer p {
      font-size: 15px;
      color: var(--ink-soft);
      line-height: 1.7;
    }
    
    /* CTA FINAL */
    .cta-section {
      background: linear-gradient(135deg, var(--blue-soft) 0%, var(--green-soft) 100%);
      border-radius: 24px;
      padding: 64px 40px;
      text-align: center;
      margin: 40px auto 80px;
      max-width: 900px;
      border: 1.5px solid var(--line);
    }
    
    .cta-section h2 {
      font-family: var(--font-display);
      font-size: clamp(28px, 4vw, 36px);
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 16px;
    }
    
    .cta-section p {
      font-size: 17px;
      color: var(--ink-soft);
      margin-bottom: 32px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }
    
    /* FOOTER */
    footer {
      padding: 32px 40px;
      text-align: center;
      color: var(--ink-soft);
      font-size: 14px;
      border-top: 1.5px solid var(--line);
    }
    
    footer a {
      color: var(--blue-ink);
      text-decoration: none;
      font-weight: 600;
    }
    /* Lien Blog dans le header */
.nav-link-blog {
  color: var(--ink); /* Texte plus foncé pour un meilleur contraste */
  text-decoration: none;
  font-weight: 600;
  font-size: 15px; /* Légèrement plus grand */
  padding: 8px 12px; /* Un peu d'espace autour du texte */
  border-radius: 8px; /* Arrondi pour l'effet de survol */
  transition: all 0.2s ease;
}

.nav-link-blog:hover {
  background-color: #F1F5F9; /* Fond gris très clair au survol */
  color: var(--blue); 
}
    
    /* --- Position sur l'IA (08/09/2026) ---------------------------------
       Bloc volontairement plus sobre que .differentiator (qui reste le bloc
       fort de la page) : accent lateral + fond teinte, pas de bordure pleine
       ni d'ombre portee, pour ne pas creer deux blocs vedettes concurrents. */
    .ai-note {
      background: var(--surface);
      border: 1px solid var(--line);
      border-left: 5px solid var(--green);
      border-radius: 18px;
      padding: 40px 44px;
      max-width: 900px;
      margin: 0 auto;
    }
    .ai-note-badge {
      display: inline-block;
      background: var(--green-soft);
      color: #047857;
      font-size: 12.5px;
      font-weight: 700;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      padding: 6px 12px;
      border-radius: 999px;
      margin-bottom: 16px;
    }
    .ai-note h3 {
      font-family: var(--font-display);
      font-size: 25px;
      font-weight: 700;
      color: var(--ink);
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .ai-note p {
      font-size: 16.5px;
      color: var(--ink-soft);
      line-height: 1.75;
      margin-bottom: 14px;
    }
    .ai-note p:last-child { margin-bottom: 0; }
    .ai-note strong { color: var(--ink); }
    .ai-note-punch {
      margin-top: 22px;
      padding-top: 20px;
      border-top: 1px solid var(--line);
      font-family: var(--font-display);
      font-size: 18px;
      font-weight: 700;
      color: var(--ink) !important;
      line-height: 1.5;
    }

    /* Responsive */
    @media (max-width: 768px) {
      header { padding: 16px 20px; }
      .logo { font-size: 16px; gap: 8px; }
      .logo img { width: 26px; }
      header nav { gap: 8px !important; }
      .nav-link-blog { padding: 6px 8px; font-size: 13px; }
      .btn-login { padding: 8px 14px; font-size: 13px; }
      .hero { padding: 60px 24px 40px; }
      section { padding: 60px 24px; }
      .step { padding: 32px 24px; }
      .cta-section { padding: 48px 24px; margin: 32px 24px 60px; }
      .differentiator { padding: 40px 24px; }
      .ai-note { padding: 28px 22px; border-left-width: 4px; }
      .ai-note h3 { font-size: 21px; }
      .ai-note p { font-size: 15.5px; }
      .ai-note-punch { font-size: 16.5px; }
      .differentiator .vs { grid-template-columns: 1fr; gap: 16px; }
    }