<style>
/* ======= BASE STYLES ======= */
body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  background-color: #f5f7fa;
  color: #1f2937;
  overflow-x: hidden;
}

header {
  background-color: #1f2937;
  color: white;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #10b981;
}

/* ===== Amélioration des liens de navigation dans header ===== */
header nav a {
  color: white;
  margin-left: 1.5rem;
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  display: inline-block;
  user-select: none;
}

header nav a:hover,
header nav a:focus {
  background-color: #10b981; /* Vert lumineux */
  color: #f0faf0; /* Texte clair */
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.6);
  outline: none;
}

header nav a.active {
  background-color: #059669; /* Vert foncé */
  color: white;
  box-shadow: 0 4px 10px rgba(5, 150, 105, 0.8);
}

.hero {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(to right, #10b981, #059669);
  color: white;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.btn-primary {
  background-color: white;
  color: #059669;
  padding: 0.8rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: bold;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-color: #d1fae5;
}

.section {
  padding: 3rem 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.section h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 2rem;
  color: #111827;
}

.features, .faq-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

/* Boxes par défaut sans contour */
.feature-card,
.faq-item,
.verifier,
.stat-box,
#why .why-item {
  background: white;
  padding: 1.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent; /* contour transparent par défaut */
}

/* Contour noir et highlight au scroll */
body.scrolled .feature-card,
body.scrolled .faq-item,
body.scrolled .verifier,
body.scrolled .stat-box,
body.scrolled #why .why-item {
  border-color: black;
}

body.scrolled .feature-card:hover,
body.scrolled .faq-item:hover,
body.scrolled .verifier:hover,
body.scrolled .stat-box:hover,
body.scrolled #why .why-item:hover {
  border-color: #000;
  box-shadow: 0 0 15px 3px rgba(0, 0, 0, 0.6);
}

.feature-card h3, .faq-item h3 {
  color: #10b981;
  margin-bottom: 0.5rem;
}

.verifier {
  background-color: white;
  padding: 2rem;
  border-radius: 0.75rem;
  box-shadow: 0 0 15px rgba(0,0,0,0.05);
  margin-top: 2rem;
}

.verifier label {
  font-weight: 600;
}

.verifier input, .verifier button {
  width: 100%;
  padding: 1rem;
  margin-top: 1rem;
  border-radius: 0.5rem;
  border: 1px solid #ddd;
  font-size: 1rem;
  box-sizing: border-box;
}

.verifier button {
  background-color: #10b981;
  color: white;
  border: none;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.verifier button:hover {
  background-color: #059669;
}

.stats-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.stat-box {
  background: white;
  padding: 2rem;
  border-radius: 0.75rem;
  text-align: center;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
  flex: 1 1 200px;
}

.stat-box h3 {
  font-size: 1.8rem;
  color: #10b981;
}

.stat-box p {
  margin-top: 0.5rem;
  color: #4b5563;
}

/* Section Why Us */
#why {
  background: #e6f4ea;
  padding: 3rem 2rem;
  border-radius: 0.75rem;
  max-width: 1000px;
  margin: 3rem auto;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
}
#why h2 {
  color: #10b981;
  margin-bottom: 1.5rem;
  text-align: center;
}
#why .why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(250px,1fr));
  gap: 2rem;
}
#why .why-item {
  background: white;
  padding: 1.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
  text-align: center;
}
#why .why-item h3 {
  color: #059669;
  margin-bottom: 0.8rem;
}
#why .why-item p {
  color: #4b5563;
  font-size: 1rem;
}

footer {
  background-color: #1f2937;
  color: white;
  padding: 2rem;
  text-align: center;
  margin-top: 3rem;
}

canvas {
  max-width: 100%;
  margin: 2rem 0;
}


@keyframes waveFade {
  0% {
    opacity: 0.6;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translate(calc(-50% + 5px), calc(-50% - 5px)) scale(1.3);
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + 10px), calc(-50% - 10px)) scale(0.5);
  }
}

/* ======= RESPONSIVE ======= */
@media (max-width: 600px) {
  header {
    padding: 1rem;
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    margin-top: 0.5rem;
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
  }

  nav a {
    margin-left: 0;
    font-size: 0.9rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: 2rem 1rem;
    max-width: 100%;
  }

  .verifier input, .verifier button {
    font-size: 1rem;
    padding: 0.8rem;
  }

  .stats-grid {
    flex-direction: column;
    gap: 1.5rem;
  }

  .stat-box {
    flex: 1 1 100%;
  }

  .features, .faq-items {
    grid-template-columns: 1fr !important;
  }

  .feature-card[style*="grid-column: span 2"] {
    grid-column: auto !important;
  }
}

</style>

<!-- Styles -->
<style>
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    color: #2c6b2c;
    background-color: #f0faf0;
  }

  .site-header {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
    position: sticky;
    top: 0;
  }

  .site-header .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    height: 40px;
    width: auto;
  }

  .nav {
    display: flex;
    align-items: center;
    position: relative;
  }

  .nav-links {
    display: flex;
    list-style: none;
    gap: 25px;
  }

  .nav-links a {
    text-decoration: none;
    color: #2c6b2c;
    font-weight: 600;
    transition: color 0.3s;
  }

  .nav-links a:hover {
    color: #27ae60;
  }

  .menu-toggle {
    display: none;
    font-size: 1.8rem;
    background: none;
    border: none;
    margin-left: 15px;
    color: #2c6b2c;
  }

  @media (max-width: 768px) {
    .menu-toggle {
      display: block;
    }

    .nav-links {
      display: none;
      flex-direction: column;
      background: #f9fff9;
      position: absolute;
      top: 100%;
      right: 0;
      padding: 12px 20px;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      z-index: 1001;
      min-width: 150px;
    }

    .nav-links.show {
      display: flex;
    }
  }
</style>

  <style>
    .box {
      max-width: 1200px;
      margin: 40px auto;
      padding: 30px 40px;
      background: #fff;
      border-radius: 8px;
      box-shadow: 0 2px 10px rgb(0 0 0 / 0.1);
    }
    .section h2 {
      margin-bottom: 25px;
      font-weight: 700;
      font-size: 1.8rem;
      text-align: center;
    }
    .marquee {
      width: 100%;
      overflow: hidden;
      box-sizing: border-box;
    }
    .marquee-content {
      display: flex;
      width: max-content;
      animation: marquee 20s linear infinite;
      gap: 40px;
      align-items: center;
      padding-left: 0; /* plus de décalage initial */
    }
    .marquee-content img {
      height: 60px;
      user-select: none;
      pointer-events: none;
      filter: grayscale(0.3);
      transition: filter 0.3s ease;
    }
    .marquee-content img:hover {
      filter: grayscale(0);
    }
    @keyframes marquee {
      0% {
        transform: translateX(0);
      }
      100% {
        transform: translateX(-50%);
      }
    }
  </style>

  <style>
.advantages-section {
  background: #f8fbf9;
  padding: 50px 20px;
  text-align: center;
}

.advantages-section h2 {
  font-size: 2rem;
  color: #19692c;
  font-weight: 800;
  margin-bottom: 35px;
}

.advantages-grid {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 960px;
  margin: 0 auto;
}

.advantage-card {
  background: #ffffff;
  border: 2px solid #000;
  border-radius: 14px;
  padding: 24px 20px;
  width: 240px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: left;
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
  font-size: 1.8rem;
  color: #28a745;
  margin-bottom: 10px;
}

.advantage-card h3 {
  font-size: 1.1rem;
  color: #19692c;
  margin-bottom: 8px;
  font-weight: 700;
}

.advantage-card p {
  font-size: 0.88rem;
  color: #333;
  line-height: 1.4;
}

@media (max-width: 768px) {
  .advantage-card {
    width: 100%;
    max-width: 320px;
  }
}
</style>
 <!-- Style -->
  <style>
    .tabs {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-bottom: 30px;
      flex-wrap: wrap;
    }

    .tab-button {
      background-color: #d1ead9;
      border: none;
      padding: 12px 25px;
      font-size: 1rem;
      font-weight: bold;
      color: #1f4620;
      border-radius: 25px;
      transition: all 0.3s ease;
    }

    .tab-button.active,
    .tab-button:hover {
      background-color: #27ae60;
      color: white;
      box-shadow: 0 4px 10px rgba(39, 174, 96, 0.3);
    }

    .tab-content {
      display: none;
      animation: fadeIn 0.4s ease-in-out;
    }

    .tab-content.active {
      display: block;
    }

    .glass-box {
      background: rgba(255, 255, 255, 0.6);
      border-radius: 16px;
      padding: 30px;
      backdrop-filter: blur(6px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    }

    .glass-box ul {
      list-style: none;
      padding: 0;
    }

    .glass-box li {
      font-size: 1.05rem;
      margin-bottom: 14px;
      color: #1f4620;
    }

    .glass-box li strong {
      color: #1a3c1a;
    }

    .alert {
      background-color: #fff3cd;
      color: #856404;
      padding: 12px 18px;
      border-radius: 10px;
      margin-top: 20px;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @media (max-width: 700px) {
      .tabs {
        flex-direction: column;
      }

      .tab-button {
        width: 100%;
      }
    }
  </style>
    <style>
    @keyframes scroll-left {
      0% {
        transform: translateX(0);
      }
      100% {
        transform: translateX(-50%);
      }
    }
  </style>
  <style>
  .features-section {
    background-color: #f0faf0;
    padding: 80px 20px;
    text-align: center;
  }

  .section-title {
    font-size: 2.2rem;
    color: #2c6b2c;
    margin-bottom: 50px;
  }

  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
  }

  .feature-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    text-align: left;
    transition: transform 0.3s, box-shadow 0.3s;
  }

  .feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
  }

  .icon-box {
    font-size: 2rem;
    background-color: #27ae60;
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
  }

  .feature-card h3 {
    font-size: 1.3rem;
    color: #2c6b2c;
    margin-bottom: 10px;
  }

  .feature-card p {
    color: #3c763d;
    font-size: 0.95rem;
    line-height: 1.5;
  }
</style>

  <style>
  :root {
    --primary-color: #28a745;  /* vert principal */
    --border-color: #000000; /* contour noir */
    --background-color: #f0f4f8; /* fond clair */
    --card-bg: #ffffff; /* fond blanc */
    --text-color: var(--primary-color); /* texte vert */
    --highlight-color: #19692c; /* vert foncé */
  }

  body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    margin: 20px;
  }

  .info-section {
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 20px;
    max-width: 840px;
    margin: 0 auto 25px auto;
    color: var(--primary-color);
    font-size: 1.15rem;
    font-weight: 700;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    user-select: none;
  }

  .pricing-container {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 880px;
    margin: 0 auto 40px auto;
  }

  .pricing-box {
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    width: 260px;
    padding: 20px 18px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    box-sizing: border-box;
  }

  .pricing-box:hover {
    transform: translateY(-6px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.1);
  }

  .pricing-header {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 12px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1.2px;
  }

  .feature {
    display: flex;
    justify-content: space-between;
    margin: 8px 0;
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
  }

  .feature-label {
    color: #19692c;
    font-weight: 500;
  }

  .feature-value {
    color: var(--highlight-color);
    font-weight: 700;
  }

  .checkmark {
    color: var(--text-color);
    font-weight: 700;
    font-size: 1.1rem;
  }

  .contact-btn {
    margin-top: 18px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 10px 0;
    font-weight: 700;
    font-size: 0.95rem;
    transition: background-color 0.3s ease;
    text-align: center;
    text-transform: uppercase;
  }

  .contact-btn:hover {
    background-color: #19692c;
  }

  .footer-section {
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 18px 20px;
    max-width: 880px;
    margin: 0 auto 30px auto;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  }

  .crypto-logos {
    margin-top: 14px;
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
  }

  .crypto-logos svg {
    width: 40px;
    height: 40px;
    fill: var(--primary-color);
    transition: fill 0.3s ease;
  }

  .crypto-logos svg:hover {
    fill: var(--highlight-color);
  }

  @media (max-width: 720px) {
    .pricing-box {
      width: 100%;
      max-width: 350px;
      margin: 0 auto 18px;
    }

    .info-section,
    .footer-section {
      max-width: 95%;
      font-size: 1rem;
    }

    .crypto-logos svg {
      width: 32px;
      height: 32px;
    }
  }
</style>