* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
      background: linear-gradient(135deg, #1e3c72 0%, #2a5298 25%, #7e8ba3 75%, #b8c6db 100%);
      min-height: 100vh;
      color: #e8eef5;
      position: relative;
    }

    body::before {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(30, 64, 175, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(147, 197, 253, 0.08) 0%, transparent 50%);
      pointer-events: none;
      z-index: 1;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      position: relative;
      z-index: 2;
    }

    /* Header */
    header {
      background: linear-gradient(135deg, rgba(30, 60, 114, 0.9), rgba(42, 82, 152, 0.85));
      backdrop-filter: blur(10px);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
      padding: 20px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    header .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    .back-button {
      display: inline-flex;
      align-items: center;
      padding: 10px 20px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: white;
      text-decoration: none;
      border-radius: 25px;
      font-weight: 500;
      transition: all 0.3s ease;
      box-shadow: 0 2px 10px rgba(59, 130, 246, 0.3);
    }

    .back-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 20px rgba(59, 130, 246, 0.5);
      background: linear-gradient(135deg, #2563eb, #1d4ed8);
    }

    .back-button::before {
      content: '←';
      margin-right: 8px;
      font-size: 18px;
    }

    h1 {
      font-size: clamp(1.5rem, 4vw, 2.5rem);
      font-weight: 700;
      background: linear-gradient(135deg, #ffffff, #cbd5e1);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    /* Annonce Banner */
    .annonce-banner {
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.15));
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 15px;
      padding: 20px;
      margin: 30px auto;
      text-align: center;
      max-width: 800px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }

    .quiz-label {
      display: inline-block;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: white;
      padding: 8px 20px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 10px;
      text-transform: uppercase;
      letter-spacing: 1px;
      box-shadow: 0 2px 10px rgba(59, 130, 246, 0.4);
    }

    .annonce-banner p {
      font-size: 1.1rem;
      color: #e0e7ff;
      margin-top: 10px;
      font-style: italic;
    }

    /* AdSense Placeholders */
    .adsense-container {
      background: rgba(255, 255, 255, 0.05);
      border: 1px dashed rgba(255, 255, 255, 0.2);
      border-radius: 10px;
      padding: 20px;
      margin: 20px auto;
      text-align: center;
      min-height: 100px;
      display: flex;
      align-items: center;
      justify-content: center;
      backdrop-filter: blur(5px);
    }

    .adsense-label {
      color: rgba(255, 255, 255, 0.4);
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    /* Section titre */
    .section-title {
      text-align: center;
      margin: 40px 0 30px;
    }

    .section-title h2 {
      font-size: clamp(1.8rem, 3vw, 2.5rem);
      font-weight: 600;
      background: linear-gradient(135deg, #ffffff, #93c5fd);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 10px;
    }

    .section-title .underline {
      width: 80px;
      height: 4px;
      background: linear-gradient(90deg, #3b82f6, #2563eb);
      margin: 0 auto;
      border-radius: 2px;
    }

    /* Grille de cours */
    .courses {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 20px;
      margin: 40px 0;
    }

    .course {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 15px;
      padding: 25px 20px;
      text-decoration: none;
      color: #f0f4f8;
      font-size: 1.1rem;
      font-weight: 500;
      text-align: center;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }

    .course::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.1));
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .course:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
      border-color: rgba(59, 130, 246, 0.5);
    }

    .course:hover::before {
      opacity: 1;
    }

    .course-icon {
      display: block;
      width: 50px;
      height: 50px;
      margin: 0 auto 15px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      border-radius: 50%;
      position: relative;
    }

    .course-icon::after {
      content: '📚';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      font-size: 24px;
    }

    /* À propos content */
    .about-section {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 15px;
      padding: 40px;
      margin: 30px auto;
      max-width: 900px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
      animation: fadeIn 0.6s ease-out forwards;
    }

    .about-section p {
      margin-bottom: 20px;
      line-height: 1.7;
      color: #e0e7ff;
      font-size: 1.05rem;
    }

    .about-section p:last-child {
      margin-bottom: 0;
    }

    .about-features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 25px;
      margin: 40px 0;
    }

    .feature-card {
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.1));
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 12px;
      padding: 25px;
      text-align: center;
      transition: all 0.3s ease;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      animation: fadeIn 0.6s ease-out forwards;
      opacity: 0;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
      border-color: rgba(59, 130, 246, 0.5);
    }

    .feature-icon {
      display: block;
      width: 60px;
      height: 60px;
      margin: 0 auto 15px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      border-radius: 50%;
      position: relative;
    }

    .feature-title {
      font-size: 1.2rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: #ffffff;
    }

    .feature-text {
      color: #e0e7ff;
      font-size: 0.95rem;
      line-height: 1.6;
    }

    .icon-learn::after {
      content: '🎓';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      font-size: 28px;
    }

    .icon-practice::after {
      content: '📝';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      font-size: 28px;
    }

    .icon-community::after {
      content: '👥';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      font-size: 28px;
    }

    /* Team section */
    .team-section {
      text-align: center;
      margin-top: 60px;
    }

    .team-members {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
      margin-top: 30px;
    }

    .member {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 15px;
      padding: 25px;
      width: 250px;
      text-align: center;
      transition: all 0.3s ease;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      animation: fadeIn 0.6s ease-out forwards;
      opacity: 0;
    }

    .member:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
      border-color: rgba(59, 130, 246, 0.5);
    }

    .member-avatar {
      width: 100px;
      height: 100px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      margin: 0 auto 15px;
      position: relative;
      overflow: hidden;
      border: 3px solid rgba(255, 255, 255, 0.3);
    }

    .member-avatar::after {
      content: '👤';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      font-size: 50px;
    }

    .member-name {
      font-size: 1.1rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 5px;
    }

    .member-role {
      color: #93c5fd;
      font-size: 0.9rem;
      margin-bottom: 15px;
    }

    .member-bio {
      color: #e0e7ff;
      font-size: 0.9rem;
      line-height: 1.6;
    }
    
    
    /* How to Play */
    .help-section {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 15px;
      padding: 40px;
      margin: 30px auto;
      max-width: 900px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
      animation: fadeIn 0.6s ease-out forwards;
    }

    .help-intro {
      margin-bottom: 30px;
      line-height: 1.7;
      color: #e0e7ff;
      font-size: 1.05rem;
      text-align: center;
    }

    .steps-container {
      display: flex;
      flex-direction: column;
      gap: 30px;
      margin: 30px 0;
    }

    .step {
      display: flex;
      gap: 25px;
      align-items: flex-start;
      padding-bottom: 30px;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
      animation: fadeIn 0.6s ease-out forwards;
      opacity: 0;
    }

    .step:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }

    .step-number {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 50px;
      height: 50px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      border-radius: 50%;
      flex-shrink: 0;
      font-size: 24px;
      font-weight: 700;
      box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
      color: white;
    }

    .step-content {
      flex: 1;
    }

    .step-title {
      font-size: 1.3rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .step-description {
      line-height: 1.7;
      color: #e0e7ff;
      font-size: 1.05rem;
      margin-bottom: 15px;
    }

    .tip-box {
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.1));
      border: 1px solid rgba(59, 130, 246, 0.3);
      border-radius: 10px;
      padding: 15px;
      margin-top: 15px;
      position: relative;
    }

    .tip-box::before {
      content: '💡';
      position: absolute;
      top: -12px;
      left: 15px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      border-radius: 50%;
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }

    .tip-title {
      font-weight: 600;
      color: #93c5fd;
      margin-bottom: 5px;
      margin-left: 5px;
    }

    .tip-text {
      color: #e0e7ff;
      font-size: 0.95rem;
      line-height: 1.6;
      margin-left: 5px;
    }

    .quiz-example {
      background: linear-gradient(135deg, rgba(30, 60, 114, 0.5), rgba(42, 82, 152, 0.45));
      border-radius: 12px;
      padding: 20px;
      margin: 20px 0;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .example-question {
      font-weight: 600;
      font-size: 1.1rem;
      margin-bottom: 15px;
      color: white;
    }

    .example-options {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 15px;
      margin-bottom: 15px;
    }

    @media (max-width: 600px) {
      .example-options {
        grid-template-columns: 1fr;
      }
    }

    .example-option {
      padding: 12px 15px;
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 10px;
      transition: all 0.3s ease;
      cursor: pointer;
    }

    .option-correct {
      background: rgba(74, 222, 128, 0.2);
      border-color: rgba(74, 222, 128, 0.5);
    }

    .option-wrong {
      background: rgba(248, 113, 113, 0.2);
      border-color: rgba(248, 113, 113, 0.5);
    }

    .faq-section {
      margin-top: 50px;
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .faq-item {
      background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 10px;
      overflow: hidden;
      animation: fadeIn 0.6s ease-out forwards;
      opacity: 0;
    }

    .faq-question {
      padding: 15px 20px;
      font-size: 1.05rem;
      font-weight: 600;
      color: white;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.1));
      cursor: pointer;
      position: relative;
      padding-right: 40px;
    }

    .faq-question::after {
      content: '+';
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 20px;
    }

    .faq-answer {
      padding: 15px 20px;
      line-height: 1.6;
      color: #e0e7ff;
      font-size: 0.95rem;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    /* Footer */
    footer {
      background: linear-gradient(135deg, rgba(30, 60, 114, 0.9), rgba(42, 82, 152, 0.85));
      backdrop-filter: blur(10px);
      padding: 30px 0;
      margin-top: 60px;
      text-align: center;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
        .contact-links {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin: 20px 0;
      flex-wrap: wrap;
    }

    .contact-link {
      display: inline-flex;
      align-items: center;
      padding: 10px 20px;
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(37, 99, 235, 0.2));
      color: white;
      text-decoration: none;
      border-radius: 25px;
      font-weight: 500;
      transition: all 0.3s ease;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .contact-link:hover {
      transform: translateY(-2px);
      background: linear-gradient(135deg, rgba(59, 130, 246, 0.4), rgba(37, 99, 235, 0.3));
      border-color: rgba(255, 255, 255, 0.3);
    }

    /* Responsive */
    @media (max-width: 768px) {
      header .container {
        flex-direction: column;
        text-align: center;
      }

      .courses {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
      }

      .course {
        padding: 20px 15px;
        font-size: 1rem;
      }

      .adsense-container {
        min-height: 80px;
        margin: 15px auto;
      }
      
      .help-section {
        padding: 25px;
      }

      .step {
        flex-direction: column;
        gap: 15px;
      }

      .step-number {
        width: 40px;
        height: 40px;
        font-size: 20px;
      }
      
      .about-section {
        padding: 25px;
      }

      .feature-card {
        padding: 20px;
      }

      .member {
        width: 100%;
        max-width: 300px;
      }

    }

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

    .course {
      animation: fadeIn 0.6s ease-out forwards;
      opacity: 0;
    }

    .course:nth-child(1) { animation-delay: 0.1s; }
    .course:nth-child(2) { animation-delay: 0.2s; }
    .course:nth-child(3) { animation-delay: 0.3s; }
    .course:nth-child(4) { animation-delay: 0.4s; }
    .course:nth-child(5) { animation-delay: 0.5s; }
    .course:nth-child(6) { animation-delay: 0.6s; }
    .course:nth-child(7) { animation-delay: 0.7s; }
    .course:nth-child(8) { animation-delay: 0.8s; }
    .course:nth-child(9) { animation-delay: 0.9s; }
    .course:nth-child(10) { animation-delay: 1s; }
    
    
    .step:nth-child(1) { animation-delay: 0.1s; }
    .step:nth-child(2) { animation-delay: 0.2s; }
    .step:nth-child(3) { animation-delay: 0.3s; }
    .step:nth-child(4) { animation-delay: 0.4s; }
    .step:nth-child(5) { animation-delay: 0.5s; }

    .faq-item:nth-child(1) { animation-delay: 0.6s; }
    .faq-item:nth-child(2) { animation-delay: 0.7s; }
    .faq-item:nth-child(3) { animation-delay: 0.8s; }
    .faq-item:nth-child(4) { animation-delay: 0.9s; }
    .faq-item:nth-child(5) { animation-delay: 1s; }
    
        .feature-card:nth-child(1) { animation-delay: 0.1s; }
    .feature-card:nth-child(2) { animation-delay: 0.2s; }
    .feature-card:nth-child(3) { animation-delay: 0.3s; }

    .member:nth-child(1) { animation-delay: 0.4s; }
    .member:nth-child(2) { animation-delay: 0.5s; }
    .member:nth-child(3) { animation-delay: 0.6s; }