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

  body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
      color: #fff;
      line-height: 1.7;
  }

  .container {
      max-width: 900px;
      margin: 0 auto;
      padding: 2rem 1rem;
  }

  .header {
      text-align: center;
      margin-bottom: 3rem;
      padding: 2rem;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(10px);
      border-radius: 1rem;
      border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .header h1 {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      background: linear-gradient(135deg, #fff 0%, #e0e7ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
  }

  .header p {
      font-size: 1.1rem;
      color: rgba(255, 255, 255, 0.85);
      margin: 0;
  }

  .article-card {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(20px);
      border-radius: 1.5rem;
      padding: 3rem;
      box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
      border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .back-button {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      padding: 0.75rem 1.5rem;
      border-radius: 0.5rem;
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: all 0.3s ease;
      box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
      margin-bottom: 1.5rem;
  }

  .back-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
  }

  .back-button::before {
      content: '←';
      font-size: 1.1rem;
  }

  .article-content h2 {
      font-size: 1.8rem;
      font-weight: 600;
      margin: 2rem 0 1.5rem;
      color: #1e293b;
      padding-bottom: 0.5rem;
      border-bottom: 3px solid #667eea;
  }

  .article-content h3 {
      font-size: 1.4rem;
      font-weight: 600;
      margin: 1.5rem 0 1rem;
      color: #334155;
  }

  .article-content p {
      margin-bottom: 1.2rem;
      color: #475569;
      font-size: 1.05rem;
      line-height: 1.8;
  }

  .article-content strong {
      color: #667eea;
      font-weight: 600;
  }

  .feature-list {
      list-style: none;
      padding: 0;
      margin: 2rem 0;
  }

  .feature-list li {
      background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
      padding: 1.2rem 1.5rem;
      margin-bottom: 1rem;
      border-radius: 0.75rem;
      border-left: 4px solid #667eea;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      color: #1e293b;
  }

  .feature-list li:hover {
      transform: translateX(10px);
      box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
  }

  .feature-list strong {
      color: #667eea;
      font-size: 1.1rem;
  }

  .highlight-box {
      background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
      border: 2px solid #f59e0b;
      border-radius: 1rem;
      padding: 1.5rem 2rem;
      margin: 2rem 0;
      color: #1e293b;
  }

  .highlight-box h3 {
      color: #92400e;
      margin-bottom: 0.75rem;
      font-size: 1.3rem;
  }

  .highlight-box p {
      color: #1e293b;
      margin: 0;
  }

  .cta-button {
      display: inline-block;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      padding: 1rem 2.5rem;
      border-radius: 0.75rem;
      text-decoration: none;
      font-weight: 600;
      font-size: 1.1rem;
      transition: all 0.3s ease;
      box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
      margin-top: 2rem;
  }

  .cta-button:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
  }

  @media (max-width: 768px) {
      .container {
          padding: 1rem;
      }

      .header h1 {
          font-size: 1.8rem;
      }

      .article-card {
          padding: 2rem;
      }

      .back-button {
          display: flex;
          width: 100%;
          justify-content: center;
      }

      .article-content h2 {
          font-size: 1.5rem;
      }

      .article-content h3 {
          font-size: 1.2rem;
      }
  }