/* Reset and Base Styles */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      line-height: 1.6;
      color: #1a1f36;
      background: #ffffff;
    }

    /* Loading State */
    #page-loading {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(255,255,255,0.95);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 9999;
    }

    .spinner {
      width: 50px;
      height: 50px;
      border: 4px solid #f3f4f6;
      border-top-color: #14b8a6;
      border-radius: 50%;
      animation: spin 1s linear infinite;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    /* Error Container */
    #error-container {
      display: none;
    }

    /* Hero Section */
    .hero {
      background: linear-gradient(135deg, #0a0a0a 0%, #1a1f36 100%);
      color: white;
      padding: 100px 20px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="2" height="2" fill="%2314b8a6" opacity="0.1"/></svg>');
      background-size: 50px 50px;
    }

    .hero-content {
      max-width: 800px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.2;
    }

    .hero .subtitle {
      font-size: 1.5rem;
      margin-bottom: 30px;
      color: #d1d5db;
    }

    .hero .stats {
      display: flex;
      gap: 40px;
      justify-content: center;
      margin: 40px 0;
      flex-wrap: wrap;
    }

    .stat-item {
      text-align: center;
    }

    .stat-item .number {
      font-size: 2.5rem;
      font-weight: 800;
      color: #14b8a6;
      display: block;
    }

    .stat-item .label {
      font-size: 0.9rem;
      color: #9ca3af;
    }

    /* CTA Button */
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 18px 40px;
      font-size: 1.1rem;
      font-weight: 700;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      transition: all 0.3s ease;
      text-decoration: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, #14b8a6 0%, #0f766e 100%);
      color: white;
      box-shadow: 0 4px 20px rgba(20, 184, 166, 0.4);
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 30px rgba(20, 184, 166, 0.5);
    }

    /* Section Styles */
    section {
      padding: 80px 20px;
      max-width: 1200px;
      margin: 0 auto;
    }

    section h2 {
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 40px;
      text-align: center;
      color: #1a1f36;
    }

    /* Course Details */
    .course-meta {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 20px;
      margin: 40px 0;
    }

    .meta-card {
      padding: 25px;
      background: linear-gradient(135deg, #f9fafb 0%, #e5e7eb 100%);
      border-radius: 12px;
      border-left: 4px solid #14b8a6;
    }

    .meta-card h3 {
      font-size: 0.9rem;
      color: #6b7280;
      margin-bottom: 8px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .meta-card p {
      font-size: 1.5rem;
      font-weight: 700;
      color: #1a1f36;
    }

    /* Curriculum */
    .curriculum {
      background: #f9fafb;
    }

    #curriculum-list {
      max-width: 900px;
      margin: 0 auto;
    }

    /* Responsive */
    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2rem;
      }

      .hero .subtitle {
        font-size: 1.1rem;
      }

      section h2 {
        font-size: 1.8rem;
      }

      .hero .stats {
        gap: 20px;
      }

      .stat-item .number {
        font-size: 1.8rem;
      }
    }