:root {
      --primary-color: #14123b;
      --secondary-color: #06b6d4;
    }
    
    .navbar {
      background: linear-gradient(135deg, #1e293b 0%, #334155 100%) !important;
    }
    
    .page-header {
      background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
      color: white;
      padding: 3rem 0;
    }
    
    .content-section {
      padding: 4rem 0;
    }
    
    .concept-card {
      background: white;
      border-radius: 12px;
      padding: 2rem;
      margin-bottom: 2rem;
      box-shadow: 0 4px 6px rgba(0,0,0,0.07);
      border-left: 4px solid var(--primary-color);
      transition: transform 0.3s ease;
    }
    
    .concept-card:hover {
      transform: translateX(10px);
    }
    
    .task-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 1.5rem;
      margin: 2rem 0;
    }
    
    .task-box {
      background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
      padding: 1.5rem;
      border-radius: 12px;
      transition: all 0.3s ease;
      border: 2px solid transparent;
    }
    
    .task-box:hover {
      border-color: var(--primary-color);
      box-shadow: 0 8px 16px rgba(79, 70, 229, 0.2);
    }
    
    .task-icon {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }
    
    .timeline {
      position: relative;
      padding-left: 3rem;
    }
    
    .timeline::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 3px;
      background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    }
    
    .timeline-item {
      position: relative;
      margin-bottom: 2rem;
    }
    
    .timeline-marker {
      position: absolute;
      left: -3.5rem;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--primary-color);
      border: 3px solid white;
      box-shadow: 0 0 0 3px var(--primary-color);
    }
    
    .tool-badge {
      display: inline-block;
      padding: 8px 16px;
      margin: 5px;
      background: #e0e7ff;
      color: #4338ca;
      border-radius: 20px;
      font-weight: 600;
      font-size: 0.9rem;
    }
    
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 2rem;
      position: relative;
      padding-bottom: 1rem;
    }
    
    .section-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 60px;
      height: 4px;
      background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    }
    
    .example-box {
      background: #f8fafc;
      border-left: 4px solid var(--secondary-color);
      padding: 1rem 1.5rem;
      margin: 1rem 0;
      border-radius: 4px;
    }