#particles-js {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
  }

  .top-section {
      position: relative;
      height: 400px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  }

  .top-section-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      min-height: 400px;
  }