body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 0;
      background: #f0f4f8;
      color: #333;
    }

    header {
      background-color: #2980b9;
      color: white;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0 20px;
      box-sizing: border-box;
      z-index: 100;
      position: fixed;
    }

    .header-left {
      position: absolute;
      left: 20px;
      display: flex;
      gap: 10px;
    }

    header h1 {
      margin: 0;
      font-size: 24px;
      text-align: center;
      flex-grow: 1;
    }

    header button {
      background-color: transparent;
      border: none;
      color: white;
      font-size: 18px;
      cursor: pointer;
      padding: 6px 12px;
      border-radius: 6px;
      transition: background-color 0.3s ease;
    }

    header button:hover {
      background-color: rgba(255, 255, 255, 0.2);
    }

    h1 {
      margin: 0;
    }

    main {
      max-width: 900px;
      margin: 50px auto;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 80px;
      padding: 0 20px;
      margin-top: 50px;
    }

    .card {
      background: white;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
      padding: 15px;
      text-align: center;
      cursor: pointer;
      transition: box-shadow 0.3s ease;
      margin-top: 60px;
    }

    .card:hover {
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

    .card h2 {
      margin-top: 10px;
      color: #2980b9;
    }

    .card p {
      color: #666;
      font-size: 0.9rem;
    }

    footer {
      
      text-align: center;
      padding: 15px;
      background: #89c0e4;
      margin-top: 120px;
      font-size: 0.8rem;
      color: #666;
    }

    a {
      text-decoration: none;
      color: inherit;
      display: block;
      height: 100%;
    }