body {
      font-family: Arial, sans-serif;
      margin: 0;
      background: #f5f5f5;
    }
    header {
      background: #1da372;
      color: #fff;
      padding: 15px 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    header nav a {
      margin-left: 20px;
      text-decoration: none;
      color: #fff;
      font-weight: bold;
    }
    .container {
      padding: 40px;
    }
    h1 {
      color: #1da372;
    }
    .tutorial-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }
    .card {
      background: #fff;
      border-radius: 10px;
      padding: 20px;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
      transition: transform 0.2s ease;
    }
    .card:hover {
      transform: translateY(-5px);
    }
    .card h2 {
      margin-top: 0;
      color: #1da372;
    }
    .card a {
      display: inline-block;
      margin-top: 10px;
      text-decoration: none;
      color: #fff;
      background: #1da372;
      padding: 8px 15px;
      border-radius: 5px;
    }
    .card a:hover {
      background: #158a5d;
    }