body {
      margin: 0;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: #f4f4f4;
      color: #333;
      line-height: 1.6;
    }
    .header {
      background: #2c3e50;
      color: white;
      padding: 40px 20px;
      text-align: center;
    }
    main {
      padding: 20px;
    }
    .section {
      margin: 30px 0;
      padding: 20px;
      background: white;
      border-radius: 10px;
      box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }
    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-top: 20px;
    }
    .card {
      background: #ecf0f1;
      padding: 20px;
      border-radius: 8px;
      text-align: center;
      font-weight: bold;
      color: #2c3e50;
      text-decoration: none;
      transition: background 0.3s, transform 0.3s;
    }
    .card:hover {
      background: #3498db;
      color: white;
      transform: translateY(-5px);
    }
    .video-wrapper {
      position: relative;
      padding-bottom: 56.25%;
      height: 0;
      overflow: hidden;
    }
    .video-wrapper iframe {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }
    form {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    input, textarea {
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 5px;
      width: 100%;
    }
    button {
      padding: 10px;
      background: #2c3e50;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }
    button:hover {
      background: #34495e;
    }

    .back-link {
      display: inline-block;
      margin: 20px 0;
      padding: 10px 20px;
      background-color: #2c3e50;
      color: white;
      text-decoration: none;
      border-radius: 6px;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .back-link:hover {
      background-color: #34495e;
      transform: translateX(-5px);
    }


    footer {
      background: #2c3e50;
      color: white;
      text-align: center;
      padding: 20px;
    }
    .fade-in {
      animation: fadeIn 1s ease-out;
    }
    .delay {
      animation-delay: 0.5s;
    }
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }