.btn {
      background-color: #ff5722;
      color: white;
      padding: 12px 24px;
      font-size: 16px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: background 0.3s;
    }

    .btn:hover {
      background-color: #e64a19;
    }

    .popup-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0,0,0,0.6);
      z-index: 1000;
    }

    .popup-content {
      background: white;
      max-width: 600px;
      margin: 100px auto;
      padding: 30px;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.3);
      position: relative;
      overflow-y: auto;
      max-height: 80vh;
    }

    .close-btn {
      position: absolute;
      top: 15px;
      right: 20px;
      font-size: 24px;
      font-weight: bold;
      color: #888;
      cursor: pointer;
      transition: color 0.3s;
    }

    .close-btn:hover {
      color: #000;
    }

    h2 {
      color: #ff5722;
      margin-top: 0;
    }

    ul, ol {
      padding-left: 20px;
    }

    .popup-content p,
    .popup-content li {
      font-size: 16px;
      line-height: 1.6;
    }

    @media screen and (max-width: 640px) {
      .popup-content {
        margin: 50px 20px;
        padding: 20px;
      }
    }