#agreementModal {
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0,0,0,0.6);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 9999;
    }
    #agreementContent {
      background: #fff;
      padding: 20px;
      border-radius: 10px;
      max-width: 400px;
      text-align: center;
      box-shadow: 0 0 10px rgba(0,0,0,0.3);
    }
    button {
      margin: 10px;
      padding: 10px 20px;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }
    .agree { background: #4CAF50; color: white; }
    .disagree { background: #f44336; color: white; }