body {
    font-family: Arial, sans-serif;
    background: #f0f9f6;
    padding: 20px;
    color: #333;
  }
  
  h1 {
    color: #2c786c;
  }
  
  form {
    margin-bottom: 20px;
    background: #ffffff;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.05);
  }
  
  input {
    margin: 5px;
    padding: 5px;
    border-radius: 5px;
    border: 1px solid #ccc;
  }
  
  button {
    padding: 6px 10px;
    background-color: #2c786c;
    color: white;
    border: none;
    border-radius: 5px;
  }
  
  #messageBox {
    margin: 10px 0;
    padding: 10px;
    background-color: #e0f7f1;
    border-left: 5px solid #2c786c;
    border-radius: 5px;
  }
  
  #taskList li {
    background: #fff;
    margin-bottom: 5px;
    padding: 8px;
    border-radius: 5px;
  }