styles.css

* {
    box-sizing: border-box;
  }
  
  body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
  }
  
  .container {
    max-width: 500px;
    margin: 0 auto;
    padding: 20px;
  }
  
  .title {
    text-align: center;
    margin-top: 0;
    margin-bottom: 20px;
  }
  
  .form {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
  }
  
  .form input[type="text"],
  .form input[type="number"] {
    flex: 1;
    padding: 10px;
    margin-right: 10px;
    border-radius: 4px;
    border: 1px solid #ddd;
    font-size: 16px;
    line-height: 1.5;
    transition: border-color 0.2s;
  }
  
  .form input[type="text"]:focus,
  .form input[type="number"]:focus {
    outline: none;
    border-color: #4CAF50;
  }
  
  .button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
  }
  
  .button:hover {
    background-color: #3e8e41;
  }
  
  .list {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    margin-bottom: 10px;
    background-color: white;
    border-radius: 4px;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .list li:last-child {
    margin-bottom: 0;
  }
  
  .list li span {
    flex: 1;
    font-size: 16px;
    line-height: 1.5;
  }
  
  .list li button {
    padding: 5px 10px;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-left: 10px;
  }
  
  .list li button:hover {
    background-color: #c0392b;
  }
  
  .error {
    color: #e74c3c;
    margin-top: 10px;
  }
  
  .remove-button {
    margin-left: 10px;
  }