styles.css

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
  }
  
  .container {
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  }
  
  h1, h2 {
    text-align: center;
  }
  
  form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
  }
  
  form input, form select, form button {
    padding: 10px;
    font-size: 16px;
  }
  
  form button {
    background-color: #007bff;
    color: #fff;
    border: none;
    cursor: pointer;
  }
  
  form button:hover {
    background-color: #0056b3;
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
  }
  
  table th, table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
  }
  
  table th {
    background-color: #f8f8f8;
  }
  
  #total-expense {
    font-weight: bold;
    text-align: right;
  }