body {
      font-family: Arial, sans-serif;
      background: #f3f3f3;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 40px;
    }
    h1 {
      color: #444;
    }
    .container {
      background: white;
      padding: 20px 30px;
      border-radius: 10px;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
      width: 100%;
      max-width: 500px;
    }
    label {
      display: block;
      margin-top: 15px;
      font-weight: bold;
    }
    input[type="date"], select {
      padding: 8px;
      margin-top: 5px;
      width: 100%;
      box-sizing: border-box;
      border-radius: 5px;
      border: 1px solid #ccc;
    }
    button {
      margin-top: 15px;
      padding: 10px 15px;
      background-color: #007bff;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }
    button:hover {
      background-color: #0056b3;
    }
    .result {
      margin-top: 20px;
      font-size: 18px;
      color: #333;
    }