.container {
      background: white;
      padding: 20px;
      border-radius: 10px;
      max-width: 500px;
      margin: auto;
      box-shadow: 0 0 10px rgba(0,0,0,0.1);
    }

    label {
      margin-top: 10px;
    }

    .time-row {
      display: flex;
      gap: 10px;
    }

    .time-row input {
      width: 100%;
    }

    button {
      background-color: #007bff;
      color: white;
      border: none;
      margin-top: 20px;
      cursor: pointer;
      font-weight: bold;
    }

    button:hover {
      background-color: #0056b3;
    }

    #result {
      margin-top: 20px;
      background: #e7ffe7;
      padding: 10px;
      border-left: 5px solid green;
      border-radius: 5px;
    }