html, body {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #0C2D48;
    font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  }
  
  .filter-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: #B1D4E0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1); /* shadow */
  }
  
  .filter-item + .filter-item {
    margin-top: 20px; /* space between filter items */
  }
  
  label {
    margin-bottom: 5px;
    font-weight: bold;
  }
  
  select {
    padding: 8px;
    border: 1px solid #2E8BC0;
    border-radius: 4px;
    width: 100%; /* fill the container width */
  }

  .submit-button {
    padding: 8px 16px;
    margin-top: 20px; /* Adds space above the button */
    background-color: #2E8BC0; /* Example background color */
    color: white; /* Text color */
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  }
  
  .submit-button:hover {
    background-color: #1D6A96; /* Darker shade for hover effect */
  }