body {
    font-family: Arial, sans-serif;
    margin: 20px;
  }
  
  .card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
  }
  
  .card {
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 10px;
    width: calc(33.33% - 20px);
    box-sizing: border-box;
  }
  
  .horse-input label {
    display: block;
    margin-bottom: 5px;
  }
  
  .horse-input input,
  .horse-input select {
    width: 100%;
    padding: 5px;
    margin-bottom: 10px;
  }
  
  #result {
    margin-top: 20px;
  }
  
  .loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    z-index: 1000;
  }
  
  .hidden {
    display: none;
  }

  .spinner {
    border: 16px solid #f3f3f3;
    border-top: 16px solid #3498db;
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
  }
  
  @keyframes spin {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
  }