body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #f7f8fc, #e4ecf5);
    margin: 0;
    padding: 20px;
    text-align: center;
  }
  
  form {
    background-color: white;
    padding: 20px;
    margin: 20px auto;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    max-width: 400px;
  }
  
  input[type="text"],
  input[type="number"] {
    padding: 8px 10px;
    margin: 8px 0;
    width: 80%;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
  }
  
  button {
    margin: 10px;
    padding: 10px 16px;
    background-color: #4a90e2;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #357ab8;
  }
  
  .rps-img {
    width: 120px;
    height: auto;
    margin: 10px;
    border-radius: 10px;
    border: 3px solid transparent;
    transition: border 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

  .rps-img:hover {
    border-color: #4a90e2;
    transform: scale(1.05);
  }

  .selected {
    border-color: #4a90e2;
    transform: scale(1.05);
    box-shadow: 0 0 8px rgba(74, 144, 226, 0.6);
  }
  
  #play_table {
    margin: 30px auto;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 20px;
    width: 90%;
    max-width: 800px;
  }
  
  #win_lose {
    font-size: 20px;
    font-weight: bold;
    margin-top: 15px;
    color: #222;
  }
  
  table {
    margin: auto;
    border-collapse: collapse;
    width: 80%;
  }
  
  th, td {
    border: 1px solid #ccc;
    padding: 12px;
    font-size: 16px;
  }
  
  thead {
    background-color: #4a90e2;
    color: white;
  }
  
  tbody tr:nth-child(even) {
    background-color: #f2f2f2;
  }