body {
    font-family: system-ui, sans-serif;
    margin: 0;
    background: #f4f6fb;
  }
  
  header {
    background: #232946;
    color: #fff;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    justify-content: space-between;
  }
  
  header select, header button {
    font-size: 1em;
    padding: 4px 8px;
    border-radius: 4px;
    border: none;
  }
  
  #chatContainer {
    max-width: 600px;
    margin: 30px auto 0 auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
    min-height: 400px;
    padding: 18px 10px 70px 10px;
    overflow-y: auto;
    height: 60vh;
    display: flex;
    flex-direction: column;
  }
  
  .message {
    display: flex;
    margin-bottom: 10px;
    align-items: flex-end;
  }
  
  .message.user {
    justify-content: flex-end;
  }
  
  .message.bot {
    justify-content: flex-start;
  }
  
  .bubble {
    max-width: 70%;
    padding: 10px 14px;
    border-radius: 20px;
    font-size: 1em;
    line-height: 1.5;
    word-break: break-word;
  }
  
  .user .bubble {
    background: #232946;
    color: #fff;
    border-bottom-right-radius: 4px;
  }
  
  .bot .bubble {
    background: #e7eaf6;
    color: #232946;
    border-bottom-left-radius: 4px;
  }
  
  #inputForm {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
    background: #fff;
    padding: 12px 10px;
    border-top: 1px solid #e7eaf6;
  }
  
  #userInput {
    flex: 1;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 1em;
  }
  
  #inputForm button {
    padding: 0 18px;
    border-radius: 6px;
    background: #232946;
    color: #fff;
    border: none;
    font-size: 1em;
    cursor: pointer;
  }
  
  .typing {
    font-size: 0.95em;
    color: #888;
    margin-left: 18px;
    margin-bottom: 8px;
  }
  
  .hidden {
    display: none !important;
  }
  
  /* Modal */
  .modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
  }
  
  .modal-content {
    background: #fff;
    padding: 32px 28px 24px 28px;
    border-radius: 12px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.12);
    min-width: 320px;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  
  .modal-content input {
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 1em;
  }
  
.toggle-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 1em;
  color: #fff;
}
.toggle-label input[type="checkbox"] {
  accent-color: #232946;
  width: 16px;
  height: 16px;
}
  .modal-content button {
    padding: 8px 0;
    border-radius: 6px;
    background: #232946;
    color: #fff;
    border: none;
    font-size: 1em;
    cursor: pointer;
  }
  
  .error {
    color: #c00;
    font-size: 0.95em;
    min-height: 18px;
  }