body {
    font-family: sans-serif;
    background: #FFF8E1;
    margin: 0;
    padding: 16px;
  }
  
  .card {
    background: #ffffff;
    border-radius: 16px;
    padding: 16px;
    max-width: 520px;
    margin: 0 auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  }
  
  h1 {
    margin-top: 0;
    color: #BF360C;
    font-size: 24px;
  }
  
  label {
    display: block;
    margin-top: 12px;
    font-weight: bold;
  }
  
  input {
    width: 100%;
    box-sizing: border-box;
    margin-top: 6px;
    padding: 12px;
    font-size: 18px;
    border: 1px solid #ccc;
    border-radius: 10px;
  }
  
  button {
    width: 100%;
    margin-top: 20px;
    padding: 14px;
    font-size: 20px;
    font-weight: bold;
    color: white;
    background: #C62828;
    border: none;
    border-radius: 12px;
  }
  
  .preview {
    margin-top: 12px;
    text-align: center;
  }
  
  .preview img {
    max-width: 100%;
    max-height: 220px;
    border-radius: 12px;
  }
  
  .message {
    margin-top: 16px;
    padding: 12px;
    border-radius: 10px;
    display: none;
    white-space: pre-wrap;
    background: #E3F2FD;
    color: #0D47A1;
  }