body {
    font-family: Arial, sans-serif;
    background: #f9f9f9;
    padding: 20px;
    box-sizing: border-box;
}


  /* ========================
     Card Layouts
  ======================== */
  .card {
    position: relative;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    padding: 20px;
    max-width: 700px;
    margin: 20px auto;
  }
  
  /* ========================
     Ribbons, Audit, Signature
  ======================== */
  .ribbon {
    position: absolute;
    top: -10px;
    right: -10px;
    background: #4CAF50;
    color: white;
    padding: 5px 10px;
    font-size: 12px;
    border-radius: 5px;
  }
  
  .audit {
    background: #fcfcfc;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 10px;
    margin-top: 20px;
  }
  
  .signature {
    margin-top: 20px;
    text-align: center;
    border: 1px dashed #ccc;
    padding: 10px;
    border-radius: 5px;
    background: #fafafa;
  }
  
  .signature img {
    max-width: 300px;
  }
  
  /* ========================
     Button Styles
  ======================== */
  .button {
    background: #4CAF50;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    border: none;
    font-size: 14px;
    cursor: pointer;
    display: inline-block;
    transition: background 0.2s ease;
  }
  
  .button:hover {
    background: #45a049;
  }
  
  .button-border {
    background: white;
    color: #4CAF50;
    border: 2px solid #4CAF50;
  }
  
  .button-border:hover {
    background: #e8f5e9;
  }
  
  /* ========================
     Button Container
  ======================== */
  .buttons {
    margin-top: 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }
  
  .buttons .button {
    flex: 1 1 auto;
    min-width: 160px;
    text-align: center;
  }
  
  @media print {
    .buttons {
      display: none;
    }
  }
  
  /* ========================
     Misc
  ======================== */
  .lock-notice {
    background: #fef8e7;
    border: 1px solid #f9d97a;
    padding: 10px;
    border-radius: 5px;
    margin-top: 20px;
    color: #9c6b1e;
  }
  
  .invoice-summary {
    background: #f4f9f4;
    border-left: 6px solid #4caf50;
    padding: 12px;
    margin: 15px 0;
    border-radius: 5px;
    font-size: 16px;
  }
  
  .invoice-summary h4 {
    margin-top: 0;
    color: #2e7d32;
  }
  
  
  .watermark {
    position: fixed;
    top: 30%;
    left: 25%;
    font-size: 40px;
    color: rgba(200, 200, 200, 0.15);
    transform: rotate(-30deg);
    z-index: -1;
    width: 100%;
    text-align: center;
  }