body {
      font-family: Arial, sans-serif;
      margin: 20px;
      line-height: 1.6;
    }
    h1 { color: #003366; }
    .intro { font-style: italic; margin-bottom: 16px; }
    .message-box {
      border: 1px solid #ccc;
      background-color: #f9f9f9;
      padding: 18px;
      margin: 20px 0;
      border-radius: 8px;
      white-space: pre-line;
    }
    .from-subject {
      background-color: #eef2f7;
      padding: 10px;
      border-left: 4px solid #003366;
      margin-bottom: 10px;
    }
    .button-like {
      display: inline-block;
      padding: 10px 16px;
      border-radius: 6px;
      border: 1px solid #003366;
      text-decoration: none;
      font-weight: bold;
      margin-top: 12px;
    }