* {
      box-sizing: border-box;
    }

    body {
      font-family: Arial, sans-serif;
      margin: 0;
      padding: 20px;
      background-color: #f9f9f9;
    }

    .container {
      max-width: 700px;
      margin: auto;
      background: white;
      padding: 20px;
      border: 1px solid #ccc;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    h2, h3 {
      text-align: center;
      margin: 5px 0;
    }

    p {
      margin: 5px 0;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 15px;
    }

    th, td {
      border: 1px solid #444;
      padding: 10px;
      text-align: left;
      font-size: 14px;
    }

    .stamp {
      color: green;
      font-weight: bold;
      text-align: center;
      margin-top: 20px;
      font-size: 16px;
    }

    .sign {
      display: flex;
      justify-content: space-between;
      margin-top: 40px;
      flex-wrap: wrap;
    }

    .sign div {
      margin-top: 20px;
      width: 48%;
      text-align: center;
    }

    .footer {
      margin-top: 30px;
      text-align: center;
      font-size: 14px;
    }

    @media (max-width: 600px) {
      .sign div {
        width: 100%;
      }

      th, td {
        font-size: 12px;
        padding: 8px;
      }

      .container {
        padding: 15px;
      }
    }