body {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  padding: 40px;
  background-color: #f9f9f9;
  color: #111;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  background: white;
  border: 4px solid black;
  padding: 30px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
  border-radius: 10px;
}

.address {
  margin-bottom: 18px;
}

.subject {
  font-weight: bold;
  margin-bottom: 16px;
}

.content {
  margin-bottom: 30px;
}

.signature {
  margin-top: 40px;
}

.right-sign {
  text-align: right;
}

@media print {
  body {
    padding: 10px;
    background: white;
  }
  .container {
    box-shadow: none;
    border: none;
  }
}