body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
}

.container {
  max-width: 600px;
  margin: 100px auto;
  padding: 20px;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  color: #333;
}

form {
  text-align: center;
  margin-bottom: 20px;
}

input[type="text"] {
  width: 60%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  outline: none;
}

button {
  padding: 10px 20px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.error {
  color: #ff0000;
}

.packet-details {
  background-color: #f8f9fa;
  padding: 10px;
  border-radius: 4px;
  margin-top: 20px;
}

.packet-details h2 {
  color: #333;
  margin-bottom: 10px;
}

.packet-details p {
  margin: 5px 0;
}