body {
  font-family: sans-serif;
  background: #f9f9f9;
  padding: 20px;
  text-align: center;
}
.container {
  max-width: 600px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
form {
  display: flex;
  flex-direction: column;
}
input, textarea {
  margin-bottom: 10px;
  padding: 10px;
  font-size: 16px;
}
button {
  padding: 10px;
  font-size: 16px;
  cursor: pointer;
}
#messages {
  margin-top: 20px;
  text-align: left;
}
.message {
  border-bottom: 1px solid #ddd;
  padding: 10px 0;
}