body {
  font-family: sans-serif;
  max-width: 500px;
  margin: 40px auto;
  padding: 0 16px;
  background: #fafafa;
  color: #222;
}

h1 {
  font-size: 1.4rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}

input,
textarea {
  font: inherit;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  font: inherit;
  padding: 8px;
  border: none;
  border-radius: 4px;
  background: #222;
  color: #fff;
  cursor: pointer;
}

button:hover {
  background: #444;
}

#messageList {
  list-style: none;
  padding: 0;
}

#messageList li {
  padding: 8px 0;
  border-bottom: 1px solid #ddd;
}

#messageList li strong {
  display: block;
}