body {
  font-family: sans-serif;
  background: #f7f7f7;
  margin: 2em;
}

#chat-box {
  max-width: 700px;
  margin: 0 auto;
  background: #fff;
  padding: 1em;
  border-radius: 8px;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
}

.msg {
  margin: .5em 0;
  padding: .6em .8em;
  border-radius: 12px;
  max-width: 80%;
  word-wrap: break-word;
  white-space: pre-wrap;
  line-height: 1.4;
}

.user {
  background: #d1e7dd;
  margin-left: auto;
  text-align: right;
}

.bot {
  background: #f8d7da;
  margin-right: auto;
}

form {
  display: flex;
  gap: .5em;
  margin-top: 1em;
}

input[type=text] {
  flex: 1;
  padding: .6em;
  border-radius: 8px;
  border: 1px solid #ccc;
}

button {
  padding: .6em 1em;
  border-radius: 8px;
  border: none;
  background: #007bff;
  color: white;
  cursor: pointer;
}

button:disabled {
  background: #aaa;
}