body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: auto;
  background: #fff;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 22px;
  color: #333;
  margin-bottom: 10px;
}

form {
  margin-bottom: 20px;
}

input[type="file"] {
  padding: 6px;
}

button {
  margin-top: 10px;
  padding: 8px 12px;
  background-color: #2c7be5;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #1a5fd2;
}

#chatBox {
  border: 1px solid #ccc;
  padding: 10px;
  border-radius: 5px;
  background: #fafafa;
}

#messages {
  height: 150px;
  overflow-y: auto;
  border: 1px solid #ddd;
  padding: 10px;
  margin-bottom: 10px;
  background: white;
}

#chatInput {
  width: calc(100% - 70px);
  padding: 8px;
  margin-right: 5px;
}

#sendBtn {
  padding: 8px 12px;
}