body {
  font-family: Arial, sans-serif;
  background: #ece5dd;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.chat-container {
  width: 400px;
  height: 600px;
  background: #fff;
  display: flex;
  flex-direction: column;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.chat-header {
  background: #075E54;
  color: white;
  padding: 15px;
  text-align: center;
  font-weight: bold;
}

.chat-messages {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
  background: #ece5dd;
}

.message {
  margin: 8px 0;
  padding: 10px;
  border-radius: 8px;
  max-width: 70%;
  clear: both;
}

.message.sent {
  background: #dcf8c6;
  float: right;
}

.message.received {
  background: #fff;
  float: left;
}

.chat-input {
  display: flex;
  padding: 10px;
  border-top: 1px solid #ccc;
  background: #f0f0f0;
}

.chat-input input {
  flex: 1;
  padding: 10px;
  border-radius: 20px;
  border: 1px solid #ccc;
  outline: none;
}

.chat-input button {
  margin-left: 10px;
  padding: 10px 15px;
  border: none;
  background: #075E54;
  color: white;
  border-radius: 50%;
  cursor: pointer;
}