body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #fafafa;
}
header {
  background: #3cac61;
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.chat-widget {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 300px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 15px rgba(0,0,0,0.2);
  background: white;
}
.chat-header {
  background: #3cac61;
  color: white;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  cursor: pointer;
}
.chat-body {
  padding: 10px;
}
.chat-body input {
  width: 100%;
  padding: 8px;
  margin-top: 10px;
  border-radius: 5px;
  border: 1px solid #ccc;
}