body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #fff;
}
#chatbot-bubble {
  position: fixed;
  bottom: 25px;
  right: 25px;
  background: #003366;
  color: #fff;
  padding: 15px;
  border-radius: 50%;
  font-size: 22px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}
#chat-window {
  display: none;
  position: fixed;
  bottom: 90px;
  right: 25px;
  width: 320px;
  height: 450px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  overflow: hidden;
  flex-direction: column;
}
.chat-header {
  background: #003366;
  color: #fff;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.chat-header img { margin-right: 8px; }
#chat-body {
  height: 340px;
  padding: 10px;
  overflow-y: auto;
}
.chat-input {
  display: flex;
  padding: 8px;
  border-top: 1px solid #ddd;
}
.chat-input input {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
}
.chat-input button {
  background: #00C853;
  color: #fff;
  border: none;
  padding: 6px 10px;
  margin-left: 8px;
  border-radius: 4px;
}
.message {
  margin: 8px 0;
}
.user { text-align: right; }
.bot { text-align: left; color: #003366; }
.typing { font-style: italic; color: #777; }