body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background-color: #121212;
  color: #f5f5f5;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#chat-container {
  width: 100%;
  max-width: 720px;
  height: 90vh;
  display: flex;
  flex-direction: column;
  background-color: #1e1e1e;
  border-radius: 12px;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

header {
  padding: 16px;
  background-color: #2c2c2c;
  text-align: center;
  border-bottom: 1px solid #333;
}

#chat-window {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  padding: 12px 16px;
  border-radius: 16px;
  max-width: 80%;
  word-wrap: break-word;
  line-height: 1.4;
  font-size: 16px;
}

.user-message {
  align-self: flex-end;
  background-color: #0078d4;
  color: white;
}

.bot-message {
  align-self: flex-start;
  background-color: #2e2e2e;
  color: #d0d0d0;
}

#input-bar {
  display: flex;
  padding: 12px;
  background-color: #2c2c2c;
  border-top: 1px solid #333;
}

#input {
  flex: 1;
  padding: 10px;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #444;
  background-color: #1a1a1a;
  color: #f5f5f5;
  margin-right: 8px;
}

button {
  padding: 10px 18px;
  font-size: 16px;
  border: none;
  background-color: #0078d4;
  color: white;
  border-radius: 8px;
  cursor: pointer;
}