body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #101010;
  color: #fff;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

h1 {
  text-align: center;
  background-color: #1e1e2f;
  padding: 1rem;
  margin: 0;
  font-size: 1.5rem;
  border-bottom: 1px solid #333;
}

#chat {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  scroll-behavior: smooth;
}

.message {
  padding: 0.75rem 1rem;
  max-width: 80%;
  border-radius: 1rem;
  white-space: pre-wrap;
  word-wrap: break-word;
  animation: fadeIn 0.3s ease-in;
  position: relative;
  line-height: 1.5;
}

.user {
  background: linear-gradient(135deg, #4e8cff, #2d5ddd);
  align-self: flex-end;
  color: #fff;
}

.ai {
  background: #2c2c3c;
  align-self: flex-start;
  color: #e0e0e0;
}

#inputArea {
  display: flex;
  padding: 1rem;
  background-color: #1e1e2f;
  border-top: 1px solid #333;
}

#userInput {
  flex: 1;
  padding: 0.75rem;
  font-size: 1rem;
  border-radius: 8px;
  border: none;
  background-color: #2c2c3c;
  color: #fff;
}

button {
  margin-left: 1rem;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  border-radius: 8px;
  border: none;
  background-color: #4e8cff;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #2d5ddd;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}