body {
  background: #0f172a;
  color: #f1f5f9;
  font-family: 'Prompt', sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  height: 100vh;
  padding: 1rem;
}
#chat {
  border: 1px solid #334155;
  border-radius: 8px;
  padding: 1rem;
  width: 100%;
  max-width: 600px;
  height: 60vh;
  overflow-y: auto;
  background: #1e293b;
  margin-bottom: 1rem;
}
.msg { margin-bottom: 1em; }
.user { color: #38bdf8; }
.ai { color: #a78bfa; }
input, button {
  padding: 0.6rem;
  font-size: 1em;
  border-radius: 6px;
  border: none;
  margin-right: 0.5rem;
}
#inputArea {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}