body {
  background: #0f172a;
  font-family: system-ui;
  color: #e5e7eb;
}

.app {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

header {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 15px;
}

#chat {
  background: #020617;
  border-radius: 8px;
  padding: 15px;
  height: 60vh;
  overflow-y: auto;
}

.user {
  background: #1e293b;
  padding: 10px;
  border-radius: 6px;
  margin-bottom: 10px;
}

.ai {
  background: #020617;
  border-left: 4px solid #38bdf8;
  padding: 10px;
  margin-bottom: 10px;
}

.input-bar {
  display: flex;
  margin-top: 10px;
  gap: 10px;
}

textarea {
  flex: 1;
  background: #020617;
  color: white;
  border: 1px solid #334155;
  padding: 10px;
  border-radius: 6px;
}

button {
  background: #38bdf8;
  border: none;
  padding: 0 20px;
  border-radius: 6px;
  cursor: pointer;
}