body {
  margin: 0;
  background: radial-gradient(circle at top, #2a0b5a, #050014 60%, #000);
  font-family: 'Orbitron', sans-serif;
  color: #fff;
}

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

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #ff2fd0;
  padding-bottom: 10px;
}

.chat-body {
  height: 70vh;
  overflow-y: auto;
  padding: 10px;
  border: 1px solid #00f6ff;
  border-radius: 10px;
  background: rgba(0,0,0,0.4);
}

.message {
  padding: 10px;
  margin-bottom: 10px;
  border-radius: 12px;
  max-width: 70%;
}

.user {
  background: #ff2fd0;
  margin-left: auto;
  color: #000;
}

.ai {
  background: #0b0220;
  border: 1px solid #00f6ff;
}

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

textarea {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  background: #0b0220;
  color: #fff;
  border: 1px solid #00f6ff;
}

button {
  margin-left: 10px;
  padding: 10px 16px;
  border-radius: 10px;
  background: #ff2fd0;
  border: none;
  cursor: pointer;
  color: #000;
  font-weight: bold;
}