body {
  font-family: Arial;
  background: #111;
  color: white;
  text-align: center;
}

.card {
  background: #222;
  padding: 20px;
  margin: 20px;
  border-radius: 10px;
}

.buy { color: #00ff00; }
.sell { color: #ff0000; }
.hold { color: #ffff00; }