body {
  background-color: #0d0d0d;
  color: white;
  font-family: Arial, sans-serif;
}
#portfolio-header {
  padding: 20px;
  background-color: #1e1e1e;
}
.balance {
  font-size: 2em;
}
.risk-level {
  margin-top: 15px;
}