body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  background-color: #0a0a0a;
  color: #00ffff;
}

.hero, header {
  text-align: center;
  padding: 2rem;
}

.hero p {
  margin: 1rem 0;
}

.button {
  background-color: #00ffff;
  color: #0a0a0a;
  padding: 10px 20px;
  text-decoration: none;
  font-weight: bold;
  border-radius: 5px;
}

.charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  padding: 2rem;
}

.chart-widget {
  height: 400px;
  border: 1px solid #222;
  background-color: #111;
}