body {
  font-family: Arial, sans-serif;
  margin: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
h1 {
  text-align: center;
  color: #333;
}
.chart-container {
  position: relative;
  height: 300px;
  width: 100%;
  margin-top: 20px;
}
#dollar-price {
  font-weight: bold;
  color: #007bff;
}