body {
  margin: 0;
  padding: 0;
  background-color: #f5f5f5;
  font-family: Arial, sans-serif;
}

.chart-container {
  width: 95%;
  max-width: 1200px;
  margin: 20px auto;
  background: #fff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.options-wrapper {
  text-align: center;
  margin-bottom: 10px;
}

#timeframe-select {
  padding: 10px;
  font-size: 16px;
}

#chart {
  width: 100%;
  height: 600px;
}