body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #000; /* Black background for the night sky */
    color: #fff;
  }
  #app {
    display: flex;
    flex-direction: column;
    height: 100vh;
  }
  header {
    padding: 10px;
    background-color: #111;
  }
  #starChartContainer {
    flex: 1;
    position: relative;
  }
  #toolbar {
    padding: 10px;
    background-color: #111;
  }
/* Add to your style.css */
#instructions {
  position: absolute;
  top: 120px;
  left: 10px;
  background-color: rgba(17, 17, 17, 0.8);
  color: #fff;
  padding: 10px;
  border-radius: 5px;
}