@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:wght@400;600&display=swap');
body{font-family:'IBM Plex Serif',serif;background:#0c121a;color:#eef4ff;padding:24px}
#chart{white-space:pre;font-family:monospace;margin:10px 0}
button{padding:6px 10px;border-radius:6px;border:1px solid #3a4f66;background:#17202a;color:#e6f0ff}