*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, sans-serif;
  background: #0a0a0a;
  color: #fafafa;
  overflow: hidden;
}

canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

#ui {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  z-index: 10;
  pointer-events: none;
  text-align: center;
}

#freq {
  font-family: 'Courier New', monospace;
  font-size: 0.8rem;
  color: rgba(100, 220, 255, 0.8);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

#hint {
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.22);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}