body {
  margin: 0;
  padding: 0;
  background-color: #f0f0f0;
  font-family: Arial, sans-serif;
  overflow: hidden;
}

canvas {
  border: none;
  background-color: white;
  display: block;
  margin: 0;
  padding: 0;
}

h1 {
  display: none;
}

#hud {
  position: fixed;
  top: 20px;
  left: 20px;
  background: rgba(80, 80, 80, 0.85);
  color: white;
  border: 1px solid white;
  border-radius: 4px;
  padding: 12px 18px;
  font-family: sans-serif;
  font-size: 20px;
  z-index: 1000;
  min-width: 180px;
  box-sizing: border-box;
}

#hud-generation,
#hud-population {
  margin: 0 0 4px 0;
  line-height: 1.3;
}

#hud-population {
  margin-bottom: 0;
} 

#hud-controls {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
  justify-content: center;
}

#hud-controls button {
  background: none;
  border: none;
  color: white;
  font-size: 22px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 3px;
  transition: background 0.2s;
}
#hud-controls button:hover {
  background: rgba(255,255,255,0.15);
}