body {
  margin: 0;
  overflow: hidden;
  font-family: Arial, sans-serif;
  background: #000;
  color: #fff;
}

#ui {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 10;
  background: rgba(0, 0, 0, 0.55);
  padding: 10px;
  border-radius: 6px;
  max-width: 380px;
  font-size: 14px;
}

#stats div {
  margin-bottom: 4px;
}

#fieldInfo {
  margin-top: 4px;
}

#perf {
  margin-top: 4px;
}

#actions button,
#saveLoad button {
  margin: 3px 0;
  width: 100%;
}

#saveLoad {
  margin-top: 8px;
}

#saveName {
  width: 100%;
  margin-bottom: 4px;
  padding: 3px;
  box-sizing: border-box;
}

#leaderboard {
  margin-top: 8px;
  max-height: 200px;
  overflow-y: auto;
}

#leaderboard h3 {
  margin: 4px 0;
}

#leaderboardList {
  padding-left: 18px;
}

#help {
  margin-top: 8px;
  font-size: 12px;
  color: #ddd;
}

#startScreen {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top, #333, #000);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  z-index: 20;
  text-align: center;
}

#startScreen h1 {
  margin-bottom: 10px;
}

#startScreen button {
  padding: 8px 16px;
  font-size: 16px;
  cursor: pointer;
}