* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  background: radial-gradient(circle at top, #283593 0, #0b1020 55%, #05060b 100%);
  color: #f5f5f5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 10px;
}

.ui {
  text-align: center;
  margin-bottom: 10px;
}

h1 {
  font-size: 26px;
  letter-spacing: 1px;
  margin-bottom: 6px;
  text-shadow: 0 0 12px rgba(0, 255, 255, 0.7);
}

.stats {
  display: flex;
  gap: 18px;
  justify-content: center;
  margin-bottom: 6px;
  font-size: 14px;
}

#startBtn {
  border: none;
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: linear-gradient(135deg, #00e676, #00c853);
  color: #fff;
  box-shadow: 0 0 18px rgba(0, 230, 118, 0.7);
  margin-bottom: 4px;
}

#startBtn:hover {
  filter: brightness(1.05);
}

.hint {
  font-size: 11px;
  opacity: 0.75;
}

canvas {
  border-radius: 20px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.7);
  border: 2px solid rgba(255, 255, 255, 0.08);
  touch-action: none;
}