html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #0f1115;
  color: #e6e6e6;
  font-family: "Segoe UI", system-ui, sans-serif;
  overflow: hidden;
  touch-action: none;
  overscroll-behavior: none;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.overlay {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 10;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 12px 16px;
}

.title {
  font-weight: 600;
  font-size: 16px;
}

.hint {
  font-size: 12px;
  opacity: 0.8;
}