* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #121316;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #e0e6ed;
  touch-action: none;
  overscroll-behavior: none;
}

#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, #1b2028 0%, #0d0f12 100%);
}

#game-canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  background-color: transparent;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

#file-cors-warning {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 520px;
  padding: 24px;
  background: rgba(18, 22, 30, 0.95);
  border: 2px solid #e74c3c;
  border-radius: 8px;
  color: #ecf0f1;
  text-align: center;
  font-family: monospace;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
  display: none;
}
#file-cors-warning h2 {
  color: #e74c3c;
  margin-bottom: 12px;
  font-size: 18px;
}
#file-cors-warning p {
  font-size: 13px;
  line-height: 1.5;
  color: #bdc3c7;
  margin-bottom: 14px;
}
#file-cors-warning code {
  background: #2c3e50;
  padding: 4px 8px;
  border-radius: 4px;
  color: #00cec9;
}