* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #fff;
}

#game-canvas-container {
  position: relative;
  width: 96vmin;
  height: calc(96vmin * 304 / 432);
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}

#loading-box {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.9);
  z-index: 10;
  transition: opacity 0.3s ease;
}

#loading-box.hidden {
  display: none;
}

.loading-inner {
  text-align: center;
}

.loading-inner p {
  font-size: 16px;
  margin-bottom: 12px;
}

#progress-bar-border {
  width: 240px;
  height: 12px;
  border: 1px solid #fff;
  margin: 0 auto;
  padding: 1px;
}

#progress-bar {
  height: 100%;
  background: #fff;
  transition: width 0.1s ease;
}