* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0b0e14;
}
#game-canvas {
  display: block;
  width: 100vw;
  height: 100vh;
}
#ui-root {
  position: fixed;
  inset: 0;
  pointer-events: none;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: #eaf0f7;
  user-select: none;
  overflow: hidden;
}
#ui-root .clickable { pointer-events: auto; }