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

html, body {
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
  font-family: system-ui, sans-serif;
}

canvas {
  width: 100vw;
  height: 100vh;
  display: block;
}

#ui {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

button {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background: rgba(255, 255, 255, 0.25);
}

.info {
  color: #ccc;
  font-size: 13px;
  margin-top: 10px;
  line-height: 1.4;
}