body,
html {
  margin: 0;
  height: 100%;
  overflow: hidden;
}

canvas {
  width: 100%;
  height: 100%;
}

#fullscreenBtn {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 10;
}


.button-panel {
  position: absolute;
  top: 100px;
  left: 0;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px;
    justify-content: center; /* center the buttons horizontally */
    z-index: 10; /* make sure it's above the canvas */
}

.frosted {
  backdrop-filter: blur(5px);
  background-color: rgba(255, 255, 255, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: black;
  border-radius: 5px;
  padding: 8px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.frosted:hover {
  background-color: rgba(255, 255, 255, 0.5);
}

.flight-btn {
  margin: 4px;
  min-width: 80px;
}

.highlight {
  outline: 2px solid yellow;
  box-shadow: 0 0 8px rgba(255, 255, 0, 0.7);
}