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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000005;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  color: #ccc;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

#location {
  position: fixed;
  top: 12px;
  left: 16px;
  font-size: 12px;
  opacity: 0.5;
  z-index: 10;
  pointer-events: none;
}

#clock {
  position: fixed;
  top: 12px;
  right: 16px;
  font-size: 12px;
  opacity: 0.5;
  z-index: 10;
  pointer-events: none;
}

#fov {
  position: fixed;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  opacity: 0.35;
  z-index: 10;
  pointer-events: none;
}

#compass {
  position: fixed;
  bottom: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  z-index: 10;
  pointer-events: none;
}

#popup {
  display: none;
  position: fixed;
  z-index: 20;
  background: rgba(15, 15, 30, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 13px;
  line-height: 1.6;
  color: #ddd;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  max-width: 220px;
  pointer-events: auto;
}

#popup .star-name {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

#popup .star-constellation {
  color: #8899bb;
  font-size: 12px;
  margin-bottom: 8px;
}

#popup .star-detail {
  font-size: 11px;
  color: #99aabb;
}

#loading {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 14px;
  opacity: 0.4;
  z-index: 30;
  pointer-events: none;
}