html, body { margin: 0; width: 100%; height: 100%; overflow: hidden; background: #1e1e1e; overscroll-behavior: none; touch-action: none; }
canvas { display: block; }
#loading {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: #1e1e1e;
  color: #cfcfcf;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  z-index: 9999;
  transition: opacity 0.4s ease;
}
#loading.hide { opacity: 0; pointer-events: none; }
#loading .title { font-size: 16px; font-weight: 600; }
#loading .sub { font-size: 12px; color: #8a8a8a; }
#loading .spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #2e2e2e;
  border-top-color: #3399e6;
  border-radius: 50%;
  animation: cwx-spin 0.9s linear infinite;
}
@keyframes cwx-spin { to { transform: rotate(360deg); } }