*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; background: #000; overflow: hidden; }
canvas { display: block; width: 100% !important; height: 100% !important; }

#loading {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: system-ui, sans-serif; font-size: 1.1rem;
  letter-spacing: 0.05em; pointer-events: none;
  transition: opacity 0.4s ease;
}
#loading.hidden { opacity: 0; }