body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #000;
  overflow: hidden;
}

#container {
  width: 100vw;
  height: 100vh;
  position: relative;
}

#loader {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.9);
  color: white;
  font-size: 18px;
  font-weight: 500;
  z-index: 10;
  flex-direction: column;
  backdrop-filter: blur(10px);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255,255,255,0.2);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 15px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}