.chat-loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(17, 24, 39, 0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 300ms ease-out;
  pointer-events: none;
}

.chat-loading-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.loading-content {
  text-align: center;
  color: #f3f4f6;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(156, 163, 175, 0.3);
  border-top: 3px solid #60a5fa;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}

.loading-text {
  font-size: 16px;
  font-weight: 500;
  margin: 0;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}