html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #12161c;
}

.ai-shell-main {
  position: fixed;
  left: 0;
  right: 0;
  top: 60px;
  bottom: 0;
  background: #12161c;
}

.ai-shell-frame {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #12161c;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 120ms ease;
}

.ai-shell-frame.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
}

.ai-shell-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: rgba(255,255,255,0.72);
  font: 14px/1.5 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #12161c;
  z-index: 2;
}

.ai-shell-loading.is-hidden {
  display: none;
}