.demo-banner {
  position: fixed;
  z-index: 1000;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  width: max-content;
  max-width: calc(100vw - 32px);
  padding: 10px 18px;
  border-radius: 999px;
  background: #f5f2ea;
  color: #111;
  font: 500 14px/1.4 "IBM Plex Sans", system-ui, sans-serif;
  text-align: center;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}