:root {
  --env-banner-display: none;
  --env-banner-label: "";
  --env-banner-bg: rgba(255, 0, 0, 0.75);
}

html::before {
  content: "";
  display: var(--env-banner-display);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 10px;
  background-color: var(--env-banner-bg);
  z-index: 9999;
  pointer-events: none;
  user-select: none;
}

body::before,
body::after {
  content: var(--env-banner-label);
  display: var(--env-banner-display);
  position: fixed;
  top: 6px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  color: #fff;
  background-color: var(--env-banner-bg);
  border-radius: 999px;
  text-shadow:
    0 0 2px rgba(0, 0, 0, 0.45),
    0 0 6px rgba(0, 0, 0, 0.25);
  z-index: 10000;
  pointer-events: none;
  user-select: none;
}

body::before {
  left: 25%;
  transform: translateX(-50%);
}

body::after {
  left: 75%;
  transform: translateX(-50%);
}