.top-bar {
  display: flex;
  justify-content: flex-end;
  padding: 0.75rem 1rem 0;
  position: fixed;
  right: 0;
  top: 0;
  z-index: 10000;
}

.darkness-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: radial-gradient(
    circle 175px at var(--x, 50%) var(--y, 50%),
    transparent 0%,
    rgba(0,0,0,0.97) 100%
  );
  display: none;
}
.darkness-overlay.active { display: block; }

.darkness-toggle {
  align-items: center;
  background: transparent;
  border: 1px solid var(--palette-border);
  border-radius: 999px;
  color: var(--palette-primary);
  cursor: pointer;
  display: inline-flex;
  height: 2.25rem;
  justify-content: center;
  padding: 0;
  width: 2.25rem;
  margin: 0.5rem;
}

.darkness-toggle .material-symbols-outlined {
  font-size: 1.25rem;
  font-variation-settings: 'FILL' 0;
  line-height: 1;
}