[data-theme="dark"] {
  --bg: #0e0e0f;
  --fg: #ededec;
  --muted: #ededec99;
}

.theme-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  border: 1px solid var(--fg);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  opacity: 0.4;
  transition: opacity 150ms ease, border-color 150ms ease, color 150ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  opacity: 1;
  outline: none;
}

.theme-toggle svg {
  width: 1rem;
  height: 1rem;
}

.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }