html {
  color-scheme: dark;
  scroll-padding-top: 116px;
}
html[data-theme="light"] { color-scheme: light; }
.topbar { height: 116px; }
.theme-toggle {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: #f1f4f5;
  cursor: pointer;
}
.theme-toggle:hover { color: #ffd617; }
.theme-toggle[aria-pressed="true"] { color: #ffd617; }
@media (max-width: 900px) {
  .topbar { gap: 16px; }
  .topbar nav { top: 100%; }
}