.topbar {
  align-items: center;
  background: transparent;
  display: flex;
  gap: 4px;
  height: var(--spacing-top-bar);
  justify-content: space-between;
  left: 0;
  padding: var(--spacing-md) var(--spacing-md) 0;
  pointer-events: none;
  position: fixed;
  right: 0;
  top: 0;
  z-index: 100;
}
.topbar-spacer {
  flex: 1;
}
.topbar-btn.btn {
  backdrop-filter: blur(8px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: 0 2px 8px #0000001a;
  color: var(--color-text);
  height: 40px;
  padding: 0;
  pointer-events: auto;
  width: 40px;
}
.topbar-btn.btn:focus,
.topbar-btn.btn:hover {
  background: var(--color-background);
  box-shadow: 0 4px 12px #00000026;
}
.theme-btn svg {
  transition: transform var(--transition-normal);
}
.menu-btn svg {
  height: 1.5rem;
}
.theme-btn:focus svg,
.theme-btn:hover svg {
  transform: rotate(15deg);
}
.topbar-btn.share-btn {
  margin-right: var(--scrollbar-offset, 0);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast),
    margin-right 0s;
}