.theme-toggle-btn,
.skin-toggle-btn {
  position: fixed;
  right: 1rem;
  z-index: 9999;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-button, 20px);
  border: 1px solid var(--ghost-extra-light);
  background: var(--paper);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.theme-toggle-btn {
  bottom: 1rem;
}

.skin-toggle-btn {
  bottom: 4.25rem;
}

.theme-toggle-btn:hover,
.skin-toggle-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.24);
}

.theme-toggle-btn:active,
.skin-toggle-btn:active {
  transform: translateY(0);
}

.theme-toggle-btn:focus-visible,
.skin-toggle-btn:focus-visible {
  outline: 2px solid var(--highlight);
  outline-offset: 2px;
}

.theme-toggle-btn .theme-toggle-icon,
.skin-toggle-btn .theme-toggle-icon {
  font-size: 0.95rem;
  line-height: 1;
  font-weight: 700;
}

:root[data-skin="rmb"] .theme-toggle-btn {
  opacity: 0.6;
}

.theme-toggle-btn.is-disabled {
  cursor: not-allowed;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.16);
}

:root[data-theme="dark"] .theme-toggle-btn {
  border-color: var(--ghost-dark);
}

:root[data-theme="dark"] .skin-toggle-btn {
  border-color: var(--ghost-dark);
}