/* Footer — subtle page terminator */
.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  position: relative;
  flex-shrink: 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 1200px;
}

.footer__brand {
  font-weight: var(--weight-medium);
  color: var(--color-text-tertiary);
}

.footer__separator {
  color: var(--color-border);
  user-select: none;
}

.footer__hint {
  color: var(--color-text-tertiary);
}

.footer__formats {
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
}

/* Scroll-to-top button */
.footer__scroll-top {
  position: absolute;
  right: var(--space-6);
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.footer__scroll-top .icon {
  transform: rotate(180deg);
}

.footer__scroll-top:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background-color: var(--color-primary-subtle);
}

.footer__scroll-top:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.footer__scroll-top.is-hidden {
  display: none;
}

/* Mobile: hide footer (fixed bottom toolbar takes precedence) */
@media (max-width: 640px) {
  .footer {
    display: none;
  }
}