// Tag chip — a small filed label, shared by post-card and post-tags
.tag {
  display: inline-block;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  transition: var(--transition-smooth);

  &:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
  }
}

// Heavy hairline rule — the site's one recurring structural device
// (masthead, between list entries, above case-reference blocks)
.rule {
  border: none;
  border-top: 3px solid var(--text-color);
}

// Utilities / Interactions
.hover-scale {
  transition: transform 140ms ease-out;

  &:hover {
    transform: scale(1.02);
  }

  &:active {
    transform: scale(0.98);
  }
}