body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif; }
a:hover { opacity: 0.8; }
article:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
@media (max-width: 768px) {
  nav ul { font-size: 0.85rem; }
  h1 { font-size: 1.8rem !important; }
  h2 { font-size: 1.4rem !important; }
}