.skip-content { position: fixed; top: 8px; left: 8px; transform: translateY(-200%); z-index: 100001; padding: 12px 18px; border-radius: 8px; background: #fff; color: #102342; font-weight: 700; }
.skip-content:focus { transform: translateY(0); }
:where(a, button, input, select, textarea, [role="button"]):focus-visible { outline: 3px solid #2563eb; outline-offset: 4px; }
[data-theme="dark"] :where(a, button, input, select, textarea, [role="button"]):focus-visible { outline-color: #93c5fd; }
@media (prefers-reduced-motion: reduce) {
  .math-floats, .hero-canvas { animation: none !important; }
  .reveal { transition: none !important; }
  html { scroll-behavior: auto !important; }
}