/* Keyboard-only focus - mouse users never see this */
  :focus-visible { outline: 3px solid #4F46E5 !important; outline-offset: 2px !important; border-radius: 4px; }
  /* Skip link - visible only on keyboard focus */
  .brain-skip { position: fixed; top: -60px; right: 12px; z-index: 100000; background: #1E1B4B; color: #fff;
    padding: 10px 18px; border-radius: 10px; font-size: 15px; text-decoration: none; transition: top .15s; }
  .brain-skip:focus { top: 12px; }
  /* Opt-in modes */
  html.a11y-fs1 body { zoom: 1.12; } html.a11y-fs2 body { zoom: 1.25; }
  html.a11y-contrast { filter: contrast(1.25); }
  html.a11y-links a { text-decoration: underline !important; font-weight: 700 !important; }
  html.a11y-nomotion *, html.a11y-nomotion *::before, html.a11y-nomotion *::after {
    animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  html.a11y-font body, html.a11y-font body * { font-family: Arial, Helvetica, sans-serif !important; }
  /* The button + menu */
  #brain-a11y-btn { position: fixed; bottom: 18px; left: 18px; z-index: 99999; width: 44px; height: 44px;
    border-radius: 50%; border: none; cursor: pointer; background: #1E1B4B; color: #fff;
    display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 10px rgba(30,27,75,.35); padding: 0; }
  #brain-a11y-btn:hover { background: #4F46E5; }
  #brain-a11y-menu { position: fixed; bottom: 72px; left: 18px; z-index: 99999; background: #fff; color: #1E1B4B;
    border-radius: 14px; box-shadow: 0 6px 30px rgba(30,27,75,.25); padding: 14px; width: 230px; display: none;
    direction: rtl; text-align: right; font-family: Arial, sans-serif; font-size: 14px; }
  #brain-a11y-menu.open { display: block; }
  #brain-a11y-menu h2 { font-size: 15px; margin: 0 0 10px; }
  #brain-a11y-menu button { display: block; width: 100%; margin: 4px 0; padding: 8px 10px; border-radius: 8px;
    border: 1px solid #E0E7FF; background: #F8FAFC; cursor: pointer; font-size: 13px; text-align: right; color: #1E1B4B; }
  #brain-a11y-menu button[aria-pressed="true"] { background: #4F46E5; color: #fff; border-color: #4F46E5; }
  #brain-a11y-menu a { display: block; margin-top: 10px; font-size: 12px; color: #4F46E5; }