.matrix-btn:focus, .matrix-input:focus, .matrix-link:focus {
    outline: 3px solid #4a9eff; outline-offset: 2px;
}
.matrix-skip-link {
    position: absolute; top: -40px; left: 0; background: #1e3a5f;
    color: #fff; padding: 8px; z-index: 100000; transition: top 0.3s;
}
.matrix-skip-link:focus { top: 0; }
.matrix-sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition-duration: 0.01ms !important; }
}