.skip-link {position: absolute;top: -40px;left: 0;background: #000;color: #fff;padding: 8px;z-index: 100;text-decoration: none;transition: top 0.3s;}
.skip-link:focus {top: 0;}
.sr-only {position: absolute;width: 1px;height: 1px;padding: 0;margin: -1px;overflow: hidden;clip: rect(0, 0, 0, 0);border: 0;}
.sr-only-focusable:active,.sr-only-focusable:focus {position: static;width: auto;height: auto;margin: 0;overflow: visible;clip: auto;}