.skip-link{
  position:fixed;
  left:12px;
  top:10px;
  z-index:100000;
  padding:10px 14px;
  border-radius:8px;
  background:#fff;
  color:#111;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-160%);
  transition:transform .12s ease;
  box-shadow:0 8px 28px rgba(0,0,0,.25)
}
.skip-link:focus{transform:translateY(0)}
#mainContent:focus{outline:none}
@media(prefers-reduced-motion:reduce){.skip-link{transition:none}}