:focus{outline:2px solid #d33; outline-offset:2px}
:focus-visible{outline:3px solid #d33; outline-offset:2px}
.nav-links a:hover,.nav-links a:focus{filter:brightness(0.9)}
.cta{border:1px solid transparent}
.cta:hover,.cta:focus{filter:brightness(0.95)}
/* Decorative images should have empty alt="" in markup; content images meaningful alt */