.ci { } .ci-background { background: gray; width:max-content; border: solid 1px white; } .ci-highlight { width: 60px; height: 51px; outline: solid 3px yellow; outline-offset: 3px; visibility: hidden; } .ci-highlight:hover { visibility: visible; animation: blinker 1s linear infinite; } .ci-background:hover { border: hidden; animation: initial; } .ci:hover { } @keyframes blinker { 50% { opacity: 0; } }