Previous selector
HTML
<div class="card"></div>
<div class="card"></div>
<div class="card"></div>
<div class="card"></div>
<div class="card"></div>
<div class="card"></div>
<div class="card"></div>
CSS
div {
height: 100px;
width: 100px;
background: blue;
}
.card:hover {
background: green;
}
:has(+ .card:hover) {
background: red;
}
.card:hover + div {
background: red;
}