<div class="card-10">
  <div class="card-10__glow"></div>
  <span class="card-10__tag">Light</span>
  <h4 class="card-10__title">Spotlight</h4>
  <p class="card-10__body">Cursor glow follows your mouse inside the card.</p>
</div>

.card-10__tag {
  font-family: monospace;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 20px;
  background: rgba(124, 108, 255, 0.15);
  color: #7c6cff;
  border: 1px solid rgba(124, 108, 255, 0.3);
  display: inline-block;
  margin-bottom: 10px;
}
.card-10__title {
  font-size: 17px;
  font-weight: 700;
  color: #f0eeff;
  margin-bottom: 6px;
}
.card-10__body {
  font-size: 13px;
  color: #b8b6d4;
  line-height: 1.6;
}
.card-10 {
  width: 100%;
  max-width: 280px;
  position: relative;
  overflow: hidden;
  padding: 22px;
  border-radius: 14px;
  background: #111118;
  border: 1px solid rgba(255, 255, 255, 0.07);
  cursor: none;
  transition: border-color 0.3s;
}
.card-10:hover {
  border-color: rgba(124, 108, 255, 0.4);
}
.card-10__glow {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 108, 255, 0.25) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
  top: 50%;
  left: 50%;
}
.card-10:hover .card-10__glow {
  opacity: 1;
}
.card-10__tag,
.card-10__title,
.card-10__body {
  position: relative;
  z-index: 1;
}

document.querySelectorAll(".card-10").forEach(function (card) {
  var glow = card.querySelector(".card-10__glow");
  card.addEventListener("mousemove", function (e) {
    var r = card.getBoundingClientRect();
    glow.style.left = (e.clientX - r.left) + "px";
    glow.style.top  = (e.clientY - r.top)  + "px";
  });
});