Glass Tooltip

<div class="nuda-glasstip-wrap">
  <button class="nuda-glasstip__trigger" aria-describedby="glasstip-tip-1">
    Hover me
  </button>
  <div class="nuda-glasstip" role="tooltip" id="glasstip-tip-1">
    Frosted glass
  </div>
</div>

/* Glass Tooltip
   Frosted glassmorphism tooltip that fades + scales up.
   Shows on hover and keyboard focus.
   Customize: --glasstip-bg, blur radius */

.nuda-glasstip-wrap {
  position: relative;
  display: inline-block;
}

.nuda-glasstip__trigger {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #ccc;
  padding: 0.45rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
}

.nuda-glasstip {
  --glasstip-bg: rgba(20, 20, 24, 0.55);
  position: absolute;
  bottom: calc(100% + 9px);
  left: 50%;
  transform: translateX(-50%) translateY(6px) scale(0.96);
  background: var(--glasstip-bg);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fafafa;
  font-size: 0.75rem;
  padding: 0.4rem 0.8rem;
  border-radius: 9px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow:
    0 8px 24px -8px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: opacity 0.25s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.nuda-glasstip-wrap:hover .nuda-glasstip,
.nuda-glasstip__trigger:focus-visible + .nuda-glasstip {
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1);
}

@media (prefers-reduced-motion: reduce) {
  .nuda-glasstip { transition: none; }
}