Changelog Popover

<!-- Changelog Popover — "what's new" trigger with an unread dot and an update list -->
<div class="nuda-ob2-changelog-popover">
  <button class="nuda-ob2-changelog-popover__trigger" type="button" aria-haspopup="dialog" aria-expanded="true" aria-label="What's new, 2 unread updates">
    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
      <path d="M12 2 C8 2 6 5 6 9 L6 13 L4 17 L20 17 L18 13 L18 9 C18 5 16 2 12 2 Z" />
      <path d="M9.5 20 a2.5 2.5 0 0 0 5 0" />
    </svg>
    <span class="nuda-ob2-changelog-popover__dot" aria-hidden="true"></span>
  </button>
  <div class="nuda-ob2-changelog-popover__panel" role="dialog" aria-label="What's new">
    <h4>What's new</h4>
    <ul>
      <li><span class="nuda-ob2-changelog-popover__tag">New</span>Dark mode scheduling</li>
      <li><span class="nuda-ob2-changelog-popover__tag nuda-ob2-changelog-popover__tag--fix">Fixed</span>Faster search results</li>
    </ul>
    <a class="nuda-ob2-changelog-popover__link" href="#">View all updates →</a>
  </div>
</div>

.nuda-ob2-changelog-popover {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  max-width: 280px;
}

.nuda-ob2-changelog-popover__trigger {
  position: relative;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 9px;
  color: #cfcfcf;
  cursor: pointer;
}

.nuda-ob2-changelog-popover__trigger::before {
  content: "";
  position: absolute;
  inset: -4px;
}

.nuda-ob2-changelog-popover__trigger:focus-visible {
  outline: 2px solid #e4ff54;
  outline-offset: 2px;
}

.nuda-ob2-changelog-popover__trigger svg {
  width: 17px;
  height: 17px;
}

.nuda-ob2-changelog-popover__dot {
  position: absolute;
  top: 5px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: #e4ff54;
  border: 2px solid #0a0a0a;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(228,255,84,.6);
}

.nuda-ob2-changelog-popover__dot::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 1.5px solid #e4ff54;
  animation: nuda-ob2-changelog-popover-ping 1.8s ease-out infinite;
}

.nuda-ob2-changelog-popover__panel {
  width: 100%;
  padding: 14px 16px;
  background: rgba(20,20,24,.97);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  box-shadow: 0 20px 44px -12px rgba(0,0,0,.6);
  animation: nuda-ob2-changelog-popover-in .35s cubic-bezier(.34,1.56,.64,1);
}

.nuda-ob2-changelog-popover__panel h4 {
  margin: 0 0 8px;
  font: 700 13px ui-sans-serif,system-ui;
  color: #fafafa;
}

.nuda-ob2-changelog-popover__panel ul {
  list-style: none;
  margin: 0 0 10px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.nuda-ob2-changelog-popover__panel li {
  display: flex;
  align-items: center;
  gap: 7px;
  font: 500 12px ui-sans-serif,system-ui;
  color: #cfcfcf;
}

.nuda-ob2-changelog-popover__tag {
  padding: 1px 6px;
  background: rgba(228,255,84,.15);
  color: #e4ff54;
  border: 1px solid rgba(228,255,84,.3);
  border-radius: 4px;
  font: 800 9px ui-sans-serif,system-ui;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.nuda-ob2-changelog-popover__tag--fix {
  background: rgba(255,255,255,.06);
  color: #a1a1aa;
  border-color: rgba(255,255,255,.12);
}

.nuda-ob2-changelog-popover__link {
  font: 700 11px ui-sans-serif,system-ui;
  color: #e4ff54;
  text-decoration: none;
}

.nuda-ob2-changelog-popover__link:hover {
  text-decoration: underline;
}

@keyframes nuda-ob2-changelog-popover-ping {
  0% {
    transform: scale(1);
    opacity: .8;
  }
  100% {
    transform: scale(1.9);
    opacity: 0;
  }
}

@keyframes nuda-ob2-changelog-popover-in {
  from {
    opacity: 0;
    transform: scale(.94) translateY(-6px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-ob2-changelog-popover__dot::after {
    animation: none;
    opacity: 0;
  }
  .nuda-ob2-changelog-popover__panel {
    animation: none;
  }
}