Package Manager Tabs

<!-- Package Manager Tabs — switch .is-active between tabs to swap the install command -->
<div class="nuda-ct2-pkg-tabs">
  <div class="nuda-ct2-pkg-tabs__tabs" role="tablist" aria-label="Package manager">
    <button class="nuda-ct2-pkg-tabs__tab is-active" type="button" role="tab" aria-selected="true">npm</button>
    <button class="nuda-ct2-pkg-tabs__tab" type="button" role="tab" aria-selected="false">pnpm</button>
    <button class="nuda-ct2-pkg-tabs__tab" type="button" role="tab" aria-selected="false">yarn</button>
    <button class="nuda-ct2-pkg-tabs__tab" type="button" role="tab" aria-selected="false">bun</button>
  </div>
  <pre class="nuda-ct2-pkg-tabs__cmd"><code><span class="nuda-ct2-pkg-tabs__prompt">$</span> npm install nuda-ui<span class="nuda-ct2-pkg-tabs__caret"></span></code></pre>
</div>

.nuda-ct2-pkg-tabs {
  width: 280px;
  background: #09090b;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 8px;
  overflow: hidden;
  font: 500 11px ui-monospace,SFMono-Regular,Menlo,monospace;
}

.nuda-ct2-pkg-tabs__tabs {
  display: flex;
  background: #161616;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.nuda-ct2-pkg-tabs__tab {
  position: relative;
  flex: 1;
  min-height: 32px;
  padding: 8px 6px;
  background: transparent;
  border: none;
  color: #a1a1aa;
  font: 600 10px ui-sans-serif,system-ui;
  cursor: pointer;
  transition: background .2s,color .2s;
}

.nuda-ct2-pkg-tabs__tab:hover {
  color: #fafafa;
  background: rgba(255,255,255,.04);
}

.nuda-ct2-pkg-tabs__tab:focus-visible {
  outline: 2px solid #e4ff54;
  outline-offset: -2px;
}

.nuda-ct2-pkg-tabs__tab.is-active {
  color: #e4ff54;
}

.nuda-ct2-pkg-tabs__tab.is-active::after {
  content: "";
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 0;
  height: 2px;
  background: #e4ff54;
  border-radius: 2px 2px 0 0;
  animation: _nuda-ct2pkgtabsglow 2.4s ease-in-out infinite;
}

.nuda-ct2-pkg-tabs__cmd {
  margin: 0;
  padding: 11px 12px;
  color: #fafafa;
}

.nuda-ct2-pkg-tabs__prompt {
  color: #e4ff54;
  font-weight: 700;
}

.nuda-ct2-pkg-tabs__caret {
  display: inline-block;
  width: 6px;
  height: 11px;
  margin-left: 2px;
  background: #e4ff54;
  vertical-align: -2px;
  animation: _nuda-ct2pkgtabsblink 1s steps(2) infinite;
}

@keyframes _nuda-ct2pkgtabsglow {
  0%,100% {
    box-shadow: 0 0 2px rgba(228,255,84,.3);
  }
  50% {
    box-shadow: 0 0 8px rgba(228,255,84,.7);
  }
}

@keyframes _nuda-ct2pkgtabsblink {
  50% {
    opacity: 0;
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-ct2-pkg-tabs__tab.is-active::after {
    animation: none;
  }
  .nuda-ct2-pkg-tabs__caret {
    animation: none;
  }
}