Copy Feedback

<button class="nuda-copy-feedback" data-copy="hello@nudaui.dev">
  <span class="nuda-copy-feedback__idle">Copy</span>
  <span class="nuda-copy-feedback__done">Copied!</span>
</button>

/* Copy Feedback — "Copy" slides out as "Copied!" slides in on click. */
.nuda-copy-feedback {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  padding: 10px 18px;
  background: #0c0c10;
  color: #fafafa;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 9px;
  font-weight: 600;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.25s, color 0.25s;
}

.nuda-copy-feedback__idle,
.nuda-copy-feedback__done {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.25s;
}

.nuda-copy-feedback__done {
  position: absolute;
  opacity: 0;
  transform: translateY(120%);
  color: #e4ff54;
}

.nuda-copy-feedback.is-copied { border-color: #e4ff54; }
.nuda-copy-feedback.is-copied .nuda-copy-feedback__idle {
  opacity: 0;
  transform: translateY(-120%);
}
.nuda-copy-feedback.is-copied .nuda-copy-feedback__done {
  opacity: 1;
  transform: translateY(0);
}

.nuda-copy-feedback:focus-visible {
  outline: 2px solid #e4ff54;
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .nuda-copy-feedback__idle,
  .nuda-copy-feedback__done { transition: opacity 0.2s; }
}

/* Copy Feedback — vanilla JS
   Copies data-copy text and morphs the label to "Copied!". */
(function () {
  document.querySelectorAll(".nuda-copy-feedback").forEach(function (btn) {
    btn.addEventListener("click", function () {
      var text = btn.getAttribute("data-copy") || "";
      if (navigator.clipboard) navigator.clipboard.writeText(text);
      btn.classList.add("is-copied");
      setTimeout(function () { btn.classList.remove("is-copied"); }, 1500);
    });
  });
})();