Bottom Sheet

<div class="nuda-bsheet-backdrop" id="bottom-sheet">
  <div class="nuda-bsheet" role="dialog" aria-label="Bottom sheet">
    <div class="nuda-bsheet__handle"></div>
    <h3 class="nuda-bsheet__title">Title</h3>
    <p class="nuda-bsheet__body">Sheet content goes here.</p>
  </div>
</div>

/* Bottom Sheet
   Mobile-style bottom sheet that slides up.
   Customize: --sheet-bg, --sheet-handle */

.nuda-bsheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.nuda-bsheet-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.nuda-bsheet {
  --sheet-bg: #141414;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--sheet-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px 16px 0 0;
  padding: 1rem 1.5rem 2rem;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.nuda-bsheet-backdrop.is-open .nuda-bsheet {
  transform: translateY(0);
}

.nuda-bsheet__handle {
  width: 36px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  margin: 0 auto 1rem;
}

.nuda-bsheet__title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 0.5rem;
}

.nuda-bsheet__body {
  font-size: 0.85rem;
  color: #999;
}

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

/* Bottom Sheet — Toggle with .is-open class */

(function () {
  var backdrop = document.getElementById('bottom-sheet');
  if (!backdrop) return;

  function close() {
    backdrop.classList.remove('is-open');
  }

  backdrop.addEventListener('click', function (e) {
    if (e.target === backdrop) close();
  });

  document.addEventListener('keydown', function (e) {
    if (e.key === 'Escape') close();
  });

  // To open: backdrop.classList.add('is-open');
})();