Migration Progress Banner

<div class="nuda-ta2-migration-banner" role="status" aria-live="polite">
  <div class="nuda-ta2-migration-banner__row">
    <span class="nuda-ta2-migration-banner__spinner" aria-hidden="true"></span>
    <span class="nuda-ta2-migration-banner__text">Migrating your workspace to v3&hellip;</span>
    <span class="nuda-ta2-migration-banner__pct">68%</span>
  </div>
  <div class="nuda-ta2-migration-banner__track" aria-hidden="true">
    <div class="nuda-ta2-migration-banner__fill"></div>
  </div>
</div>

.nuda-ta2-migration-banner {
  --c: #e4ff54;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  background: #101012;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  padding: .65rem .9rem;
  width: 100%;
  max-width: 320px;
  animation: _nuda-ta2migrationin .3s ease-out both;
}

.nuda-ta2-migration-banner__row {
  display: flex;
  align-items: center;
  gap: .55rem;
}

.nuda-ta2-migration-banner__spinner {
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid rgba(228,255,84,.25);
  border-top-color: var(--c);
  animation: _nuda-ta2migrationspin .7s linear infinite;
}

.nuda-ta2-migration-banner__text {
  flex: 1;
  color: #e6e6e6;
  font-size: .78rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nuda-ta2-migration-banner__pct {
  flex-shrink: 0;
  color: var(--c);
  font-size: .72rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.nuda-ta2-migration-banner__track {
  position: relative;
  height: 4px;
  border-radius: 99px;
  background: rgba(255,255,255,.1);
  overflow: hidden;
}

.nuda-ta2-migration-banner__fill {
  position: absolute;
  inset: 0;
  transform-origin: left center;
  transform: scaleX(0);
  border-radius: 99px;
  background: var(--c);
  animation: _nuda-ta2migrationfill 4s cubic-bezier(.2,.7,.3,1) forwards;
}

@keyframes _nuda-ta2migrationin {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes _nuda-ta2migrationspin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes _nuda-ta2migrationfill {
  to {
    transform: scaleX(.68);
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-ta2-migration-banner {
    animation: none;
  }
  .nuda-ta2-migration-banner__spinner {
    animation: none;
  }
  .nuda-ta2-migration-banner__fill {
    animation: none;
    transform: scaleX(.68);
  }
}