Vertical Pagination Rail

<nav aria-label="Pagination" class="nuda-pg2-rail">
  <button class="nuda-pg2-rail__item" aria-label="Slide 1"></button>
  <button class="nuda-pg2-rail__item nuda-pg2-rail__item--on" aria-current="page" aria-label="Slide 2"></button>
  <button class="nuda-pg2-rail__item" aria-label="Slide 3"></button>
  <button class="nuda-pg2-rail__item" aria-label="Slide 4"></button>
</nav>

.nuda-pg2-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .15rem;
  width: 44px;
}

.nuda-pg2-rail__item {
  position: relative;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nuda-pg2-rail__item::before {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,.25);
  transition: transform .2s,background .2s;
}

.nuda-pg2-rail__item:hover::before {
  background: rgba(255,255,255,.5);
}

.nuda-pg2-rail__item:focus-visible {
  outline: 2px solid #e4ff54;
  outline-offset: 2px;
}

.nuda-pg2-rail__item--on::before {
  background: #e4ff54;
  transform: scale(1.7);
  animation: _nuda-pg2railpop .3s ease-out;
}

@keyframes _nuda-pg2railpop {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.7);
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-pg2-rail__item--on::before {
    animation: none !important;
  }
}