/* Layout-neutral compact progress strip. Host pages own its placement. */
.progress-pagination {
  display: grid;
  grid-template-columns: repeat(var(--progress-pagination-count, 5), minmax(0, 1fr));
  height: 4px;
  gap: var(--progress-pagination-gap, 18px);
}

.progress-pagination > span {
  position: relative;
  height: 2px;
  padding: 0;
  border-top: 2px solid var(--progress-pagination-track, var(--theme-divider, #d3d3d1));
  font-size: 0;
  line-height: 0;
}

.progress-pagination > span::before {
  content: "";
  position: absolute;
  left: 0;
  top: -2px;
  width: 100%;
  border-top: 2px solid var(--progress-pagination-accent, var(--color-accent, #fa4d7e));
  transform: scaleX(0);
  transform-origin: left;
}

.progress-pagination > span.is-active::before {
  animation: progress-pagination-fill var(--progress-pagination-duration, 4s) linear both;
}

.progress-pagination.is-paused > span::before { animation-play-state: paused; }

@keyframes progress-pagination-fill {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@media (prefers-reduced-motion: reduce) {
  .progress-pagination > span.is-active::before {
    animation: none;
    transform: scaleX(1);
  }
}

/* Interactive presentation retains the same line geometry with a larger target. */
.progress-pagination > button {
  position: relative;
  display: block;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-size: 0;
  cursor: pointer;
}
.progress-pagination:has(> button) { height: 40px; }
.progress-pagination > button::after,
.progress-pagination > button::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 100%;
  border-top: 2px solid var(--progress-pagination-track, var(--theme-divider, #d3d3d1));
}
.progress-pagination > button::before {
  z-index: 1;
  border-color: var(--progress-pagination-accent, var(--color-accent, #fa4d7e));
  transform: scaleX(0);
  transform-origin: left;
}
.progress-pagination > button[aria-current="true"]::after {
  border-color: color-mix(in srgb, var(--progress-pagination-accent, var(--color-accent, #fa4d7e)) 45%, var(--progress-pagination-track, var(--theme-divider, #d3d3d1)));
}
.progress-pagination > button.is-active::before {
  animation: progress-pagination-fill var(--progress-pagination-duration, 4s) linear both;
}
.progress-pagination.is-paused > button::before { animation-play-state: paused; }
.progress-pagination > button:focus-visible { outline: 2px solid var(--color-focus, #dd3353); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  .progress-pagination > button.is-active::before { animation: none; transform: scaleX(1); }
}