/* reading-progress.css — прогрес читання + кнопка «нагору». Парний до reading-progress.js. */

.iprm-reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 9995;
  background: transparent;
  pointer-events: none;
}

.iprm-reading-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--iprm-accent, #7055a4), var(--apple-purple-mid, #9b59b6));
  transition: width 0.1s linear;
}

.iprm-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--iprm-accent, #7055a4);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, background 0.15s;
}

.iprm-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.iprm-to-top:hover {
  background: var(--iprm-accent-hover, #5d4691);
}

.iprm-to-top:focus-visible {
  outline: 2px solid var(--iprm-accent, #7055a4);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .iprm-to-top { transition: opacity 0.2s ease; transform: none; }
  .iprm-reading-progress span { transition: none; }
}