/* Интерактивные этапы (#etapy) */
.steps-section {
  overflow: hidden;
}

.steps-interactive {
  max-width: 42rem;
  margin: 0 auto;
  position: relative;
  padding-left: 0.25rem;
}

.steps-interactive::before {
  content: "";
  position: absolute;
  left: 1.35rem;
  top: 2.25rem;
  bottom: 2.25rem;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--color-terracotta) 0%,
    rgba(196, 112, 90, 0.35) 45%,
    var(--color-plaster) 100%
  );
  border-radius: 2px;
  pointer-events: none;
}

.steps-interactive__item {
  position: relative;
  margin-bottom: 0.65rem;
  opacity: 0;
  animation: steps-item-in 0.55s ease forwards;
}

.steps-interactive__item:nth-child(1) {
  animation-delay: 0.06s;
}

.steps-interactive__item:nth-child(2) {
  animation-delay: 0.14s;
}

.steps-interactive__item:nth-child(3) {
  animation-delay: 0.22s;
}

@keyframes steps-item-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.steps-interactive__item:last-child {
  margin-bottom: 0;
}

.steps-interactive__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 2.75rem 1fr auto;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 1rem 1.1rem 1rem 0.35rem;
  margin: 0;
  border: none;
  background: transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
  color: var(--color-charcoal-warm);
  border-radius: var(--radius);
  transition:
    background 0.25s ease,
    transform 0.25s ease;
  -webkit-tap-highlight-color: transparent;
}

.steps-interactive__trigger:hover {
  background: rgba(255, 255, 255, 0.45);
}

.steps-interactive__trigger:focus-visible {
  outline: 2px solid var(--color-terracotta);
  outline-offset: 2px;
}

.steps-interactive__item.is-open .steps-interactive__trigger {
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-soft);
}

.steps-interactive__num {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  background: var(--color-white);
  color: var(--color-greige);
  border: 2px solid var(--color-plaster);
  transition:
    border-color 0.35s ease,
    background 0.35s ease,
    color 0.35s ease,
    transform 0.35s cubic-bezier(0.34, 1.2, 0.64, 1),
    box-shadow 0.35s ease;
  position: relative;
  z-index: 1;
}

.steps-interactive__item.is-open .steps-interactive__num {
  background: var(--color-terracotta);
  border-color: var(--color-terracotta);
  color: var(--color-white);
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(196, 112, 90, 0.35);
}

.steps-interactive__head {
  font-weight: 800;
  font-size: clamp(1.05rem, 2.5vw, 1.2rem);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.steps-interactive__chev {
  width: 0.5rem;
  height: 0.5rem;
  border-right: 2px solid var(--color-mist);
  border-bottom: 2px solid var(--color-mist);
  transform: rotate(45deg);
  transition: transform 0.4s cubic-bezier(0.34, 1.2, 0.64, 1);
  flex-shrink: 0;
  margin-right: 0.25rem;
}

.steps-interactive__item.is-open .steps-interactive__chev {
  transform: rotate(-135deg);
  border-color: var(--color-terracotta);
}

.steps-interactive__panel-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.steps-interactive__item.is-open .steps-interactive__panel-wrap {
  grid-template-rows: 1fr;
}

.steps-interactive__panel-inner {
  overflow: hidden;
  min-height: 0;
}

.steps-interactive__panel {
  padding: 0 0 1.15rem 3.85rem;
  margin: 0;
  color: var(--color-greige);
  font-size: 0.95rem;
  line-height: 1.62;
  opacity: 0;
  transform: translateY(-6px);
  transition:
    opacity 0.4s ease 0.08s,
    transform 0.45s cubic-bezier(0.34, 1.2, 0.64, 1) 0.06s;
}

.steps-interactive__item.is-open .steps-interactive__panel {
  opacity: 1;
  transform: translateY(0);
}

.steps-interactive__item:not(.is-open) .steps-interactive__panel {
  pointer-events: none;
}

.steps-section__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  justify-content: center;
  margin-top: 2rem;
  padding-top: 0.25rem;
}

@media (max-width: 520px) {
  .steps-interactive::before {
    left: 1.2rem;
  }

  .steps-interactive__trigger {
    grid-template-columns: 2.5rem 1fr auto;
    padding-right: 0.5rem;
  }

  .steps-interactive__num {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 0.95rem;
  }

  .steps-interactive__panel {
    padding-left: 3.35rem;
    padding-top: 0.35rem;
  }

  .steps-interactive__item.is-open .steps-interactive__trigger {
    grid-template-columns: 2.5rem 1fr auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .steps-interactive__item {
    animation: none;
    opacity: 1;
  }

  .steps-interactive__trigger,
  .steps-interactive__num,
  .steps-interactive__chev,
  .steps-interactive__panel-wrap,
  .steps-interactive__panel {
    transition: none;
  }

  .steps-interactive__item.is-open .steps-interactive__num {
    transform: none;
  }

  .steps-interactive__item.is-open .steps-interactive__panel {
    transform: none;
  }
}