/* Centrifugal pumps — sticky card stack */

.pump-centrifugal-area {
  padding-top: var(--_sizes---space--space-100);
  padding-bottom: var(--_sizes---space--space-40);
}

.pump-centrifugal {
  max-width: 1144px;
  margin-left: auto;
  margin-right: auto;
}

.pump-centrifugal-header {
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--_sizes---space--space-60);
}

.pump-centrifugal-header .heading-four {
  margin-top: 0;
  margin-bottom: var(--_sizes---space--space-16);
}

.pump-centrifugal-header-text {
  color: var(--gray--100);
  font-size: 17px;
  line-height: 1.65;
  margin: 0;
}

.pump-centrifugal-stack {
  position: relative;
  max-width: 1144px;
  margin-left: auto;
  margin-right: auto;
  /* Lets the last sticky card finish stacking before the section ends */
  padding-bottom: 6vh;
}

.pump-stack-card {
  position: sticky;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-column-gap: 54px;
  align-items: center;
  min-height: 480px;
  margin-bottom: 28vh;
  padding: 50px 48px;
  border-radius: 24px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.95) inset,
    0 2px 6px rgba(15, 23, 42, 0.05),
    0 14px 36px rgba(15, 23, 42, 0.1),
    0 28px 56px rgba(15, 23, 42, 0.08);
  transition:
    transform 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    box-shadow 0.5s ease,
    opacity 0.5s ease;
  will-change: transform;
}

.pump-stack-card:nth-child(1) {
  top: 88px;
  z-index: 10;
  background-color: #ffffff;
}

.pump-stack-card:nth-child(2) {
  top: 104px;
  z-index: 20;
  background-color: #f8f9fb;
}

.pump-stack-card:nth-child(3) {
  top: 120px;
  z-index: 30;
  background-color: #f3f5f8;
}

.pump-stack-card:nth-child(4) {
  top: 120px;
  z-index: 40;
  background-color: #eef1f5;
  /* Small runway so card 4 can fully stick on card 3 (not a huge gap below) */
  margin-bottom: 14vh;
}

.pump-stack-card.is-behind {
  transform: scale(0.975) translateY(-6px);
  opacity: 0.92;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.6) inset,
    0 8px 24px rgba(15, 23, 42, 0.06);
}

.pump-stack-card.is-active {
  transform: scale(1) translateY(0);
  opacity: 1;
  border-color: rgba(15, 23, 42, 0.14);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.9) inset,
    0 20px 48px rgba(15, 23, 42, 0.1);
}

.pump-stack-copy {
  min-width: 0;
}

.pump-stack-badge {
  display: inline-block;
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 16px;
  font-size: 12px;
  font-weight: 600;
  color: #2170b7;
  background: rgba(33, 112, 183, 0.08);
  border: 1px solid rgba(33, 112, 183, 0.12);
}

.pump-stack-title {
  color: var(--dark--100);
  font-family: var(--_font-family---heading-font);
  font-size: clamp(1.45rem, 2.2vw, 1.85rem);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 16px;
}

.pump-stack-text {
  color: var(--gray--100);
  font-size: 16px;
  line-height: 1.65;
  margin: 0 0 14px;
}

.pump-stack-text:last-child {
  margin-bottom: 0;
}

.pump-stack-visual {
  border-radius: 18px;
  background-color: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(15, 23, 42, 0.1);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  min-height: 380px;
  overflow: hidden;
  position: relative;
}

.pump-stack-image {
  width: 100%;
  height: 100%;
  min-height: 380px;
  object-fit: cover;
  display: block;
}

@media screen and (max-width: 991px) {
  .pump-stack-card {
    grid-template-columns: 1fr;
    grid-row-gap: 28px;
    min-height: 0;
    padding: 36px 28px;
    margin-bottom: 22vh;
    top: 72px !important;
  }

  .pump-stack-card:nth-child(2) {
    top: 84px !important;
  }

  .pump-stack-card:nth-child(3) {
    top: 96px !important;
  }

  .pump-stack-card:nth-child(4) {
    top: 96px !important;
    margin-bottom: 12vh;
  }

  .pump-stack-visual,
  .pump-stack-image {
    min-height: 280px;
  }
}

@media screen and (max-width: 767px) {
  .pump-stack-card {
    margin-bottom: 18vh;
    padding: 28px 22px;
  }

  .pump-stack-card.is-behind {
    transform: scale(0.99);
  }
}

@media (prefers-reduced-motion: reduce) {
  .pump-stack-card {
    transition: none;
  }

  .pump-stack-card.is-behind {
    transform: none;
    opacity: 1;
  }
}