.product-cycle-stack {
  position: fixed;
  right: -8px;
  top: 56%;
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transform: translateY(-50%);
  pointer-events: none;
}

.product-cycle-stack-tab {
  position: relative;
  width: 50px;
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: #2b2b2b;
  box-sizing: border-box;
  pointer-events: auto;
  -webkit-tap-highlight-color: transparent;
  isolation: isolate;
  transform: none;
  transition: transform .18s ease;
}

.product-cycle-stack-tab::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgb(198 232 249 / 38%);
  border-right: 0;
  border-radius: inherit;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.14);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  pointer-events: none;
  transition: background-color .18s ease, box-shadow .18s ease;
}

.product-cycle-stack-next, .product-cycle-stack-prev {
  border-radius: 16px 0 0 16px;
}

.product-cycle-stack-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 88px;
  padding: 10px 6px;
  box-sizing: border-box;
}

.product-cycle-stack-label {
  display: none;
}

.product-cycle-stack-arrow {
  display: block;
  font-size: 44px;
  line-height: 1;
  font-weight: 400;
  color: rgba(70, 70, 70, 0.88);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.28);
}

.product-cycle-stack-next .product-cycle-stack-inner::before, .product-cycle-stack-prev .product-cycle-stack-inner::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 4px;
  border-radius: 4px;
}

.product-cycle-stack-next .product-cycle-stack-inner::before {
  background: #b20000;
}

.product-cycle-stack-prev .product-cycle-stack-inner::before {
  background: #b20000;
}

.product-cycle-stack-tab:hover, .product-cycle-stack-tab:focus-visible {
  transform: translateX(-8px);
  outline: 0;
}

.product-cycle-stack-tab:hover::before, .product-cycle-stack-tab:focus-visible::before {
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.18);
}

.product-cycle-stack-tab:active {
  transform: translateX(-4px);
}

.product-cycle-stack-tab::after {
  position: absolute;
  top: 50%;
  right: calc(100% + 10px);
  z-index: 2;
  min-width: 180px;
  max-width: 300px;
  padding: 11px 13px;
  border: 2px solid rgba(58, 127, 255, 0.38);
  border-radius: 12px;
  background: rgb(198 232 249 / 38%);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.14);
  box-sizing: border-box;
  content: attr(data-product-name);
  font-size: 18px;
  line-height: 1.25;
  font-weight: 400;
  color: #2a2a2a;
  text-align: right;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-50%) translateX(-8px);
  transition: opacity .18s ease, visibility .18s ease, transform .18s ease;
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.product-cycle-stack-tab:hover::after, .product-cycle-stack-tab:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

@media (hover: none) {
  .product-cycle-stack-tab::after {
    display: none;
  }
}

@media (max-device-width: 1024px) {
  .product-cycle-stack {
    right: -8px;
    top: 58%;
    gap: 9px;
  }

  .product-cycle-stack-tab {
    width: 68px;
    min-height: 92px;
  }

  .product-cycle-stack-inner {
    min-height: 92px;
  }

  .product-cycle-stack-arrow {
    font-size: 46px;
  }
}

@media (max-device-width: 440px) {
  .product-cycle-stack {
    right: -8px;
    top: 59%;
    gap: 8px;
  }

  .product-cycle-stack-next, .product-cycle-stack-prev {
    border-radius: 15px 0 0 15px;
  }

  .product-cycle-stack-tab {
    width: 70px;
    min-height: 96px;
  }

  .product-cycle-stack-inner {
    min-height: 96px;
    padding: 11px 6px;
  }

  .product-cycle-stack-arrow {
    font-size: 47px;
  }
}