body#product #header {
  box-shadow: none !important;
}

.product-nav-wrapper {
  position: relative;
  margin-top: 48px;
}

.pnav-sticky {
  position: sticky;
  top: var(--pnav-top, 128px);
  z-index: 999;
  margin-bottom: 24px;
  will-change: top;
  transition: top 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.pnav-sticky::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100vw - 16px);
  height: 100%;
  background: #ffffff;
  z-index: -1;
  border-top: 1px solid #ebebeb;
  border-bottom: 1px solid #ebebeb;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
@media (max-width: 576px) {
  .pnav-sticky::before {
    width: 100vw;
  }
}

.pnav-sticky.is-stuck::before {
  box-shadow: 0 7px 12px rgba(0, 0, 0, 0.07);
  border-bottom-color: transparent;
}

.pnav-inner {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 0;
}

.pnav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  gap: 12px;
}

.pnav-list::-webkit-scrollbar {
  display: none;
}

.pnav-item {
  flex-shrink: 0;
  display: flex;
}

.pnav-link {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 500;
  color: #555555;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.pnav-link:hover {
  color: #1a1a1a;
  text-decoration: none;
}

.pnav-link::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 0;
  width: 100%;
  height: 3px;
  background: #c8c8c8;
  border-radius: 3px 3px 0 0;
  transform: scaleX(0);
  transition: transform 0.3s ease-out;
}

.pnav-link:not(.pnav-link--active):hover::after {
  transform: scaleX(1);
}

.pnav-link--active {
  color: #1a1a1a;
  font-weight: 700;
}

.pnav-link--active::after {
  background: #1a1a1a;
  transform: scaleX(1);
}

.pnav-section + .pnav-section {
  margin-top: 32px;
}

.pnav-section-title {
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
  margin-bottom: 16px;
  color: #1a1a1a;
}

.pnav-content--collapsed {
  position: relative;
  max-height: var(--pnav-max-height, 250px);
  overflow: hidden;
}

.pnav-content--collapsed::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.85) 40%,
    #ffffff 65%,
    #ffffff 100%
  );
  pointer-events: none;
}

.pnav-content--animated {
  transition: max-height 0.5s ease;
}

.pnav-content--expanded {
  padding-bottom: 24px;
}

.pnav-content--expanded::after {
  display: none;
}

.pnav-read-more-wrapper {
  text-align: center;
  position: relative;
  margin-top: -24px;
  z-index: 2;
}

.pnav-read-more-wrapper::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: #f0f0f0;
  z-index: -1;
}

.pnav-read-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 32px;
  background: #ffffff;
  border: 1px solid #e0e0e0;
  border-radius: 40px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: #1a1a1a;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pnav-read-more:hover {
  border-color: #d0d0d0;
  background: #fafafa;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.pnav-read-more:focus-visible {
  outline: 2px solid #1a1a1a;
  outline-offset: 2px;
}

.pnav-read-more__icon {
  display: inline-block;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

@media (max-width: 767px) {
  .pnav-link {
    padding: 14px 16px;
    font-size: 13px;
  }

  .pnav-section {
    padding: 16px 0 32px;
  }

  .pnav-sticky {
    border-radius: 0;
  }

  .pnav-read-more {
    width: 90%;
    padding: 12px 24px;
  }
}