.xeron-site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2600;
  width: 100%;
  height: 88px;
  padding: 0;
  pointer-events: auto;
  border: 0;
  border-bottom: 1px solid rgba(255,255,255,.105);
  background:
    radial-gradient(circle at 0% 50%, rgba(40,217,255,.16), transparent 28%),
    radial-gradient(circle at 100% 50%, rgba(255,62,209,.15), transparent 30%),
    linear-gradient(180deg, rgba(5,7,18,.92), rgba(5,7,18,.70));
  box-shadow:
    0 18px 60px rgba(0,0,0,.26),
    inset 0 1px 0 rgba(255,255,255,.045);
  backdrop-filter: blur(18px) saturate(1.15);
  -webkit-backdrop-filter: blur(18px) saturate(1.15);
  transform: translateY(0);
  transition:
    transform .28s ease,
    background .22s ease,
    box-shadow .22s ease,
    border-color .22s ease;
}

.xeron-site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(40,217,255,.28),
    rgba(255,62,209,.22),
    transparent
  );
  pointer-events: none;
}

.xeron-site-header.is-scrolled,
body.xeron-page-scrolled .xeron-site-header {
  background:
    radial-gradient(circle at 0% 50%, rgba(40,217,255,.12), transparent 28%),
    radial-gradient(circle at 100% 50%, rgba(255,62,209,.12), transparent 30%),
    linear-gradient(180deg, rgba(5,7,18,.96), rgba(5,7,18,.86));
  box-shadow:
    0 22px 70px rgba(0,0,0,.36),
    inset 0 1px 0 rgba(255,255,255,.045);
}

.xeron-site-header.is-hidden,
body.xeron-header-hidden .xeron-site-header {
  transform: translateY(-104px);
}

/* ---------- Header inner: centered content, no capsule background ---------- */

.xeron-site-header__inner {
  width: min(1440px, calc(100% - 96px));
  height: 88px;
  margin: 0 auto;
  padding: 0;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(22px, 2.4vw, 46px);
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

/* ---------- Logo ---------- */

.xeron-site-logo {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  justify-self: start;
}

.xeron-site-logo__img {
  width: 172px;
  max-width: 172px;
  max-height: 42px;
  object-fit: contain;
  display: block;
}

/* ---------- Primary navigation ---------- */

.xeron-site-nav {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(22px, 2.15vw, 40px);
  min-width: 0;
}

.xeron-site-nav__item {
  position: relative;
  height: 88px;
  display: flex;
  align-items: center;
}

.xeron-site-nav__item > a {
  position: relative;
  height: 88px;
  display: inline-flex;
  align-items: center;
  padding: 0 5px;
  color: rgba(255,255,255,.68);
  font-size: 13px;
  line-height: 1;
  font-weight: 950;
  letter-spacing: .01em;
  white-space: nowrap;
  text-decoration: none;
  transition:
    color .18s ease,
    opacity .18s ease;
}

.xeron-site-nav__item > a::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  bottom: 25px;
  height: 2px;
  border-radius: 999px;
  background: transparent;
  transition: background .18s ease;
}

.xeron-site-nav__item:hover > a,
.xeron-site-nav__item.is-active > a {
  color: #fff;
}

.xeron-site-nav__item:hover > a::after,
.xeron-site-nav__item.is-active > a::after {
  background: linear-gradient(90deg, #28d9ff, #ff3ed1);
}

/* ---------- Dropdown bridge ---------- */

.xeron-site-nav__item--has-menu::after,
.xeron-nav-item--has-menu::after {
  content: "";
  position: absolute;
  left: -44px;
  right: -44px;
  top: 100%;
  height: 28px;
  pointer-events: auto;
}

/* ---------- Dropdown menu ---------- */

.xeron-site-dropdown {
  position: absolute;
  left: 50%;
  top: calc(100% + 14px);
  width: min(780px, 92vw);
  transform: translateX(-50%) translateY(12px);
  z-index: 2800;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity .18s ease,
    visibility .18s ease,
    transform .18s ease;
}

.xeron-site-nav__item:hover .xeron-site-dropdown,
.xeron-site-nav__item:focus-within .xeron-site-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.xeron-site-dropdown__grid {
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,.14);
  background:
    radial-gradient(circle at 0% 0%, rgba(40,217,255,.14), transparent 34%),
    radial-gradient(circle at 100% 100%, rgba(255,62,209,.15), transparent 38%),
    rgba(9,10,25,.92);
  box-shadow:
    0 34px 110px rgba(0,0,0,.46),
    inset 0 1px 0 rgba(255,255,255,.07);
  backdrop-filter: blur(22px) saturate(1.18);
  -webkit-backdrop-filter: blur(22px) saturate(1.18);
}

.xeron-site-dropdown__card {
  min-height: 126px;
  padding: 22px;
  display: block;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.12);
  background:
    radial-gradient(circle at 100% 0%, rgba(255,255,255,.052), transparent 42%),
    rgba(255,255,255,.045);
  color: inherit;
  text-decoration: none;
  transition:
    transform .18s ease,
    border-color .18s ease,
    background .18s ease;
}

.xeron-site-dropdown__card span {
  display: block;
  margin-bottom: 10px;
  color: #28d9ff;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: 11px;
  line-height: 1;
  font-weight: 950;
}

.xeron-site-dropdown__card strong {
  display: block;
  color: #fff;
  font-size: 24px;
  line-height: 1.05;
  letter-spacing: -.04em;
  font-weight: 950;
}

.xeron-site-dropdown__card em {
  display: block;
  max-width: 92%;
  margin-top: 10px;
  color: rgba(201,210,236,.74);
  font-size: 13px;
  line-height: 1.42;
  font-style: normal;
}

.xeron-site-dropdown__card:hover {
  transform: translateY(-3px);
  border-color: rgba(40,217,255,.32);
  background:
    radial-gradient(circle at 0% 0%, rgba(40,217,255,.11), transparent 38%),
    radial-gradient(circle at 100% 100%, rgba(255,62,209,.11), transparent 38%),
    rgba(255,255,255,.066);
}

/* ---------- Actions ---------- */

.xeron-site-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  justify-self: end;
}

.xeron-site-icon-btn,
.xeron-site-lang__btn {
  height: 48px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.14);
  background:
    radial-gradient(circle at 30% 0%, rgba(255,255,255,.08), transparent 44%),
    rgba(255,255,255,.058);
  color: #fff;
  cursor: pointer;
  transition:
    border-color .18s ease,
    background .18s ease,
    transform .18s ease;
}

.xeron-site-icon-btn {
  width: 48px;
  min-width: 48px;
  display: grid;
  place-items: center;
  padding: 0;
}

.xeron-site-icon-btn svg {
  width: 19px;
  height: 19px;
  fill: currentColor;
}

.xeron-site-icon-btn:hover,
.xeron-site-lang:hover .xeron-site-lang__btn,
.xeron-site-lang.is-open .xeron-site-lang__btn {
  border-color: rgba(40,217,255,.36);
  background:
    radial-gradient(circle at 30% 0%, rgba(40,217,255,.14), transparent 44%),
    rgba(255,255,255,.09);
}

.xeron-site-lang {
  position: relative;
}

.xeron-site-lang__btn {
  min-width: 76px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  line-height: 1;
  font-weight: 950;
}

.xeron-site-lang__btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.xeron-site-lang::after {
  content: "";
  position: absolute;
  left: -14px;
  right: -14px;
  top: 100%;
  height: 16px;
  pointer-events: auto;
}

.xeron-site-lang__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 14px);
  width: 162px;
  padding: 8px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.14);
  background:
    radial-gradient(circle at 0% 0%, rgba(40,217,255,.12), transparent 34%),
    radial-gradient(circle at 100% 100%, rgba(255,62,209,.12), transparent 36%),
    rgba(8,10,24,.94);
  box-shadow: 0 24px 70px rgba(0,0,0,.34);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity .18s ease,
    visibility .18s ease,
    transform .18s ease;
}

.xeron-site-lang:hover .xeron-site-lang__menu,
.xeron-site-lang:focus-within .xeron-site-lang__menu,
.xeron-site-lang.is-open .xeron-site-lang__menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.xeron-site-lang__menu a {
  display: block;
  padding: 11px 12px;
  border-radius: 12px;
  color: rgba(255,255,255,.70);
  font-size: 13px;
  font-weight: 850;
  text-decoration: none;
}

.xeron-site-lang__menu a:hover,
.xeron-site-lang__menu a.is-active {
  color: #fff;
  background:
    radial-gradient(circle at 100% 0%, rgba(40,217,255,.12), transparent 42%),
    rgba(255,255,255,.065);
}

.xeron-site-buy {
  min-height: 48px;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #fff;
  color: #04050b;
  font-size: 14px;
  line-height: 1;
  font-weight: 950;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 12px 32px rgba(0,0,0,.18);
  transition:
    transform .18s ease,
    box-shadow .18s ease;
}

.xeron-site-buy:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 42px rgba(0,0,0,.24);
}

/* ---------- Mobile button ---------- */

.xeron-site-menu-btn {
  display: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.060);
  cursor: pointer;
  place-items: center;
}

.xeron-site-menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 3px 0;
  border-radius: 999px;
  background: #fff;
}

/* ---------- Overlays ---------- */

.xeron-mobile-drawer,
.xeron-search-overlay {
  z-index: 3200;
}

.xeron-search-overlay__box,
.xeron-mobile-drawer__panel {
  background:
    radial-gradient(circle at 0% 0%, rgba(40,217,255,.14), transparent 34%),
    radial-gradient(circle at 100% 100%, rgba(255,62,209,.14), transparent 38%),
    rgba(8,10,24,.96);
  border-color: rgba(255,255,255,.14);
}

/* ---------- Product detail anchor nav relationship ---------- */

.xeron-pd-tabs.is-fixed {
  z-index: 2400;
}

body:not(.xeron-header-hidden) .xeron-pd-tabs.is-fixed {
  top: 88px;
}

body.xeron-header-hidden .xeron-pd-tabs.is-fixed {
  top: 0;
}

/* ---------- Prevent top black gap caused by old detail header spacing ---------- */

.xeron-pd-hero,
.xeron-pd-hero__inner {
  min-height: 100svh;
}

.xeron-pd-gallery,
.xeron-pd-info--carded {
  min-height: 100svh;
}

/* ---------- Responsive ---------- */

@media (max-width: 1180px) {
  .xeron-site-header__inner {
    width: calc(100% - 48px);
    grid-template-columns: 176px minmax(0, 1fr) auto;
    gap: 18px;
  }

  .xeron-site-logo__img {
    width: 140px;
    max-width: 140px;
  }

  .xeron-site-nav {
    gap: 14px;
  }

  .xeron-site-nav__item > a {
    font-size: 12px;
  }

  .xeron-site-buy {
    padding: 0 18px;
  }
}

@media (max-width: 980px) {
  .xeron-site-header {
    height: 72px;
  }

  .xeron-site-header__inner {
    width: calc(100% - 28px);
    height: 72px;
    grid-template-columns: auto 1fr auto;
  }

  .xeron-site-logo__img {
    width: 132px;
    max-width: 132px;
  }

  .xeron-site-nav,
  .xeron-site-actions .xeron-site-icon-btn,
  .xeron-site-lang,
  .xeron-site-buy {
    display: none;
  }

  .xeron-site-menu-btn {
    display: grid;
  }

  body:not(.xeron-header-hidden) .xeron-pd-tabs.is-fixed {
    top: 72px;
  }
}

@media (max-width: 720px) {
  .xeron-site-header {
    height: 66px;
  }

  .xeron-site-header__inner {
    width: calc(100% - 20px);
    height: 66px;
  }

  .xeron-site-logo__img {
    width: 120px;
    max-width: 120px;
  }

  body:not(.xeron-header-hidden) .xeron-pd-tabs.is-fixed {
    top: 66px;
  }
}