:root {
  --nav-ink: #122840;
  --nav-navy: #102b49;
  --nav-blue: #1769aa;
  --nav-cyan: #38b7ce;
  --nav-line: #dce5ed;
  --nav-shadow: 0 16px 42px rgba(16, 43, 73, .14);
  --nav-radius: 8px;
}

heat-tech-navbar {
  position: sticky;
  top: 0;
  z-index: 1200;
  display: block;
}

.site-header { position: relative; z-index: 1200; }
.site-topbar { background: var(--nav-navy); color: #e8f1f7; }
.site-topbar__inner {
  display: flex;
  max-width: 1280px;
  min-height: 38px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 0 auto;
  padding: 5px 28px;
  font: 500 11px/1.35 "Montserrat", "Segoe UI", Arial, sans-serif;
}
.site-topbar__contact, .site-topbar__details, .site-social {
  display: flex;
  align-items: center;
}
.site-topbar__contact { gap: 11px; }
.site-topbar__contact > span { width: 1px; height: 13px; background: rgba(255,255,255,.35); }
.site-topbar a { color: #f3f8fc; text-decoration: none; }
.site-topbar a:hover { color: #8fe6f2; }
.site-topbar__details { gap: 18px; }
.site-social { gap: 7px; }
.site-social a {
  display: grid;
  width: 23px;
  height: 23px;
  place-items: center;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 50%;
  font: 700 10px/1 Arial, sans-serif;
}

.site-nav-shell {
  position: relative;
  z-index: 1200;
  border-bottom: 1px solid rgba(16, 43, 73, .07);
  background: rgba(255,255,255,.98);
  box-shadow: 0 5px 22px rgba(16,43,73,.08);
}
.site-nav {
  position: relative;
  display: flex;
  max-width: 1280px;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
  padding: 10px 28px;
  font-family: "Montserrat", "Segoe UI", Arial, sans-serif;
}
.site-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
  color: var(--nav-navy);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}
.site-brand:hover, .site-brand[aria-current="page"] { color: var(--nav-navy); }
.site-brand img {
  display: block;
  width: 52px;
  height: 52px;
  object-fit: contain;
}
.site-nav__panel { margin-left: auto; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 3px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav__list > li { position: relative; }
.site-nav__link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border-radius: var(--nav-radius);
  color: var(--nav-ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.25;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s ease, background-color .18s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link.is-current,
.site-products.is-current > .site-products__heading .site-nav__link {
  background: #eef5fa;
  color: var(--nav-blue);
}
.site-nav__link:focus-visible,
.site-products__toggle:focus-visible,
.site-nav__toggle:focus-visible,
.site-nav__cta:focus-visible,
.site-mega-menu__link:focus-visible {
  outline: 3px solid rgba(56,183,206,.55);
  outline-offset: 2px;
}
.site-products { position: static; }
.site-products__heading { display: flex; align-items: center; }
.site-products__toggle {
  display: grid;
  width: 30px;
  height: 36px;
  flex: 0 0 auto;
  place-items: center;
  margin-left: -9px;
  padding: 0;
  border: 0;
  border-radius: var(--nav-radius);
  background: transparent;
  color: var(--nav-blue);
  cursor: pointer;
  transition: background-color .18s ease, color .18s ease;
}
.site-products__toggle:hover { background: #eef5fa; color: var(--nav-navy); }
.site-products__toggle svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
  transition: transform .18s ease;
}
.site-products.is-open .site-products__toggle svg { transform: rotate(180deg); }
.site-mega-menu {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: 1210;
  width: min(640px, calc(100vw - 32px));
  max-height: calc(100vh - 130px);
  max-height: calc(100dvh - 130px);
  overflow-y: auto;
  padding: 19px;
  border: 1px solid var(--nav-line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--nav-shadow);
  opacity: 0;
  pointer-events: none;
  transform: none;
  transition: opacity .18s ease, visibility .18s ease;
  visibility: hidden;
}
.site-products.is-open .site-mega-menu {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}
.site-mega-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 0 12px;
  padding: 0 2px 12px;
  border-bottom: 1px solid var(--nav-line);
  color: var(--nav-navy);
  font-size: 12px;
  font-weight: 800;
}
.site-mega-menu__header > a {
  color: var(--nav-blue);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
}
.site-mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 10px;
}
.site-mega-menu__link {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  color: var(--nav-ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  text-decoration: none;
  transition: color .18s ease, background-color .18s ease;
}
.site-mega-menu__link > span:last-child { color: var(--nav-cyan); opacity: 0; transition: opacity .18s ease; }
.site-mega-menu__link:hover,
.site-mega-menu__link:focus-visible,
.site-mega-menu__link.is-current { background: #eef5fa; color: var(--nav-blue); }
.site-mega-menu__link:hover > span:last-child,
.site-mega-menu__link:focus-visible > span:last-child { opacity: 1; }
.site-nav__cta-item { margin-left: 9px; }
.site-nav__cta {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 10px 15px;
  border: 1px solid var(--nav-blue);
  border-radius: var(--nav-radius);
  background: var(--nav-blue);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.site-nav__cta:hover { transform: translateY(-1px); border-color: var(--nav-navy); background: var(--nav-navy); color: #fff; box-shadow: 0 6px 16px rgba(16,43,73,.18); }
.site-nav__toggle { display: none; }
.site-nav button:hover { transform: none; box-shadow: none; }

@media (max-width: 1023.98px) {
  .site-nav { min-height: 72px; padding: 9px 22px; }
  .site-brand img { width: 49px; height: 49px; }
  .site-nav__toggle {
    display: flex;
    width: 43px;
    height: 42px;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0;
    border: 1px solid var(--nav-line);
    border-radius: var(--nav-radius);
    background: #fff;
    color: var(--nav-navy);
    cursor: pointer;
  }
  .site-nav__toggle span { display: block; width: 18px; height: 2px; border-radius: 2px; background: currentColor; transition: transform .18s ease, opacity .18s ease; }
  .site-nav.is-menu-open .site-nav__toggle span:first-child { transform: translateY(7px) rotate(45deg); }
  .site-nav.is-menu-open .site-nav__toggle span:nth-child(2) { opacity: 0; }
  .site-nav.is-menu-open .site-nav__toggle span:last-child { transform: translateY(-7px) rotate(-45deg); }
  .site-nav__panel {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100vh - 110px);
    max-height: calc(100dvh - 110px);
    margin: 0;
    overflow: auto;
    padding: 12px 22px 18px;
    border-top: 1px solid var(--nav-line);
    background: #fff;
    box-shadow: var(--nav-shadow);
  }
  .site-nav.is-menu-open .site-nav__panel { display: block; }
  .site-nav__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
    gap: 3px 8px;
  }
  .site-nav__list > li { min-width: 0; }
  .site-nav__link { width: 100%; justify-content: flex-start; padding: 11px 12px; }
  .site-products { grid-column: 1 / -1; }
  .site-products__heading { width: 100%; }
  .site-products__heading > .site-nav__link { flex: 1 1 auto; }
  .site-products__toggle { width: 42px; height: 42px; margin: 0; border: 1px solid var(--nav-line); }
  .site-mega-menu {
    position: static;
    width: 100%;
    max-height: 0;
    margin-top: 3px;
    overflow: hidden;
    padding: 0 10px;
    border-color: transparent;
    border-radius: var(--nav-radius);
    box-shadow: none;
    opacity: 1;
    pointer-events: none;
    transform: none;
    transition: max-height .22s ease, padding .22s ease, border-color .22s ease, visibility 0s linear .22s;
    visibility: hidden;
  }
  .site-products.is-open .site-mega-menu {
    max-height: min(56vh, 430px);
    max-height: min(56dvh, 430px);
    overflow-y: auto;
    padding: 12px 10px;
    border-color: var(--nav-line);
    pointer-events: auto;
    transition-delay: 0s;
    visibility: visible;
  }
  .site-mega-menu__header { padding-bottom: 9px; }
  .site-mega-menu__grid { gap: 2px 6px; }
  .site-mega-menu__link { min-height: 44px; }
  .site-nav__cta-item { grid-column: 1 / -1; margin: 7px 0 0; }
  .site-nav__cta { width: 100%; min-height: 46px; font-size: 13px; }
}

@media (max-width: 640px) {
  .site-topbar__inner { min-height: 34px; padding: 5px 16px; font-size: 10px; }
  .site-topbar__details { display: none; }
  .site-topbar__contact { justify-content: center; width: 100%; gap: 9px; }
  .site-nav { min-height: 68px; padding: 8px 16px; }
  .site-brand { gap: 9px; font-size: 14px; }
  .site-brand img { width: 46px; height: 46px; }
  .site-nav__panel {
    max-height: calc(100vh - 102px);
    max-height: calc(100dvh - 102px);
    padding: 10px 16px 16px;
  }
}

@media (max-width: 420px) {
  .site-topbar__inner { font-size: 9px; }
  .site-nav__list { grid-template-columns: 1fr; }
  .site-products { grid-column: auto; }
  .site-mega-menu__grid { grid-template-columns: 1fr; }
  .site-products.is-open .site-mega-menu { max-height: 42vh; }
  .site-nav__cta-item { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .site-nav *,
  .site-nav *::before,
  .site-nav *::after,
  .site-topbar * {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}