.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.navbar {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
}

.brand__logo {
  height: 60px;
  width: auto;
  flex-shrink: 0;
}

.menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.menu > li {
  position: relative;
}

.menu__item {
  border: 0;
  background: transparent;
  color: var(--color-text);
  cursor: default;
  font-size: 1rem;
}

.menu__item--root-link {
  text-decoration: none;
  cursor: pointer;
}

.menu__dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.menu__dropdown-trigger::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid var(--color-primary);
  border-bottom: 1.5px solid var(--color-primary);
  transform: rotate(45deg) translateY(-1px);
}

.menu__dropdown.is-open .menu__dropdown-trigger::after {
  transform: rotate(-135deg) translateY(-1px);
}

.menu__dropdown:hover .menu__dropdown-trigger::after,
.menu__dropdown:focus-within .menu__dropdown-trigger::after {
  transform: rotate(-135deg) translateY(-1px);
}

.menu.menu--suppress-hover .menu__dropdown:hover .menu__dropdown-trigger::after,
.menu.menu--suppress-hover .menu__dropdown:focus-within .menu__dropdown-trigger::after {
  transform: rotate(45deg) translateY(-1px);
}

.menu__submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 210px;
  display: grid;
  gap: 4px;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

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

.menu.menu--suppress-hover .menu__dropdown:hover .menu__submenu,
.menu.menu--suppress-hover .menu__dropdown:focus-within .menu__submenu {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-4px);
}

#products-submenu {
  min-width: 320px;
}

#products-submenu > li > a {
  white-space: nowrap;
}

#services-submenu {
  min-width: 380px;
  max-height: 70vh;
  overflow-y: auto;
}

#services-submenu > li > a {
  white-space: nowrap;
}

.menu__submenu-accordion details {
  border: 1px solid #e1e6f0;
  border-radius: 10px;
  padding: 8px 10px;
  background: #fafbff;
}

.menu__submenu-accordion + .menu__submenu-accordion {
  margin-top: 6px;
}

.menu__submenu-accordion summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  position: relative;
  padding-right: 18px;
}

.menu__submenu-accordion summary::-webkit-details-marker {
  display: none;
}

.menu__submenu-accordion summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 0;
  font-size: 1rem;
  line-height: 1;
}

.menu__submenu-accordion details[open] summary::after {
  content: "-";
}

/* Category colours: 1=Performance (purple), 2=Safety (pink), 3=Data (blue) */
#services-submenu .menu__submenu-accordion:nth-child(1) details {
  border-color: #d7b4f3;
  background: linear-gradient(180deg, #faf0ff 0%, #f4e7fd 100%);
}
#services-submenu .menu__submenu-accordion:nth-child(1) summary {
  color: #560BAD;
}

#services-submenu .menu__submenu-accordion:nth-child(2) details {
  border-color: #FDBED9;
  background: linear-gradient(180deg, #FEF5F8 0%, #FEF0F5 100%);
}
#services-submenu .menu__submenu-accordion:nth-child(2) summary {
  color: #B31A62;
}

#services-submenu .menu__submenu-accordion:nth-child(3) details {
  border-color: #B3C2F8;
  background: linear-gradient(180deg, #F0F2FE 0%, #EEF1FE 100%);
}
#services-submenu .menu__submenu-accordion:nth-child(3) summary {
  color: #2D3F9E;
}

.menu__submenu-accordion p {
  margin-top: 6px;
  font-size: 0.78rem;
  line-height: 1.35;
}

.menu__submenu-service-list {
  margin-top: 8px;
  display: grid;
  gap: 2px;
}

.menu__submenu a {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.95rem;
}

.menu__submenu a:hover,
.menu__submenu a:focus-visible {
  background: #f4f6fb;
}

.menu__submenu-group {
  position: relative;
}

.menu__submenu-label {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.95rem;
}

.menu__submenu-label:hover,
.menu__submenu-label:focus-visible {
  background: #f4f6fb;
}

.menu__submenu-label--logo {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.95rem;
}

.menu__submenu-label--logo:hover,
.menu__submenu-label--logo:focus-visible {
  background: #f4f6fb;
}

.menu__submenu-label--logo img {
  display: block;
  width: auto;
  height: 24px;
  margin-left: 10px;
  margin-right: 8px;
}

#products-submenu .menu__submenu-label--logo img {
  height: 57px;
  transform: scale(1.25);
}

.menu__submenu-label--aw img {
  height: 48px;
}

.menu__submenu-label--has-children {
  position: relative;
  padding-right: 26px;
}

.menu__submenu-label--has-children::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 1.5px solid var(--color-primary);
  border-bottom: 1.5px solid var(--color-primary);
  box-sizing: border-box;
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%) rotate(-45deg);
}

.menu__submenu-group:hover > .menu__submenu-label--has-children::after,
.menu__submenu-group:focus-within > .menu__submenu-label--has-children::after {
  border-color: var(--color-primary);
}

.menu__submenu--nested {
  position: static;
  min-width: 0;
  margin-top: 4px;
  padding: 4px 0 0 10px;
  border: 0;
  box-shadow: none;
  background: transparent;
  display: none;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
}

.menu__submenu-group:hover > .menu__submenu--nested,
.menu__submenu-group:focus-within > .menu__submenu--nested {
  display: grid;
}

.menu__dropdown:hover #products-submenu .menu__submenu--nested,
.menu__dropdown:focus-within #products-submenu .menu__submenu--nested,
.menu__dropdown.is-open #products-submenu .menu__submenu--nested {
  display: grid;
}

.nav-actions {
  display: flex;
  gap: var(--space-2);
}

.menu-toggle {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}

.btn--primary {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary-dark);
}

.btn--primary:hover {
  background: #684892;
}

.chips {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.94rem;
}