/**
 * Site Header — Fixed navigation bar
 * Canonical nav: Logo | Products | Services | Industries | Partners | About | Contact | [Get a Quote]
 * Single-row layout: logo left, nav center, CTA right
 * Mobile: hamburger, CTA stays visible
 */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--color-bg);
  z-index: var(--layer-sticky);
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--duration-fast) var(--ease-precision),
              box-shadow var(--duration-fast) var(--ease-precision);
}

/* Scroll state — add via JS when scrolled */
.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: var(--header-height);
}

/* Logo */
.header__logo {
  flex-shrink: 0;
  display: block;
}

.header__logo img {
  height: 2.75rem;
  width: auto;
}

/* Navigation links */
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-3xs);
}

.header__nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  padding: var(--space-2xs) var(--space-xs);
  border-radius: var(--radius-md);
  transition: color var(--duration-fast) var(--ease-precision),
              background var(--duration-fast) var(--ease-precision);
  white-space: nowrap;
  text-decoration: none;
}

.header__nav-link:hover {
  color: var(--color-primary);
  background: var(--color-surface-2);
}

.header__nav-link--active {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

/* CTA button */
.header__cta {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-text-inverse);
  background: var(--e57-green);
  padding: var(--space-2xs) var(--space-md);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-precision);
}

.header__cta:hover {
  background: var(--e57-green-dark);
}

/* Mobile burger */
.header__burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 2.5rem;
  height: 2.5rem;
  position: relative;
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-precision);
}

.header__burger:hover {
  background: var(--color-surface-2);
}

.header__burger span {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--color-text);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  transition: all var(--duration-fast) var(--ease-precision);
}

.header__burger span::before,
.header__burger span::after {
  content: "";
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--color-text);
  position: absolute;
  left: 0;
  transition: all var(--duration-fast) var(--ease-precision);
}

.header__burger span::before { top: -6px; }
.header__burger span::after  { top: 6px; }

/* Burger open state */
.header__burger--open span { background: transparent; }
.header__burger--open span::before { top: 0; transform: rotate(45deg); }
.header__burger--open span::after  { top: 0; transform: rotate(-45deg); }

/* Mobile menu overlay */
.header__mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: var(--layer-drawer);
  padding: var(--space-md);
  flex-direction: column;
  gap: var(--space-3xs);
  overflow-y: auto;
  border-top: 1px solid var(--color-border-light);
}

.header__mobile-menu--open {
  display: flex;
}

.header__mobile-menu .header__nav-link {
  font-size: var(--text-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  width: 100%;
}

.header__mobile-menu .header__cta {
  margin-top: var(--space-sm);
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-md);
}

/* Right cluster: Portals dropdown + CTA */
.header__right-cluster {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

/* Portal dropdown */
.portal-dropdown { position: relative; }

.portal-dropdown__btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: #fff;
  padding: var(--space-2xs) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  background: var(--e57-blue-dark);
  transition: all var(--duration-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.portal-dropdown__btn:hover { background: var(--e57-blue); }

.portal-dropdown__menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 170px;
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--layer-dropdown);
  padding: var(--space-3xs) 0;
}

.portal-dropdown__menu.is-open { display: block; }

.portal-dropdown__link {
  display: block;
  padding: var(--space-2xs) var(--space-sm);
  font-size: var(--text-sm);
  color: var(--e57-blue-dark);
  font-weight: var(--font-medium);
  text-decoration: none;
}

.portal-dropdown__link:hover { background: var(--color-surface-2); }

/* ── Responsive ── */

@media (max-width: 1024px) {
  .header__nav { gap: var(--space-3xs); }
  .header__nav-link { font-size: var(--text-xs); padding: var(--space-2xs) var(--space-2xs); }
}

@media (max-width: 768px) {
  .header__burger { display: block; }
  .header__nav { display: none; }
  .header__right-cluster { display: none; }
}

/* Mobile menu portal section */
.header__mobile-portals {
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-2xs);
  margin-top: var(--space-2xs);
}

.header__mobile-portals-label {
  font-size: 9px;
  font-weight: var(--font-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-3xs) var(--space-md);
}