/* =============================================
   SITE HEADER & NAVIGATION
   ============================================= */

/* Entrance animation */
@keyframes nav-enter {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  border-bottom: 1px solid rgba(0, 33, 71, 0.08);
  transition: border-color 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  animation: nav-enter 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}


.site-header--scrolled {
  background-color: #ffffff;
  border-bottom: 1px solid rgba(0, 33, 71, 0.08);
}

.site-header.services-stack--active {
  background-color: #ffffff;
  border-bottom-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: var(--size-container-max);
  margin: 0 auto;
  padding: 18px 48px;
}

/* ---- Brand ---- */

.site-header__brand {
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__brand-logo {
  display: block;
  height: 60px;
  width: auto;
  object-fit: contain;
}

/* ---- Nav list ---- */

.site-nav {
  flex: 1;
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 300;
  line-height: 1.5;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  text-decoration: none;
  padding: 4px 0;
  position: relative;
  transition: color 0.2s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-dark-blue);
  transition: width 0.25s ease;
}

.site-nav__link:hover {
  color: var(--color-dark-blue);
}

.site-nav__link:hover::after {
  width: 100%;
}

.site-nav__link--active {
  font-weight: 700;
  color: var(--color-dark-blue);
  text-decoration: none;
}

.site-nav__link--active:not(.site-nav__link--dropdown)::after {
  width: 100%;
}

.site-nav__link--active:hover {
  color: var(--color-dark-blue);
}

.site-nav__link--no-pointer {
  cursor: default;
}

/* Dropdown chevron -overrides the underline pseudo-element; use ::before for the underline */
.site-nav__link--dropdown::after {
  content: '';
  position: static;
  display: inline-block;
  width: 5px;
  height: 5px;
  background-color: transparent;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  flex-shrink: 0;
  transition: none;
}

.site-nav__link--dropdown:hover::after {
  width: 5px;
}

.site-nav__link--dropdown::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-dark-blue);
  transition: width 0.25s ease;
}

.site-nav__link--dropdown:hover::before {
  width: 100%;
}

.site-nav__link--dropdown.site-nav__link--active::before {
  width: 100%;
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--color-dark-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

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

.site-nav__item {
  position: relative;
}

.site-nav__dropdown {
  position: absolute;
  top: 100%;
  left: -12px;
  min-width: 200px;
  background-color: #ffffff;
  border: 1px solid rgba(0, 33, 71, 0.08);
  border-radius: 2px;
  list-style: none;
  margin: 8px 0 0 0;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: 1000;
}

.site-nav__item:hover .site-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-nav__dropdown-item {
  margin: 0;
  padding: 0;
  position: relative;
}

.site-nav__dropdown-link {
  display: block;
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav__dropdown-link:hover {
  background-color: rgba(0, 33, 71, 0.05);
  color: var(--color-dark-blue);
}

.site-nav__dropdown-link[aria-current="page"] {
  font-weight: 700;
  color: var(--color-dark-blue);
  background-color: rgba(0, 33, 71, 0.05);
}

/* ---- Second level submenu ---- */

.site-nav__submenu {
  position: absolute;
  top: -1px;
  left: calc(100% + 8px);
  min-width: 250px;
  list-style: none;
  margin: 0;
  padding: 8px 0;
  background-color: #ffffff;
  border: 1px solid rgba(0, 33, 71, 0.08);
  border-radius: 2px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-4px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  z-index: 1001;
}

.site-nav__dropdown-item:hover .site-nav__submenu,
.site-nav__dropdown-item:focus-within .site-nav__submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.site-nav__submenu-item {
  margin: 0;
  padding: 0;
}

.site-nav__submenu-link {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav__submenu-link:hover,
.site-nav__submenu-link[aria-current="page"] {
  background-color: rgba(0, 33, 71, 0.05);
  color: var(--color-dark-blue);
}

/* ---- Actions (CTA + hamburger) ---- */

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
  flex-shrink: 0;
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  background-color: transparent;
  border: 1px solid rgba(0, 33, 71, 0.2);
  color: var(--color-dark-blue);
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 300;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.site-header__cta:hover {
  background-color: var(--color-dark-navy);
  border-color: var(--color-dark-navy);
  color: #ffffff;
}

.site-header__cta:focus-visible {
  outline: 2px solid var(--color-dark-blue);
  outline-offset: 3px;
}

/* ---- Hamburger toggle ---- */

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.site-header__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-dark-blue);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
  transform-origin: center;
}

/* Toggle open state */
.site-header--open .site-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header--open .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.site-header--open .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile CTA - hidden on desktop, shown only inside mobile drawer */
.site-nav__mobile-cta {
  display: none;
}

/* =============================================
   RESPONSIVE -MOBILE NAV
   ============================================= */

@media (max-width: 767px) {
  .site-header__inner {
    padding: 20px 20px;
    gap: 0;
  }

  .site-header__toggle {
    display: flex;
  }

  .site-header__cta {
    display: none;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-bottom: 1px solid rgba(0, 33, 71, 0.08);
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 20px;
  }

  .site-header--open .site-nav {
    max-height: 80vh;
    padding: 12px 20px 20px;
    overflow-y: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }

  .site-nav__item {
    width: 100%;
    border-bottom: 1px solid rgba(0, 33, 71, 0.06);
  }

  .site-nav__link--no-pointer {
    cursor: pointer;
  }

  .site-nav__dropdown {
    display: block;
    position: static;
    min-width: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: max-height 0.3s ease;
    border: none;
    border-radius: 0;
    box-shadow: none;
    padding: 0;
    margin: 0;
    background: transparent;
  }

  .site-nav__item--open > .site-nav__dropdown {
    max-height: 600px;
  }

  .site-nav__dropdown-link {
    padding: 10px 12px;
    font-size: 0.875rem;
    border-bottom: 1px solid rgba(0, 33, 71, 0.04);
  }

  .site-nav__submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    padding: 0 0 4px 16px;
    background: transparent;
  }

  .site-nav__submenu-link {
    padding: 8px 10px;
    font-size: 0.7rem;
  }

  .site-nav__item:last-child {
    border-bottom: none;
  }

  .site-nav__link {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-dark-blue);
  }

  .site-nav__link--active {
    font-weight: 700;
    text-decoration: none;
  }

  /* CTA as full-width link in mobile menu */
  .site-header--open .site-header__actions::before {
    content: '';
  }

  /* Mobile CTA inside nav drawer */
  .site-nav__mobile-cta {
    display: block;
    padding: 20px 0 6px;
  }

  .site-nav__mobile-cta-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 52px;
    width: 100%;
    background-color: var(--color-dark-navy);
    color: #fff;
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition: background-color 0.2s ease;
  }

  .site-nav__mobile-cta-btn:hover {
    background-color: var(--color-dark-blue);
  }

  .site-nav__mobile-cta-btn:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: -2px;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .site-header__inner {
    padding: 14px 32px;
    gap: 28px;
  }

  .site-nav__list {
    gap: 24px;
  }
}


@media (prefers-reduced-motion: reduce) {
  .site-header {
    animation: none;
    transition: none;
  }
}