/* ============================================================
   Site Header + Navigation
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base);
}

.site-header--scrolled {
  box-shadow: var(--shadow-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ---- Logo ---- */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-editorial);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
  flex-shrink: 0;
}

.site-logo img {
  height: 32px;
  width: auto;
}

.site-logo:hover {
  color: var(--color-text);
}

/* ---- Desktop Navigation ---- */
.nav {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

/* ---- Solutions Dropdown ---- */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__dropdown-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.nav__dropdown-toggle::after {
  content: '';
  width: 12px;
  height: 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 256 256'%3E%3Cpath fill='%23787774' d='M213.66 101.66l-80 80a8 8 0 0 1-11.32 0l-80-80a8 8 0 0 1 11.32-11.32L128 164.69l74.34-74.35a8 8 0 0 1 11.32 11.32Z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  transition: transform var(--transition-fast);
}

.nav__dropdown:hover .nav__dropdown-toggle::after {
  transform: rotate(180deg);
}

.nav__dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-card);
}

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

.nav__dropdown-link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__dropdown-link:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

/* ---- Header CTA ---- */
.header-cta {
  display: none;
}

/* ---- Hamburger (mobile) ---- */
.hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  cursor: pointer;
  z-index: 110;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.hamburger:hover {
  background: var(--color-surface-alt);
}

.hamburger__line {
  position: relative;
  width: 20px;
  height: 14px;
}

.hamburger__line span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition-base);
}

.hamburger__line span:nth-child(1) { top: 0; }
.hamburger__line span:nth-child(2) { top: 6px; }
.hamburger__line span:nth-child(3) { top: 12px; }

/* Hamburger open state */
.hamburger--open .hamburger__line span:nth-child(1) {
  top: 6px;
  transform: rotate(45deg);
}

.hamburger--open .hamburger__line span:nth-child(2) {
  opacity: 0;
}

.hamburger--open .hamburger__line span:nth-child(3) {
  top: 6px;
  transform: rotate(-45deg);
}

/* ---- Mobile Menu Backdrop ---- */
.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  -webkit-tap-highlight-color: transparent;
}

.mobile-menu-backdrop--open {
  opacity: 1;
  visibility: visible;
}

/* ---- Mobile Menu Panel ---- */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: var(--color-surface);
  z-index: 100;
  display: flex;
  flex-direction: column;
  padding: 72px var(--space-8) var(--space-10);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  overscroll-behavior: contain;
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.08);
}

.mobile-menu--open {
  transform: translateX(0);
}

/* Staggered link entrance */
.mobile-menu--open .mobile-menu__link,
.mobile-menu--open .mobile-menu__dropdown {
  opacity: 1;
  transform: translateX(0);
}

.mobile-menu__link {
  display: block;
  padding: var(--space-5) 0;
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  opacity: 0;
  transform: translateX(12px);
  transition: opacity 0.35s ease, transform 0.35s ease, color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-menu--open .mobile-menu__link:nth-child(1),
.mobile-menu--open .mobile-menu__link:nth-child(2) { transition-delay: 0.05s; }
.mobile-menu--open .mobile-menu__link:nth-child(3) { transition-delay: 0.1s; }
.mobile-menu--open .mobile-menu__link:nth-child(4) { transition-delay: 0.13s; }
.mobile-menu--open .mobile-menu__link:nth-child(5) { transition-delay: 0.16s; }
.mobile-menu--open .mobile-menu__link:nth-child(6) { transition-delay: 0.19s; }

.mobile-menu__link:active {
  color: var(--color-primary);
  transform: scale(0.98);
}

.mobile-menu__link--active {
  color: var(--color-primary) !important;
  font-weight: var(--font-semibold);
}

.mobile-menu__dropdown {
  border-bottom: 1px solid var(--color-border);
  opacity: 0;
  transform: translateX(12px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.mobile-menu--open .mobile-menu__dropdown {
  transition-delay: 0.07s;
}

.mobile-menu__dropdown-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-5) 0;
  font-family: inherit;
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}

.mobile-menu__dropdown-toggle:active {
  color: var(--color-primary);
}

.mobile-menu__dropdown-toggle::after {
  content: '';
  width: 20px;
  height: 20px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 256 256'%3E%3Cpath fill='%23787774' d='M213.66 101.66l-80 80a8 8 0 0 1-11.32 0l-80-80a8 8 0 0 1 11.32-11.32L128 164.69l74.34-74.35a8 8 0 0 1 11.32 11.32Z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.mobile-menu__dropdown-toggle--open::after {
  transform: rotate(180deg);
}

.mobile-menu__submenu {
  max-height: 0;
  overflow: hidden;
  padding-left: var(--space-4);
  transition: max-height 0.35s ease, padding-bottom 0.35s ease;
}

.mobile-menu__submenu--open {
  max-height: 500px;
  padding-bottom: var(--space-4);
}

.mobile-menu__sublink {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-menu__sublink:active {
  color: var(--color-text);
}

.mobile-menu__cta {
  margin-top: auto;
  padding-top: var(--space-12);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.35s ease 0.22s, transform 0.35s ease 0.22s;
}

.mobile-menu--open .mobile-menu__cta {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Tablet+ ---- */
@media (min-width: 768px) {
  .hamburger {
    display: none;
  }

  .mobile-menu {
    display: none;
  }

  .mobile-menu-backdrop {
    display: none;
  }

  .nav {
    display: flex;
  }

  .header-cta {
    display: block;
  }
}