/* ================================================
   HEADER CSS — InfiWits Theme
   ================================================ */

/* ---- Site Header ---- */
.iw-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background var(--transition-normal), box-shadow var(--transition-normal),
              transform var(--transition-normal);
}

.iw-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}

/* Transparent by default (over hero) */
.iw-header:not(.is-sticky) {
  background: transparent;
}

/* Sticky state */
.iw-header.is-sticky {
  background: rgba(14, 19, 34, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(178, 197, 255, 0.08), 0 4px 24px rgba(0,0,0,0.3);
}

/* Hidden state (scroll down) */
.iw-header.is-hidden {
  transform: translateY(-100%);
}

/* ---- Logo ---- */
.iw-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.iw-header__logo img,
.iw-header__logo .custom-logo,
.iw-header .custom-logo-link img,
.iw-header img.custom-logo {
  height: 44px !important;
  width: auto !important;
  max-width: 200px !important;
  max-height: 44px !important;
  object-fit: contain;
}

.iw-header__logo .custom-logo-link,
.iw-header .custom-logo-link {
  display: flex;
  align-items: center;
}

.iw-header__logo-text {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-on-surface);
  letter-spacing: -0.03em;
}

/* ---- Nav ---- */
.iw-nav { display: none; }

@media (min-width: 1024px) {
  .iw-nav {
    display: flex;
    flex: 1;
    justify-content: center;
  }
}

.iw-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.iw-nav__link {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.iw-nav__link:hover,
.iw-nav__link:focus-visible {
  color: var(--color-on-surface);
  background: rgba(178, 197, 255, 0.06);
}

.iw-nav__chevron {
  opacity: 0.6;
  transition: transform var(--transition-fast);
}

.iw-has-mega:hover .iw-nav__chevron { transform: rotate(180deg); }

/* ---- Mega Menu ---- */
.iw-mega-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  width: min(860px, calc(100vw - 2rem));
  background: rgba(22, 27, 43, 0.97);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(178, 197, 255, 0.08);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 48px rgba(0,0,0,0.5), var(--shadow-primary);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast),
              transform var(--transition-fast);
  transform: translateX(-50%) translateY(-8px);
}

.iw-mega-menu.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.iw-has-mega { position: relative; }

.iw-mega-menu__inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
}

.iw-mega-menu__col {
  padding: var(--space-4) var(--space-5);
}

.iw-mega-menu__col + .iw-mega-menu__col {
  border-left: 1px solid rgba(178,197,255,0.07);
}

.iw-mega-menu__heading {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-tertiary);
  margin-bottom: var(--space-4);
}

.iw-mega-menu__link {
  display: block;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-1);
  transition: background var(--transition-fast);
}

.iw-mega-menu__link:hover {
  background: rgba(178, 197, 255, 0.07);
}

.iw-mega-menu__link-title {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-on-surface);
}

.iw-mega-menu__link-sub {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  margin-top: 0.125rem;
}

.iw-mega-menu__cta-box {
  margin-top: var(--space-5);
  background: rgba(0, 102, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.iw-mega-menu__cta-box p {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  margin-bottom: var(--space-3);
}

/* ---- Header Actions ---- */
.iw-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Hide CTA button on mobile — accessible via mobile nav */
@media (max-width: 767px) {
  .iw-header__actions .iw-btn { display: none; }
  .iw-header__logo img,
  .iw-header__logo .custom-logo,
  .iw-header .custom-logo-link img,
  .iw-header img.custom-logo {
    height: 36px !important;
    max-height: 36px !important;
  }
  .iw-header__inner { height: 60px; }
  .iw-main { padding-top: 60px; }
}

/* ---- Hamburger ---- */
.iw-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  padding: 8px;
  transition: background var(--transition-fast);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .iw-hamburger { display: none; }
}

.iw-hamburger span {
  display: block;
  height: 2px;
  background: var(--color-on-surface);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.iw-hamburger:hover { background: rgba(178,197,255,0.08); }

/* ---- Mobile Nav Panel ---- */
.iw-mobile-nav {
  position: fixed;
  top: 0; right: 0;
  bottom: 0;
  width: min(340px, 100vw);
  background: var(--color-surface-container-low);
  border-left: 1px solid var(--glass-border);
  z-index: 1100;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: var(--space-6);
}

.iw-mobile-nav.is-open {
  transform: translateX(0);
}

.iw-mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.iw-mobile-nav__logo img { height: 40px; width: auto; }
.iw-mobile-nav__logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-on-surface);
}

.iw-mobile-nav__close {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-surface-container-high);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-on-surface-variant);
  transition: background var(--transition-fast);
}

.iw-mobile-nav__close:hover {
  background: var(--color-surface-container-highest);
  color: var(--color-on-surface);
}

.iw-mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
}

.iw-mobile-nav__item-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-on-surface);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.iw-mobile-nav__item-trigger:hover,
.iw-mobile-nav__has-sub.is-open .iw-mobile-nav__item-trigger {
  background: var(--color-surface-container);
}

.iw-mobile-nav__sub {
  padding-left: var(--space-4);
  margin-top: var(--space-1);
  display: none;
}

.iw-mobile-nav__has-sub.is-open .iw-mobile-nav__sub {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.iw-mobile-nav__sub a {
  display: block;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.iw-mobile-nav__sub a:hover {
  color: var(--color-on-surface);
  background: rgba(178,197,255,0.06);
}

.iw-mobile-nav__list a {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-on-surface);
  transition: background var(--transition-fast);
}

.iw-mobile-nav__list a:hover {
  background: var(--color-surface-container);
}

.iw-mobile-nav__cta {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--glass-border);
}

.iw-mobile-nav__cta .iw-btn { width: 100%; justify-content: center; }

/* ---- Mobile Overlay ---- */
.iw-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 1050;
}

.iw-mobile-overlay.is-visible {
  display: block;
}

/* ---- Offset for sticky header ---- */
.iw-main { padding-top: 72px; }