/* ============================================
   IEFYX HEADER & NAVIGATION
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: var(--transition-base);
  border-bottom: 1px solid transparent;
}

.header.is-scrolled {
  background: rgba(10, 14, 27, 0.72);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-bottom-color: var(--color-glass-border);
  height: 70px;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--space-6);
}

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

.logo__mark {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 2.65rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--color-text);
  display: flex;
  align-items: center;
}

.logo__mark .x-accent {
  position: relative;
  margin-left: 1px;
  background: linear-gradient(135deg, var(--color-lime) 0%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---- Nav ---- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
sup
{
  margin-bottom: 20px;
  font-size: 6px;
}
.nextline
{
  display: grid;
}
.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--fs-body-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.nav__link:hover,
.nav__item.is-open .nav__link {
  color: var(--color-text);
  background: var(--color-glass);
}

.nav__chevron {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav__item.is-open .nav__chevron {
  transform: rotate(180deg);
}

/* ---- Mega menu ---- */
.mega {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 50%;
  transform: translate(-50%, 8px);
  width: min(820px, 92vw);
  background: rgba(15, 20, 36, 0.92);
  border: 1px solid var(--color-glass-border);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: 100;
}

.nav__item.is-open .mega {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.mega--platform { width: min(680px, 92vw); }
.mega--solutions { width: min(900px, 92vw); }
.mega--resources { width: min(760px, 92vw); }

.mega__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}

.mega--platform .mega__grid,
.mega--resources .mega__grid {
  grid-template-columns: repeat(2, 1fr);
}

.mega__col-title {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-1);
}

.mega__link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.mega__link:hover {
  background: var(--color-glass);
}

.mega__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-glass);
  border: 1px solid var(--color-glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary-light);
}

.mega__icon svg { width: 18px; height: 18px; }

.mega__link-title {
  font-size: var(--fs-body-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.mega__link-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: var(--lh-snug);
}

.mega__footer {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.mega__footer-text {
  font-size: var(--fs-body-sm);
  color: var(--color-text-muted);
}

.mega__footer-text strong {
  color: var(--color-text);
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-body);
  margin-bottom: 2px;
}

/* ---- Header actions ---- */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

/* ---- Mobile toggle ---- */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-glass);
  border: 1px solid var(--color-glass-border);
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-text);
  position: relative;
  transition: var(--transition-fast);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-text);
  transition: var(--transition-fast);
}

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

.nav-toggle.is-active span { background: transparent; }
.nav-toggle.is-active span::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle.is-active span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .nav__list { display: none; }
  .header__actions .btn-ghost { display: none; }
  .nav-toggle { display: flex; }

  .mobile-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 999;
    overflow-y: auto;
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
  }

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

  .mobile-nav__list {
    display: flex;
    flex-direction: column;
  }

  .mobile-nav__item {
    border-bottom: 1px solid var(--color-glass-border);
  }

  .mobile-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    font-size: var(--fs-body-lg);
    font-weight: 600;
    color: var(--color-text);
  }

  .mobile-nav__chevron {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
  }

  .mobile-nav__item.is-open .mobile-nav__chevron {
    transform: rotate(180deg);
  }

  .mobile-nav__submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
  }

  .mobile-nav__item.is-open .mobile-nav__submenu {
    max-height: 600px;
  }

  .mobile-nav__submenu-link {
    display: block;
    padding: var(--space-3) 0 var(--space-3) var(--space-4);
    color: var(--color-text-muted);
    font-size: var(--fs-body-sm);
  }

  .mobile-nav__actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: var(--space-6);
  }

  .mobile-nav__actions .btn {
    width: 100%;
  }
}

@media (min-width: 1101px) {
  .mobile-nav { display: none; }
}