/* ============================================
   Header — transparente → glass sticky + mega menu
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease),
    border-color var(--dur-base) var(--ease),
    backdrop-filter var(--dur-base) var(--ease),
    box-shadow var(--dur-base) var(--ease);
}

.site-header.is-scrolled {
  background: rgba(7, 11, 24, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--c-border);
  box-shadow: 0 8px 32px rgba(2, 6, 23, 0.5);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--sp-5);
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.site-header__logo-img {
  width: 100%;
  height: auto;
}

/* === Navegação desktop === */
.site-header__nav {
  display: none;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-header__nav-item {
  position: relative;
}

.site-header__nav-item::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 12px;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.6rem 0.85rem;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--c-text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.site-header__nav-link:hover {
  color: var(--c-text);
  background: var(--c-bg-glass);
}

.site-header__nav-link[aria-current='page'] {
  color: var(--c-text);
}

.site-header__nav-link[aria-haspopup='true'] svg {
  transition: transform var(--dur-base) var(--ease);
}

.site-header__nav-item:hover > .site-header__nav-link[aria-haspopup='true'] svg {
  transform: rotate(180deg);
}

/* === Mega menu === */
.site-header__megamenu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  width: min(680px, 90vw);
  padding: var(--sp-6);
  background: rgba(10, 15, 31, 0.92);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease),
    transform var(--dur-base) var(--ease), visibility var(--dur-base) var(--ease);
}

.site-header__nav-item:hover .site-header__megamenu,
.site-header__nav-item:focus-within .site-header__megamenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.site-header__megamenu-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--sp-4);
  margin-bottom: var(--sp-4);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  border-bottom: 1px solid var(--c-border);
}

.site-header__megamenu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.25rem;
}

.site-header__megamenu-link {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast) var(--ease);
}

.site-header__megamenu-link:hover {
  background: var(--c-bg-glass);
}

.site-header__megamenu-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  color: var(--c-cyan-soft);
  background: linear-gradient(135deg, rgba(124, 77, 255, 0.18), rgba(34, 211, 238, 0.1));
  border: 1px solid rgba(124, 77, 255, 0.3);
  border-radius: var(--radius-sm);
}

.site-header__megamenu-link span {
  display: flex;
  flex-direction: column;
}

.site-header__megamenu-name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--c-text);
}

.site-header__megamenu-desc {
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  margin-top: 0.15rem;
}

.site-header__megamenu-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--c-border);
  font-size: var(--fs-sm);
}

.site-header__megamenu-footer a {
  font-weight: var(--fw-semibold);
  color: var(--c-cyan-soft);
}

/* === CTA header === */
.site-header__cta {
  flex-shrink: 0;
}

/* === Toggle mobile === */
.site-header__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--c-border);
}

.site-header__toggle-bar {
  width: 100%;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease), opacity var(--dur-base) var(--ease);
}

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded='true'] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* === Mobile nav (drawer) === */
.site-header__mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-overlay);
  width: min(340px, 88vw);
  padding: var(--sp-6);
  background: rgba(7, 11, 24, 0.98);
  border-left: 1px solid var(--c-border);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease);
}

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

.site-header__mobile-nav-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-left: auto;
  margin-bottom: var(--sp-5);
  border-radius: var(--radius-sm);
  color: var(--c-text-secondary);
}

.site-header__mobile-nav-close:hover {
  color: var(--c-text);
  background: var(--c-bg-glass);
}

.site-header__mobile-link {
  display: block;
  padding: 0.8rem 0;
  font-family: var(--ff-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border);
}

.site-header__mobile-sub {
  padding: 0.35rem 0 0.6rem 1rem;
}

.site-header__mobile-sub-link {
  display: block;
  padding: 0.45rem 0;
  font-size: var(--fs-sm);
  color: var(--c-text-secondary);
}

.site-header__mobile-sub-link:hover {
  color: var(--c-cyan-soft);
}

.site-header__mobile-cta {
  margin-top: var(--sp-5);
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-overlay) - 1);
  background: rgba(2, 6, 23, 0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-base) var(--ease), visibility var(--dur-base) var(--ease);
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* === Breakpoints === */
@media (min-width: 1024px) {
  .site-header__nav {
    display: block;
  }

  .site-header__cta-desktop {
    display: inline-flex;
  }

  .site-header__toggle {
    display: none;
  }
}

@media (max-width: 1023px) {
  .site-header__cta-desktop {
    display: none;
  }
}