/* ============================================
   Header — Glassmorphism, navegação, menu mobile
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: var(--header-h);
  background: rgba(7, 11, 24, 0.72);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease),
    box-shadow var(--dur-base) var(--ease);
}

.site-header.is-scrolled {
  background: rgba(7, 11, 24, 0.9);
  border-bottom-color: var(--c-border);
  box-shadow: var(--shadow-md);
}

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

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

.site-header__logo-img {
  width: 150px;
  height: auto;
}

/* === Navegação desktop === */
.site-header__nav {
  display: flex;
  align-items: center;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.875rem;
  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-soft), background var(--dur-fast) var(--ease-soft);
}

.site-header__nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.site-header__cta {
  flex-shrink: 0;
}

/* === Toggle mobile === */
.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.05);
}

.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-fast) 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);
}

/* === Menu mobile === */
.site-header__mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: min(320px, 86vw);
  height: 100dvh;
  padding: var(--sp-8) var(--sp-6) var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  background: rgba(10, 15, 31, 0.98);
  border-left: 1px solid var(--c-border);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease);
  z-index: calc(var(--z-header) + 2);
  overflow-y: auto;
}

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

.site-header__mobile-nav-close {
  align-self: flex-end;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: var(--sp-4);
  border-radius: var(--radius-sm);
  color: var(--c-text-secondary);
  border: 1px solid var(--c-border);
}

.site-header__mobile-nav-close:hover {
  color: #fff;
  border-color: var(--c-violet);
}

.site-header__mobile-link {
  padding: 0.875rem 1rem;
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--c-text);
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast) var(--ease-soft), color var(--dur-fast) var(--ease-soft);
}

.site-header__mobile-link:hover {
  color: var(--c-cyan-soft);
  background: rgba(255, 255, 255, 0.06);
}

.site-header__mobile-cta {
  margin-top: var(--sp-4);
}

/* === Overlay === */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-header) + 1);
  background: rgba(2, 6, 23, 0.6);
  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;
}