/* ============================================
   Header — Cabeçalho e navegação (glass dark)
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  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: box-shadow var(--t-base), border-color var(--t-base), background var(--t-base);
}

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

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.site-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.site-header__logo-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
}

.site-header__logo-text {
  font-family: var(--ff-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-extrabold);
  color: var(--c-text);
  letter-spacing: var(--ls-tight);
}

.site-header__logo-text span { color: var(--c-accent-500); }

.site-header__nav {
  display: none;
  align-items: center;
  gap: var(--sp-1);
}

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

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

.site-header__nav-link {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--c-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--t-fast);
  text-decoration: none;
  white-space: nowrap;
}

.site-header__nav-link:hover,
.site-header__nav-link[aria-current="page"] {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.site-header__nav-link svg {
  width: 12px;
  height: 12px;
  transition: transform var(--t-fast);
}

.site-header__nav-item:hover .site-header__nav-link svg { transform: rotate(180deg); }

.site-header__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: rgba(10, 15, 31, 0.98);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--sp-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--t-fast);
  z-index: var(--z-dropdown);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.site-header__nav-item:hover .site-header__dropdown,
.site-header__nav-item:focus-within .site-header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-header__dropdown-link {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--fs-sm);
  color: var(--c-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--t-fast);
  text-decoration: none;
}

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

.site-header__dropdown-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  color: var(--c-accent-500);
}

.site-header__dropdown-link:hover .site-header__dropdown-icon { background: rgba(124, 77, 255, 0.15); }

.site-header__cta { margin-left: var(--sp-4); }

.site-header__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: var(--sp-2);
  z-index: calc(var(--z-header) + 1);
  background: rgba(255, 255, 255, 0.05);
}

.site-header__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all var(--t-base);
  transform-origin: center;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.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: rotate(-45deg) translate(5px, -5px); }

.site-header__mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(320px, 86vw);
  height: 100vh;
  height: 100dvh;
  background: rgba(10, 15, 31, 0.98);
  box-shadow: -4px 0 32px rgba(0, 0, 0, 0.5);
  transition: right var(--t-base);
  z-index: var(--z-header);
  overflow-y: auto;
  padding: calc(var(--header-h) + var(--sp-6)) var(--sp-6) var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid var(--c-border);
}

.site-header__mobile-nav[aria-hidden="false"] { right: 0; }

.site-header__mobile-nav-close {
  position: absolute;
  top: var(--sp-4);
  right: var(--sp-4);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  color: var(--c-text);
  border: 1px solid var(--c-border);
  cursor: pointer;
  transition: background var(--t-fast);
}

.site-header__mobile-nav-close:hover { background: rgba(124, 77, 255, 0.15); }

.site-header__mobile-link {
  display: block;
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--c-text);
  border-radius: var(--radius-sm);
  transition: all var(--t-fast);
  text-decoration: none;
  border-bottom: 1px solid var(--c-border-light);
}

.site-header__mobile-link:hover,
.site-header__mobile-link[aria-current="page"] {
  background: rgba(255, 255, 255, 0.06);
  color: var(--c-accent-500);
}

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

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.6);
  z-index: calc(var(--z-header) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base);
}

.nav-overlay.visible { opacity: 1; pointer-events: auto; }

@media (min-width: 1024px) {
  .site-header__nav { display: flex; }
  .site-header__toggle { display: none; }
  .site-header__mobile-nav { display: none; }
  .nav-overlay { display: none; }
  .site-header__cta-desktop { display: inline-flex; }
  .site-header__cta-mobile { display: none; }
}

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