/* ============================================================
   Header — fixed nav, transparent-over-hero → solid on scroll
   ============================================================ */

.header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-header);
  padding-block: var(--space-5);
  transition: padding var(--duration-base) var(--ease-out), background var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

.header.is-scrolled {
  padding-block: var(--space-3);
  background: rgba(243, 244, 246, 0.86);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: 0  25px;
}

.header__brand {
  display: inline-flex;
  flex-shrink: 0;
}

.header__logo {
  height: 60px;
  width: auto;
}

.header__nav {
  display: none;
}

.header__nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__nav a {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-body);
  transition: color var(--duration-fast) var(--ease-out);
}

.header__nav a:hover {
  color: var(--color-accent-primary-hover);
}

.header__cta {
  display: none;
}

.header__menu-toggle {
  position: relative;
  z-index: var(--z-header);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  background: var(--color-navy-900);
  color: var(--color-white);
  flex-shrink: 0;
}

.header__menu-toggle svg {
  width: 18px;
  height: 18px;
}

[data-menu-icon-close] { display: none; }

.header__menu-toggle[aria-expanded="true"] [data-menu-icon-open] { display: none; }
.header__menu-toggle[aria-expanded="true"] [data-menu-icon-close] { display: block; }

.header__mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-menu);
  background: var(--color-bg-inverted);
  color: var(--color-text-on-inverted);
  display: flex;
  flex-direction: column;
  /* topo reservado para a barra do header, que fica por cima do overlay */
  padding: var(--space-9) var(--container-pad) var(--space-8);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--duration-slow) var(--ease-out), opacity var(--duration-slow) var(--ease-out), visibility 0s linear var(--duration-slow);
}

body:has([data-mobile-menu].is-open) .header.is-scrolled {
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.header__mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  transition: transform var(--duration-slow) var(--ease-out), opacity var(--duration-slow) var(--ease-out), visibility 0s;
}

.header__mobile-menu > nav {
  margin-block-start: auto;
}

.header__mobile-menu > .btn-primary {
  margin-block-end: auto;
}

.header__mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.header__mobile-menu a {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 500;
}

.header__mobile-menu .btn-primary {
  align-self: flex-start;
}

@media (min-width: 1024px) {
  .header__nav {
    display: block;
  }

  .header__cta {
    display: none;
  }

  .header__menu-toggle {
    display: none;
  }

  .header__mobile-menu {
    display: none;
  }
}