/* ============================================================
   ASA TRANSPORTES — Header CSS
   Menu fixo, logo, navegação desktop e mobile
   ============================================================ */

/* ── Header Principal ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background: transparent;
  overflow: hidden; /* Impede que conteúdo interno (logo) estoure a barra */
  transition: background var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

/* Header com scroll: fundo sólido escuro */
.site-header.scrolled {
  background: var(--color-azul-900);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* Header inicial: glassmorphism sutil */
.site-header:not(.scrolled) {
  background: linear-gradient(to bottom, rgba(5,13,26,0.95) 0%, rgba(5,13,26,0.7) 100%);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* ── Logo ── */
.header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.header__logo-img {
  height: 54px;
  max-height: 54px;        /* Trava a altura máxima */
  max-width: 160px;        /* Evita que o logo estoure horizontalmente */
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.5));
  transition: transform var(--transition-base);
}

.header__logo:hover .header__logo-img {
  transform: scale(1.03);
}

/* ── Navegação Desktop ── */
.header__nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__item {
  position: relative;
}

.nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-branco-80);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 70%;
  height: 2px;
  background: var(--color-azul-300);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-branco);
  background: var(--color-branco-10);
}

.nav__link:hover::after,
.nav__link.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* ── CTA Header ── */
.header__cta {
  flex-shrink: 0;
}

.header__cta .btn {
  background: transparent;
  color: var(--color-branco);
  border: 2px solid var(--color-branco);
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-4);
  letter-spacing: 0.05em;
}

.header__cta .btn:hover {
  background: var(--color-azul-400);
  border-color: var(--color-azul-400);
  transform: translateY(-1px);
  color: var(--color-branco);
}

/* ── Hamburger Mobile ── */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--color-branco-10);
  border: 1px solid var(--color-branco-10);
  cursor: pointer;
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.header__hamburger:hover {
  background: var(--color-branco-10);
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-branco);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-fast);
  transform-origin: center;
}

/* Hamburger → X quando aberto */
.header__hamburger.open .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger.open .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__hamburger.open .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Menu Mobile Overlay ── */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  z-index: var(--z-dropdown);
  background: var(--color-azul-900);
  border-top: 1px solid var(--color-branco-10);
  padding: var(--space-6);
  transform: translateY(-10px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
}

.mobile-menu__link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-branco-80);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--color-branco-10);
  transition: all var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link.active {
  background: var(--color-branco-10);
  color: var(--color-branco);
  padding-left: var(--space-6);
}

.mobile-menu__cta {
  padding-top: var(--space-4);
}

.mobile-menu__cta .btn {
  width: 100%;
  justify-content: center;
}