/* ============================================================
   HEADER.CSS — Header, navegação, menu mobile
   ============================================================ */

/* ──────────────────────────────────────────────
   HEADER BASE
   ────────────────────────────────────────────── */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  z-index: var(--z-header);
  transition: transform 0.4s var(--ease-out-quart),
              background-color 0.4s ease,
              border-color 0.4s ease,
              box-shadow 0.4s ease;
  border-bottom: 1px solid transparent;
}

/* Estado transparente (topo da página) */
.header--transparent {
  background-color: transparent;
}

.header--transparent .header__logo,
.header--transparent .nav__link,
.header--transparent .header__cta {
  color: var(--color-white);
}

.header--transparent .nav__link::after {
  background-color: var(--color-white);
}

.header--transparent .header__cta {
  border-color: rgba(255, 255, 255, 0.4);
}

.header--transparent .header__cta:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

/* Estado glass (após scroll) */
.header--glass {
  background: rgba(245, 242, 238, 0.75);
  backdrop-filter: blur(24px) saturate(1.3);
  -webkit-backdrop-filter: blur(24px) saturate(1.3);
  border-bottom-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
}

@supports not (backdrop-filter: blur(1px)) {
  .header--glass {
    background: rgba(245, 242, 238, 0.97);
  }
}

.header--glass .header__logo,
.header--glass .nav__link {
  color: var(--color-black);
}

.header--glass .nav__link::after {
  background-color: var(--color-black);
}

.header--glass .header__cta {
  color: var(--color-black);
  border-color: var(--color-black);
}

.header--glass .header__cta:hover {
  background: var(--color-black);
  color: var(--color-offwhite);
}

/* Esconder header no scroll down */
.header--hidden {
  transform: translateY(-100%);
}

/* Quando menu móvel estiver aberto, header fica acima dele */
.header--menu-open {
  z-index: calc(var(--z-overlay) + 10) !important;
}

/* ──────────────────────────────────────────────
   HEADER INNER
   ────────────────────────────────────────────── */

.header__inner {
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  height: 100%;
}

.header__inner > .header__logo {
  position: absolute;
  left: var(--section-padding-x);
  top: 50%;
  transform: translateY(-50%);
}

.header__inner > .nav {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.header__inner > .header__cta {
  display: none;
}

/* ──────────────────────────────────────────────
   LOGO
   ────────────────────────────────────────────── */

.header__logo {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-wide);
  text-decoration: none;
  color: var(--color-white);
  transition: color var(--transition-base);
  line-height: 1;
  white-space: nowrap;
  display: flex;
  align-items: center;
}

.header__logo:hover {
  color: var(--color-champagne);
}

.header__logo:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* ──────────────────────────────────────────────
   NAVEGAÇÃO DESKTOP
   ────────────────────────────────────────────── */

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

.nav__list {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
  text-align: center;
}

.nav__link {
  position: relative;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-regular);
  letter-spacing: var(--tracking-wide);
  text-decoration: none;
  color: var(--color-white);
  padding: var(--space-xs) 0;
  transition: color var(--transition-base);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: currentColor;
  transition: width var(--transition-base) var(--ease-out-quart);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__link:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

/* ──────────────────────────────────────────────
   CTA HEADER
   ────────────────────────────────────────────── */

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-white);
  padding: var(--space-xs) var(--space-lg);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.header__cta:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

/* ──────────────────────────────────────────────
   MENU HAMBÚRGUER (MOBILE)
   ────────────────────────────────────────────── */

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: calc(var(--z-overlay) + 1);
}

.menu-toggle__bar {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: currentColor;
  transition: transform 0.3s var(--ease-out-quart),
              opacity 0.3s ease;
  transform-origin: center;
}

.menu-toggle__bar + .menu-toggle__bar {
  margin-top: 6px;
}

/* Animação para X */
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ──────────────────────────────────────────────
   MENU MOBILE OVERLAY
   ────────────────────────────────────────────── */

.mobile-menu {
  display: none;
}

@media (max-width: 768px) {
  .nav, .header__cta--desktop {
    display: none;
  }
  
  .header__inner {
    display: flex;
    position: relative;
  }

  .header__inner > .header__logo {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    margin: 0;
  }

  .menu-toggle {
    display: flex;
    position: absolute;
    right: var(--section-padding-x);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-white);
  }

  .mobile-menu {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.92);
    backdrop-filter: blur(32px) saturate(1.3);
    -webkit-backdrop-filter: blur(32px) saturate(1.3);
    z-index: var(--z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease,
                visibility 0.4s ease;
  }

  @supports not (backdrop-filter: blur(1px)) {
    .mobile-menu {
      background: rgba(26, 26, 26, 0.97);
    }
  }

  .mobile-menu.is-open {
    opacity: 1;
    visibility: visible;
  }

  .mobile-menu__inner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    padding: var(--space-3xl);
    gap: var(--space-lg);
  }

  .mobile-menu__link {
    font-family: var(--font-serif);
    font-size: var(--text-3xl);
    font-weight: var(--weight-light);
    color: var(--color-offwhite);
    text-decoration: none;
    letter-spacing: var(--tracking-wide);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease,
                transform 0.4s var(--ease-out-quart),
                color var(--transition-base);
  }

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

  /* Stagger animation */
  .mobile-menu.is-open .mobile-menu__link:nth-child(1) { transition-delay: 0.05s; }
  .mobile-menu.is-open .mobile-menu__link:nth-child(2) { transition-delay: 0.1s; }
  .mobile-menu.is-open .mobile-menu__link:nth-child(3) { transition-delay: 0.15s; }
  .mobile-menu.is-open .mobile-menu__link:nth-child(4) { transition-delay: 0.2s; }
  .mobile-menu.is-open .mobile-menu__link:nth-child(5) { transition-delay: 0.25s; }
  .mobile-menu.is-open .mobile-menu__link:nth-child(6) { transition-delay: 0.3s; }
  .mobile-menu.is-open .mobile-menu__link:nth-child(7) { transition-delay: 0.35s; }
  .mobile-menu.is-open .mobile-menu__link:nth-child(8) { transition-delay: 0.4s; }

  .mobile-menu__link:hover,
  .mobile-menu__link:focus {
    color: var(--color-champagne);
  }

  .mobile-menu__link:focus-visible {
    outline: 2px solid var(--color-champagne);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
  }

  .mobile-menu__cta {
    margin-top: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease 0.4s,
                transform 0.4s var(--ease-out-quart) 0.4s;
  }

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

  /* Header height on mobile */
  .header {
    height: var(--header-height-mobile);
  }
}