/* ================================================================
   HEADER.CSS — Navegação Principal Michelle Milan Eventos
   ----------------------------------------------------------------
   Conteúdo:
   1. Header Base & Glassmorphism
   2. Logo / Marca
   3. Menu Desktop
   4. Botão CTA do Nav
   5. Hamburguer (Mobile)
   6. Menu Mobile (Drawer)
   7. Header Scrolled (com fundo sólido)
   8. Responsive
   ================================================================ */

/* ----------------------------------------------------------------
   1. HEADER BASE & GLASSMORPHISM
   ---------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  width: 100%;

  /* Estado inicial: transparente sobre o hero */
  background: transparent;
  transition:
    background-color var(--transition-slow),
    backdrop-filter var(--transition-slow),
    box-shadow var(--transition-slow),
    padding var(--transition-slow);
}

/* Linha dourada decorativa no topo */
.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-gold);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

/* Estado: ao rolar a página (classe adicionada via JS) */
.site-header.scrolled {
  background: rgba(13, 12, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow:
    0 1px 0 rgba(201, 168, 76, 0.15),
    var(--shadow-dark-sm);
}

.site-header.scrolled::before {
  opacity: 1;
}

/* ----------------------------------------------------------------
   2. CONTAINER DE NAV
   ---------------------------------------------------------------- */
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--space-5) var(--space-6);
  gap: var(--space-8);
  transition: padding var(--transition-slow);
}

/* Reduz o padding vertical ao rolar */
.site-header.scrolled .nav-container {
  padding-block: var(--space-4);
}

@media (min-width: 768px) {
  .nav-container {
    padding-inline: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .nav-container {
    padding-inline: var(--space-12);
  }
}

/* ----------------------------------------------------------------
   3. LOGO / MARCA
   ---------------------------------------------------------------- */
.nav-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
  cursor: pointer;
  flex-shrink: 0;
  transition: opacity var(--transition-base);
  line-height: 1;
}

.nav-logo:hover {
  opacity: 0.85;
}

.logo-script {
  font-family: var(--font-script);
  font-size: 2rem;
  color: var(--color-gold-light);
  line-height: 1;
  letter-spacing: 0.02em;
  transition: color var(--transition-base);
  display: block;
}

@media (min-width: 768px) {
  .logo-script {
    font-size: 2.4rem;
  }
}

.logo-subtitle {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-light);
  letter-spacing: 0.30em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 2px;
  display: block;
  transition: color var(--transition-base);
}

.nav-logo:hover .logo-subtitle {
  color: var(--color-text-secondary);
}

/* ----------------------------------------------------------------
   4. MENU DESKTOP
   ---------------------------------------------------------------- */
.nav-menu {
  display: none; /* Oculto por padrão — Mobile First */
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
    position: relative;
  }
}

/* Links de Navegação */
.nav-link {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  position: relative;
  padding-bottom: var(--space-1);
  transition: color var(--transition-base);
}

/* Linha underline animada (efeito deslizante) */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--gradient-gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-gold-light);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Link ativo (classe adicionada via JS ao scroll) */
.nav-link.active {
  color: var(--color-gold);
}

.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
  background: var(--gradient-gold);
}

/* ----------------------------------------------------------------
   5. BOTÃO CTA DO NAV — "Contato"
   ---------------------------------------------------------------- */
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-inverse);
  text-decoration: none;
  background: var(--gradient-gold);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-gold-sm);
  white-space: nowrap;
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-base),
    filter var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* Shimmer hover */
.nav-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    120deg,
    transparent 0%,
    rgba(255, 255, 255, 0.18) 50%,
    transparent 100%
  );
  transition: left var(--transition-luxury);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  box-shadow: var(--shadow-gold-md);
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.nav-cta:hover::before,
.nav-cta:focus-visible::before {
  left: 150%;
}

.nav-cta:active {
  transform: translateY(0);
}

/* ----------------------------------------------------------------
   6. BOTÃO HAMBURGUER (MOBILE)
   ---------------------------------------------------------------- */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
  width: 28px;
  height: 18px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  position: relative;
  z-index: calc(var(--z-header) + 10);
  flex-shrink: 0;
}

/* Visível apenas no mobile */
@media (min-width: 1024px) {
  .nav-hamburger {
    display: none;
  }
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-gold-light);
  border-radius: var(--radius-full);
  transform-origin: center;
  transition:
    transform var(--transition-base),
    opacity var(--transition-base),
    width var(--transition-base),
    background-color var(--transition-base);
}

/* Linha do meio menor (efeito assimétrico elegante) */
.hamburger-line:nth-child(2) {
  width: 70%;
}

/* Estado aberto — transforma em X */
.nav-hamburger[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(8.5px) rotate(45deg);
}

.nav-hamburger[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: translateX(8px);
}

.nav-hamburger[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-8.5px) rotate(-45deg);
  width: 100%;
}

/* ----------------------------------------------------------------
   7. MENU MOBILE — Drawer Lateral
   ---------------------------------------------------------------- */
@media (max-width: 1023px) {
  .nav-menu {
    display: flex; /* Garante flex para o drawer */
    flex-direction: column;
    align-items: flex-start;
    gap: 0;

    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    height: 100dvh;
    padding: calc(80px + var(--space-8)) var(--space-8) var(--space-8);

    background: var(--color-dark-deep);
    border-left: 1px solid var(--color-dark-border);
    box-shadow: -8px 0 48px rgba(0, 0, 0, 0.60);

    /* Linha dourada lateral */
    background-image: linear-gradient(
      to bottom,
      rgba(201, 168, 76, 0.08) 0%,
      transparent 30%
    );

    /* Estado inicial: oculto à direita */
    transform: translateX(100%);
    visibility: hidden;
    opacity: 0;
    transition:
      transform var(--transition-luxury),
      opacity var(--transition-luxury),
      visibility var(--transition-luxury);

    overflow-y: auto;
    overscroll-behavior: contain;
  }

  /* Estado: menu aberto (classe adicionada via JS) */
  .nav-menu.is-open {
    transform: translateX(0);
    visibility: visible;
    opacity: 1;
  }

  /* Links no drawer mobile */
  .nav-menu li {
    width: 100%;
    border-bottom: 1px solid var(--color-dark-border);
  }

  .nav-menu li:last-child {
    border-bottom: none;
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-dark-border);
  }

  .nav-link {
    display: block;
    width: 100%;
    font-size: var(--fs-sm);
    letter-spacing: 0.20em;
    padding: var(--space-5) 0;
    color: var(--color-text-secondary);
  }

  .nav-link::after {
    display: none; /* Sem underline no mobile */
  }

  .nav-link:hover,
  .nav-link.active {
    color: var(--color-gold-light);
    padding-left: var(--space-3);
  }

  /* CTA "Contato" no mobile vira bloco completo */
  .nav-cta {
    display: block;
    width: 100%;
    text-align: center;
    padding: var(--space-4) var(--space-6);
  }

  /* Backdrop semi-transparente ao abrir o menu */
  .nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    z-index: calc(var(--z-header) - 1);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity var(--transition-base);
  }

  .nav-backdrop.is-visible {
    display: block;
    opacity: 1;
  }
}

/* ----------------------------------------------------------------
   8. DECORAÇÃO — Marca d'água no drawer mobile
   ---------------------------------------------------------------- */
@media (max-width: 1023px) {
  .nav-menu::after {
    content: 'MM';
    position: absolute;
    bottom: var(--space-8);
    right: var(--space-8);
    font-family: var(--font-script);
    font-size: 6rem;
    color: rgba(201, 168, 76, 0.04);
    pointer-events: none;
    line-height: 1;
    user-select: none;
  }
}