/* =============================================
   ZERO GRAU FILMES — header.css
   Header, nav, hamburger, menu mobile
   ============================================= */

/* =============================================
   HEADER — Liquid Glass intenso, blur progressivo
   ============================================= */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  /* Estado base — blur progressivo via JS */
  background: rgba(10, 10, 10, 0.3);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.05) inset,
    0 20px 60px rgba(0, 0, 0, 0.4);
  transition: background 0.4s var(--bez), backdrop-filter 0.4s var(--bez), -webkit-backdrop-filter 0.4s var(--bez);
}

/* Logo: ZERO (400) GRAU (800) */
.logo {
  display: flex;
  align-items: baseline;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  line-height: 1;
  position: relative;
  padding: 6px 0;
}

.logo span   { font-weight: 400; }
.logo strong { font-weight: 800; }

/* Nav desktop */
nav {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Pílula glass sob item em hover */
.nav-pill {
  position: absolute;
  height: 38px;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 1px 8px rgba(0, 0, 0, 0.3);
  pointer-events: none;
  opacity: 0;
  transition: left 0.3s var(--bez), width 0.3s var(--bez), opacity 0.25s var(--bez);
}

.nav-link {
  position: relative;
  z-index: 1;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0;
  text-transform: none;
  opacity: 0.65;
  transition: color 0.3s var(--bez), opacity 0.3s var(--bez);
  white-space: nowrap;
}

.nav-link:hover { opacity: 1; }

.nav-link.active { color: var(--zg-pink); opacity: 1; font-weight: 500; }

/* @property para animar o stroke giratório */
@property --angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@keyframes spin-angle {
  to { --angle: 360deg; }
}

/* Header contact CTA button */
.header-cta {
  position: relative;
  padding: 7px 20px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

/* Stroke rosa estático (aparece no hover) */
.header-cta::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  border: 1px solid var(--zg-pink);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.header-cta:hover {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.18),
    inset 0 -1px 0 rgba(0,0,0,0.2),
    0 4px 16px rgba(0,0,0,0.4);
  transform: translateY(-1px);
}

.header-cta:hover::after {
  opacity: 1;
}

/* ---- Hamburger ---- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.35s var(--bez);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---- Menu mobile — painel glass forte ---- */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  padding: 16px 32px 36px;
  background: rgba(9, 9, 15, 0.9);
  backdrop-filter: blur(48px) saturate(220%) brightness(1.1);
  -webkit-backdrop-filter: blur(48px) saturate(220%) brightness(1.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.07) inset,
    0 32px 80px rgba(0, 0, 0, 0.7);
  flex-direction: column;
  z-index: 99;
  opacity: 0;
  transform: translateY(-12px);
  pointer-events: none;
  transition: opacity 0.4s var(--bez), transform 0.4s var(--bez);
}

.mobile-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.mobile-menu a {
  display: block;
  padding: 18px 0;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color 0.3s var(--bez), padding-left 0.3s var(--bez);
}

.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a.active     { color: var(--zg-pink); }
.mobile-menu a:hover      { padding-left: 8px; color: var(--zg-pink-lt); }

/* NAV ACTIVE — laranja em todas as páginas */

/* =============================================
   RESPONSIVIDADE — Header
   ============================================= */
@media (max-width: 768px) {
  header { padding: 0 24px; }
  nav    { display: none; }

  .header-cta {
    margin-left: auto;
    margin-right: 8px;
    font-size: 12px;
    padding: 6px 14px;
  }

  .hamburger   { display: flex; }
  .mobile-menu {
    display: flex;
    background: rgba(10, 10, 10, 0.65);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 0.5px solid rgba(255, 255, 255, 0.1);
  }
}